arrayname: original 

Abathomphalus sp.

Taxonomy

Entries in the Catalog of original descriptions:

Distinguishing features:
Parent taxon (Abathomphalus): Test in a low to flat trochospiral, umbilicate, four to five petaloid chambers per whorl, sutures curved and oblique, depressed to thickened and nodose on the spiral side, depressed and radial around the small umbilicus on the umbilical side, periphery angular to truncate, bicarinate, the two variously spaced keels bordering an imperforate carinal band, keel on the umbilical side may be reduced to a row of short transverse costellae; wall calcareous, perforate, surface with pustules and short costellae in concentric alignment on the spiral side and radial on the umbilical side; primary aperture in teriomarginal, extraumbilical-umbilical, and with a porticus, portici of successive chambers coalescing in the early stage, larger in the adult stage and joined only at a few points to form a tegilla having distal accessory apertures.
This taxon: Specimens which cannot be assigned to established species

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage).
First occurrence (base): within (-Ma, base in "Holocene" stage).

Plot of range and occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Abathomphalus sp., synonyms included - Abathomphalus cretaceus; Abathomphalus intermedius/mayaroensis; Abathomphalus cf. mayaroensis; Abathomphalus tran. mayaroensis; Abathomphalus intermedius (q);
• See also space-time plot :: Samples map :: Parent: Abathomphalus

Abathomphalus sp. compiled by the pforams@mikrotax project team viewed: 20-4-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110005 Go to Archive.is to create a permanent copy of this page - citation notes

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