A new squat lobster species of the genus Munida (Decapoda, Anomura, Munididae) from the deep-sea off the Ryukyu Islands, Japan

Crustaceana ◽  
2017 ◽  
Vol 90 (7-10) ◽  
pp. 969-979
Author(s):  
Tomoyuki Komai
Keyword(s):  
New Species ◽  
Deep Sea ◽  
The Philippines ◽  
Ryukyu Islands ◽  
Single Male ◽  
Okinawa Island ◽  
Male Specimen ◽  
Squat Lobster ◽  
The Ryukyu Islands ◽  
Japanese Waters

Munida michaeli, a new species of deep-sea squat lobster (Munididae), is described and illustrated on the basis of a single male specimen collected off Okinawa Island, Ryukyu Islands, Japan, at depths of 641-650 m. It closely resemblesM. sacksiMacpherson, 1993 known with certainty only from the Philippines, but different spination of the carapace dorsum and the greatly reduced armature of the flexor margins of the ambulatory dactyli distinguish the new species from the latter. With the addition of the present new species, 41 species ofMunidaLeach, 1820 are now known from Japanese waters.

Redescription of a poorly known upogebiid mud shrimp Gebiacantha acanthochela (Sakai, 1967) and description of a new species of the genus from the Ryukyu Islands, Japan (Decapoda: Gebiidea)

Zootaxa ◽  
2020 ◽  
Vol 4881 (2) ◽  
pp. 307-322
Author(s):  
TOMOYUKI KOMAI
Keyword(s):  
New Species ◽  
New Caledonia ◽  
Original Description ◽  
Ryukyu Islands ◽  
Okinawa Island ◽  
The Ryukyu Islands ◽  
Female Holotype ◽  
Mud Shrimp ◽  
Japanese Waters ◽  
Amami Islands

Two species of the upogebiida mud shrimp genus Gebiacantha Ngoc-Ho, 1989, currently represented by 19 described species, are reported from the Ryukyu Islands, Japan. The first, G. acanthochela (Sakai, 1967), is redescribed in detail based on two female specimens from Amami Islands the second discovered since the original description, enabling better assessment of its diagnostic characters. The second, G. fortispinata n. sp., is described on the basis of a single female holotype from Okinawa Island. It appears closest to G. multispinosa Ngoc-Ho, 1994, known with certainty only from New Caledonia, but the proportionally narrower telson with a more deeply notched posterior margin and the distally unarmed pereopod 3 merus distinguish the new species from G. multispinosa. Three species of Gebiacantha, including G. sagamiensis Komai, 2017, are now known from Japanese waters.

Redescription of the pagurid hermit crab Catapaguroides fragilis (Melin, 1939) and descriptions of two new species from deep-sea off the Ryukyu Islands, Japan (Crustacea: Decapoda: Anomura)

Zootaxa ◽  
2017 ◽  
Vol 4273 (2) ◽  
pp. 235
Author(s):  
TOMOYUKI KOMAI
Keyword(s):  
New Species ◽  
Hermit Crab ◽  
Deep Sea ◽  
Distal Portion ◽  
Ryukyu Islands ◽  
Additional Material ◽  
Characteristic Shape ◽  
The Ryukyu Islands ◽  
Two New Species ◽  
Japanese Waters

Three species of the pagurid hermit crab genus Catapaguroides A. Milne-Edwards & Bouvier, 1892, all from Japanese waters, are reported. Catapaguroides fragilis (Melin, 1939) is redescribed on the basis of the holotype and additional material from southern Japan. Diagnostic characters of this poorly known species are fully assessed. Two new species, C. bythos and C. rubromaculatus, are described and illustrated on the basis of material from upper bathyal depths off the Ryukyu Islands. Catapaguroides rubromaculatus n. sp. resembles C. fragilis and C. hirsutus Komai & Rahayu, 2013, but the characteristic shape of the ocular peduncle and the elongate male right sexual tube with an anteriorly directed distal portion readily separate C. rubromaculatus n. sp. from the latter two congeners. Catapaguroides bythos n. sp. appears close to C. mortenseni de Saint Laurent, 1968 and C. pectinipes (Lewinsohn, 1969), but the different armature of the chelipeds distinguishes C. bythos n. sp. from the latter two allies. Catapaguroides is now represented by 30 species. 

