Crepidolithus parvulus
Set number: 2986
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10µm
Crepidolithus parvulus de Kaenel & Bergen, 1996b
In plan view under crossed polars, the wall exhibits weak birefringence, showing greyish-white interference colours and length-slow (+) elongation when a gypsum plate is inserted into the light path.
A small (<5.0 μm) species of Crepidolithus, characterised by a broad, single wall and a small central opening, which may be covered by a thin structure.
de Kaenel, E. & Bergen, J. A. 1996b. Mesozoic calcareous nannofossil biostratigraphy from sites 897, 899, and 901, Iberia Abyssal Plain: New biostratigraphic evidence. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 27-59
Holotype
Crepidolithus parvulus
de Kaenel & Bergen, 1996b
Tithonian
ODP Leg. 149, Site 901, Iberia Abyssal Plain, North Atlantic Ocean