Grantarhabdus bukryi

Grantarhabdus bukryi Black, 1972a

Length: 5.4 µm

Small (<8.0 µm) species of Grantarhabdus characterised by a symmetrical diagonal cross.

The optical properties are comparable to those of Granthorhabdus.

Grantarhabdus bukryi is distinguished from Grantarhabdus coronadventis by its smaller size (<8.0 µm).

Grantarhabdus bukryi differs from Grantarhabdus quadratus from the Late Oxfordian to the Late Hauterivian in having a larger central area and narrower shields. Moreover, Grantarhabdus bukryi is separated from Grantarhabdus quadratus by a large stratigraphic interval.

Bergen, J. A. 1994. Berriasian to early Aptian calcareous nannofossils from the Vocontian Trough (SE France) and Deep Sea Drilling Site 534: new nannofossil taxa and a summary of low-latitude biostratigraphic events. Journal of Nannoplankton Research. 16(2): 59-69.

Black, M. 1971a. Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society 38: 381-424.

Black, M. 1972a. British Lower Cretaceous Coccoliths. I-Gault Clay (Part 1). Palaeontographical Society Monograph. 126: 1-48.

Grün, W. & Allemann, F. 1975. The Lower Cretaceous of Caravaca (Spain): Berriasian Calcareous Nannoplankton of the Miravetes Section (Subbetic Zone, Prov. of Murcia). Eclogae Geologicae Helvetiae, 68: 147-211.

Reinhardt, P. 1966b. Zur Taxonomie und Biostratigraphie des fossilen Nannoplanktons aus dem Malm, der Kreide und dem Alttertiär Mitteleuropas Freiberger Forschungshefte. C196: 5-109.

Worsley, T. R., 1971. Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. In: Farinacci, A. (ed.), Proceedings of the Second Planktonic Conference Roma 1970. Edizioni Tecnoscienza, Rome vol. 2, pp. 1301-1321.