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Species / Perissoptera Glabra

Perissoptera Glabra

Stromboidea


Original Description of Rostellaria glabra by Forbes, 1845, p. 350:

  • "Testa elongata, anfractibus 9, seperioribus oblique costatis spiraliter striatisque, striis ad suturam profundioribus, ultimo anfractu glabro, labro expanso, aliformi, triuncinato."
  • "Shell elongated, whorls rather convex, those of the spire are striated spirally, the striae near the suture being so deep as to give them a marginated aspect, and crossed by oblong slender ribs which are much less numerous than in the last species (Rostellaria robinaldina). The body whorl is gently rounded and nearly smooth, or with a few spiral striae only near the suture. The whorl next above it is also free from transverse ribs. The lip is very large and expanded. It is produced above into a long slender linear spur, which if attached to the spire would have converted the shell into a Pterocera. In front the lip has two other diverging spurs of a lanceolate form. The canal is long and very slender."

Locus typicus: Atherfield, Isle of Wight, Great Britain

Stratum typicum: Lower Greensand, Cretaceous

Rostellaria glabra Forbes, 1845, pl. IV, fig. 5

Perissoptera glabra (Forbes, 1845); Atherfield Clay or lower Lobster Bed, lower Aptian, Cretaceous; Atherfield, Isle of Wight, Great Britain; Ex-coll. Beckles; Coll. BM(NH) no. G.6981; Photo Han Stoutjesdijk; Copyright BM(NH)

References

  • Forbes, 1845
  • Edward Forbes, 1845, Catalogue of Lower Greensand Fossils, in the Museum of the Geological Society, with Notices of Species New to Britain, Contained in other Collections. Quarterly Journal of the Geological Society, volume 1: 237-250.
  • Edward Forbes, 1845 b, Explanation of Five Plates of Lower Greensand Fossils, to Illustrate a Report by Professor Edw. Forbes, on the Collection of Lower Greensand Fossils, in the Museum of the Geological Society. Quarterly Journal of the Geological Society, volume 1: 569-573
  • Edward Forbes, 1845, Report on the Lower Green sand Fossils in the Possession of the Geological Society. Quarterly Journal of the Geological Society, volume 1: 78.

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