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Indonesian angelshark : ウィキペディア英語版
Indonesian angelshark

The Indonesian angelshark (''Squatina legnota'') is a rare species of angel shark, family Squatinidae, known only from a few specimens collected from fish landing sites in southern Indonesia. It is thought to inhabit the deep waters of the continental slope. Reaching at least long, this species has a flattened, ray-like shape and a well-developed tail and caudal fin. It is characterized by the absences of fringes on its nasal barbels and thorns down the midline of its back, as well as by its relatively plain grayish-brown dorsal coloration with dark saddles beneath the dorsal fin bases and a black leading margin on the underside of the pectoral fins. The International Union for Conservation of Nature (IUCN) presently lacks sufficient information to assess the conservation status of this species.
==Taxonomy and phylogeny==
The Indonesian angelshark was described by Commonwealth Scientific and Industrial Research Organisation (CSIRO) researchers Peter Last and William White in a 2008 volume of the scientific journal ''Zootoxa'', based on specimens found at several Indonesian fish landing sites. One of the specimens, a long female from the Cilacap landing site in central Java, was designated the holotype. The specific epithet comes from the Greek ''legnotos'' ("having a colored border"), in reference to the dark leading margins of the pectoral fins.
Björn Stelbrink and colleagues' 2010 phylogenetic analysis, based on mitochondrial DNA, found that the sister species of the Indonesian angelshark is the Taiwan angelshark (''S. formosa''); the two were the closest genetically of all the species examined. The pair additionally formed a clade with the Japanese angelshark (''S. japonica'') and the ocellated angelshark (''S. tergocellatoides''), both also Asian species.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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