Costasiella usagi Ichikawa, 1993

ウサギモウミウシ Costasiella usagi
Photographed by
鎌田 陽介
Location
砂丘伝説, Miyako Is, Okinawa, Japan
Date
2017/11/26
Length
3mm
Depth
7.0m
Water temperature
24.6℃
Comment is not registered
Ichikawa, M. 1993. Saccoglossa (Opisthobranchia) from the Ryukyu Islands. Publications of the Seto Marine Biological Laboratory, 36: 119-139. The large eyes lie close together between the bases of the simple rhinophores. The anterior corners of the foot are tentaculiform and the tail is long and pointed. The head and the tail are not pimented, and the rhinophores are black. The median cerata are grey, while the outer ones are black. All the cerata possess a white end with a black tip. Moreover, all the cerata bear longitudinal striations reaching from the base of each ceras to the white apical portion. The cerata are arranged in about 10 rows. The ventral side of the foot is white.
Ichikawa, M. 1993. Saccoglossa (Opisthobranchia) from the Ryukyu Islands. Publications of the Seto Marine Biological Laboratory, 36: 119-139.

References