scholarly journals Distributions and Variations of Two Estuarine Species of Composetia (Annelida: Nereididae) in the Ryukyu Islands, Southern Japan, with a New Record of Composetia tokashikiensis from Thailand

2020 ◽  
Vol 25 (1) ◽  
pp. 25-38
Author(s):  
Masanori Sato ◽  
Takumi Ebihara ◽  
Kiyoshi Satake ◽  
Shigeaki Kojima ◽  
Hiroaki Fukumori ◽  
...  
Keyword(s):  
New Record ◽  
Ryukyu Islands ◽  
Estuarine Species ◽  
Southern Japan ◽  
The Ryukyu Islands

A taxonomic review of the genus Physopelta (Hemiptera: Heteroptera: Largidae) from Japan, Korea, and Taiwan, with a new record of Ph. parviceps from China

Zootaxa ◽  
2021 ◽  
Vol 4951 (3) ◽  
pp. 461-491
Author(s):  
JUN SOUMA ◽  
TADASHI ISHIKAWA
Keyword(s):  
New Species ◽  
New Record ◽  
Guangdong Province ◽  
Zhejiang Province ◽  
Ryukyu Islands ◽  
Taxonomic Review ◽  
The Ryukyu Islands ◽  
Two New Species ◽  
Central Taiwan ◽  
First Time

In this paper, we revised the physopeltine genus Physopelta Amyot & Serville, 1843 (Hemiptera: Heteroptera: Largidae) from Japan, Korea, and Taiwan. Five species were recognized and diagnosed, including two new species, Ph. (Neophysopelta) lutaspidata sp. nov. from northern and central Taiwan and Ph. (N.) fusciscutellata sp. nov. from the Ryukyu Islands, Japan and Taiwan, and three known species, Ph. (N.) gutta gutta (Burmeister, 1834), Ph. (N.) parviceps Blöte, 1931, and Ph. (N.) quadriguttata Bergroth, 1894. Physopelta (Neophysopelta) fusciscutellata sp. nov., was previously regarded as either of the two species, Ph. (N.) cincticollis Stål, 1863 and Ph. (N.) parviceps, for populations from Taiwan. Previous records of Ph. (N.) cincticollis from Japan proper and Korea, and Ph. (N.) slanbuschii (Fabricius, 1787) from the Ryukyu Islands were considered as misidentifications of Ph. parviceps. A key to facilitate the identification of the five species known in Japan, Korea, and Taiwan is provided. Additionally, Ph. (N.) parviceps is recorded from China (Guangdong Province and Zhejiang Province) for the first time. 

Spatial distribution of chaetodontid fish in coral reefs of the Ryukyu Islands, southern Japan

1999 ◽  
Vol 79 (4) ◽  
pp. 725-735 ◽  
Author(s):  
L. Cadoret ◽  
M. Adjeroud ◽  
M. Tsuchiya
Keyword(s):  
Species Richness ◽  
Coral Reefs ◽  
Reef Slope ◽  
Data Matrix ◽  
Ryukyu Islands ◽  
Southern Japan ◽  
The Ryukyu Islands ◽  
The World ◽  
Species Richness And Abundance ◽  
Reef Edge

The spatial patterns of butterflyfish assemblages (Chaetodontidae) were examined within and between five islands of the Ryukyu Archipelago, southern Japan. Despite being the northernmost reef communities in the world and despite the severe natural and human-induced disturbances that have affected them since the 1970s, the coral reefs of the Ryukyu Islands have one of the most diversified assemblages of chaetodontids in the world. A total of 30 species were identified, and species richness per island ranged from 20 to 25 species. On each of the 45 stations prospected, between four and 17 species were recorded, and between 0.75 and 21.75 ind 250 m−2 were counted. Variation in species composition, species richness and abundance between islands was less pronounced than the variation within islands, where assemblages of the major reef environments (i.e. the reef flat, the reef edge, and the reef slope) were distinguished. The highest species richness and abundance were found on the reef slope and the reef edge. Canonical correspondence analysis revealed that depth, substrate complexity, and live coral cover influenced the distribution of chaetodontid fishes. These factors accounted for 20% of the variation in the species data matrix.

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.

On Two New Species of Geothelphusa Stimpson, 1858 (Decapoda, Brachyura, Potamidae) From the Ryukyu Islands, Japan

Crustaceana ◽  
1998 ◽  
Vol 71 (7) ◽  
pp. 778-784 ◽  
Author(s):  
J.-Y. Shy ◽  
Peter K.L. Ng
Keyword(s):  
New Species ◽  
Type Locality ◽  
Ryukyu Islands ◽  
Freshwater Crabs ◽  
Southern Japan ◽  
The Ryukyu Islands ◽  
Two New Species

AbstractTwo new species of potamid freshwater crabs of the genus Geothelphusa are described from the Ryukyu Islands in southern Japan. Although both G. shokitai sp. nov. and G. minei sp. nov. are allied to G. candidiensis (type locality Taiwan), they differ from that species and from each other in the form of their carapaces, ambulatory leg proportions, and structure of their male first pleopods.

