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Species Globoconella puncticulata Deshayes 1832


Discussion / Comments:
Chaisson & Pearson (1997):
Gc. puncticulata does not appear at this tropical site until late (Sample 154-925B-10H-5, 65-67 cm, in the middle Pliocene) in its global range (Kennett and Srinivasan, 1983). Because this site is outside the usual geographic range of Gc. puncticulata it is not surprising that irregular morphotypes are observed. In Sample 154-925B-10H-5, 65-67 cm, many specimens of Gc. puncticulata resemble T. crassaformis. Gc. puncticulata may be distinguished by its larger aperture, which gradually widens toward the spiral side. The apertural face of Gc. puncticulata is rounded, while that of T. crassaformis is generally flat. The final chamber of a T. crassaformis specimen is more inflated than earlier chambers, causing it to rise higher from the umbilicus. Gc. puncticulata gives rise to Gc. inflata in the late Pliocene (Kennett and Srinivasan, 1983). In the tropical region early Gc. inflata takes the form of "Gc. triangula." If the late Pliocene to early Pleistocene range of Gc. triangula is added on to the range of Globorotalia inflata in the tropics, it is equivalent to the range of Gr. inflata in the higher latitudes (Weaver and Raymo, 1989). In Sample 154-925B-7H-5, 65-67 cm, forms transitional between Gc. puncticulata and Gc. triangula are observed.
Synonym list:
Chaisson & Pearson (1997):
1832 Globigerina puncticulata Deshayes. - Deshayes : p. 170
1960 Globigerina puncticulata Deshayes. - Banner & Blow : p. 15 pl. 5 figs. 7a-c
1983 Globorotalia (Globoconella) puncticulata Deshayes. - Kennett & Srinivasan : p. 116 pl. 27, figs. 4-6
1997 Globoconella puncticulata Deshayes. - Chaisson & Pearson : Plate 2, Figs. 12, 13
References:

Deshayes,G.P. (1832):
Encyclopédie méthodique: Histoire naturelle des vers. tome 2(no 2) p. 145-594

Banner,F.T. and Blow,W.H. (1960):
Some primary types of species belonging to the superfamily Globigerinaceae . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 11(1) p. 1-41

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Chaisson,W.P. and Pearson,P.N. (1997):
Planktonic foraminifer biostratigraphy at Site 925: middle Miocene–Pleistocene.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 154 Eds: Shackleton, N.J.Curry, W.B.Richter, C.Bralower, T.J.
Anonymous: Unedited TaxonConcept data
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