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Species Eubaculites carinatus Morton 1834 | ||||||
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| Diagnosis / Definition: | ||||||
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Cobban & Kennedy (1995): DESCRIPTION.- Holotype, a phosphatic internal mold of a body chamber and parts of two camerae, is 47.5 mm long with whorl breadth to height ratio 0.74 and angle of taper of 7 degrees. Whorl section pyriform with flattened dorsum, narrowly rounded dorsolateral margin, and broadly rounded flanks; greatest breadth below mid-flank. Outer flanks convergent. A faint longitudinal groove separates flanks from narrow tabulate venter with very narrowly rounded ventrolateral shoulder. Rib index 2.5. Ribs broad, strong and concave, as wide as interspaces, extending from dorsolateral margin to middle third of flank. On outer third ribs weaken, break down into riblets and striae, and project strongly forward to ventrolateral margin, where they flex back and are feebly convex. They strengthen markedly on shoulder and are coarse and distant on venter, which is conspicuously serrated in profile; ventral ribs approximately twice as numerous as lateral. Ribs weaken markedly over dorsum and reduce to mere low convex folds. Numerous fragments match the type and have whorl heights of up to 19 mm. Variation consists chiefly of differences in strength of flank ornament and density with a rib index of 2.5-3. Venters vary from strongly ribbed and serrate to smooth; dorsums from smooth to delicately ribbed and striate. Somewhat different, but also regarded as intraspecific variations, are weaker ribbed individuals with rib index of up to 4, and a more compressed whorl section (down to 0.6); these in turn connect to nearly smooth variants and those with growth lines and striae only on flank. Suture moderately incised with broad bifid saddles, narrow L, and broad U. Kennedy & Cobban (1996): DESCRIPTION.- Specimens are phosphatized internal molds of body chamber. Whorl section compressed, dorsum broad, feebly convex, dorsal flanks convex, converging ventrally to narrow, tabulate venter. Flanks ornamented by coarse crescentic ribs on dorsal two-thirds of flank, sweeping forward and declining on ventral third of flank, where additional riblets and striae may develop (Figure 3.1 1); rib index 1.5-2. Venter ornamented by coarse transverse riblets, 5 or 6 in distance equal to whorl height (Figure 3.3, 3.9, 3.10). Ward & Kennedy (1993): Description. - Specimens crushed. Shell straight, and expanding slowly. Largest specimen seen has whorl height of 18 mm. Flank ornament of coarse concave crescentic ribs, 2.5-4.0 in a distance equal to whorl height. They are strongest on dorsolateral area, and extend across most of flank, projecting forward and declining toward ventrolateral margin, which may be flanked by shallow groove. Ventrolateral shoulders sharp, venter tabulate. Landman et al. (2004): DESCRIPTION.- The collection includes both robust and slender forms, presumably macroconchs and microconchs, respectively. These differences are expressed in the angle of taper, although this is also very dependent on ontogenetic stage (table 6). The dorsal onehalf of the flanks are covered with broad, asymmetrically crescentic ribs with a rib index of 2–3. The narrow tabulate venter is serrated with a rib index of 6–8. We describe and illustrate 15 specimens to convey the range of variation of our material. AMNH 47418 is a piece of body chamber 49.7 mm long with whorl heights of 15.1 and 17.1 mm at the adapical and adoral ends, respectively (fig. 27F–H). The angle of taper is 3.28. The whorl section at the adoral end is ovoid with maximum width at one-third whorl height both costally and intercostally; the intercostal ratio of whorl width to height is 0.60. The dorsum is very broadly rounded and the dorsolateral shoulder is fairly abruptly rounded. The flanks are broadly rounded and converge to the venter. The narrow, flat venter is bordered by a faint longitudinal groove. The dorsum shows low, convex folds spaced at distances of approximately 5 mm near the adoral end. There are four large, slightly crescentic nodate swellings on the inner two-thirds of the flanks. The swellings become progressively more widely spaced adorally; the distance between the two most adoral swellings is approximately 14 mm; the rib index is approximately 2. The nodes are strongest just ventral of the dorsolateral margin. The venter is covered by coarse, swollen