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Acanthogonatus nahuelbuta : ウィキペディア英語版 | Acanthogonatus nahuelbuta
''Acanthogonatus nahuelbuta'' is a mygalomorph spider of Chile, named after its type locality: Piedra del Águila, Parque Nacional Nahuel-Buta, Malleco.〔Goloboff, Pablo A. "A revision of the South American spiders of the family Nemesiidae (Araneae, Mygalomorphae). Part 1, Species from Peru, Chile, Argentina, and Uruguay. Bulletin of the AMNH; no. 224." (1995).〕 Males differ from ''A. patagallina'' by having the basal portion of the bulb less rounded and the basal loop of the bulbal duct less sinuous; and from those of ''A. hualpen'' by the differently shaped embolus and the palpal tibia with the apical two-thirds (instead of its apical one-third) tapering gradually and having thickened setae. ==Description==
*Male: total length ; cephalothorax length , width ; cephalic region length , width ; medial ocular quadrangle (OQ) length , width ; fovea width ; labium length , width ; sternum length , width . Its labium possesses no cuspules. A serrula is present. Its sternal sigilla is small, oval and submarginal, while its sternum is strongly rebordered. Chelicerae: rastellum is absent. A small, pallid and protruding cheliceral tumescence is present. Colour as in female.〔 *Female: total length ; cephalothorax length , width ; cephalic region length , width ; fovea width ; OQ length , width ; labium length , width ;sternum length , width . Its cephalic region is strongly convex, with a sinuous fovea with short posterior medial notch. Its labium possesses 2 cuspules. A serrula is present. Sternal sigilla is small and oval, while its sternum is rebordered. Chelicerae: rastellum is absent. Its cephalothorax and legs are a reddish brown colour, while its abdomen is yellowish and densely mottled with dark brown.〔
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