Horn-1870
Guides
Calosoma haydeni
Hayden's caterpillar hunter
Calosoma haydeni is a ground beetle species in the family Carabidae, described by Horn in 1870. It belongs to the genus Calosoma, commonly known as caterpillar hunters. Adults are brachypterous (short-winged), which limits their flight capability. The species occurs in Mexico and the southern United States, with two recognized subspecies showing distinct geographic distributions.
Conibiosoma elongatum
Conibiosoma elongatum is a species of darkling beetle (family Tenebrionidae) described by Horn in 1870. The genus Conibiosoma contains few species and is poorly documented in the literature. Records indicate limited observational data, with only seven observations documented on iNaturalist. The species epithet "elongatum" suggests an elongated body form relative to congeners.
Conibius gagates
Conibius gagates is a darkling beetle species in the family Tenebrionidae, described by Horn in 1870. It is native to Mexico and belongs to a genus of small to medium-sized beetles typically associated with arid and semi-arid environments. The specific epithet "gagates" derives from Latin, meaning "jet-black" or referring to lignite coal, suggesting a dark coloration. As with many tenebrionid beetles, it likely occupies ground-dwelling ecological niches in dry habitats.
Hexacylloepus ferrugineus
Rusty Riffle Beetle, rusty elmid
Hexacylloepus ferrugineus, commonly known as the rusty riffle beetle or rusty elmid, is a species of riffle beetle in the family Elmidae. It is found in Central America and North America. The species was first described by Horn in 1870. Riffle beetles in this family are typically associated with aquatic habitats, particularly flowing water environments.
Liodema
Liodema is a genus of darkling beetles (family Tenebrionidae) established by Horn in 1870. The genus is native to the Nearctic and Neotropical regions, with records from Colorado and broader distribution across the Americas. It is a poorly documented genus with very few observations in citizen science databases.
Microcylloepus similis
Microcylloepus similis is a species of riffle beetle (family Elmidae) described by Horn in 1870. It belongs to a group of aquatic beetles commonly known as elmids or riffle beetles, which are characteristic inhabitants of flowing water habitats. The species is part of the genus Microcylloepus, a group of small aquatic beetles within the subfamily Elminae.
Mycotrogus angustus
Mycotrogus angustus is a species of darkling beetle in the family Tenebrionidae, described by Horn in 1870. The genus Mycotrogus belongs to a diverse family of beetles commonly known for their association with arid environments and detritivorous feeding habits. Very little specific information has been published about this particular species.
Pelecyphorus regularis
Pelecyphorus regularis is a species of darkling beetle (family Tenebrionidae) described by Horn in 1870. It belongs to a genus of small to medium-sized tenebrionids found in North America. The species has been recorded from Mexico based on distribution data, though detailed biological information remains limited. As with many tenebrionid beetles, it likely inhabits arid or semi-arid environments, though specific habitat associations have not been documented.
Pentaphyllus californicus
Pentaphyllus californicus is a species of darkling beetle in the family Tenebrionidae, described by Horn in 1870. It belongs to the subfamily Pentaphyllinae, a group characterized by distinctive morphological features. The species is endemic to California, reflecting the biogeographic pattern common to many members of this genus. As with other tenebrionid beetles, it is likely associated with decaying organic matter and forest floor habitats, though specific ecological details remain poorly documented.
Pleuropasta mirabilis
Pleuropasta mirabilis is a blister beetle in the family Meloidae, first described by Horn in 1870. The species belongs to the tribe Eupomphini, a group of meloid beetles characterized by aposematic coloration and chemical defenses. It occurs in both Central America and North America. The genus Pleuropasta contains at least two recognized species, with P. mirabilis being the more widespread and well-collected of the two.
Pseudozonitis longicornis
Pseudozonitis longicornis is a blister beetle in the family Meloidae. It was described by Horn in 1870. The species is known from North America and is part of the genus Pseudozonitis, which contains approximately 12 described species. Like other meloid beetles, it likely possesses chemical defenses derived from cantharidin or related compounds.
Stibia
Stibia is a genus of darkling beetles (family Tenebrionidae) described by Horn in 1870. The genus is native to the Nearctic region and contains relatively few described species. Members of this genus are small to medium-sized beetles associated with arid and semi-arid habitats. The genus is poorly studied, with limited published information on its biology and ecology.