"Psammechinus L. Agassiz & Desor, 1846" . "Psammechinus" . . . "123389" . . _:b75923396 . . . "196713" . _:b76639403 "WoRMS id" . "Psammechinus" . "2278833" . . _:b75923396 . . _:b75923396 . . _:b76639403 . . _:b75923396 "GBIF id" . _:b76639403 "123389" . "Psammechinus" . _:b76639403 . . _:b75923396 "2278833" . . _:b76639403 . . "L. Agassiz & Desor, 1846" .