Mysidacea from Coastal Waters of Iriomote Island, Ryukyu Islands, Southwestern Japan, with Descriptions of Three New Species

Abstract

Fifteen mysid species, including three new species, are reported from Iriomote Island, Ryukyu Islands, Japan. A new species, Iiella iriomotensis, is distinguished from related species by the shapes of the rostrum and the telson cleft, the number of spines arming the frontal margin of the labrum, and the endopod of the uropod being shorter than the exopod. Nipponomysis minuta, new species, closely resembles Nipponomysis imparis in respect to the fourth male pleopod, but is distinguished by the shorter telson and the smaller number of spines on the lateral margin of the telson and on the inner margin of the endopod of the uropod. Anisomysis hashizumei, new species, is distinguished from related species by a combination of characters found in the fourth male pleopod and the telson. Haplostylus pusillus, which has been known only from the Indian Ocean, is reported from the Pacific Ocean for the first time. Four species, Siriella inornata, S. anomala, Anchialina zimmeri, and Pseudanchialina pusilla are new records from Japanese waters.

Revision of the Siriella brevicaudata species group (Crustacea: Mysida: Mysidae) from the West Indo-Pacific

“…Siriella lingvura is the northernmost species in the group, found so far exclusively in Japanese waters: mainland and nearby islands -Sagami Bay (type locality), Tanabe Bay (Valbonesi & Murano 1980), Kozu Island, Nomo of Nagasaki, Tanegashima Island (Murano & Fukuoka 2008), Tokyo Bay (Yamada et al 2011); Ryukyu Archipelago -Akajima Island (Murano 1990;Murano & Fukuoka 2008), Iriomote Island (Fukuoka & Murano 1997;Murano & Fukuoka 2008), Ishigaki Island (Murano & Fukuoka 2008) (Fig. 1).…”

Redescription of a rare mysid <i>Nipponomysis surugensis</i> (Murano, 1977) (Crustacea, Mysida, Mysidae) based on specimens from the Seto Inland Sea, Japan

“…These species have threesegmented carpo-propodi in contrast to five or six segments in the typical species of Proneomysis. A three segmented carpo-propod in Nipponomysis has been regarded as a stable character within the genus (e.g., Ii 1964, Taka- hashi & Murano 1986, Fukuoka & Murano 1997, 2001, Liu & Wang 2000, Fukuoka & Pinkaew 2003. Therefore, we hesitated to identify our specimens as N. surugensis, because four-segmented carpo-propodi were not described in the original description by Murano (1977) or in the redescription of the allotype male (NSMT-Cr 5524) by Takahashi & Murano (1986).…”

Mysids (Crustacea) from the Exclusive Economic Zone of India with description of a new species

“…Hitherto, Haplostylus pusillus has been known from three localities, the Red Sea (Coifmann 1937b;Bacescu 1979;Almeida Prado-Por 1980), the Andaman Sea (Pillai 1973;Panampunnayil 2002) and Iriomote Island, Japan (Fukuoka & Murano 1997). From a biogeographical viewpoint, it is interesting to note that the distribution area of the species in the Indian Ocean extends from the Red Sea in the west to the Andaman Sea in the east.…”

“…It has been recorded from the Indian Ocean (Hansen 1910;Pillai 1964;1973), the South China Sea (Ii 1964;Jo 1991), and Japan (Jo 1991;Fukuoka & Murano 1997). Length: mature female 6.8 mm.…”

“…Pseudanchialina pusilla has been recorded from Celebes Sea, Indonesia (Sars 1885), the Bay of Bengal (Hansen 1910), the Great Barrier Reef (W. Tattersall 1936), the Arabian Sea (Pillai 1957(Pillai , 1973, the South China Sea (Wang & Liu 1987), the Malacca Strait (O. Tattersall 1960), southwestern Japan (Fukuoka & Murano 1997), and the Andaman Sea (Panampunnayil 2002).…”