Cibicidoides sp. A

Hanagata, S & Nobuhara, T, 2015, Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraph, Palaeontologia Electronica (Cambridge, England) 33 (8), pp. 1-142 : 100

publication ID

https://doi.org/ 10.26879/444

persistent identifier

https://treatment.plazi.org/id/A029445F-E944-FFE1-4AAB-BCE67785A6E3

treatment provided by

Felipe

scientific name

Cibicidoides sp. A
status

 

Cibicidoides sp. A

Figures 30.5, 30.6 View FIGURE 30

Description. Test very small for the genus, approximately 0.12—0.15 mm in diameter; trochospiral, biconvex but umbilical side more convex; periphery rounded; seven to eight chambers in the last whorl; sutures on dorsal side strongly curving backwards, umbilical side radiate; aperture interiomarginal extending to edge of periphery of last chamber; test thin and finely perforate.

Remarks. We could not find any taxon to assign this specimen to. This form might be a juvenile of any species of Cibicidoides , although all our specimens show the similar small test size and we regard them as adult.

Occurrence. Thirty-nine specimens from only a single sample of the Yonahama Formation.

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