A new genus and new species assigned to Macrophthalmidae (Decapoda: Brachyura: Thoracotremata) from the Ryukyu Islands, Japan

Zootaxa ◽  
2018 ◽  
Vol 4531 (1) ◽  
pp. 109 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
YOSHIHISA FUJITA
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Ryukyu Islands ◽  
Single Male ◽  
Male Specimen ◽  
Ishigaki Island ◽  
The Ryukyu Islands ◽  
The Family

Mirograpsus asper is described as a new genus and new species in the subfamily Ilyograpsinae Števčić, 2005, of the family Macrophthalmidae Dana, 1851, on the basis of a single male specimen from Ishigaki Island, Ryukyu Islands, Japan. The new genus most closely resembles the monotypic Apograpsus Komai & Wada, 2008 (type species, Ilyograpsus paantu Naruse & Kishino, 2006), sharing a similar carapace shape, but is differentiated chiefly by the fusion of the male pleomeres 4–6 and the unarmed meri of the ambulatory legs. The functional fusion of the male pleomeres 4–6 is unique in the Macrophthalmidae. 

A new species of the mud shrimp genus Axianassa Schmitt, 1924 (Decapoda: Gebiidea: Laomediidae) from the Ryukyu Islands, southern Japan

Zootaxa ◽  
2019 ◽  
Vol 4658 (3) ◽  
pp. 452-460
Author(s):  
TOMOYUKI KOMAI ◽  
YOSHIHISA FUJITA
Keyword(s):  
New Species ◽  
Rrna Gene ◽  
Ryukyu Islands ◽  
Single Male ◽  
Genetic Studies ◽  
Male Specimen ◽  
The Ryukyu Islands ◽  
Mud Shrimp ◽  
Accessible Habitat ◽  
A New Species

A new species of the laomediid mud shrimp genus Axianassa Schmitt, 1924, A. planioculus, is described and illustrated on the basis of a single male specimen from intertidal muddy sand flat of Kabira Bay, Ishigaki Island, southern Ryukyu Islands, Japan. Axianassa planioculus n. sp. is morphologically closest to A. mineri Boone, 1931, known from Pacific Panama, among the 11 known congeners, but is readily distinguished from the latter by the eyes being dorsally concealed by the rostrum, the subovate telson, the unarmed carpus of the maxilliped 3 and the unarmed uropodal endopod. The discovery of a new mud-shrimp species in an easily accessible habitat indicates that the shallow-water infaunal decapods are still relatively poorly known. A partial segment of the mitochondrial 16S rRNA gene was sequenced from the holotype for future genetic studies.

A new hermit crab species of the genus Catapaguroides A. Milne-Edwards & Bouvier (Crustacea: Decapoda: Anomura: Paguridae) from the Ryukyu Islands, Japan, and additional record of C. foresti McLaughlin

Zootaxa ◽  
2010 ◽  
Vol 2690 (1) ◽  
pp. 32
Author(s):  
TOMOYUKI KOMAI ◽  
YUSUKE YAMADA ◽  
NAOKI SHIRAKAWA
Keyword(s):  
Ryukyu Islands ◽  
Crab Species ◽  
Single Male ◽  
Okinawa Island ◽  
Male Specimen ◽  
General Morphology ◽  
The Ryukyu Islands ◽  
Submarine Cave ◽  
The Right ◽  
Subjective Synonym

Two species of the pagurid genus Catapaguroides A. Milne-Edwards & Bouvier, 1892, C. longior n. sp. and C. foresti McLaughlin, 2002, are reported herein. The new species is described on the basis of a single male specimen collected from a submarine cave at Onna Village, Okinawa Island, Ryukyu Islands, at a depth of 30 m. In general morphology, it is most similar to C. inermis de Saint Laurent, 1968, but is readily distinguished from that species by the elongate antennal acicle and the broad carpus of the right cheliped. Examination of newly collected specimens from Japan led us to conclude that C. kasei Osawa & Takeda, 2004 is a junior subjective synonym of C. foresti McLaughlin, 2002. An emended key to the presently recognized species of the genus is provided.

