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Species Catapsydrax echinatus Bolli 1957 | ||||||
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| Diagnosis / Definition: | ||||||
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Bolli (1957): Shape of test low to medium trochospiral; equatorial periphery lobate; axial periphery rounded, more rarely becoming slightly subangular. Wall calcareous, perforate, surface covered with short, thin spines. Chambers spherical or slightly compressed, 10-15 in about 2 1/2 whorls; the last whorl of about 4 chambers increasing fairly rapidly in size. Sutures on spiral side radial or slightly oblique, depressed; on umbilical side radial, depressed. Umbilicus fairly narrow, covered by a bulla. Primary aperture covered by umbilical bulla, interiomarginal, umbilical; accessory apertures of bulla very small medium to low arches, one or two in number, occasionally more, infralaminal, situated above sutures between earlier chambers. Coiling in over 90 percent of specimens sinistral in the Porticulasphaera mexicana zone. Largest diameter of holotype 0.37 mm. |
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| Discussion / Comments: | ||||||
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Bolli (1957): Catapsydrax echinatus, new species, is distinguished from C. dissimilis (Cushman and Bermudez) and C. unicavus Bolli, Loeblich, and Tappan by having a distinctly spinose surface. This type of surface ornamentation is characteristic for many upper Paleocene to middle Eocene planktonic species. The bulla, which varies considerably in size may be smooth (see fig. 5b) or spinose (see figs. 2b, 3b). Most specimens observed are smaller than the average size of C. cf. dissimilis found in the upper part of the Navet and San Fernando formations. |
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| Systematics: | ||||||
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1 Superregnum Eukaryota Regnum Protoctista Phylum Ciliophora Subphylum Postciliodesmatophora Ordo Globigerinida Superfamilia Globorotaliaceae Superfamilia Nonionacea Familia Catapsydracidae Genus Catapsydrax Species Catapsydrax echinatus 24 Genus Catapsydrax Genus Globigerina Species Catapsydrax echinatus |
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| Synonym list: | ||||||
| Bolli (1957): 1957 Catapsydrax echinatus Bolli. - Bolli : p. 274 pl. 37, figs. 2a-5b new species
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| Was used in synonym list of: | ||||||
| References: | ||||||
Bolli,H.M. (1957): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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Taxon relations
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