The Echinoid Directory

Contributed by Jenna Sullivan, May 2007

Eupatagus hollisi Stockley 1927, p. 111

Diagnostic Features
  • Oultine elongate, ovate, obtusely polygonal, with a breadth five-sixths the length; somewhat pointed and truncated posteriorly. Ambitus inflated, with almost vertical walls.
  • Petals extend nearly to the margin, the posterior pair being longer than the anterior.
  • Lower surface is almost flat, somewhat concave at the sides and around the peristome, but distinctly convex about the sternum, especially posteriorly.
  • Apical system is excentric, situated two-fifths of the length of the test away from the anterior margin, and conforms with the typical generic characters.
  • Tubercles in the interambulacral areas are unequal, the larger ones occurring in uneven transverse rows.
  • Periproct is elliptical, divided by the subanal fasciole from a uniformly convex sternum.
(from Stockley, 1927, p. 111)
Distribution Lower Miocene, Burdigalian, Pemba Series, Chake Chake Beds of Funzi Isle, Pemba Island, East Africa.
Type Holotype: NHM E17878.
Classification and/or Status Species of Eupatagus.
Remarks In outline it resembles E. valenciennesi Agassiz & Desor. This differs chiefly in the short sollen petals, the peripetalous fasciole consequently being somewhat nearer to the apical disc. E. hollisi differs in outline from E. mooreanus H. Pilsbry from the Pliocene of North America in that in E. mooreanus, the highest point is situated close to the periproct; on the lower surface the large tubercles crowd somewhat towards the peristome and the labrum is less definite. E. clevei Cotteau from the Eocene of the West Indies is strongly tuberculate in the posterior interradius, and more elevated posteriorly. E . floridanus W. B. Clark, a Lower Oliogocene form from Florida, differs chiefly in its rounder outline; its interporiferous zones are wider, amb. iii is slightly more depressed, and large tubercles are found on interambulacrum V, but it strongly resembles E. hollisi in its plastronal structure. (Stockley, 1927, p. 113).

Stockley, G. M. 1927. Neogene Echinoidea from the Zanzibar Protectorate. Report on the Palaeontology of the Zanzibar Protectorate p. 111.