Saghalinites cala Forbes 1946 from: Ifrim, C..Stinnesbeck, W..López-Oliva, J.G.. (2004): Maastrichtian cephalopods from Cerralvo, north-eastern Mexico . Palaeontology Vol. 47(6) p. 1575–1627 | . |
Notice: This catalogue page may contain unedited data.
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Species Saghalinites cala Forbes 1946 |
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[1] Text-fig. 3K Ifrim et al. (2004) [2] Text-fig. 5C Ifrim et al. (2004)
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| Diagnosis / Definition: |
Ifrim et al. (2004):
Description: Small evolute test with low expansion rate. The rounded whor1 section is litt1e depressed (WB/WH is
1·16) with the greatest breadth below mid-flank. The wide, shallow umbi1icus spans 46 per cent of the whor1 diameter.
The umbilica1 wall is short, but steep to vertical. Flanks are rounded and grade into a broad1y rounded venter. The
smooth surface displays five narrow, deep constrictions per whorl. They arise at the umbi1ica1 seam, pass straight and
prorsiradiate1y across the umbilica1 wall and inner flank, and flex gently backward on the outer flank. On the venter
constrictions form a shallow sinus. The suture line is tetragonitid with astout 1anceo1ate median sadd1e in the deep external Iohe, trifid E/L and LlU and irregu1ar1y bifid L. The suspensive lobes are retracted. |
| Discussion / Comments: |
Ifrim et al. (2004):
Type: The 1ectotype BMNH C51057 is Forbes' original from southern India (1846, p.104, pl. 8, fig. 4a-c) by
subsequent designation of Kennedy and K1inger (1977, p. 169).
Material: One well preserved interna1 mou1d.
Remarks: Saghalinites wrighti Birkelund is a species close to S. cala. They are almost indistinguishable,
particularly during small growth stages. However, S. wrighti lacks constrictions in earliest growth stages
while in later growth stages constrictions are straight rather than flexuous. Saghalinites wrighti has been
described by Birkelund (1965) and Kennedy and Klinger (1977), and its holotype was figured again by
Ward and Kennedy (1993, fig. 20). |
| Systematics: |
36
Ordo Ammonoidea
Subordo Lytoceratina
Superfamilia Tetragonitaceae
Familia Tetragonitidae
Subfamilia Tetragonitinae
Genus Saghalinites
Species Saghalinites cala
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| Synonym list: |
Ifrim et al. (2004):
1977 Saghalinites cala Forbes. - Kennedy & KLINGER : p.168 figs. 10a-b, 11a-b, 12d-g, 13a-b, e-k, ?c-d, 14a-f, 15a-f (with full synonymy)
1992 Saghalinites cala Forbes. - Kennedy & Henderson : p.400 pl. 2, figs. 13-15; pl. 3, figs. 1-6; text-fig. 3b (with addidtional synonymy)
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| Stratigraphy - relative ages: |
Maastrichtian ? upper Santonian: Ifrim et al. (2004)
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| References: |
Forbes,E.. (1846):
Report on the Cretaceous fossil invertebrates from southern India, collected by Mr. Kaye and Mr. Cunliffe . Transactions of the Geological Society of London Vol. 2(7) p. 97–174
PERVINQUIERE,L.. (1907):
Etudes de paleontologie tunisienne I: Cephalopodes des terrains secondaires.
In: Carte Geologique de Tunisie p. 438 pp
SHIMIZU,S.. (1935):
The Upper Cretaceous cephalopodes of Japan, part 1. . Journal of the Shanghai Science Institute Vol. 2(2) p. 159-226
COLLIGNON,M.. (1956):
Ammonites neocretacees du Menabe (Madagascar) IV. - Les Phylloceratides; V. - Les Gaudryceratides; VI. - Les Tetragonitidae. . Annales Geologiques du Service des Mines de Madagascar Vol. 23 p. 1-106
Howarth,M.K.. (1958):
Upper Jurassie and Cretaceous ammonite faunas of Alexander Land and Graham Land . Scientific Reports ofthe Falkland Islands Survey Department Vol. 21 p. 1-16
Kennedy,W.J.. and KLINGER,H.C.. (1977):
Cretaceous faunas from Zululand and Natal, South Africa. The ammonite family Tetragonitidae Hyatt, 1900 . Annals of the South African Museum Vol. 73 p. 149-197
Kennedy,W.J.. and Henderson,R.A.. (1992):
Non-heteromorph ammonites from the Upper Maastrichtian of Pondicherry, south India . Palaeontology Vol. 35 p. 381-442
Ifrim,C..; Stinnesbeck,W.. and López-Oliva,J.G.. (2004):
Maastrichtian cephalopods from Cerralvo, north-eastern Mexico . Palaeontology Vol. 47(6) p. 1575–1627
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