The Antoine Gaubil maps of the Ryukyu Islands and Southern Japan

Imago Mundi ◽  
1955 ◽  
Vol 12 (1) ◽  
pp. 141-149
Author(s):  
Boleslaw SzczeSniak
Keyword(s):  
Ryukyu Islands ◽  
Southern Japan ◽  
The Ryukyu Islands

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.

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.

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.  

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

The cicada genus Muda Distant (Hemiptera: Cicadidae) from Sundaland: species and relationships

2018 ◽  
Vol 161 (3) ◽  
pp. 131-154
Author(s):  
J.P. Duffels
Keyword(s):  
Comparative Study ◽  
Identification Key ◽  
Taxonomic Position ◽  
Ryukyu Islands ◽  
Distribution Maps ◽  
Southern Japan ◽  
The Ryukyu Islands

A diagnosis is provided of the cicada genus Muda Distant, 1897, with descriptions, illustrations and distribution maps for the five species found in Sundaland. Three of these, Muda obtusa (Walker, 1858), M. virguncula (Walker, 1856) and M. tua Duffels, 2004, are redescribed. Muda beccarii (Distant, 1888) and M. concolor Distant, 1897 are junior synonyms of M. virguncula. Abroma tahanensis (Moulton, 1923) is transferred to Muda and redescribed. Muda kinabaluana is described as new to science, and is very peculiar, missing the timbals. An identification key is provided. Characters and taxonomic position of Muda kuroiwae (Matsumura, 1913) from the Ryukyu Islands of southern Japan are discussed. Muda is characterized by two supposed synapomorphies, viz., the mediodorsal carina of the male pygofer and the movable upper pygofer lobes; these characters are also found in species of Katoa. Further comparative study of Muda and Katoa is needed to reveal their relationships.

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