ribs that show a slight forward projection. They gradually become more widely spaced adorally so that the distance between rib crests at the adoral end of the specimen is approximately 4 mm; the rib index is 6. AMNH 47506 is a body chamber fragment 56.9 mm long with whorl heights of 11.7 mm and 13.4 mm at the adapical and adoral ends, respectively (fig. 27Q–T). The angle of taper is 3.08. The ratio of whorl width to height at the adoral end is 0.70. There are low folds on the dorsum. The inner two-thirds of the flanks bear strong crescentic ribs spaced at distances of approximately 10 mm at the adoral end; the rib index is 2.5. The narrow, tabulate venter is ornamented with strong, transverse ribs with a slight adoral projection, producing a serrated appearance; the rib index is 5. AMNH 47409 is a large fragment of a body chamber 58.2 mm long with whorl heights of 16.7 mm and 19.0 mm at the adapical and adoral ends, respectively (fig. 28H– K). The ratio of whorl width to height at the adoral end is 0.72. The whorl section is ovoid with maximum width at one-third whorl height. The dorsum is flat and the dorsolateral margin is fairly sharply rounded. The inner flanks are broadly rounded and the outer flanks converge toward the venter. The venter is set off by a weak, longitudinal furrow and the ventrolateral shoulder is fairly abruptly rounded; the venter is narrow and flat. Weak swellings occur on the dorsal onehalf of the flanks with a distance of 13.5 mm between the two most adoral swellings; the rib index is approximately 2.5. The venter is covered with swollen ribs that show a slight forward projection. The ribs are spaced at distances of 4 mm so that the rib index is approximately 6.5. AMNH 47412 is the adapical part of a body chamber 48.4 mm long (fig. 28L–P). The whorl heights are 14.1 mm and 15.7 mm at the adapical and adoral ends, respectively. The whorl section at the adoral end is pyriform with an intercostal ratio of whorl width to height of 0.73. The angle of taper is 2.28. The dorsum is nearly flat to very broadly rounded and the dorsolateral margin is fairly abruptly rounded. The flanks are broadly rounded with maximum width at one-third whorl height. The outer flanks converge to the venter. The venter is flat and narrow and is bordered by a ventrolateral furrow producing a keel. The ventrolateral shoulder is abruptly rounded. There are very faint, convex folds on the dorsum. Broad, crescentic ribs cover the dorsal one-half of the flanks. On the left side, these ribs are of variable strength and spacing with a rib index of 4, whereas on the right side, these ribs are more nodate with a rib index of 2. Ribs slant strongly forward to the ventrolateral margin. The venter is covered with fairly coarse ribs, which show a weak forward projection, producing a serrated appearance; the rib index is 8. AMNH 47416 is a fragment of a body chamber 45.6 mm long with whorl heights of 13.9 mm and 17.5 mm at the adapical and adoral ends, respectively (fig. 28Q–T). The ratio of whorl width to height at the adoral end is 0.69. Broad, weak crescentic swellings cover the dorsal one-half of the flanks with a rib index of approximately 3. The left side shows a dent near the adapical end, which is probably the result of an injury. The venter is mostly eroded away but shows three swollen transverse ribs on the adoral end. The ribs are spaced at distances of 2 mm so that the rib index is approximately 10. MAPS A2058a4 is a strongly ribbed fragment of a body chamber 59.7 mm long with whorl heights of 15.6 mm and 16.4 mm at the adapical and adoral ends, respectively (fig. 29A–E). The intercostal ratio of whorl width to height at the adoral end is 0.70. The angle of taper is 1.28. There is a shallow, longitudinal groove on either side of a fastigiate to tabulate venter. The dorsum is covered with low folds that show a relatively strong adoral projection. There are broad, asymmetrically crescentic ribs on the dorsal one-half of the flanks with a rib index of 3. The venter is notched with swollen ribs showing a slight adoral projection; the rib index is 5.5. AMNH 47410 is a body chamber fragment with some iridescent shell on the adapical end; the angle of taper is 3.88 (fig. 29F–I). It is 46.5 mm long with whorl heights of 13.4 mm and 15.7 mm at the adapical and adoral ends, respectively. The intercostal ratio of whorl width to height at the adoral end is 0.73. The whorl section is pyriform with a broadly rounded to flat dorsum and fairly sharply rounded