Orientomysis pseudomitsukurii ( Ii, 1964 ) Fukuoka & Murano, 2005

Fukuoka, Kouki & Murano, Masaaki, 2005, A revision of East Asian Acanthomysis (Crustacea: Mysida: Mysidae) and redefinition of Orientomysis, with description of a new species, Journal of Natural History 39 (9), pp. 657-708 : 682-683

publication ID	https://doi.org/ 10.1080/00222930400001418
publication LSID	lsid:zoobank.org:pub:94C1EB6D-F636-485E-931F-8A217B2B0DD3
persistent identifier	https://treatment.plazi.org/id/0A1A87E5-FFAD-9B05-FE82-2163433CEFB7
treatment provided by	Felipe
scientific name	Orientomysis pseudomitsukurii ( Ii, 1964 )
status	comb. nov.

Treatment

Orientomysis pseudomitsukurii ( Ii, 1964) comb. nov.

( Figure 6 View Figure 6 ) Acanthomysis pseudomitsukurii Ii 1964: 513–516 , Figure 133; Mauchline and Murano 1977: 45 (list); Müller 1993: 196, 197 (list).

Type locality

Coast near Marine Biological Center of Tokyo Bunrika University (now University of Tsukuba ), Shimoda, Shizuoka, central Japan .

Material examined

Sixty-three males (5.2–8.5 mm) and 54 females (4.5–8.2 mm), Nii-jima Island, Izu Islands, central Japan, among seaweeds, May 1973, coll. M. Muto, NSMT-Cr 15581. One female (6.9 mm), Uchiura Bay , Chiba, central Japan, 29 April 1975, NSMT-Cr 15582. One female (8.0 mm), Fukiage-hama Beach, East China Sea side of Kagoshima, western Japan, 20 March 1988, coll. T. Noichi, NSMT-Cr 15583. Three females (8.0– 8.5 mm), Fukiage-hama Beach, Kagoshima, western Japan, 21 March 1988, coll. T. Noichi , NSMT- Cr 15584. Nine males (5.7–6.7 mm), three immature males (4.5–5.3 mm) and 18 females (5.5–7.5 mm), Tottori, western Japan, 5 m, sledge net, 8 June 1988, coll. Y. Hirota, NSMT-Cr 15585. Two males (5.5 and 6.3 mm), Banda Beach , Tateyama , Chiba, central Japan, 4 m, sledge net, 13 July 1994, coll. K. Fukuoka, NSMT-Cr 15586. Two females (6.1 and 6.2 mm), Banda Beach , Tateyama , Chiba, central Japan, 0–0.5 m, sandy beach, sledge net, 20 September 1994, coll. K. Fukuoka, NSMT-Cr 15587. Fourteen males (7.8– 9.8 mm) and 19 females (7.3–9.5 mm), Tottori, western Japan, date unknown, NSMT-Cr 15588 .

Remarks

Location of type specimens is unknown.

Some differences exist between Ii’s description and the present specimens. According to Ii (1964), the eyestalk was not armed with a papilliform process on the dorsal surface, whereas a small but distinct process is present in our material. Ii (1964) also described a single distinct transverse dorsal fold on each of the second to fourth abdominal somites, but the state of the abdomen varies with individuals in the present specimens ( Figure 6 View Figure 6 ; Table VII). The folds on the second to fifth abdominal somites are frequently indistinct.

Orientomysis pseudomitsukurii resembles O. leptura and O. tenella . Differences among these three species are summarized in Table V.

Distribution

This species is recorded only from the Japanese warm water region: Shizuoka ( Ii 1964), Yamaguchi, Tottori ( Hirota et al. 1989), Nii-jima Island of Izu Islands, Chiba, and western Kagoshima (present study).

In Japan Sea coasts, this species is abundantly distributed in depths of 4–5 m ( Hirota et al. 1989). They were collected from near shoreline and among seaweeds (present study).