The Echinoid Directory
Philolectypus sarthacensis (Cotteau, 1856); specimen in private collection. Oolithe de l'Antonniere, Callovian, Middle Jurassic, Degre, Sarthe, France. Lateral view (ambulacrum I facing, periproct just visible beneath ambitus to left). Photograph by Catherine Gallwa, kindly provided by Philippe Mercier.
Diameter of test 36 mm.