dorsolateral margin. The inner flanks are broadly rounded and the outer flanks converge to the venter. The venter is bordered by a faint longitudinal groove. The ventrolateral shoulder is fairly steeply rounded and the venter is narrow and tabulate. Swollen, concave ribs cover the inner onehalf of the flanks. The distance between rib crests is approximately 8 mm near the adoral end so that the rib index is approximately 3. Ribs weaken and break down into riblets on the outer one-third of the flanks. They slant strongly forward at an angle of approximately 208. The ribs strengthen on the venter and are spaced every 2 mm near the adoral end, so that the rib index is approximately 7. AMNH 47511 is a coarsely ornamented fragment of the adapical part of a body chamber 38.8 mm long with whorl heights of 12.5 mm and 15.0 mm at the adapical and adoral ends, respectively (fig. 29J–M). The intercostal ratio of whorl width to height at the adoral end is 0.72. The angle of taper is 4.28. There are low folds on the dorsum. The inner two-thirds of the flanks bear strong, crescentic ribs spaced at distances of approximately 10 mm at the adoral end, so that the rib index is 2.5. The venter is narrow and tabulate and ornamented with strong, transverse ribs that show a slight adoral projection, producing a serrated appearance; the rib index is 5. AMNH 47415 is a small specimen of a body chamber 35.6 mm long, with relatively coarse ornament (fig. 29N–R). The whorl heights are 12.3 mm and 14.1 mm at the adapical and adoral ends, respectively. The intercostal ratio of whorl width to height at the adoral end is 0.75. The angle of taper is 3.68. The inner one-half of the flanks are covered with four slightly crescentic nodelike swellings with the interspaces between them as broad as the swellings themselves. The distance between node crests is 9 mm, so that the rib index is approximately 2.5. The ribs slant strongly forward on the outer one-half of the flanks at an angle of approximately 208. The narrow tabulate venter is covered with swollen, convex ribs spaced at distances of 2.5–3.0 mm, yielding a rib index of 6. AMNH 47413 is a small piece of the adoral part of a phragmocone and the adapical part of a body chamber of a specimen 35.9 mm long (fig. 29V–X). The whorl heights at the adapical and adoral ends are 9.2 mm and 11.9 mm, respectively. The ratio of whorl width to height at the adoral end is 0.75. The angle of taper is 5.28. The inner one-half of the flanks are covered with broad, crescentic ribs with the interspaces between them as broad as the ribs themselves. The distance between rib crests at the adoral end of the specimen is 6 mm; the rib index is approximately 3. The narrow tabulate venter is smooth. AMNH 47504 is a fragment of a body chamber 35.3 mm long with whorl heights of 9.7 mm and 11.0 mm at the adapical and adoral ends, respectively (fig. 29Y–b). The ratio of whorl width to height at the adoral end is 0.79. The angle of taper is 4.08. The dorsal one-half of the flanks bear nodelike swellings with a rib index of approximately 2. The ribs weaken and slant strongly forward on the outer one-half of the flanks. They are transverse on the venter, with a rib index of 6. AMNH 47270 (not illustrated) is a body chamber fragment 55.8 mm long with a whorl height of 22.6 mm at the adoral end. The whorl section is compressed ovoid at the adoral end with a ratio of whorl width to height of 0.75. The dorsum is broad and nearly flat and the dorsolateral shoulder is fairly abruptly rounded. The inner flanks are broadly rounded and nearly parallel and the outer flanks converge toward the venter. The venter is narrow and tabulate and the ventrolateral shoulder is abruptly rounded. There is a shallow longitudinal groove that borders the venter. The dorsum is covered with low, convex folds. The venter is nearly smooth and the dorsal one-half of the flanks bear widely spaced nodelike swellings with a rib index of approximately 2.5. AMNH 47444 is one of the smallest fragments in our collection, a piece of phragmocone, 13.6 mm in length, with whorl heights of 9.9 mm and 10.6 mm at the adapical and adoral ends, respectively (not illustrated). The ratio of whorl width to height at the adoral end is 0.74. There are two nodelike swellings on the inner flanks with a rib index of 2. The ribs are very weak on the tabulate venter with a rib index of 4.5 based on a distance of 3 mm between the two most adoral ribs. MAPS A2058a6 (not illustrated) is a completely septate fragment 63.0 mm long