Zeugrhabdotus trivectis Bergen, 1994
From Greek diploos / diplo-, double, and teichos, wall; referring to the double-walled construction of the loxolith.
Loxoliths are characterised by a double wall and a central area spanned by a transverse bar that supports a distal process.
In plan view under cross-polarised light, the outer wall remains in constant extinction, whereas the inner wall exhibits interference colours. The transverse bar may or may not display interference colours, depending on its construction.
Diploteichus differs from Glaukolithus and Zeugrhabdotus in having a double wall; both of the latter genera possess a single wall.
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.