Zygodiscus biclavatus Bukry, 1969
Zygodiscus macleodiae Bukry, 1969
Zygodiscus tarboulensis Shafik & Stradner, 1971
Medium-sized species (4.0 - 7.0 µm] of Konyaea having two angular segments exhibiting interference colours with large pores aligned to the long axis. The wall and the fibrous transverse bar have constant extinction in plan view under cross-polarised light.
Bukry, D. 1969. Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles 51 (Protista 2): 1-79.
Shafik, S. & Stradner, H. 1971. Nannofossils from the Eastern Desert, Egypt. Jahrbuch der Geologischen Bundesanstalt Sonderband, 17: 69-104.
Zygodiscus biclavatus
Bukry, 1969
Middle Santonian
Walnut Creek at Route 290, Austin, Texas, USA