with whorl heights of 16.0 mm and 18.7 mm at the adapical and adoral ends, respectively. The whorl section at the adoral end is compressed ovoid with a ratio of whorl width to height of 0.75. The dorsum is very broadly rounded and the dorsolateral margin is well rounded. The flanks are broadly rounded and converge toward the venter with maximum width at midwhorl height. The venter is bordered by a shallow, longitudinal depression and the ventrolateral shoulder is fairly sharply rounded; the venter is broadly rounded to flat. The inner one-half of the flanks are smooth except for weak, nodelike swellings with a rib index of approximately 2. Broad, transverse ribs cover the venter with a rib index of 7. Parts of the last and next to last suture are illustrated in figure 30B. The sutures are worn but show a bifid L/U, a broad, bifid U, and a narrow I. AMNH 47159 is a fragment of the adapical end of a body chamber 43.4 mm long with whorl heights of 11.2 mm and 13.4 mm at the adapical and adoral ends, respectively (fig. 33U–Y). The ratio of whorl width to height at the adoral end is 0.74. The venter is narrow and nearly flat and is bordered by a longitudinal furrow. There are weak crescentic swellings on the dorsal one-half of the flanks with a rib index of approximately 3. The venter is ornamented with weak, transverse ribs with a rib index of approximately 8. Landman et al. (2007): DESCRIPTION.- The apical angle ranges from 1.9 to 4.5u (table 5). The whorl cross section is compressed ovoid. The intercostal ratio of whorl width to height ranges from 0.68 to 0.77 and the costal ratio of whorl width to height ranges from 0.69 to 0.84 (table 5). These ratios are nearly constant throughout ontogeny. In a plot of whorl width versus height in intercostal section, the y-intercept is approximately 0 (at x 5 0), indicating that the growth of whorl width versus height is nearly isometric (fig. 35). The dorsum is almost flat to very broadly rounded and the dorsolateral margin is fairly abruptly rounded. The inner flanks are broadly rounded with maximum width at one-third whorl height both costally and intercostally. The outer flanks converge to a fastigiate to tabulate venter. The venter is bordered by a shallow, longitudinal groove on each side. The inner one-half of the flanks are covered with weak to strong, slightly crescentic nodate swellings with a rib index of 1.2–2.8. The nodes are particularly well developed in the two largest specimens, MAPS A2058b1 (fig. 29) and AMNH 50766 (fig. 30A–E), but also occur in very small specimens such as AMNH 50771 (fig. 32E–I). In other specimens such as AMNH 50779 (fig. 33N–Q), the nodes are relatively weak. The venter is nearly smooth to strongly ornamented with transverse ribs that cross the venter with a slight adoral projection, producing a serrated appearance; the rib index ranges from 3.5 to 8.5 and averages 6 (table 5). MAPS A2058b1 (fig. 29) and AMNH 50737 (fig. 31I) preserve a mature modification at the aperture. In both instances, there is a short dorsal and long ventral rostrum, each of which tapers gradually to a rounded tip. It is interesting that these two specimens are very different in size, with whorl heights at the aperture of 21.7 and 12.2 mm, respectivey, suggesting that they may represent antidimorphs. One specimen (AMNH 50434), a small fragment with a whorl height of 16.8 mm at the adoral end, contains part of a convex structure inside the adoral end of the body chamber (fig. 32J–N). The structure looks suspiciously like part of a lower jaw (aptychus). It is ornamented with ribs that parallel the outer margin. However, the ribs are not as rugose as those on baculite lower jaws (Landman et al., in press) and, in any event, not enough of the structure is preserved to make a positive identification. The suture shows a bifid E/L, a narrow, bifid L, a broad, bifid L/U, a bifid U, and a narrow I (fig. 34). |
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| Discussion / Comments: | ||||||
