Acarinina aspensis Colom 1954 (TaxonConcept

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Species Acarinina aspensis Colom 1954

Diagnosis / Definition:

Pearson et al. (2006):
DESCRIPTION. Type of wall: Normal perforate, non-spinose with coarse muricae. Test morphology: Low trochospiral, variable number of subglobular chambers (ranging from 6-8, rarely to 10) in last whorl; intercameral sutures radial, moderately depressed between weakly embracing chambers; umbilicus deep, wide as a result of relatively lax/evolute coiling, no circum-umbilical concentration of muricae; 2-2 1/2 whorls on spiral side; intercameral sutures weakly recurved between early chambers, straight, radial between later chambers; rounded periphery in edge view with no evidence of circumperipheral concentration of muricae; aperture interiomarginal, umbilical-extraumbilical, extending to peripheral margin in last chamber. Size: Dimensions of holotype unknown; this is, however, a relatively large form that can exceed 0.5 mm in maximum diameter.

Discussion / Comments:

Pearson et al. (2006):
DISTINGUISHING FEATURES.- This taxon is distinguished by its large and widely open umbilicus and high but variable number (6-8; rarely to 10) of chambers in the last whorl. DISCUSSION.- In comparison to Acarinina pentacamerata, A. aspensis is characterized by an increase in the number of chambers in the final whorl, a more evolute spire and concomitant increase in the width of the umbilicus. This form was originally described from the lower Eocene of Spain, at which time a large number of specimens were illustrated but no holotype designated. Blow (1979, p. 909) designated the specimen illustrated by Colom (1954, pl. 3: fig. 16, reillustrated on P1. 9.4, Fig. I) as a lectotype, perpetuating the taxonomic concept of this form established by Bolli (1957a, p. 167-168, pl. 37, figs. 18a-c). PHYLOGENETIC RELATIONSHIPS.- Bolli (1957b, p. 167) suggested derivation of aspensis from angulosa. Berggren (1964) and Blow (1979) suggested instead that it evolved from pentacamerata, a view which we uphold here. STRATIGRAPHIC RANGE.- Confirmed occurrences only in the lower part of Zone E7. Our studies suggest that aspensis may prove to be a very useful biostratigraphic marker. Some previous authors, since Bolli (1 957b, p. 167) have probably confused aspensis with cuneicamerata and hence suggested a much longer stratigraphic range, into the middle Eocene (see also Berggren 1977, p. 259 and Blow, 1979, p. 91 1). GEOGRAPHIC DISTRIBUTION.- Widespread in (sub)tropical regions of the world; not reliably reported (to our knowledge) from austral or boreal regions. STABLE ISOTOPE PALEOBIOLOGY.- No data available. REPOSITORY.- Lectotype (Blow, 1979, p. 909) reported to be in the personal collection of G. Colom.

Systematics:

35
Ordo Foraminiferida
  Superfamilia Globigerinaceae
   Familia Truncorotaloididae
    Genus Acarinina
     Species Acarinina aspensis

Synonym list:

Pearson et al. (2006):

1954 Globigerina aspensis Colom. - Colom : p.151 pl. 3, fig. 1-35 (flattened forms); pl. 4, fig. 1-31 (trochoid forms) (No holotype designated; lectotype, pl. 3: fig. 16 selected by Blow, 1979:908); [Upper Ypresian - Lower Lutetian, Aspe, Alicante, Spain.]

1956 Acarinina pentacamerata acceleratoria Khalilov. - Khalilov : p.253 pl. 5; fig. 7a-c [lower Eocene, north-eastern Azerbaidjan]

1957 Globorotalia aspensis Colom. - Bolli : p. 167-168 pl. 37; fig. 18a-c [Lower Eocene Globorotalia palmerae Zone, Navet Fm., Trinidad]

1961 Globigerina aspensis Colom. - Bermudez : p. 1157-1157 pl. 1; fig. 2a-c [Lower Eocene, Universidad Fm., Havana Province, Cuba]

1961 Globigerina colomi Bermudez. - Bermudez : p.1167 pl. 2; fig. 6a-c [lower Eocene, Universidad Fm., Cuba]

1965 Acarinina aspensis Colom. - Hillebrandt : p.340 pl. 5; fig. 8, 12, 13 [Lower Eocene G. palmerae Zone, Alicante, Spain]

1968 Turborotalia? (Acarinina) aspensis Colom. - Samuel & Salaj : p.162 pl. 18; fig. 4 [Eocene, Carpathian Mountains, Slovakia]

1979 Turborotalia (Acarinina) aspensis Colom. - Blow : p. 908-911 pl. 148, fig. 7-9; pl. 153, fig. 5-6; pl. 157, fig. 1-6; pl. 165, fig. 5-6; pl. 203, fig. 6 [Zones P9-P1 0, Kane 9-C piston core, Endeavour seamount, North Atlantic Ocean]

1995 Acarinina aspensis Colom. - Lu & Keller : pl. 3; fig. 16-18 [lower Eocene, DSDP Site 577, Shatsky Rise, northwest Pacific Ocean]

1995 Acarinina aspensis Colom. - Poag & Commeau : pl. 2; fig. 28-29 [lower Eocene, Hammond Core, Maryland]

2006 Acarinina aspensis Colom. - Pearson et al. : p.270 pl. 9.4; fig. 1-16 (Pl. 9.4, Fig. 1 : reillustration of lectotype of Globigerina aspensis Colom)

References:

Colom,G. (1954):
estudios de las biozonas con foraminiferos del Terciario del Alicante . Bol. Esp. Inst. Geol. y Minero Vol. 66 p. 1-279

Khalilov,D.M. (1956):
O pelagicheskoy faune foraminifer Paleogenovykh otlozheniy Azerbaydzhana . Trudy Instituta Geologii, Akademiya Nauk Azerbaydzhanskoy SSR Vol. 17

Bolli,H.M. (1957):
Planktonic Foraminifera from the Eocene Navet and San Fernando formations of Trinidad, B.W.I. . Bull. U.S. natl. Mus. Vol. 215 p. 155-172

Bermudez,P.J. (1961):
Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleocene-Reciente).
In: Boletino Geologia (Venezuela), Special Publicacion Vol. 3

Hillebrandt,v.A.. (1965):
Los foraminiferos planctonicos, nummulitidos y coccolitoforidos de la zona de Globorotalia palmerae del Cuisiense (Eoceno Inferior) en el SE de Espania, (provincias de Murcia y Alicante) . Revista Espanola de Micropaleontologia Vol. 8 p. 323-394

Samuel,O.. and Salaj,J. (1968):
Microbiostratigraphy and Foraminifera of the Slovak Carpathian Paleogene . Geologicky Ustav Dionyza Stura, Bratislava p. 232

Blow,W.H. (1979):
The Cainozoic Globigerinida. 3 Vols p. 1413 pp

Lu,G. and Keller,G. (1995):
Planktic Foraminiferal Faunal Turnovers in the Subtropical Pacific during the Late Paleocene to Early Eocene . Journal of Foraminiferal Research Vol. 25 p. 97-116

Poag,C.W.. and Commeau,J.A.. (1995):
Paleocene to middle Miocene planktic foraminifera of the southwestern Salisbury Embayment, Virginia and Maryland: biostratigraphy, allostratigraphy, and sequence stratigraphy . Journal of Foraminiferal Research Vol. 25 p. 134-155

Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006):
Atlas of Eocene Planktonic Foraminifera. p. 1-513

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