Biscutaceae
Type Genus
Biscutum Black in Black & Barnes, 1959
Remarks
Podorhabdaceae and Biscutaceae comprise similarly constructed placoliths, characterised by non-imbricate segments, a proximal shield, and a tube cycle surrounding a central area spanned by a cross, bar, or perforated structure. Strictly speaking, they may be regarded as synonymous.
In this work, taxa bearing a distal process are assigned to Podorhabdaceae, whereas members of Biscutaceae lack a distal process.
References
Black, M. 1971a. Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society 38: 381-424.
Black, M. & Barnes, B. 1959. The structure of Coccoliths from the English Chalk. Geological Magazine. 96(5): 321-328.
