Search:
Recent Changes - Keyword Listing

edit SideBar

Species / Calyptraphorus Hollandi

Calyptraphorus Hollandi

Stromboidea


Original Description of Calyptrophorus Hollandi Cossmann, M. & Pissarro, G. 1909, p. 45:

  • “Size moderate, shape rather depressed; spire elongated, conical, consisting of about eight convex whorls whose height is al little less than half their width, separated deep by sutures, ornamented with thin, crowded, curvilinear striae of growth. Body-whorl large, angular at the base which is rounded; the suture is surrounded by a more or less prominent swelling upon which the lines of growth are more pronounced than on the remainder of the whorl; in front of the peripheric angle, the base is ornamented with concentric threads of alternating size; the body-whorl also bears a thick varix, not opposed to the aperture; columella excavated. The prolongations of the external lip and columellar margin constitute a groove with wide-spaced margins, which does not reach quite to the apex of the shell, and on whose external surface the threads of the body-whorl are continuous. The columellar enamel invades a portion of the ventral surface of the spire, and gradually fades away without any sharp boundary.”

Locus typicus: “Left bank of Indus opposite Jhirak”

Stratum typicum: “lower Eocene, uppermost Ranikot”

Comments by Cossmann & Pissarro, p. 46:

  • “Comparison with other species. -Although all the specimens have the aperture damaged, the Jhirak species seem to be really a Calyptrophorus. It differs from C. velatus of Alabama, by its much more depressed shape, its non-gibbous spire, and the swelling tht surrounds the suture of the body-whorl. The dorsally situated varix is very obsolete and does not much resemble the nodosities of C. trinodifer, the other eocene species from the United States.”

References

Edit - History - Print - Recent Changes - Search

- This page is owned by Ulrich Wieneke
- Copyright features see here: Copyright
- It was last modified on October 03, 2016, at 03:13 PM-