Jain, R. L. 2002. Echinoids from the Gaj Formation (Early and Middle Miocene) of Kathiawar, Gujarat, India. Journal of the Palaeontological Society of India 47, 107-135.

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Publication

A new collection from the early and middle Miocene of the Gaj Formation in Kathiawar has yielded 27 echinoid species. Of these, 10 species were already known previously from the study area, 11 species were known from outside the study area of Kathiawar and remaining six have been named here as new species. Already recorded species are figured, described their additional characters and registered better types. Duncan and Sladen (1883, p. 86-87) had wrongly assigned the material of the genus Maretia from the present study area under Eupatagus patellaris d'Archiac, 1850. Since Eupatagus patellaris d'Archiac, 1850 is a valid species for Kachchh and Sind, the present collection of Maretia from Kathiawar is described as a new species. The new species are Fibularia depressa, Mortonia lowraliensis, Brissus daviesi, Maretia ranjitpurensis Metalia harshadi and Clypeaster kurangaensis. Tenurechinus costatus (d'Archiac & Haime), T rousseaui (d'Archiac), T tuberculosus (d'Archiac & Haime) and T affinis Duncan & Sladen have been described under the genus Opechinus Desor. Cidaris granulata Duncan & Sladen and Cidaris excelsa Duncan & Sladen have been put under the genus Prionocidaris. Cidaroid spines mostly belong to the genus Prionocidaris and Eucidaris.

Echinoidea

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