TaxonConcept: Clavihedbergella subdigitata Carman 1929 from: Pflaumann, U.Krasheninnikov, V.. (1977): Early Cretaceous planktonic foraminifers from eastern North Atlantic, DSDP Leg 41 . In: Initial Reports of the Deep Sea Drilling Project 41 , Abidjan, Ivory Coast, to Malaga, Spain, February-April 1975 Eds: Gardner, J..Herring, J.. p. 539-564

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Clavihedbergella subdigitata Carman 1929 from: Pflaumann, U.Krasheninnikov, V.. (1977): Early Cretaceous planktonic foraminifers from eastern North Atlantic, DSDP Leg 41 . In: Initial Reports of the Deep Sea Drilling Project 41 , Abidjan, Ivory Coast, to Malaga, Spain, February-April 1975 Eds: Gardner, J..Herring, J.. p. 539-564

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Species Clavihedbergella subdigitata Carman 1929

Discussion / Comments:

Pflaumann & Krasheninnikov (1977):
Six to eight radially elongate chambers form the last coil. In the lower part of the species range only the last chamber is distinctly elongate. Umbilicus is wide, coiling is very slightly trochospiral. In peripheral view the chambers are slightly compressed. From Hedbergella bollii Longoria, it differs in the closer arrangement and the more clavate outline of the chambers. From C. subcretacea, it differs in the less rapid prolongation of the chambers and the less deeply lobulate periphery. Hedbergella maslakovae has a similar umbilicus, but the chambers are less elongate. H. semielongata has fewer chambers in the last whorl. Specimens with radially elongated chambers six in the last whorl, the last°two or three digitate, but with not as deeply lobulated periphery as given for H. subcretacea (Tappan) have been encountered in Hole 369A, Sections 46-2, 3, 4, and 47-5 in small specimens. These samples are believed being of upper Aptian age. Our specimens resemble to the figure given by Kuhry (1971, pi. 2, fig. 1) as Hedbergella sp. aff. Ticinella digitalis Sigal, but have a narrower umbilicus.

Systematics:

22
Genus Clavihedbergella
Species Clavihedbergella subdigitata

Synonym list:

Pflaumann & Krasheninnikov (1977):

1929 Globigerina subdigitata Carman. - Carman : p.315 pl. 34; fig. 4, 5

1971 Clavihedbergella subcretacea Tappan. - Caron : p.148 fig. 6

References:

Carman,K.W. (1929):
Some foraminifera from the Niobara and Benton formations of Wyoming . Journal of Paleontology Vol. 3 p. 309-315

Caron,M. (1971):
Quelques cas d'instabilité des caractères génériques chez les foraminifères planctoniques de PAlbien: Second Plankt. Conf. Proc. Vol. 1 p. 145

Pflaumann,U. and Krasheninnikov,V.. (1977):
Early Cretaceous planktonic foraminifers from eastern North Atlantic, DSDP Leg 41 .
In: Initial Reports of the Deep Sea Drilling Project 41 , Abidjan, Ivory Coast, to Malaga, Spain, February-April 1975 Eds: Gardner, J..Herring, J.. p. 539-564

Anonymous: Unedited TaxonConcept data

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