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: Pearsonites lodoensis (Mallory 1959)
Occurrence: This species occurs in the "marne bleue" of Mont Cayla. Hamilton has found similar specimens in a Paleocene fauna from the Hessguyot in the Pacific.
Original Description
Description.- Test trochoid, biconvex, equatorial periphery rounded; test calcareous perforate, entirely covered by spines which are coarse around the umbilicus; all the chambers exposed on the spiral side, but only those of the last volution are distinst; five to six chambers of the last volution visible on the umbilical side; sutures on umbilical side straight, radial, flush, becoming depressed in the last volution of mature specimens; sutures; sutures on spiral side slightly curved, tangential, depressed near periphery; umbilicus small, deep, open; aperture interiomarginal lunate arch, extending over about two-thirds of the base of the apertural face, usually with narrow lip, umbilical-extraumbilical, sinistral coiling prevalent.
Size:
Etymology:
Extra details from original publication
Remarks: Globorotalia caylaensis n. sp. differs from Globorotalia mckannai (White) in that the latter has a more convex spiral side, more globular chambers, wider umbilicus, and a more lobate periphery and rounded margin. Globorotalia angulata (White) has a larger umbilicus, more angular margin sometimes with a faintly developed keel, and a more extraumbilical position of the aperture.
Globorotalia caylaensis compiled by the pforams@mikrotax project team viewed: 9-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=131088 Go to Archive.is to create a permanent copy of this page - citation notes |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments