Gyroidina 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 : 118

publication ID

https://doi.org/ 10.26879/444

persistent identifier

https://treatment.plazi.org/id/A029445F-E956-FFF3-4AB8-BDA67752A7A3

treatment provided by

Felipe

scientific name

Gyroidina sp. A
status

 

Gyroidina sp. A

Figures 34.9, 34.10 View FIGURE 34

Description. Test biconvex, umbilical side slightly more convex; six to seven chambers in final whorl; sutures on dorsal side gently curved backwards and radiating on umbilical side, not depressed; periphery round to subacute; umbilicus closed; aperture interiomarginal in the middle of apertural face; surface smooth and finely perforated.

Remarks. Due to poor preservation of specimens, we tentatively distinguish this species as sp. A.

Occurrence. A single specimen each from the Yonahama and Minebari formations.

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