The Echinoid Directory

Contributed by Dinesh Srivastava, December 2008

Echinolampas lipiformis Srivastava and Singh, 1999, p. 27

Diagnostic Features
  • Test small, anteriorly oval and posteriorly protruded; maximum width opposite to petals I&V; oral surface slightly depressed; highest point of the test towards posterior ambitus.
  • Apical system monobasal, pentagonal, excentric anteriorly.
  • Petals short, open and do not reach up to the ambitus; I & V longest and others have equal width; poriferous zones unequal; pore pairs are conjugated by grooves.
  • Peristome large, oval, excentric anteriorly. A prominent flange is present around the peristome
  • Bourrelets and phyllodes (nucleolitid type) poorly developed
  • Periproct inframarginal near the posterior ambitus, transversally oval.
  • Tubercles abundant, non-perforate and non-crenulate.
Distribution Asterocyclina alticostata Zone, middle Eocene; Kachchh (Gujarat), India
Type Holotype No. KTE 677; Paratypes Nos. KTE 388, KTE 678 and KTE 679. 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 lipiformis is close to E. valettei Lambert described from the early Eocene (Ypresian) sediments of Madagascar (Lambert, 1933) except that it has a higher test towards the posterior side and transversally oval periproct. E. lipiformis differs from Echinolampas sp. (Junior) described from the Kirther sediments of Sind (Duncan & Sladen, 1882-1886) in having an oval and lipped 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. 174, pl. 31, figs. 1-5.

Lambert, J., 1933. Echinides de Madagascar. Service des Mines Madagascar Annals Geolologiques 3, p.1-49, pl. 4.

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. 27, pl. II, figs. 6-8.