The Echinoid Directory

Contributed by Dinesh Srivastava, December 2008

Echinolampas pipurensis Srivastava and Singh, 1999, p. 28

Diagnostic Features
  • Test large, elongate oval; highest point of the test at the apical system.
  • Apical system monobasal, sub-pentagonal, excentric anteriorly.
  • Petals short, open, unequal and do not reach up to the ambitus; I & V longest, slightly flexuous; poriferous zones unequal; pore pairs are conjugated by grooves.
  • Peristome large, pentagonal, excentric anteriorly and lies in a depression.
  • Bourrelets and phyllodes (nucleolitid type) present.
  • Periproct inframarginal, close to the posterior ambitus and transversally elliptical
  • Tubercles abundant, non-perforate and non-crenulate.
Distribution Nummulites maculatus Zone, middle Eocene; Kachchh (Gujarat), India.
Type Holotype No. KTE 274; Paratypes Nos. KTE 268 (found near village Mori, Kachchh (Gujarat), India) and KTE 275. Museum, Centre of Advanced Study in Geology, University of Lucknow, Lucknow.
Classification and/or Status Cassiduloida; Echinolampadidae

A species of Echinolampas Gray, 1825
Remarks Echinolampas pipurensis is close to E. nummulitica Duncan and Sladen described from the Kirther sediments of Sind (Duncan & Sladen, 1882-1886) except that it has short petals and all have identical width. E. pipurensis differs from E. sindensis d' Archiac described from the Kirther sediments of Sind (Duncan & Sladen, 1882-1886) in having anteriorly excentric peristome.

Duncan, P. M. and Sladen, W. P., 1882-1886. Fossil Echinoidea of Western Sind and the Coast of Biluchistan and of the Persian Gulf, from Tertiary formations. Palaeontologia Indica, Ser. 14 1(3), p. 167, pl. 30, figs. 12-15; p. 159, pl. 21, figs. 1-10.

Srivastava, D. K. and Singh, S. K., 1999. Echinolampas- a cassiduloid echinoid from the Tertiary rocks of Kachchh, India. Journal of the Palaeontological Society of India 44, p. 28, pl. III, figs. 1-3.