The described female has a dark brown carapace with a hint of red.
The legs are brown, becoming darker towards the tips, with ring markings.
Female Selenops huetocatl have long legs. The female described in detail measures 13.13 millimetres in body length, excluding the legs, while her second leg measures 27 millimetres. Tufts of hairs surround the claws at the ends of all eight legs.
When the species was described in 2011, its size inspired its name. According to the original etymology, huetocatl combines the local words huei, meaning large, and tocatl, meaning spider. Its name links a physical feature with words from the region.
One female specimen also preserves a small part of the spider’s growth history. Collected at Pueblo Nuevo Solistahuacan on 17 September, she was noted to moult into adulthood on 20 September. Found beneath the bark of a felled pine, this individual became one of the specimens examined after her adult moult.
An extinction-risk assessment has not been added yet.
The 2011 revision documents specimens from forests in Chiapas. CONABIO, Mexico’s public biodiversity commission, identifies illegal logging, fire and clearance for farming, livestock, roads and other development as threats to the cloud-forest ecosystem used by this spider. Examining how forest and under-bark habitats persist around historical collecting localities, together with renewed surveys for the species, could help guide conservation.