†Sismondia javana Nisiyama 1968 (sand dollar)
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Echinoidea - Clypeasteroida - Laganidae
Full reference: S. Nisiyama. 1968. The echinoid fauna from Japan and adjacent regions, Part II. Paalaeontological Society of Japan Special Papers 13:1-480
Belongs to Sismondia according to S. Nisiyama 1968
Sister taxa: Sismondia arnoldi, Sismondia coalingaensis, Sismondia convexa
Subtaxa: Sismondia javana ladronensis
Type specimen: IGPS 73737
Ecology: slow-moving semi-infaunal detritivore
Distribution: found only at Thaytiniti (Oligocene of Oman)
Specimen images are retrieved through the ePANDDA API.
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