First record of the genus Dinophasma Uvarov from the Philippines (Phasmatodea: Aschiphasmatidae)

Zootaxa ◽  
2007 ◽  
Vol 1530 (1) ◽  
pp. 33-36 ◽  
Author(s):  
MARCO GOTTARDO
Keyword(s):  
New Species ◽  
First Record ◽  
The Philippines ◽  
Identification Key ◽  
Single Male ◽  
Male Specimen

As presently defined, the genus Dinophasma Uvarov, 1940 (= Dina Redtenbacher, 1906, = Xylobistus Zompro, 2004) includes 8 species (Otte & Brock, 2005), 7 of which are widespread in Borneo and one is represented in India. A study of several unidentified specimens of Philippine Aschiphasmatidae allowed recognition of a single male specimen of Dinophasma that cannot be assigned to any known species. The new species is described and illustrated in the present paper and marks the first record of the genus from the Philippines. An identification key to all species of Dinophasma, revised from that presented by Bragg (2001), is also provided

A new antipatharian-associated species of the genus Cuapetes Clark, 1919 (Crustacea: Decapoda: Palaemonidae) and a new record of C. nilandensis (Borradaile, 1915) from Japan

Zootaxa ◽  
2012 ◽  
Vol 3367 (1) ◽  
pp. 115 ◽  
Author(s):  
JUNJI OKUNO ◽  
TIN-YAM CHAN
Keyword(s):  
New Species ◽  
New Record ◽  
Type Species ◽  
Ryukyu Islands ◽  
The Ryukyu Islands ◽  
Japanese Waters ◽  
Associated Species ◽  
First Time

Two antipatharian-associated species of the pontoniine shrimp genus Cuapetes Clark, C. lanceolatus sp. nov. and C.nilandensis (Borradaile), are reported from the Ryukyu Islands, Japan. The new species appears closest to C. akiensis(Kubo) and C. calmani (Tattersall), but differs considerably from the latter two species in the shape of the rostrum and thelength of upper antennular flagellum. Cuapetes nilandensis, the type species of the genus, is recorded from Japanese waters for the first time.

A new hermit crab species of the genus Catapagurus (Crustacea: Decapoda: Anomura: Paguridae) from the Ryukyu Islands, southern Japan

Zootaxa ◽  
2009 ◽  
Vol 2211 (1) ◽  
pp. 57-68 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
MASAYUKI OSAWA
Keyword(s):  
New Species ◽  
Hermit Crab ◽  
Species Group ◽  
Shallow Waters ◽  
Ryukyu Islands ◽  
Crab Species ◽  
Okinawa Island ◽  
The Ryukyu Islands ◽  
The Family ◽  
A New Species

A new species of the pagurid hermit crab genus Catapagurus A. Milne-Edwards, 1880, C. insolitus, is described and illustrated based on specimens from shallow waters in Okinawa Island, the Ryukyus. It belongs to an informal species group characterized by the possession of blade-shaped ambulatory dactyli, and is morphologically most similar to C. kosugei (Asakura, 2001). However, the new species is unique within the genus in having a multispinose antennal acicle, rarely seen in species of the family Paguridae.

Two large squat lobsters of the superfamily Chirostyloidea (Crustacea: Decapoda: Anomura) from the Ryukyu Islands, southwestern Japan, with description of a new species of the genus Eumunida Smith, 1883

Zootaxa ◽  
2019 ◽  
Vol 4555 (3) ◽  
pp. 319
Author(s):  
MASAYUKI OSAWA ◽  
TAKUO HIGASHIJI
Keyword(s):  
New Species ◽  
Ryukyu Islands ◽  
Deep Waters ◽  
The Ryukyu Islands ◽  
Japanese Waters ◽  
First Time ◽  
A New Species ◽  
Squat Lobsters

Two species of the chirostyloid families Sternostylidae and Eumunididae, Sternostylus investigatoris (Alcock & Anderson, 1899) and Eumunida balteipes n. sp., are reported on the basis of material collected from deep waters off Kume Island, Ryukyu Islands, southwestern Japan. Sternostylus investigatoris is recorded for the first time and is the second species of the genus from Japanese waters. Eumunida balteipes n. sp. is morphologically closest to E. sternomaculata de Saint Laurent & Macpherson, 1990, but the armature of the thoracic sternite 3 and P1 palm distinguishes the two species. 

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