Simorcus asiaticus

Like many crab spiders, this species exhibits pronounced sexual dimorphism, with females being notably larger than males. Females measure 7.78 mm in total body length, while males reach 5.28 mm. The cephalothorax is longer than wide in both sexes, with well-developed tubercles and short, blunt setae. The clypeus is exceptionally wide relative to the eye region. The eye arrangement is characteristic of the family, with the posterior lateral eyes being the largest, followed by the anterior lateral eyes, posterior median eyes, and anterior median eyes being the smallest. The chelicerae are edentate (lacking teeth) and bear strong setae on their dorsal surface. The maxillae are notably elongated and pointed, particularly in females, and feature several blunt setae. The labium is also elongated. The legs are long and slender, bearing only strong hairs without spines. Claw tufts are absent, and the tarsal claws possess 3-5 teeth. The leg formula is I-II-IV-III, indicating that the first legs are longest and the third legs are shortest. The male pedipalp features a distinctive structure with both ventral and retrolateral apophyses on the tibia. The ventral apophysis is long and finger-shaped, while the retrolateral one is well-developed with a sclerotized distal tooth. The tarsus bears five strong prolateral spines and includes a paracymbium. …

S. asiaticus has been recorded from Sanmen County, Zhejiang, China, where the holotype and allotype specimens were collected.