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Acanthogonatus mulchen : ウィキペディア英語版 | Acanthogonatus mulchen
''Acanthogonatus mulchen'' is a mygalomorph spider of Chile, named after its type locality: Alto Caledonia, east of Mulchén, Region VIII (Bío Bío Region).〔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).〕 It is recognised by the long, narrow sternum. It differs from ''A. tolhuaca'' in the spermathecae having a less pronounced notch and the glandular areas on each side joining in the middle. It is larger (''A. mulchen'' has a cephalothorax length of up to , and a total length of ), and differs from ''A. brunneus'' by its uniformly colored abdomen. ==Description==
*Female: total length ; cephalothorax length , width ; cephalic region length , width ; fovea width ; medial ocular quadrangle length , width ; labium length , width ; sternum length , width . Its cephalic region is wide but low, while its fovea s straight to procurved with recurved ends, containing no posterior notch. Its labium possesses 2 cuspules. A serrula is present as a small patch of teeth only on the anterior face of the lobe. Its sternal sigilla is deep and long. Chelicerae: rastellum is absent. The entire spider is a uniform blackish-reddish brown colour, except for one lighter spot in front of the abdomen. Juveniles have a similar color, but lighter, with diagonal lines of pale dots on the dorsum of their abdomen.〔
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