Myja hyotan Martynov, Mehrotra, Chavanich, Nakano, Kashio, Lundin, Picton & Korshunova, 2019

ウメガエミノウミウシ Myja hyotan
Photographed by
KIMOTO Nobuhiko
Location
MonShita, Osezaki, Nishiizu, Japan
Date
2017/09/26
Length
10mm
Depth
20.0m
Water temperature
24.0℃

MORPHOLOGY

Up to eight ceratal rows, ground colour translucent greyish, ceratal cores white to dark greyish, ceratal tops dull reddish, no apical white spot, anterior cerata with prominent dark brownish basal spot, sparse white spots in the first half of the dorsal part, white gonad spherules very dense, cerata considerably widened at top with smaller separate cupola-shaped tip, central tooth narrowly triangular with largely non-pitted top and only few denticles, up to ten small denticles, irregular in size; no accessory penial gland, penis unarmed.

DISTRIBUTION

Central parts of the Pacific coast of main Japanese island Honshu; potentially can occur at the southern parts of Honshu and Kyushu.

ETYMOLOGY

After the Japanese name hyōtan (瓢箪, ヒョウタン) for the calabash Lagenaria siceraria, the fruits of which are very similar in shape to the peculiar cupola- shaped tip of cerata of this new Myja species.

References