Amphistegina haueri; Print; Amphistegina is a genus of foraminiferal protists included in the Rotaliida with a stritigraphic range extending from the Eocene to recent and a cosmopolitan distribution. The test is an asymmetrically biconvex trochospiral that may be bi-involute or partially evolute on the spiral side. Chambers are numerous; broad. and low; strongly curved back at the periphery to form chamber prolongations. The umbilical side is stellate; like that of Asterigerina; and has a distinct umbilical plug. The wall is calcareous; optically radial; the surfacce finely perforate and smooth overall. The periphery angular to carinate (keeled); the aperture an interiomarginal slit on the umbilical side; bordered by a lip.
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Details
Creative#:
TOP28123061
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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No
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No
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No
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