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Species / Bicorempterus Elegans

Bicorempterus Elegans


Original Description of Alaria bispinosa var. elegans by Hudleston, 1884, p. 152:

  • "Shell turrited, somewhat elongate, the spire increasing with great regularity. The complete spire would consist of about 12 whorls, of which 7 are in good preservation. The earlier whorls are short, tumid, and scarcely angular; they are ornamented with spiral lines of great regilarity, one of which presently begins to develope as a keel rather below the middle of the whorls, which, in that part of spire immediately posterior to the body-whorl, become more angular, the upper half projecting outwards to meet the keel, whilst the lower half is slightly constricted. The spiral lines continue about the same in number, but increase in size with the increasing whorls. These keels are split by a very shallow spiral groove. Sutures close. The spiral lines in the anterior portion of the whorls are fewer and wider apart than those in the upper portion. A similar style of ornament pervades the body-whorl, where a very sharp and prominent upper carina occupying a median position is developed, and a very subordinate anterior one. This upper keel is prolonged in a very stout digitation, which is broken off. There is no trace of any digitation in connection with the anterior keel, which seems to die out towards the margin. The canal sheath, or tail, is broken off just where an apparent curvature is commencing: all this portion of the shell is ornamented with spiral lines, which are rather finer than those on the spire."

Alaria bispinosa var. elegans Hudleston, 1884 pl. VI, fig. 8, 8a

Alaria bispinosa var. elegans Hudleston, 1884; Holotype; Cornbrash Rock Unit, Callovian Bathonian, Jurassic; Scarborough, Yorkshire, England; Copyright Sedgwick Museum of Earth Sciences


  • Blake, J.F. 1905. A monograph of the fauna of the Cornbrash Palaeontographical Society Monographs p.63
  • Cox, L.R. & Arkell, W.J. 1950. A survey of the mollusca of the British Great Oolite series Palaeontographical Society Monographs p.81
  • Hudleston, 1884. I. Contributions to the Palaeontology of the Yorkshire Oolites. Geol. Mag., dec. iii, vol. i, p.145- 154, pl. vi, Vii Fulltext
  • Woods, H. 1891. Catalogue of the Type Fossils in the Woodwardian Museum, Cambridge. Henry Woods with preface by T. McKenny Hughes CUP. 180+xiv SPL: II. 16 p.94

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