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Species / Rimella Hollandi

Rimella Hollandi

Stromboidea

  • Rimellidae
    • Rimella hollandi Cossmann & Pissarro, 1909

Original Description of Rimella Hollandi Cossmann & Pissarro, 1909:

  • “Size moderate, shape somewhat depressed; spire elongated, conical or slightly conoidal; seven very convex whorls, whose height is half their width, somewhat depressed at the suture which is deep and bordered by a ridge; ornamentation consisting of curvilinear ribs, fine and very crowded, posteriorly interrupted by a spiral groove which separates a small crenulated ridge encircling the suture; the remainder of the shell is marked with exceedingly fine spiral striations which do not cross the axial ribs. Body-whorl large, constituting nearly two third of the total height, with a convex base upon which the ornamentation persists almost up to the neck of the canal, while at the anterior region are some revolving threads producing square granulations at their intersection with the ribs. Aperture small; outer lip posteriorly produced into a rather narrow wing reaching the apex, but not extending very far on to the opposite side of the spire; columellar edge callous somewhat detached from the base, coalescing posteriorly with the prolongation of the outer lip.”

Locus typicus: India “Jhirak

Stratum typicum: Lower Eocene, “Uppermost Ranikot”

Comments by Cossmann & Pissarro, 1909, p. 49:

  • “Comparision with other species. - This species cannot be mistaken for R. Prestwichi or R. fusoides, from both of which it is clearly distinguished by its depressed shape and especially its completely different ornamentation: instead of lamellar ribs like those of R. Prestwichi, R. Hollandi bears thin curvilinear ones; the sutures are encircled by a small crenulated ridge which replaces the sutural groove of R. fusoides. Moreover, the ornamentation commences with the earliest stages, while R. fusoides has the first whorls smooth. Amongst the species of the same group described by d’Archiac and Haime, we do not find any closely related to R. Hollandi: R. Jamesoni, which somewhat resembles it in general outline, has the spire smooth, and the sutures non-crenulate. R. cf. rimosa, Sow., is represented only by fragments ornamented with coarser and wider striations.”

References

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