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Species Hedbergella simplicissima Magné & Sigal 1954


Discussion / Comments:
Pflaumann & Krasheninnikov (1977):
We have encountered the same variability of the species from subelongate to clavate chambers as figured by Loeblich and Tappan (1961) sub Hedbergella amabilis. As Hedbergella simplicissima falls into the same spectrum it has priority in nomenclature (see Caron, 1966). Herb (1974) pointed to the same kind of hispid surfaces of the tests of H. simplicissima and H. delrioensis. Plate 2, Figures 7c and 10b confirm that statement. These figures demonstrate that spines are not restricted to the Neogene Globigerinacea. Additional investigations will clarify the nature of these "spines." The species had been described from Albian and Cenomanian (mostly sub H. amabilis), according to Caron (1966) and continues up to Santonian. Several very small specimens were encountered in our material, down to Aptian strata which resemble the outline of H. simplicissima. However preservation is too poor for an exact determination.
Synonym list:
Pflaumann & Krasheninnikov (1977):
1954 Hastigerinella simplicissima Magné & Sigal. - Cheylan et al. : p.478 pl. 14; fig. 11 (fide Catalogue of Foraminifera)
1961 Hedbergella amabilis Loeblich & Tappan. - Loeblich & Tappan : p.274 pl. 3; fig. 1-10
1977 Hedbergella simplicissima Magné & Sigal. - Pflaumann & Krasheninnikov : p.555 pl. 2; fig. 8-10
References:

Cheylan,G.; Magné,J.; Sigal,J. and Grékoff,N. (1954):
Résultats géologiques et micropaléontologiques du sondage d\'El Krachem (Haut plateau Algérois).Description de quelques espèces nouvelles . Bulletins de la Société Géologique de France Vol. 6(4) p. 471-488

Loeblich,A.R. and Tappan,H. (1961):
Cretaceous planktonic foraminifera: Part I-Cenomanian . Micropaleontology Vol. 7 p. 257-304

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
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