Catalog - Catapsydrax echinatus

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Catapsydrax echinatus

Citation: Catapsydrax echinatus Bolli 1957

Type specimens: Holotype (USNM P5729) Figured paratypes (USNM P5730a-c)

Type sample (& lithostrat): Navet formation.

Type age (chronostrat): Porticulasphaera mexicana zone,

Type locality: Locality: Holotype (USNM P5729) and figured paratypes (USNM P5730a-c) from the Porticulasphaera mexicana zone, Navet formation; same locality as given for Hastigerina micra (Cole) (p. 161); sample Hg 8581 (TTOC 215782).

Type repository: Washington; USNM

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

Stratigraphic range: Globorotalia lehneri zone to Truncorotaloides rohri zone, Navet formation.

Remarks: 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 G. cf. dissimilis found in the upper part of the Navet and San Fernando formations.

References:

Berggren, W. A., Pearson, P. N., Huber, B. T. & Wade, B. S. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Acarinina. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 9): 257-326. gs O

Bolli, H. M. (1957a). Planktonic foraminifera from the Eocene Navet and San Fernando formations of Trinidad. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 155-172. gs

Bolli, H. M., Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 3-50. gs

Wade, B. S. & Hernitz Kucenjak, M. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Acarinina. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 46(Chap 13): 393-402. gs

CATALOG OF ORIGINAL DESCRIPTIONS: Catapsydrax echinatus Bolli 1957

Catapsydrax echinatus

References:

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