Costellate - definition of Costellate by The Free Dictionary
References in periodicals archive
Radial ornamentation costellate
, with 10 and 11 primary costae respectively on the dorsal and the ventral valve (Table 1).
Cornulitids were found on shells of both Altaethyrella zhejiangensis (19 specimens) and Ovalospira dichotoma (two specimens), which shows that they may have favoured coarsely ribbed shells because none occurred on finely costellate