This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Current identification/main database link: Planohedbergella aspera (Ehrenberg, 1854)
Original Description
EMENDED DESC [copied from Chronos database]- Test planispiral throughout, evolute but not uncoiling, 4.0 to 5.0 chambers in the last whorl; chambers inflated, very slightly appressed; sutures deep; wall finely perforate and quite smooth; aperture a thin to moderate lunate opening on the margin of the last chamber.
Size:
Extra details from original publication
This is a Cretaceous form which authors have invariably called G. aequilateralis Brady, but, unlike Brady's Recent form, it is not partially uncoiled and can always be easily differentiated from the Recent form on that basis. Cushman has made a new genus, Globigerinella, to include the two. I have felt that such is not advisable, at least for the Cretaceous form, which shows insensible variations from G. cretacea, with which it is much more closely related than to Brady's species.
White, M. P. (1928). Some Index Foraminifera of the Tampico Embayment Area of Mexico. Journal of Paleontology. 2(3): 177-215. gs References:
Globigerina voluta compiled by the pforams@mikrotax project team viewed: 10-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=130724 Go to Archive.is to create a permanent copy of this page - citation notes |
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