Srivastava, D. K. & Singh, S. K. 2001. Some species of Ambylpygus Agassiz, 1840 and an indeterminate holectypoid echinoid from the Middle Eocene rocks of Kachchh (= Kutch), India. Journal of the Palaeontological Society of India 46, 25-36.
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Srivastava, D. K.; Singh, S. K.
2001
Some species of Ambylpygus Agassiz, 1840 and an indeterminate holectypoid echinoid from the Middle Eocene rocks of Kachchh (= Kutch), India