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Cobban & Kennedy (1995): TYPE.- The holotype, by monotypy, is no. 72866 in the collection of the Academy of Natural Sciences of Philadelphia, the original of Morton, 1834, plate 13, figure 1, from Prairie Bluff, Alabama. MATERIAL.- Twenty figured specimens (USNM 463 174463 193) and numerous other specimens. DISCUSSION.- Baculites carinatus Morton, 1834 is the earliest available name for widely occurring Eubaculites with a tabulate venter and crescentic flank ribs. The species has been described and discussed at length by Kennedy (1986d, as E. lyelli, and Henderson et al., 1992), who described the intraspecific variation shown by the species, and discussed its synonyms, the most important of which are Baculites lyelli d'orbigny, 1847, based on material from Quiriquina Island, Chile; Baculites tippaensis Conrad, 1858 and B. spillmani Conrad, 1858 originally described from the Owl Creek Formation of Mississippi; plus E. kossmati Brunnschweiler, 1966, E. compressum Brunnschweiler, 1966, and E. multicostatus Brunnschweiler, 1966, originally described from Western Australia. Many references to E. ootacodensis (=E. labyrinthicus herein) actually refer to E. carinatus, as is clear from the synonymy of E. labyrinthicus given above. Presence of a pair of flank tubercles rather than crescentic flank ribs distinguish populations of E. vagina (Forbes, 1846) (see revision in Kennedy and Henderson, 1992b), although smooth variants of the two species may be inseparable. Populations of E. latecarinatus (Brunnschweiler, 1966) have smooth flanks (see revision in Henderson et al., 1992). Eubaculites simplex (Kossmat, 1897) (see revision in Henderson et al., 1992) are very compressed, smooth or with feeble flank undulations, and have a fastigiate to narrowly tabulate venter at a growth stage when E. carinatus invariably possesses a tabulate venter. OCCURRENCE.- Maastrichtian, Prairie Bluff Chalk at localities 2, 5-9, 16, 31, 32, 36, 37, 40 and 44-47. The species also occurs in the Owl Creek Formation in Missouri, Mississippi and Tennessee, Corsicana Formation in northeast Texas, and as remaink fossils at the base of the Hornerstown Sand in New Jersey. There are also records from The Netherlands, southwestern France, northwestern Spain, Austria, Mozambique, Zululand (South Africa), South India, Western Australia, Argentina, Chile and California. Kennedy & Cobban (1996): TYPE.- The holotype, by monotypy, is no. 72866 in the collection of the Academy of Natural Sciences of Philadelphia, the original of Morton, 1834, pl. 13, fig. 1, from Prairie Bluff, Alabama. DISCUSSION.- The present specimens are larger than most individuals of this species from the Owl Creek Formation, Prairie Bluff Chalk and Corsicana Formation (Cobban and Kennedy, 1995, in press; Kennedy and Cobban, 1993), but find a match in individuals of comparable size from the Mira Formation of Western Australia (Henderson et al., 1992). MATERIAL.- Three specimens, USNM 1269la-c, ex J. B. Marcou Collection, labelled 'New Jersey' are, by their preservation, from the base of the Hornerstown. OCCURRENCE.- Maastrichtian base of Hornerstown Formation in New Jersey; Prairie Bluff Chalk of Mississippi and Alabama; Owl Creek Formation in Missouri, Mississippi and Tennessee; Corsicana Formation in northeast Texas. There are also records from the Netherlands, southwestern France, northwestern Spain, Austria, Mozambique, Zululand (South Africa), South India, Western Australia, Argentina, Chile and California. Ward & Kennedy (1993): Type.- Holotype, by monotypy, is No. 72866 in the collections of the Academy of Natural Sciences, Philadelphia, from the Maastrichtian Prairie Bluff Chalk of Alabama. Discussion. - The closely spaced ribbing, extending across the greater part of the flank, separates these specimens from other baculitids in the Biscay fauna, even when the otherwise diagnostic tabulate Eubaculites venter is invisible. The synonymy of the species of Eubaculites is reviewed at length by Kennedy (1987, p. 192) and Henderson et al. (1992), who modified the conclusions of Klinger (1976, p. 83 et seq.). Eubaculites ootacodensis (Stoliczka, 1866) (p. 199, PI. 90, figs. 14, ?I 5) has ribs combined with a fastigiate venter. Eubaculites vagina (Forbes, 1846) (p. 114, PI. 10, fig. 4) has a tabulate venter, but is bituberculate. Eubaculites latecarinatus (Brunnschweiler, 1966) (p. 33, Pl. 3. figs. 13, 14, Pl. 4, figs. 11-14, text-fig. 20) has a serrated tabulate venter and smooth flanks. Occurrence.- In the Biscay sections this taxon is restricted to Member IV (upper Maastrichtian). Elsewhere, the species occurs in both lower and upper Maastrichtian, where well dated, with records from northern Spain, the Pyrénées-Atlantiques and Petites- Pyrénées, Haute Garonne in France, northern Spain, the Netherlands, Neuberg, Steiermark, Austria, Zululand, South Africa, south India, western Australia, Argentina, and Chile. Landman et al. (2004): TYPE.