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Species / Pteroceras Globulatum

Pteroceras Globulatum

  • Pteroceras globulatum Seeley, 1861

Original Description of Pteroceras globulatum by Seeley, 1861, p.281:

  • "Shell ventricose, ovately fusiform. Spire about one-third the length of the shell, composed of four whorls, which rapidly increase in size, and are rounded, inflated, and striated. Body-whorl very large, ornamented on its most tumid part with two keels, which, as they approach the aperture, become more elevated; the lower one then diverges rapidly anteriorly, and the upper one is turned a little towards the spire: a part of the cast of the last whorl is directed up the spire, and appears to have been produced into a canal; so that the shell was probably digitated like P. Fittoni (Forbes). Between the keels are four striae, of which the outer ones are least elevated. Posterior to the keels the casts show but two striae, and those near to the rib. Anteriorly the striae were more numerous; but, from the canal being always broken, the number is not evident: there appear to have been five, with two beyond them less distinct. Mouth crescentic, oblique."

Localities: Cambridge, Ashwell, Hertfordshire County, East Region, England

Stratum: Cambridge Greensand, lower Cenomanian, upper Cretaceous (Hart, 1973)

Pteroceras globulatum Seeley, 1861, pl. XI, fig. 1

Comment

References

  • Gardner, 1875
  • J.S. Gardner, G.M. dec. 2, VII (1880), p. 53
  • M.B. Hart, 1973. Foraminiferal evidence for the age of the Cambridge Greensand. Proceedings of the Geologists' Association, Volume 84, Issue 1, 1973, pp. 65-82
  • H.G. Seeley, 1861. The Annals and magazine of natural history: zoology, botany, and geology ser. 3. VII (1861), pl. XI, fig. 1, p. 281.

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