Thomisus guadahyrensis

Like in many crab spider species, females are significantly larger than males, with a total length of 8.3 mm compared to 2.3 mm in males. The cephalothorax measures 3.1 mm in length and width in females, while the opisthosoma reaches 6.3 mm in length and 6.0 mm in width. A key identifying feature is the distinctive shape of the ocular region, which resembles that of other spiders in the genus Thomisus. The species can be distinguished from other crab spiders by this characteristic eye arrangement and its unique geographical distribution.

Females. The cephalothorax displays distinctive coloration with reddish sides, particularly dark at the front, and lighter coloration at the rear. The area containing the median eyes and the forehead is also reddish, while the upper part shows large eye tubercles and a whitish stripe running from these tubercles to the forehead. The whitish chelicerae are entirely reddish on the inner surface, and the red-bordered maxillae, lips, sternum, pedipalps, and legs are dark yellow. The front pairs of legs are somewhat lighter than the rear pairs, with reddish coloration at the end of the metatarsi, tip, and beginning of the tibiae, as well as a reddish spot above the coxae. …

Thomisus guadahyrensis has been recorded from Peru, specifically from »Guadahyra and San Malu at an elevation of 10,000 feet« (approximately 3,000 meters). The type specimens were deposited in the collection of the University of Warsaw.