- The holotype, by monotypy, is ANSP 72866, the original of Morton, 1834: pl. 13, fig. 1, from the Maastrichtian Prairie Bluff Chalk of Alabama. MATERIAL.- There are 77 specimens, 5 of which are float, from the upper part of the New Egypt Formation and basal part of the Hornerstown Formation, AMNH loc. 3345, Parkers Creek, northeastern Monmouth County, New Jersey, and 1 specimen (AMNH 47159) from 1.5–2 m below the base of the Hornerstown Formation, AMNH loc. 3346, just upstream from AMNH loc. 3345. All of the specimens are internal molds of fragments less than 75 mm in length. A few specimens retain the original shell material of the septa. There are many more body chamber pieces than phragmocone pieces— there are only four completely septate fragments (5% of the total). DISCUSSION.- This species is characterized by a narrow, tabulate venter ornamented with ribs producing a serrated appearance, and broad, asymmetrically crescentic ribs on the dorsal one-half of the flanks. The full range of variation of this species has been recently discussed by Klinger and Kennedy (1993), Cobban and Kennedy (1995), and Kennedy and Cobban (2000). OCCURRENCE.- This species occurs in New Jersey in the upper part of the New Egypt Formation and as reworked material at the base of the Hornerstown Formation, near Eatontown, northeastern Monmouth County; at the top of the New Egypt Formation in the Crosswicks Creek Basin, southwestern Monmouth County (Landman et al., in prep. b); and in the New Egypt Formation at the Inversand Pit, near Sewell, Gloucester County (Kennedy and Cobban, 1996). It also occurs at the top of the Tinton Formation and as reworked material at the base of the Hornerstown Formation near Freehold, central Monmouth County (Landman et al., in prep. a). Kennedy and Cobban (1996: fig. 3.1–3.3, 3.7–3.12) recorded three specimens of this species (USNM 12691a–c), ex J.B. Marcou collection, labeled ‘‘New Jersey’’, which they inferred to be from the base of the Hornerstown Formation. This species is reported elsewhere on the Gulf and Atlantic Coastal Plains from the top of the Corsicana Formation and as reworked material at the base of the Kincaid Formation, Falls County, Texas (Kennedy et al., 2001); the Owl Creek Formation, Mississippi, Missouri, and Tennessee (Kennedy and Cobban, 2000); the Prairie Bluff Chalk, Alabama and Mississippi (Cobban and Kennedy, 1995); and the Severn Formation, Maryland (Kennedy et al., 1997; Landman et al., 2004). It is also reported from southeast France, Austria, the Netherlands, Zululand (South Africa), Mozambique, Madagascar, southern India, Western Australia, Chile, Argentina, and California. It ranges from the upper lower to the upper upper Maastrichtian (Klinger et al., 2001). Landman et al. (2007): TYPE,- The holotype, by monotypy, is ANSP 72866, the original of Morton, 1834: pl. 13, fig. 1, from the Maastrichtian Prairie Bluff Chalk of Alabama. MATERIAL.- Approximately 50 specimens in the AMNH collections and 55 specimens in the MAPS collections from the upper part of the Tinton Formation, mainly the Pinna Layer, and, more rarely, as reworked material at the base of the Hornerstown Formation, Manasquan River Basin, central Monmouth County. The majority of specimens consist of fragments of body chambers, nearly all of which are uncrushed. Most specimens are juveniles and range in length from 20 to 60 mm (fig. 35), but two specimens, probably parts of adults, are exceptionally long with lengths of 117 and 141 mm. Specimens in the Pinna Layer sometimes occur in clusters (fig. 6E), which are probably biological in origin. DISCUSSION.- The taphonomy of these specimens evidently favored gross ornament over fine ornament. Thus, delicate growth lines are missing but large nodes are well preserved. The fact that two specimens retain mature modifications at the aperture suggests that these animals lived nearby and did not suffer much postmortem transport. This is consistent with the observation that many specimens occur in monospecific clusters that may be related to group feeding or the result of nearly simultaneous death after spawning or mating. With the exception of one specimen (AMNH 51327) that bears a single thread of a bryozoan colony, there are no epizoans. As summarized by Klinger and Kennedy (2001: 62), the adult size of this species in North America and Europe is much smaller than that in Argentina and Zululand. The maximum whorl height of a specimen from the Manasquan River Basin is 25.4 mm whereas the maximum whorl heights of specimens from Argentina and Zululand are approximately 90 mm. OCCURRENCE.