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Hypochilus kastoni
Hypochilus kastoni is a species of lampshade spider in the family Hypochilidae, described by Norman Platnick in 1987. It is one of several species in the genus Hypochilus, a group of spiders notable for their distinctive web architecture and relictual distribution in North America. The species is known from the western United States, where it inhabits rocky habitats. Like other Hypochilus species, it constructs characteristic flat, circular webs with a conical retreat, resembling a lampshade in appearance.
Hyptiotes
Triangle Web Spiders, Triangle Spiders
Hyptiotes is a genus of small cribellate spiders in the family Uloboridae, commonly known as triangle web spiders. These arachnids are distinguished by their unique triangular webs—rudimentary orb webs consisting of four radii connected to a single anchor thread. They are notable as the only spiders in North America that lack venom glands, relying instead on specialized silk to capture and subdue prey. Adult females measure 3-4 mm, while males are 2-3 mm. Four species occur in North America, with three primarily western and one eastern species (H. cavatus).
Nigma
Nigma is a genus of cribellate araneomorph spiders in the family Dictynidae, established by Pekka T. Lehtinen in 1967. The genus contains approximately fourteen species distributed across Eurasia, North America, and Northern Africa. Members are generally small, with N. walckenaeri being among the largest in the family at up to 5 mm body length. The genus is part of the marronoid spider group, which has been subject to recent phylogenetic revision using genetic data from museum specimens.
Wagneriana
Wagneriana is a genus of orb-weaver spiders in the family Araneidae, first described by F. O. Pickard-Cambridge in 1904. The genus contains at least 29 species distributed across the Neotropical region, from the southern United States through Central America and into South America. Species in this genus construct typical orb webs for prey capture. The genus was revised by Levi in 1991, who described the majority of currently recognized species.