scholarly journals Gastrodia longiflora (Orchidaceae: Epidendroideae: Gastrodieae), a new mycoheterotrophic species from Ishigaki Island, Ryukyu Islands, Japan

Phytotaxa ◽  
2021 ◽  
Vol 502 (1) ◽  
pp. 107-110
Author(s):  
KENJI SUETSUGU
Keyword(s):  
Ryukyu Islands ◽  
Tropical Regions ◽  
Ishigaki Island

Gastrodia Brown (1810: 330; Gastrodieae, Epidendroideae) is a mycoheterotrophic orchid genus distributed in temperate and tropical regions of Asia, Oceania, Madagascar, and Africa (Cribb et al. 2010, Hsu & Kuo 2010, Suetsugu et al. 2018). It is characterized by fleshy tubers, absence of normal leaves, united sepals and petals and two mealy pollinia without caudicles (Cribb et al. 2010, Hsu & Kuo 2010, Hsu et al. 2012, Suetsugu et al. 2018).

Supplementary descriptions of Pergalumna amamiensis Aoki, 1984 (Acariformes, Galumnoidea) from Ryukyu Islands

Zootaxa ◽  
2019 ◽  
Vol 4647 (1) ◽  
pp. 378-384
Author(s):  
WATARU HAGINO ◽  
SATOSHI SHIMANO
Keyword(s):  
Body Length ◽  
Morphological Traits ◽  
Granular Structure ◽  
Surface Pattern ◽  
Ryukyu Islands ◽  
Body Width ◽  
Okinawa Island ◽  
Ishigaki Island ◽  
Circular Surface ◽  
Median Pore

A species of oribatid mites, Pergalumna amamiensis was collected from Amami-Ohshima Island, Ishigaki Island, and Okinawa Island, Southwestern Japan. The specimens were studied in detail, and supplementary descriptions are provided; these include features of the rostrum, the subcapitulum and the surface pattern of pteromorphs. The main morphological traits for this species are summarized as follows; body length 519–570 μm, body width 363–410 μm, rostral tip pointed, sensillus with a long stalk covered by minute barbs, porose areas Aa bulbous, porose areas A1, A2, and A3 circular, surface of pteromorphs ornamented by fine granular structure and dense wrinkles, fine granular structure on prodorsum, subcapitulum, genital plates and anal plates, median pore on the notogaster represented as single pore. 

Influence of wave energy on Holocene coral reef development: an example from Ishigaki Island, Ryukyu Islands, Japan

2003 ◽  
Vol 159 (1-2) ◽  
pp. 27-41 ◽  
Author(s):  
Hiroya Yamano ◽  
Osamu Abe ◽  
Eiji Matsumoto ◽  
Hajime Kayanne ◽  
Nobuyuki Yonekura ◽  
...  
Keyword(s):  
Coral Reef ◽  
Wave Energy ◽  
Ryukyu Islands ◽  
Reef Development ◽  
Ishigaki Island

scholarly journals First record of Australatya obscura Han & Klotz, 2015 (Decapoda, Atyidae) from the Ryukyu Islands, Japan

2019 ◽  
Vol 7 ◽  
Author(s):  
Naoto Inui ◽  
Tomoaki Maruyama ◽  
Ken Okamoto
Keyword(s):  
First Record ◽  
Kuroshio Current ◽  
Ryukyu Islands ◽  
Freshwater Shrimp ◽  
Ishigaki Island ◽  
The Ryukyu Islands ◽  
The Kuroshio

The freshwater shrimp, Australatyaobscura Han & Klotz, has been known only from Taiwan and Panay Island, Philippines. An adult A.obscura was collected from a river on Ishigaki Island, Ryukyu Islands, Japan. This is the first record of the species in Japan and the northernmost specimen-supported record to date. The species is suggested as having been transported northwards by the Kuroshio Current.

scholarly journals A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae)

2017 ◽  
Author(s):  
Anh D. Nguyen ◽  
Zoltán Korsós ◽  
Kuem-Hee Jang ◽  
Ui-Wook Hwang
Keyword(s):  
Sister Group ◽  
Mitochondrial Genes ◽  
Ryukyu Islands ◽  
Key To Species ◽  
Tropical Regions ◽  
Fresh Material ◽  
The Ryukyu Islands ◽  
Species Inquirenda ◽  
The World ◽  
The Status

The genus Oxidus Cook, 1911 is revised to contain five species, O. avia (Verhoeff, 1937), O. gigas (Attems, 1953), O. gracilis (C.L. Koch, 1847), O. riukiaria (Verhoeff, 1940), and “species inquirenda” O. obtusus (Takakuwa, 1942). A cosmopolitan species, O. gracilis, is widely found in temperate and sub-tropical regions over the world, but other species have limited distribution in restricted regions, e.g., O. gigas in northern Vietnam, O. riukiaria and O. avia in the Ryukyu Islands (Japan). Four species, O. gracilis, O. riukiaria, O. avia and O. gigas, are confirmed as different from each other in gonopod characters, coloration and body size. The status of the last species, O. obtusus, is still doubtful and requires examination of further fresh material. The phylogenetic relationships among species of Oxidus is analyzed using two fragments of the mitochondrial genes COI (Cytochrome c Oxidase subunit I) and 16S rRNA. Three species of Oxidus are clearly separated from each other; O. gigas and O. gracilis form a monophyletic sister group with O. riukiaria. The genus Oxidus is also monophyletic and more closely related to the genus Tylopus Jeekel, 1968 than to the genera Sellanucheza Enghoff, Golovatch & Nguyen, 2004 or Kronopolites Attems, 1914. In addition, an identification key to species of Oxidus is provided.

Formation of gas discharging from Taketomi submarine hot spring off Ishigaki Island in the southern Ryukyu Islands, Japan

2017 ◽  
Vol 330 ◽  
pp. 24-35
Author(s):  
Tomohiro Toki ◽  
Daigo Iwata ◽  
Urumu Tsunogai ◽  
Daisuke D. Komatsu ◽  
Yuji Sano ◽  
...  
Keyword(s):  
Hot Spring ◽  
Ryukyu Islands ◽  
Ishigaki Island

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. 

Pollination in Bruguiera gymnorrhiza and Rhizophora mucronata (Rhizophoraceae) in Ishigaki Island, The Ryukyu Islands, Japan

Biotropica ◽  
1987 ◽  
Vol 19 (4) ◽  
pp. 377 ◽  
Author(s):  
Katsuhiko Kondo ◽  
Takehisa Nakamura ◽  
Kouichi Tsuruda ◽  
Noriko Saito ◽  
Yukio Yaguchi
Keyword(s):  
Ryukyu Islands ◽  
Rhizophora Mucronata ◽  
Bruguiera Gymnorrhiza ◽  
Ishigaki Island ◽  
The Ryukyu Islands
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