- Top of the Tinton Formation, mainly the Pinna Layer, and, rarely, as reworked material at the base of the Hornerstown Formation, Manasquan River Basin, central Monmouth County, New Jersey. Elsewhere in New Jersey, this species occurs in the upper part of the New Egypt Formation and as reworked material at the base of the Hornerstown Formation, near Eatontown, northeastern Monmouth County (Landman et al., 2004b); the top of the New Egypt Formation in the Crosswicks Creek Basin, southwestern Monmouth County (Landman et al., in prep.); and the New Egypt Formation and as reworked material at the base of the Hornerstown Formation at the Inversand Pit, near Sewell, Gloucester County (Kennedy and Cobban, 1996). Kennedy and Cobban (1996: fig. 3.1–3.3, 3.7–3.12) recorded three specimens of this species (USNM 12691a–c), ex J.B. Marcou collection, labeled ‘‘New Jersey,’’ which they inferred to be from the base of the Hornerstown Formation. Elsewhere on the Atlantic Coastal Plain, this species occurs in the Severn Formation, Prince Georges County, Maryland (Kennedy et al., 1997), and Anne Arundel County, Maryland (Landman et al., 2004a). On the Gulf Coastal Plain, this species is reported from the top of the Corsicana Formation and as reworked material at the base of the Kincaid Formation, Falls County, Texas (Kennedy et al., 2001); the Owl Creek Formation, Mississippi, Missouri, and Tennessee (Kennedy and Cobban, 2000); and the Prairie Bluff Chalk, Alabama and Mississippi (Cobban and Kennedy, 1995). Klinger and Kennedy (2001) and Klinger et al. (2001) reported it from southeast and southwest France, northern Spain, Austria, the Netherlands, Zululand (South Africa), Mozambique, Madagascar, South India, Western Australia, Chile, Argentina, and California. It ranges from the upper lower to the upper upper Maastrichtian (Klinger et al., 2001). Henderson et al. (1992: 153) noted that this species was widely distributed but did not generally range beyond low to midlatitudes. They remarked that ‘‘it is a useful indicator of middle to late Maastrichtian age and represents the last widely distributed heteromorph taxon to appear in the stratigraphic record.’’ |
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| Systematics: | ||||||
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38 Ordo Ammonoidea Subordo Ancyloceratina Superfamilia Turrilitaceae Familia Baculitidae Genus Eubaculites Species Eubaculites carinatus 44 Classis Cephalopoda Subclassis Nautiloidea Ordo Ammonoidea Subordo Ancyloceratina Superfamilia Turrilitaceae Familia Baculitidae Species Eubaculites carinatus 45 Classis Cephalopoda Subclassis Nautiloidea Ordo Ammonoidea Subordo Ancyloceratina Superfamilia Scaphitaceae Superfamilia Turrilitaceae Familia Baculitidae Familia Scaphitidae Genus Eubaculites Species Eubaculites carinatus 46 Ordo Ammonoidea Subordo Ancyloceratina Superfamilia Turrilitaceae Familia Baculitidae Genus Eubaculites Species Eubaculites carinatus 48 Ordo Ammonoidea Subordo Ancyloceratina Superfamilia Turrilitaceae Familia Baculitidae Genus Eubaculites Species Eubaculites carinatus |
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| Synonym list: | ||||||
| Cobban & Kennedy (1995): 1834 Baculites carinatus Morton. - Morton : p.44 pl. 13; fig. 1
1847 Baculites lyelli d'Orbigny. - d'Orbigny : pl. 1; fig. 3-7
1858 Baculites tippaensis Conrad. - Conrad : p.334 pl. 35; fig. 27
1858 Baculites spillmani Conrad. - Conrad : p.335 pl. 35; fig. 24
1986 Eubaculites lyelli d'Orbigny. - Kennedy : p.195 pl. 27, fig. 3-8;
pl. 32, fig. 13, 14 [with full synonymy]
1992 Eubaculites carinatus Morton. - Kennedy & Henderson : p.714 text-fig. 5A-C
1992 Eubaculites carinatus Morton. - Henderson et al. : p.150 fig. 6F, G, 14-16, 17A-C, G-J, 18, 19 [with additional synonymy]
1993 Eubaculites carinatus Morton. - Ward & Kennedy : p.53 fig. 43.8, 43.9, 43.13
1993 Eubaculites carinatus Morton. - KLINGER & Kennedy : p.218 fig. 7a-e, 21-30, 31a-g, 32-35, 36e-f, 37-38, 42a, 52g-h
1995 Eubaculites carinatus Morton. - Cobban & Kennedy : p. 21, 22, 24, 25, 2 fig. 14.1, 14.5-14.7, 15.4, 15.6-15.8, 16.13-16.15, 16.23, 16.24, 16.28-16.30, 17.52-17.59, 18.1-18.44
Kennedy & Cobban (1996): 1834 Baculites carinatus Morton. - Morton : p.44 pl. 13; fig. 1
1992 Eubaculites carinatus Morton. - Kennedy & Henderson : p.714 text-fig. 5a-c
1992 Eubaculites carinatus Morton. - Henderson et al. : p.150 fig. 6f, g, 14-16, 17a-c, g-j, 18, 19 [with additional synonymy]
