Acanthogonatus huaquen

Female: total length 23.6 millimetres (0.93 in); cephalothorax length 9.21 millimetres (0.363 in), width 7.45 millimetres (0.293 in); cephalic region length 5.55 millimetres (0.219 in), width 5.5 millimetres (0.22 in); fovea width 0.93 millimetres (0.037 in); medial ocular quadrangle (OQ) length 0.82 millimetres (0.032 in), width 1.53 millimetres (0.060 in); labium length 1.01 millimetres (0.040 in), width 1.56 millimetres (0.061 in); sternum length 4.82 millimetres (0.190 in), width 3.83 millimetres (0.151 in). Its cephalic region is convex. Its labium possesses 2 cuspules. A well-developed serrula is present. Its sternal sigilla is submarginal and long, and its sternum is weakly rebordered. Chelicerae: rastellum formed by attenuate setae. It is coloured as the male. Male: total length 15.27 millimetres (0.601 in); cephalothorax length 6.87 millimetres (0.270 in), width 5.38 millimetres (0.212 in); cephalic region length 4.33 millimetres (0.170 in), width 3.09 millimetres (0.122 in); OQ length 0.59 millimetres (0.023 in), width 1.18 millimetres (0.046 in); labium length 0.67 millimetres (0.026 in), width 1.61 millimetres (0.063 in); sternum length 3.6 millimetres (0.14 in), width 2.74 millimetres (0.108 in). Its labium has 2 very small cuspules. A well-developed serrula is present. Its sternal sigilla is small, shallow and oval, and its sternum is strongly rebordered. …

With A. campanae and A. pissii, A. huaquen is one of the most common spiders of the genus in central Chile (Regions IV and V). It has not been found in Region Metropolitana, where A. quilocura seems to replace it.

Goloboff (1995) states there may be more than one species included in his description study. Specimens from Quereo and Caleta Oscura were observed to have longer, spiraled spermathecal ducts; they may represent a different species. This species builds open burrows, lined with a dense layer of silk. The silk lining elongates to the burrow's entrance forming a sort of collar; the burrows are up to 2 centimetres (0.79 in) in diameter, and between 20 and 25 centimetres (7.9 and 9.8 in) deep. In forest ecosystems, the spider prefers more forested parts (not necessarily too moist); they are very common in the open grassland.