22 Callochiton septemvalvis COMPARE  Callochiton doriae

22 Callochiton septemvalvis COMPARE  Callochiton doriae

Callochiton doriae 1: SEM image of juvenile, © B. Dell’Angelo. 2: rearranged drawing from Capellini (1859). 3: head valve. 4: tail valve. 5: three grooves on pleural areas of valves ii to vii. Grooves are difficult to discern in photographs of uncleaned live specimens. 6: many grooves on pleural area of intermediate valve. 7: needle-like scales on girdle.