scholarly journals A rare alpheid shrimp Aretopsis amabilis De Man from the Ryukyu Islands (Decapoda, Crustacea)

10.5109/22760 ◽  
1967 ◽  
Vol 14 (2) ◽  
pp. 267-273
Author(s):  
Sadayoshi Miyake ◽  
Yasuhiko Miya
Keyword(s):  
Ryukyu Islands ◽  
The Ryukyu Islands ◽  
De Man ◽  
Alpheid Shrimp

A new species of the axiid shrimp genus Manaxius Kensley, 2003 (Decapoda: Axiidea) from shallow coral reefs of the western Pacific

Zootaxa ◽  
2020 ◽  
Vol 4858 (4) ◽  
pp. 507-520
Author(s):  
TOMOYUKI KOMAI ◽  
ARTHUR ANKER
Keyword(s):  
New Species ◽  
Coral Reefs ◽  
French Polynesia ◽  
Dorsal Margin ◽  
Ryukyu Islands ◽  
Society Islands ◽  
The Ryukyu Islands ◽  
Female Holotype ◽  
De Man ◽  
A New Species

Manaxius paullus, a new species of axiid burrowing shrimp, is described on the basis of a female holotype from the Society Islands, French Polynesia, and a female paratype from the Ryukyu Islands, Japan. Both specimens were collected on shallow coral reefs. The new species is morphologically closest to five of 17 congeners, viz., M. euophthalmus (de Man, 1905), M. izuensis (Komai, 2011), M. mimasensis (Sakai, 1967), M. poupini (Komai, 2016) and M. supia Poore, 2020, but can be separated from all of them by the rostrum being relatively broad and with one pair of lateral spines, in addition to a pair of supraocular spines; the presence of a subdistal spine on the dorsal margin of the cheliped ischium; the presence of additional three or four small spines on each cheliped palm, adjacent to the dorsal margin; and the lack of a spine near the base of the fingers of each cheliped palm. 

Redescription of the poorly known ghost shrimp species, Scallasis amboinae Bate, 1888, review of the genus, and description of a new species from the Ryukyu Islands, Japan (Decapoda: Axiidea: Callianassidae)

Zootaxa ◽  
2020 ◽  
Vol 4766 (3) ◽  
pp. 401-420
Author(s):  
TOMOYUKI KOMAI ◽  
GARY C. B. POORE ◽  
YOSHIHISA FUJITA
Keyword(s):  
New Species ◽  
Papua New Guinea ◽  
New Guinea ◽  
Ryukyu Islands ◽  
Shrimp Species ◽  
Ghost Shrimp ◽  
The Ryukyu Islands ◽  
New Material ◽  
De Man ◽  
A New Species

A poorly known callianassid ghost shrimp species, Scallasis amboinae Bate, 1888, is redescribed and illustrated on the basis of the holotype and new material from Papua New Guinea. A new species, S. inermis, is described from the Ryukyu Islands, Japan. Callianassa (Cheramus) pygmaea De Man 1928 is synonymised with S. amboinae. All seven species of Scallasis are diagnosed and compared. 

A new genus and new species of alpheid shrimp from a marine cave in the Ryukyu Islands, Japan, with additional record of Salmoneus antricola Komai, Yamada & Yunokawa, 2015 (Crustacea: Decapoda: Caridea)

Zootaxa ◽  
2018 ◽  
Vol 4369 (4) ◽  
pp. 575 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
YOSHIHISA FUJITA
Keyword(s):  
New Species ◽  
New Genus ◽  
Original Description ◽  
Ryukyu Islands ◽  
New Taxon ◽  
Monotypic Genus ◽  
Diagnostic Characters ◽  
The Ryukyu Islands ◽  
Minor Form ◽  
Alpheid Shrimp

Two species of alpheid shrimp collected from a marine cave off Ie Island, Okinawa Islands, Ryukyu Islands, Japan, are reported. Caligoneus cavernicola n. gen., n. sp., is described on the basis of six specimens, including two ovigerous individuals. The new monotypic genus shares a number of features with Salmoneus Holthuis, 1955 and Triacanthoneus Anker, 2010; however, the dorsally elevated rostrum and the symmetrical pereopods 1 (= chelipeds) of “minor form” distinguish Caligoneus n. gen. from the latter two genera. Other potentially diagnostic characters between the new genus and the latter two genera are also discussed. The new taxon is clearly adapted to stygobiotic environments, with its reduced cornea and very slender elongate pereopods. In addition, two complete specimens of Salmoneus antricola Komai, Yamada & Yunokawa, 2015, collected in the same cave, supplement the original description of the species, which was based on a unique holotype with a damaged telson. 

