Reticulofenestra subrotunda
Set number: 992
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Set number: 993
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10µm
Reticulofenestra subrotunda Varol, in prep.
Large [> 10.0µm] elliptical species of Reiculofenestra with a narrow circular central opening distally but narrow elliptical central opening proximally.
From Latin subrotunda, roundish - referring to its distal central opening.
Large [> 10.0µm] elliptical species of Reiculofenestra Hay, Mohler & Wade (1966) with a large circular central opening distally but large elliptical central opening proximally. The tube cycle is distinctly wide.
Reticulofenestra subrotunda differs from Reiculofenestra gelida (Geitzenauer in Geitzenauer & Huddlestun, 1972) Backman (1978) and Reiculofenestra clemencesallyae Varol, in prep. by being larger [>10.0µm]. It is further distinguished from Reiculofenestra clemencesallyae by having a larger, well define circular central opening.
Backman, J., (1978): Late Miocene - Early Pliocene nannofossil biochronology and biogeography in the Vera Basin, SE Spain. - Stockholm Contributions in Geology. 32:93-114.
Geitzenauer, K. R. & Huddlestun, P. (1972). An upper-Pliocene-Pleistocene calcareous nannoplankton flora from a subantarctic Pacific deep-sea core. Micropaleontology. 18(4):405-409.
Hay, W. W., Mohler, H. P. & Wade, M. E., (1966): Calcareous nannofossils from Nal'chik (northwest Caucasus). - Eclogae Geologicae Helvetiae. 59:379-399.Hay,
Holotype
Reticulofenestra subrotunda
Varol, in prep.
Middle Miocene
DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean