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Species Globorotalia bykovae Aisenstat 1960


Discussion / Comments:
Rögl (1985):
G. bykovae is similar to G. peripheroronda but differs in usually being smaller (0.2-0.36 mm) and in having chambers arranged in a slightly imbricated mode resulting in an undulating test surface. The umbilical side is fairly high with a small cavity which is still less developed in G. peripheroronda, where in comparison the peripheral angle is higher and more prominent. The species is small in the Early Badenian, becoming larger in the Late Badenian (Early Kosovian) of the Central Paratethys. A subspecific distinction on size does not seem to be justified.
Synonym list:
Rögl (1985):
1960 Turborotalia bykovae Aisenstat. - Subbotina : p.69 pl. 13, figs. 7a-c
1978 Globorotalia bykovae minoritesta Papp. - Papp et al. : p.278 pl. 7, figs. 1-3 Synonym
1985 Globorotalia bykovae Aisenstat. - Rögl : p.325 figs. 5.13a-c; 3
References:

Subbotina,N.N. (1960):
Pelagicheskie foraminifery paleogenovykh otlozhenii yuga SSSR.
In: Paleogenovye otlozhenii yuga evropeiskoi chasti SSR Eds: Yanshin, A.L.et al. p. 24-36

Papp,A.; Roegl,F.; Cicha,I.; Ctyroka,J. and Pishvanova,L.S. (1978):
Planktonische Foraminiferen im Badenien Translated Title: Badenian planktonic foraminifera. .
In: Chronostratigraphie und Neostratotypen; Miozaen der Zentralen Paratethys; M4--Badenien (Moravien, Wielicien, Kosovien) p. 268-278

Rögl,F. (1985):
Late Oligocene and Miocene planktic foraminifera of the Central Paratethys.
In: Plankton Stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 315-328
Anonymous: Unedited TaxonConcept data
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