1993 Eubaculites carinatus Morton. - Ward & Kennedy : p.53 fig. 43.8, 43.9, 43.13
1993 Eubaculites carinatus Morton. - KLINGER & Kennedy : p.218 fig. 7a-e, 21-30, 31a-g, 32-35, 36e-f, 37-38, 42a, 52g-h
1995 Eubaculites carinatus Morton. - Cobban & Kennedy : p.26 fig. 14.1, 14.5-14.7, 15.4, 15.6-15.18, 16.13-16.15, 16.23, 16.24, 16.28-16.30, 17.52-17.59, 18.1-18.44
1996 Eubaculites carinatus Morton. - Kennedy & Cobban : p.801 fig. 3.1-3.3, 3.7-3.12
Ward & Kennedy (1993): 1834 Baculites carinatus Morton. - Morton : p.34 pl. 13; fig. 1
1847 Baculites lyelli d'Orbigny. - d'Orbigny : pl. 1; fig. 3-7
1986 Baculites lyelli d'Orbigny. - Kennedy : p.1016 pl. 1, fig. 1-3;
pl. 2, fig. 3-8, 13-21 (with full synonymy)
1986 Baculites lyelli d'Orbigny. - Kennedy : fig. 10C, D
1986 Baculites lyelli d'Orbigny. - Stinnesbeck : p.207 pl. 9, fig. 6-9;
text-fig. 24D
1987 Baculites lyelli d'Orbigny. - Kennedy : p.195 pl. 27, fig. 5-8;
pl. 32, fig. 13, 14
1992 Eubaculites carinatus Morton. - Henderson et al. : p.150 fig. 6f, g, 14-20 (with additional synonymy)
1993 Eubaculites carinatus Morton. - Ward & Kennedy : p.50 fig. 43.8, 43.9, 43.13
Landman et al. (2004): 1834 Baculites carinatus Morton. - Morton : p.44 pl. 13; fig. 1
1847 Baculites lyelli d'Orbigny. - d'Orbigny : pl. 1; fig. 3-7
1858 Baculites tippaensis Conrad. - Conrad : p.334 pl. 3; fig. 27
1858 Baculites spillmani Conrad. - Conrad : p.335 pl. 35; fig. 24
1924 Baculites sheromingensis Crick. - Crick : p.139 pl. 9; fig. 1-3
1987 Eubaculites lyelli d'Orbigny. - Kennedy : p.195 pl. 27, fig. 5-8;
pl. 32, fig. 13, 14 [with full synonymy]
1993 Eubaculites carinatus Morton. - KLINGER & Kennedy : p.218 text-fig. 7a-e, 21-30, 31a-g, 32-35, 36e, f, 37, 38, 42a, 52g, h
2000 Eubaculites carinatus Morton. - Kennedy & Cobban : p.180 pl. 2, fig. 1-23, 27, 28;
text-fig. 3, 4 [with additional synonymy]
2001 Eubaculites carinatus Morton. - Kennedy et al. : p.168 fig. 4a, e
2004 Eubaculites carinatus Morton. - Landman et al. : p. 58, 60, 62, 64, 7 fig. 27-29; 30A, B; 33U-Y
Landman et al. (2007): 1834 Baculites carinatus Morton. - Morton : p.44 pl. 13; fig. 1
1847 Baculites lyelli d'Orbigny. - d'Orbigny : pl. 1; fig. 3-7
1858 Baculites tippaensis Conrad. - Conrad : p.334 pl. 3; fig. 27
1858 Baculites spillmani Conrad. - Conrad : p.335 pl. 35; fig. 24
1924 Baculites sheromingensis Crick. - Crick : p.139 pl. 9; fig. 1-3
1987 Eubaculites lyelli d'Orbigny. - Kennedy : p.195 pl. 27, fig. 5-8;
pl. 32, fig. 13, 14 [with full synonymy]
1993 Eubaculites carinatus Morton. - KLINGER & Kennedy : p.218 text-fig. 7a-e, 21-30, 31a-g, 32-35, 36e, f, 37, 38, 42a, 52g, h
2000 Eubaculites carinatus Morton. - Kennedy & Cobban : p.180 pl. 2, fig. 1-23, 27, 28;
text-fig. 3, 4 [with full synonymy]
2001 Eubaculites carinatus Morton. - Kennedy et al. : p.168 fig. 4a, e
2004 Eubaculites carinatus Morton. - Landman et al. : p.35 fig. 15P, Q
2004 Eubaculites carinatus Morton. - Landman et al. : p.55 fig. 27-29, 30A, B, 33U-Y
2007 Eubaculites carinatus Morton. - Landman et al. : p. 65, 66, 67, 68, 6 fig. 29-35
|
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| Stratigraphy - relative ages: | ||||||
| upper Maastrichtian - lower Maastrichtian: Ward & Kennedy (1993) Maastrichtian: Cobban & Kennedy (1995) Maastrichtian: Kennedy & Cobban (1996) |
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| Specimen: | ||||||
| Academy of Natural Sciences - Philadelphia, Inventory number: No. 72866 |
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| References: | ||||||
Morton,S.G.. (1834): d'Orbigny,A. (1847): Conrad,T.A.. (1858): Crick,G.C.. (1924): Stinnesbeck,W.. (1986): Kennedy,W.J.. (1986): Kennedy,J.W.. (1986): Kennedy,W.J.. (1986): Kennedy,W.J.. (1987): Henderson,R.A..; Kennedy,W.J.. and McNamara,K.J.. (1992): Kennedy,W.J.. and Henderson,R.A.. (1992): KLINGER,H.C.. and Kennedy,W.J.. (1993): Ward,P.D.. and Kennedy,W.J.. (1993): Cobban,W.A.. and Kennedy,W.J.. (1995): Kennedy,W.J.. and Cobban,W.A.. (1996): Kennedy,W.J.. and Cobban,W.A.. (2000): Kennedy,W.J..; GALE,A.S.. and HANSEN,T.A.. (2001): Landman,N.H..; Johnson,R.O.. and Edwards,L.E.. (2004): Landman,N.H..; Johnson,R.O.. and Edwards,L.E.. (2004): Landman,N.H..; Johnson,R.O..; Garb,M.P..; Edwards,L.E.. and Kyte,F.T.. (2007): |
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| Anonymous: Unedited TaxonConcept data | ||||||
 This work is licensed under a Creative Commons Attribution 2.5 License. | ||||||
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Taxon relations
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