The Echinoid Directory

Contributed by Andrew Smith, October 2010

Lanthonia grantii Mortensen, 1948

Diagnostic Features	Compared to other species of Mellita maximum thickness of test at apical disc periproct anterior to and not entering the anal lunule
Distribution	Recent; northern Gulf of California to Panama
Type	Zoologisk Museum, Copenhagen EE220-1
Classification and/or Status	A species of Lanthonia
Remarks	See Harold & Telford (1990) Coppard, S. E. 2016. A new genus of mellitid sand dollar (Echinoidea: Mellitidae) from the eastern Pacific coast of the Americas. Zootaxa, 4111, 158-166. Harold, A. S. & Telford, M. 1990. Systematics, phylogeny and biogeography of the genus Mellita (Echinoidea: Clypeasteroida). Journal of Natural History 24, 987-1026. Mortensen, T. 1948. A monograph of the Echinoidea. Volume IV, part 2. Clypeasteroida. C. A. Reitzel, Copenhagen