Diagnostic Features: Mantle oval. Male and female arm lengths subequal. Arm suckers tetraserial.
Hectocotylus present on left ventral arm: 10 to 12 rows of normal size suckers proximally, 6 rows of
reduced suckers medially, then normal size suckers distally to arm tip. Suckers of hectocotylus in 2 dorsal
series are much smaller than those in 2 ventral series;