Acanthogonatus nahuelbuta

Acanthogonatus nahuelbuta is a mygalomorph spider of Chile, named after its type locality: Piedra del Águila, Parque Nacional Nahuel-Buta, Malleco.[1] 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.

Acanthogonatus nahuelbuta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Mygalomorphae
Family: Nemesiidae
Genus: Acanthogonatus
Species:
A. nahuelbuta
Binomial name
Acanthogonatus nahuelbuta
Goloboff, 1995

Description
  • Male: total length 13.38 millimetres (0.527 in); cephalothorax length 5.26 millimetres (0.207 in), width 3.34 millimetres (0.131 in); cephalic region length 4.52 millimetres (0.178 in), width 2.72 millimetres (0.107 in); medial ocular quadrangle (OQ) length 0.63 millimetres (0.025 in), width 1.11 millimetres (0.044 in); fovea width 0.67 millimetres (0.026 in); labium length 0.51 millimetres (0.020 in), width 1.03 millimetres (0.041 in); sternum length 2.97 millimetres (0.117 in), width 2.44 millimetres (0.096 in). 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.[1]
  • Female: total length 17.54 millimetres (0.691 in); cephalothorax length 6.19 millimetres (0.244 in), width 5.29 millimetres (0.208 in); cephalic region length 4.14 millimetres (0.163 in), width 3.84 millimetres (0.151 in); fovea width 0.76 millimetres (0.030 in); OQ length 0.61 millimetres (0.024 in), width 1.25 millimetres (0.049 in); labium length 0.67 millimetres (0.026 in), width 1.19 millimetres (0.047 in);sternum length 1.75 millimetres (0.069 in), width 1.55 millimetres (0.061 in). 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.[1]

Distribution

Provinces of Bío-Bío and Malleco, in Region VIII, Chile.

References
  1. 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).
  • "Acanthogonatus nahuelbuta". Integrated Taxonomic Information System.
  • ADW entry
  • "Acanthogonatus nahuelbuta" at the Encyclopedia of Life


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