Species-groups
Guides
Amarochara
A genus of rove beetles (Staphylinidae: Aleocharinae: Oxypodini) established by C.G. Thomson in 1858. The genus comprises approximately 25 valid species distributed across the Holarctic region, with the majority described or redescribed in a comprehensive 2002 revision. Holarctic species are organized into five species groups based on phylogenetic analysis, replacing the previous subgeneric classification system.
Amblycerus
pea and bean weevils, seed beetles
Amblycerus is the second most diverse genus of seed beetles in the Americas, containing over 60 described species. These bruchid beetles are specialized seed predators, with larvae developing inside seeds of various host plants. The genus exhibits complex evolutionary patterns of host plant association, having radiated from an ancestral association with Fabaceae into at least 12 other plant families including Sterculiaceae, Boraginaceae, and Humiriaceae. Species-level identification requires examination of male genitalia and pygidial morphology.
Atractodes
Atractodes is a cosmopolitan genus of parasitoid wasps in the family Ichneumonidae, first described by Gravenhorst in 1829. The genus has been historically classified in different subfamilies, with some species groups placed in Phygadeuontinae and others in Cryptinae. Multiple species groups have been defined to accommodate morphologically similar species, particularly in the Neotropical region where recent taxonomic revisions have described numerous new species. The genus exhibits considerable diversity in the Americas, with records from North America, Central America, and South America, as well as Europe.
Geodromicus
Geodromicus is a genus of rove beetles (Coleoptera: Staphylinidae: Omaliinae: Anthophagini) established by Redtenbacher in 1857. The genus is distributed across the Palaearctic region, with species occurring from Western Europe through Central Asia to East Asia. Taxonomic research has organized species into multiple species groups including the bodemeyeri, convexicollis, brevicollis, plagiatus, major, lestevoides, crassipalpis, aokii, and sinuatus groups. The genus has been subject to extensive revision, with numerous synonymies established and several new species described in recent years.
Ommatius
Plumetops
Ommatius is a large and morphologically diverse genus of robber flies (Diptera: Asilidae) within the subfamily Asilinae. The genus contains numerous species distributed across multiple biogeographic regions, with particularly well-documented diversity in the Afrotropical region and the Americas. Species are organized into multiple species groups based on morphological characteristics. Like other Asilidae, members of this genus are predatory as both larvae and adults. The genus has been subject to extensive taxonomic revision due to its high species diversity and complex morphological variation.
Sepedophilus
rove beetles
A genus of small rove beetles in the subfamily Tachyporinae, containing approximately 30 species in North America north of Mexico. Species are distinguished by detailed examination of male and female eighth abdominal sternites and tergites, male genitalia, and other morphological characters. The genus has been subject to extensive taxonomic revision due to historical confusion with related generic names including Conurus, Conosoma, and Conosomus.
Tanytarsus
non-biting midge
Tanytarsus is a large genus of non-biting midges comprising over 480 described species. The genus belongs to the tribe Tanytarsini within the subfamily Chironominae. Larvae occur in diverse freshwater habitats, with some species inhabiting marine environments. Species-level studies reveal complex life cycles with photoperiod and temperature as key determinants of seasonal patterns.