Trochidae
Calliostoma problematicus (Kuroda & Habe, 1971)
[Niyori ebisugai]
Description
Pearly pale yellowish brown with granular spiral ribs near the suture.
Resembles Calliostoma akoya gold type, but top of the shell colored by purplish
brown and brown bloch on the spire.
Locality
Japan: Sagami Bay in 250-300m, Mouth of Tokyo Bay in 250-300m.
Original articles of scientific name
1971 Tristichotrochus problematicus Kuroda & Habe, The Sea Shells
of Sagami Bay p.25, Pl.10, figs. 1,2,7,8.
Original of Japanese name
Ditto.
Remarks
Calliostoma problematicus can be found at shallower depths than
Calliostoma akoya, but rare.