Hippolytidae and Barbouriidae (Decapoda: Caridea) collected during the Ryukyu “KUMEJIMA 2009” expedition

Zootaxa ◽  
2012 ◽  
Vol 3367 (1) ◽  
pp. 95 ◽  
Author(s):  
SAMMY DE GRAVE ◽  
TIN-YAM CHAN ◽  
Y. FUJITA ◽  
JUNJI OKUNO
Keyword(s):  
New Caledonia ◽  
Present Report ◽  
The Other ◽  
Ryukyu Islands ◽  
Female Specimen ◽  
Single Female ◽  
Male Specimen ◽  
The Ryukyu Islands ◽  
De Man ◽  
First Time

The present report deals with caridean shrimps from the families Hippolytidae (7 species) and Barbouriidae (1 species)collected during the KUMEJIMA 2009 expedition in the Ryukyu Islands. The deep-water hippolytid Gelastreutescrosnieri Bruce, 1990 is recorded from Kumejima based on a single female specimen, representing a considerable rangeextension of this species from New Caledonia to Japan. The opportunity is also taken to record and illustrate the firstknown male specimen of G. crosnieri, collected during the SANTO 2006 expedition off West Mavéa Island, Vanuatu. Thecolour pattern of G. crosnieri is shown for the first time. The Kumejima and Vanuatu specimens present noticeabledifferences in both morphology and colouration, but appear to be conspecific based on comparison of the barcoding geneCOI sequences. The recently described Lysmata lipkei Okuno & Fielder, 2010 is recorded for the second time, however,not representing a significant range extension of this species. The other species reported are Saron marmoratus (Olivier,1811), Saron neglectus De Man, 1902, Thinora maldivensis (Borradaile, 1915), Thor amboinensis (De Man, 1888), Tozeuma armatum Paul’son, 1875 (Hippolytidae), and Parhippolyte misticia (Clark, 1989) (Barbouriidae).

A new species of alpheid shrimp tentatively assigned to Salmoneus Holthuis, 1955 (Decapoda: Caridea) from the Ryukyu Islands, Japan

Zootaxa ◽  
2021 ◽  
Vol 4920 (2) ◽  
pp. 287-296
Author(s):  
TOMOYUKI KOMAI ◽  
TADAFUMI MAENOSONO ◽  
TOHRU NARUSE
Keyword(s):  
New Species ◽  
Dorsal Spine ◽  
Ryukyu Islands ◽  
Seagrass Beds ◽  
Shrimp Species ◽  
Soft Sediments ◽  
Iriomote Island ◽  
The Ryukyu Islands ◽  
A New Species ◽  
Alpheid Shrimp

A new alpheid shrimp species, provisionally assigned to the genus Salmoneus Holthuis, 1955, is described and illustrated on the basis of three specimens extracted from intertidal soft sediments on seagrass beds at Iriomote Island, southern Ryukyu Islands, Japan. Salmoneus singularis n. sp. is highly distinctive within the genus in having a pair of postorbital spines on the carapace, otherwise showing some affinities to the species of the S. gracilipes Miya, 1972 group. The possession of paired spines on the dorsolateral surface of the carapace is shared with several members of Triacanthoneus Anker, 2010, which is undoubtedly closely related to Salmoneus. However, the new species cannot be placed in Triacanthoneus because of the absence of a mid-dorsal spine on the carapace. 

Monthly Water Exchange through the Ryukyu Islands Revealed by Salinity Structural Changes

2013 ◽  
Vol 864-867 ◽  
pp. 2335-2339
Author(s):  
Ya Pan Liu ◽  
Jian Cheng Kang ◽  
Jiong Zhu ◽  
Qin Chen Han
Keyword(s):  
Structural Changes ◽  
Water Exchange ◽  
High Salinity ◽  
World Ocean ◽  
Core Layer ◽  
Ryukyu Islands ◽  
High Salinity Water ◽  
The Ryukyu Islands ◽  
Salinity Water ◽  
World Ocean Atlas

Using salinity database of World Ocean Atlas 2009 (WOA09) issued by NOAA in 2010, refer the range of high-salinity tongue to indicate the strength about high-salinity water, from the perspective of structural changes of salinity; the water exchange through Ryukyu Islands upper 500 m have been analyzed, the results show that: due to Ryukyu Trough, currents on both sides of Ryukyu Islands occur exchange, for upper 500 m, high-salinity water in east of the Ryukyu Islands mainly invade the west waterthe Kuroshio in East China Sea; the intrusion strength is powerful from the depth of 100 m to 200 m, and the 150 m layer is the core layer of high-salinity water intrusion; the high-salinity water at the east of Ryukyu Islands invades the Kuroshio are stronger in March, May, June, September, October and November, are weaker in April and December.

The comparative yields of two types of leucaena (Peruvian v. Hawaiian) grown for forage production in Ryukyu Islands

1986 ◽  
Vol 106 (3) ◽  
pp. 623-624 ◽  
Author(s):  
Y. Kitamura
Keyword(s):  
Leucaena Leucocephala ◽  
Ryukyu Islands ◽  
Forage Production ◽  
High Quality ◽  
The Ryukyu Islands

Leucaena leucocephala (Lam.) de Wit, a leguminous shrub, has come into use as a fodder plant for animals in the Ryukyu Islands as it provides highly palatable, high quality feed (Kitamura, 1985). It is superior to other feeds available in this regard (Higashiohmine, Aramoto & Yamashiro, 1971; Isa et al. 1982).

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