Retecapsa schizobrachiata

Vekshinella schizobrachiata Gartner, 1968

Retecapsa levis Black, 1972a

Retecapsa tridentata Wind & Wise in Wise & Wind, 1977

Species of Retecapsa comprise a cretarhabdid pelaga enclosing a broad central area spanned by a well-defined axial cross that bears a distal process. The longer arms of the cross trifurcate adjacent to the pelaga, producing two small lateral pores that are markedly smaller than those formed within the central area. The shorter arms are likewise furcate but do not generate pores.

Retecapsa schizobrachiata exhibits first-order, greyish-white interference colours. In plan view under crossed polars, the pelaga shows inclined extinction and length-fast (–) elongation.

Gartner, S., 1968. Coccoliths and related calcareous nannofossils from Upper Cretaceous deposits of Texas and Arkansas. University of Kansas Paleontological Contributions, Articles 48 (Protista 1), 1-56.

Wise, S. W. & Wind, F. H. 1977. Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36: 269-491.

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