†Periarchus altus Conrad 1865 (sand dollar)
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Echinoidea - Clypeasteroida - Protoscutellidae
Alternative combination: Sismondia alta
Belongs to Periarchus according to W. B. Clark and M. W. Twitchell 1915
Sister taxa: Periarchus kewi, Periarchus lyelli, Periarchus pileussinensis, Periarchus protuberans, Periarchus quinquefarius, Periarchus rutriformis
Ecology: slow-moving semi-infaunal detritivore
Distribution: there are no occurrences of Periarchus altus in the database
Specimen images are retrieved through the ePANDDA API.
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