Taxonomic study of the Japanese species of the genus Salka Dworakowska (Hemiptera, Cicadellidae, Typhlocybinae)

Zootaxa ◽  
2012 ◽  
Vol 3281 (1) ◽  
pp. 22
Author(s):  
NAOMICHI OHARA
Keyword(s):  
New Species ◽  
Ryukyu Islands ◽  
Taxonomic Study ◽  
Japanese Species ◽  
Southern Japan ◽  
The Ryukyu Islands

Eight new species of the erythroneurine genus Salka are described and illustrated from the Ryukyu Islands, southern Japan: S.denticulata sp. nov., S. circumflexa sp. nov., S. okinawana sp. nov., S. diversa sp. nov., S. dimorpha sp. nov., S. maesatoensis sp. nov., S. nusukuensis sp. nov. and S. trimaculata sp. nov.

Redescription of the brackish water crab Ptychognathus glaber Stimpson, 1858 based on the topotypic material from the Ogasawara Islands and new record of P. lipkei N.K. Ng, 2010 from Japan (Decapoda: Brachyura: Varunidae)

Zootaxa ◽  
2021 ◽  
Vol 5048 (1) ◽  
pp. 58-76
Author(s):  
TOMOYUKI KOMAI ◽  
TADAFUMI MAENOSONO ◽  
TOSHIFUMI SAEKI ◽  
TOHRU NARUSE
Keyword(s):  
16S Rrna ◽  
Genetic Analysis ◽  
16S Rrna Gene ◽  
New Record ◽  
The Philippines ◽  
Rrna Gene ◽  
Ryukyu Islands ◽  
Ogasawara Islands ◽  
The Ryukyu Islands ◽  
Mitochondrial 16S Rrna Gene

Examination of material from various Japanese localities clarified that the estuarine crab Ptychognathus glaber Stimpson, 1858 is possibly restricted to the Ogasawara Islands, Japan. Specimens from the Ryukyu Islands, thought to represent P. glaber, actually represent P. lipkei N.K. Ng, 2010 instead, previously known only from Cebu, the Philippines. Ptychognathus glaber is redescribed in detail, and differentiating characters between it and P. lipkei are reassessed. Previous literature records of P. glaber are reviewed in the light of our findings. Genetic analysis using partial sequences of the mitochondrial 16S rRNA gene suggests that P. glaber is genetically closer to P. ishii Sakai, 1939 than to P. lipkei, and thus P. ishii is also compared morphologically with P. glaber.  

Callogobius falx, a new species of goby from southern Japan

Zootaxa ◽  
2021 ◽  
Vol 5048 (2) ◽  
pp. 253-264
Author(s):  
KYOJI FUJIWARA ◽  
TOSHIYUKI SUZUKI ◽  
HIROYUKI MOTOMURA
Keyword(s):  
New Species ◽  
Ryukyu Islands ◽  
Pectoral Fin ◽  
Body Depth ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Southern Japan ◽  
The Ryukyu Islands ◽  
Fin Rays ◽  
Pelvic Fin

Callogobius falx n. sp. (Gobiidae) is described on the basis of two specimens (14.4 and 23.1 mm in standard length: SL) from the Ryukyu Islands, southern Japan. The new species is characterized by the following combination of characters: dorsal-fin rays VI-I, 8 or 9; anal-fin rays I, 7; pectoral-fin rays 18 or 19; lateral scale rows 20–22; body depth moderate, neither particularly slender nor deep (depth at pelvic-fin origin 18.3–20.0% of SL); pelvic-fin base with frenum; caudal-fin length moderate, margin rounded; cephalic sensory-canal pores absent; interorbital papillae row separated, forming two rows (one row in 14.4 mm paratype); postorbital papillae row not continuous with upper cranial papillae row; preopercular and transverse opercular papillae rows connected, forming single transverse row; body with three oblique black bars, angled upwards anteriorly and continuous with black bars on dorsal fins, anteriormost bar extending from 1st dorsal fin to midline of body, posterior two bars extending from second dorsal fin to dorsal surface of body and caudal peduncle, respectively; pectoral fin white, upper half widely (ca. 1/2 length of rays) margined with black; caudal-fin base with narrow sickle-like bar.  

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