holotype-617.jpg
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.
holotype-617.jpgCurrent identification/main database link: Planoheterohelix globulosa (Ehrenberg, 1840)
Original Description
Test small, biserial, expanding moderately except at the top, maximum breadth at horizontal line at middle of final chamber through penultimate chamber pair, median line slightly to moderately zigzag, periphery lobate; chambers in 6-9 pairs; early chambers small, subglobular, later chambers uniformly increasingly inflated till the pen- ultimate one; final chamber globose, highly inflated, constituting one-third to one-half the test size; sutures curved, moderately to deeply depressed, inclined all through length of test; wall calcareous perforate; surface ornamentation prominent curved striae; aperture a small oval to circular interiomarginal opening on final chamber.
Odebode, M. O. (1982). Senonian Heterohelicidae from the Cal-abar Flank southeastern Nigeria. Revista Española de Micropaleontología. 14(1-3): 321-246. gsReferences:
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Heterohelix nkporoensis compiled by the pforams@mikrotax project team viewed: 13-4-2021
Short stable page link: https://mikrotax.org/pforams/index.php?id=131790 Go to Archive.is to create a permanent copy of this page - citation notes |