(Lohmann 1902) Gaarder, in Gaarder & Heimdal 1977 [Syracosphaera]
After Young et al. Coccospheres (sub-) spherical 12-20 μm. BCs elliptical (3-4 μm ); low central mound formed of two irregular elements joined by transverse suture. Inner rim cycle lower than outer, forming shelf inside the lith.
Sub-tropical (Findlay & Giraudeau, 2000).
After Young et al. Holococcolith associations: three different holococolith morphotypes have been shown to be associated with C. mediterranea.
Calyptrolithina wettsteinii - combination coccospheres figured in Kamptner (1941) and Cross et al. (2000).
Calyptrolithophora hasleana - combination coccospheres figured in Cortes & Bollmann (2002).
Zygosphaera hellenica - developed in culture isolate, Geisen et al. (2002).
The range of holococcolith morphologies developed suggests that C. mediterranea may comprise at least three species which cannot, yet be differentiated on the basis of heterococcolith morphology (Geisen et al. 2001). Although the three holococcolith types have been placed in different genera they have common features, in particular they are all dimorphic with flat-topped BCs and zygolith CFCs.