Small-genus
Guides
Agnyphantes
Agnyphantes is a genus of dwarf spiders (family Linyphiidae) containing only two species: A. arboreus and A. expunctus. The genus was established by J. E. Hull in 1932. These spiders belong to the sheet-web weaving spiders, though specific details about their biology remain poorly documented.
Itolia
Itolia is a small genus of robber flies (family Asilidae) containing five described species. The genus was established by Wilcox in 1936. Species within Itolia are distributed in North America, with records from the southwestern United States and Mexico. Like other asilids, members of this genus are predatory flies, though specific natural history details remain poorly documented.
Litopyllus
Litopyllus is a genus of ground spiders in the family Gnaphosidae, established by R. V. Chamberlin in 1922. The genus contains three described species: L. cubanus, L. realisticus, and L. temporarius. Members are classified as wandering hunters rather than web-builders.
Nannodioctria
Nannodioctria is a genus of robber flies (family Asilidae) established by Wilcox and Martin in 1942. It is currently treated as a synonym of Dioctria, specifically as the subgenus Dioctria (Nannodioctria). The genus belongs to the subfamily Dioctriinae, a group of small, often slender robber flies. Very few observations or specimens have been documented, with only a single iNaturalist observation recorded.
Negastrius arnetti
Arnett's Click Beetle
Negastrius arnetti is a species of click beetle in the family Elateridae, described by Stibick in 1991. The species is endemic to Canada, with records from five provinces. As a member of the genus Negastrius, it belongs to a group of small click beetles often associated with moist habitats. The common name honors the prominent coleopterist Ross H. Arnett Jr.
Passandrophloeus
Passandrophloeus is a genus of small beetles in the family Laemophloeidae, established by Kessel in 1921. The genus contains five described species, all described by Grouvelle: P. belli, P. ditomoides, P. falcidens, P. glabriculus, and P. spinosus. The genus is currently listed as taxonomically doubtful in some databases, indicating potential issues with its circumscription or validity relative to related genera. Members of Laemophloeidae are generally associated with dead wood and fungal habitats.
Psomus
Psomus is a genus of true weevils in the beetle family Curculionidae, established by Thomas L. Casey in 1892. The genus contains five described species distributed in North America. Species within this genus are small weevils with limited published ecological or biological information available.
Talponia
Talponia is a genus of tortricid moths established by Heinrich in 1926. The genus comprises two described species: Talponia batesi and Talponia plummeriana. It belongs to the subfamily Olethreutinae and tribe Grapholitini. Members of this genus are small moths with limited published documentation of their biology.
Telonaca
Telonaca is a small genus of treehoppers (family Membracidae) comprising two described species: Telonaca alta and Telonaca ramona. It belongs to the tribe Telamonini within the subfamily Smiliinae, a group characterized by pronounced pronotal modifications. The genus was established by Ball in 1918. Members of this genus exhibit the enlarged, often elaborately shaped pronotum typical of their family, which serves various ecological functions including camouflage and predator deterrence.
Yabisi
Yabisi is a genus of tree trunk spiders in the family Hersiliidae, described in 2004 by Rheims & Brescovit. The genus contains two species, Y. guaba and Y. habanensis, both found in North America. Members of this genus are associated with tree trunks, consistent with the ecology of Hersiliidae.