Conoglobigerina terquemi Iovceva & Trifonova 1961 from: Boudagher-Fadel, M.K.Banner, F.T.Whittaker, J.E.Simmons, M.D. (1997): Early Evolutionary History of Planktonic Foraminifera. Vol. 1 | . |
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Species Conoglobigerina terquemi Iovceva & Trifonova 1961 |
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| Discussion / Comments: |
Boudagher-Fadel et al. (1996):
Remarks: The specimens which formed the
primary types of this species were found by its
authors to occur with the primary types of C.
conica (q.v.), and it is likely that all the specimens
were glauconitic moulds. Like C. conica, the
chambers were drawn (op. cit., above) to be
subglobular, with four abutting the umbilicus; the
aperture is an intraumbilical arch, as broad as
the narrow umbilicus itself. It is possible that
the original authors' drawings show a bulla on the
holotype (1961, pI. 2, fig. 10) and the remains of
a bulla on the figured paratype (1961, pI. 2, fig.
13; reproduced here as our Figure 2.1; 1).
However, the spire is very low (height/diameter
ratio of 0.6, compared to the height/diameter ratio
for C. conica of about 1.2), and only five chambers
were drawn to comprise the first whorl of
both the holotype and the figured paratype. As
remarked above (C. conica) , the early whorls
would be clearly visible in a galuconitic mold. It
is possible (as suggested by Banner and Desai, 1988, p. 147) that C. terquemi is the megalospheric
partner of its contemporary C. conica. If
this is so, these taxa would comprise the stratigraphically
youngest example of dimorphism in
meroplanktonic Conoglobigerina. |
| Systematics: |
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Subordo Globigerinina
Superfamilia Favusellacea
Familia Conoglobigerinidae
Genus Conoglobigerina
Species Conoglobigerina terquemi
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| Synonym list: |
Boudagher-Fadel et al. (1997):
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| References: |
Iovceva,P.. and Trifonova,E.. (1961):
Tithonian Globigerina from northwest Bulgaria . Trudove Varkhu Geologiyata na Bulgariya, (Seriya Paleontologiya) Vol. 3 p. 343-347
Boudagher-Fadel,M.K.; Banner,F.T.; Gorbatchik,T.K.; Simmons,M.D. and Whittaker,J.E. (1996):
Evolution in the Early Cretaceous planktonic foraminiferal genus Blefuscuiana . Jahrbuch für Geologie und Paläontologie, Abhandlungen Vol. 202 p. 243-258
Boudagher-Fadel,M.K.; Banner,F.T.; Whittaker,J.E. and Simmons,M.D. (1997):
Early Evolutionary History of Planktonic Foraminifera. Vol. 1
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