Acanthogonatus hualpen is a mygalomorph spider of Chile, named after its type locality: Hualpén, Concepción, Bío Bío Region.[1] Males can be distinguished from those of A. nahuelbuta and A. patagallina by the shaped of the bulb's apex, and by the palpal tibia being wide in the basal two-thirds (tapering abruptly at the apex) with thickened setae along the apical one-third of the retrolateral face (instead of two-thirds).
Description
- Male: total length 9.42 millimetres (0.371 in); cephalothorax length 4.08 millimetres (0.161 in), width 3.25 millimetres (0.128 in); cephalic region length 2.66 millimetres (0.105 in), width 1.92 millimetres (0.076 in); medial ocular quadrangle (OQ) length 0.45 millimetres (0.018 in), width 0.84 millimetres (0.033 in); labium length 0.34 millimetres (0.013 in), width 0.79 millimetres (0.031 in); sternum length 1.2 millimetres (0.047 in), width 0.99 millimetres (0.039 in). Its labium and maxillae possess no cuspules; its maxillae have thickened setae on their anterior inner corner. A serrula is present. Its sternum and sigilla resemble those in A. nahuelbuta. Chelicerae: rastellum is absent. Cheliceral tumescence is small, with a ventral protuberance. Leg I and its tibial apophysis is similar to that of A. Nahuelbuta, while its metatarsus is straight. Its color is also as in A. Nahuelbuta.[1]
- Female: total length 12.5 millimetres (0.49 in); cephalothorax length 4.90 millimetres (0.193 in), width 3.92 millimetres (0.154 in); cephalic region length 3.32 millimetres (0.131 in), width 2.6 millimetres (0.10 in); fovea width 0.62 millimetres (0.024 in); OQ length 0.49 millimetres (0.019 in), width 0.95 millimetres (0.037 in); labium length 0.47 millimetres (0.019 in), width 0.85 millimetres (0.033 in);sternum length 2.52 millimetres (0.099 in), width 2.27 millimetres (0.089 in). Its cephalic region is convex, with the fovea slightly procurved. Its labium possesses 1 cuspule. A well-developed serrula is present. Its sternal sigilla is small, shallow and marginal. Chelicerae: rastellum is absent. Color as in male.[1]
Distribution
Only in its type locality.
References
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^ a b c 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).
