Rarely-collected
Guides
Pseudoplatylabus townesi
Pseudoplatylabus townesi is a species of ichneumon wasp described by Heinrich in 1962. It belongs to the large family Ichneumonidae, a group of parasitoid wasps. The species is extremely poorly known, with only two documented observations on iNaturalist and minimal published biological information. Like other members of its genus, it is presumed to be a parasitoid of other insects, though specific host records are unavailable.
Pseudothenicus
Pseudothenicus is a small genus of plant bugs in the family Miridae, subfamily Bryocorinae. Members of this genus are poorly documented in the scientific literature, with only a handful of observations recorded. They belong to a group of mirids associated with mosses and other bryophytes.
Rhopalosoma
cricket parasitoid wasps
Rhopalosoma is a genus of aculeate wasps in the family Rhopalosomatidae, comprising 18 described species distributed primarily in the Neotropics and southern Nearctic. Larvae develop as ectoparasitoids of crickets (Orthoptera: Gryllidae, Trigonidiidae), attaching externally to host nymphs or adults. Adults are rarely encountered in the field and are among the least known of all parasitoid wasps. Genetic studies indicate the presence of cryptic species diversity, with at least two genetically distinct lineages present in America north of Mexico.
Rhyncolus knowltoni
Rhyncolus knowltoni is a species of weevil in the family Curculionidae, described by Thatcher in 1940. The genus Rhyncolus belongs to the true weevils, a large and diverse group of beetles characterized by their elongated snouts. This species is known from limited collection records across the Canadian Prairie Provinces.
Rustleria
Rustleria is a monotypic genus of beetles in the family Teredidae, established by Stephan in 1989. The genus contains a single described species, R. obscura. Teredidae, formerly treated as a subfamily of Tenebrionidae, comprises small to medium-sized beetles often associated with dead wood and fungal habitats.
Sanctanus fusconotatus
Sanctanus fusconotatus is a species of leafhopper in the family Cicadellidae, subfamily Deltocephalinae. It was described by Osborn in 1922. The species belongs to the genus Sanctanus, a group of small, active insects commonly associated with grasses and herbaceous vegetation. Very little specific information is documented about the biology or ecology of this particular species.
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productus
Scaphoideus productus is a leafhopper species in the family Cicadellidae, first described by Osborn in 1900. It belongs to the subfamily Deltocephalinae and tribe Scaphoideini. The species has been documented from several U.S. states in the Midwest and Northeast, with iNaturalist records indicating relatively few observations (17). As a member of the genus Scaphoideus, it shares taxonomic affinities with the well-studied American grapevine leafhopper (S. titanus), though specific biological details for S. productus remain poorly documented in the scientific literature.
Scaphomorphus calandroides
Scaphomorphus calandroides is a weevil species in the family Curculionidae, subfamily Lixinae. The species was originally described as Lixus calandroides by Randall in 1838 and later transferred to the genus Scaphomorphus. It is a North American species with limited documented occurrence records. As a member of the Lixinae, it belongs to a group of weevils commonly known as 'lixine weevils,' which are typically associated with herbaceous plants. The genus Scaphomorphus contains species with somewhat cylindrical body forms and elongated rostra.
Scaphomorphus erysimi
Scaphomorphus erysimi is a species of weevil in the family Curculionidae, subfamily Lixinae. The species was originally described by Fall in 1901 under the genus Cleonus and later transferred to Scaphomorphus. It is currently recognized as a synonym of Cleonus erysimi in some taxonomic databases, though iNaturalist maintains it under Scaphomorphus. Very little is known about this species' biology or distribution beyond basic taxonomic records.
Schizophilus
Schizophilus is a genus of false click beetles (family Eucnemidae) established by Bonvouloir in 1871. It is the type genus of the subfamily Schizophilinae, a small group within the Elateroidea superfamily. The genus contains relatively few described species and remains poorly known in terms of biology and ecology. Specimens are rarely collected, contributing to limited understanding of their natural history.
Schwarzella
Schwarzella is a genus of chalcid wasps in the family Chalcididae, described by Ashmead in 1904. The genus belongs to the tribe Hybothoracini within the subfamily Haltichellinae. Chalcidid wasps in this group are generally small parasitoids, though specific biological details for Schwarzella remain poorly documented. The genus is rarely encountered in field observations, with limited published natural history information.
Scleropogon huachucanus
Scleropogon huachucanus is a species of robber fly (family Asilidae) described by Hardy in 1942. The specific epithet references the Huachuca Mountains of Arizona, suggesting a southwestern U.S. distribution. Like other Asilidae, this species is presumed to be a predatory fly, though specific behavioral and ecological details remain poorly documented. The genus Scleropogon is characterized by distinctive morphological features including a bearded face and elongated body form.
Selvadius nunenmacheri
Selvadius nunenmacheri is a minute lady beetle species in the family Coccinellidae. Adults measure 1.55–2.35 mm in length. The species has been documented from Colorado in western North America. It belongs to a small genus of rarely encountered coccinellids.
Slaterobius chisos
Slaterobius chisos is a species of seed bug in the family Rhyparochromidae, described by Slater & Sweet in 1993. It is known from the Chisos Mountains region of western Texas, a rugged desert mountain range within Big Bend National Park. The species belongs to a genus of ground-dwelling seed bugs associated with arid and semi-arid habitats. Like other members of Rhyparochromidae, it is presumed to feed on seeds, though specific ecological details remain poorly documented. The species is rarely collected and appears to have a restricted geographic range.
Smicrips
palmetto beetles
Smicrips is a genus of small beetles in the family Smicripidae, commonly known as palmetto beetles. The genus contains at least two described species: Smicrips palmicola and Smicrips texana. Members of this genus are associated with palm vegetation, as indicated by the species epithet 'palmicola' and their common name.
Statira pulchella
Statira pulchella is a species of darkling beetle in the family Tenebrionidae, subfamily Lagriinae. It belongs to the long-jointed beetle group, which represents an aberrant lineage within Tenebrionidae that does not conform to the typical darkling beetle morphology. The genus Statira is characterized by elongated body proportions and distinctive antennal structure. This species is rarely encountered in collections, with limited observational records available.
Stenotothorax parapyriformis
Stenotothorax parapyriformis is a species of dung beetle in the family Scarabaeidae, subfamily Aphodiinae. It was described from specimens collected in the western United States. The species name refers to its pear-like (pyriform) body shape, similar to but distinct from related species. It belongs to a genus of small aphodiine dung beetles.
Stenotothorax sparsus
Stenotothorax sparsus is a small scarab beetle in the subfamily Aphodiinae, first described by LeConte in 1878. The species is documented from limited localities in western North America, including California, Oregon, and Chihuahua, Mexico. Records remain sparse, with only seven observations documented on iNaturalist. As a member of the Aphodiinae, it likely occupies dung-associated habitats, though specific ecological details remain poorly documented.
Striatovertex
Striatovertex is a genus of parasitoid wasps in the family Figitidae, described in 2011. It belongs to the diverse group of cynipoid wasps, many of which are parasitoids of other insects. The genus is known from very few records and remains poorly studied.
Sylvanelater furtivus
Sylvanelater furtivus is a click beetle species in the family Elateridae, described by LeConte in 1853. The species is known from a limited number of observations, with records primarily from British Columbia, Canada. As a member of the genus Sylvanelater, it belongs to a group of elaterid beetles associated with forested habitats.
Symphylus caribbeanus
Symphylus caribbeanus is a seldom-collected shield-backed bug (family Scutelleridae) described by Kirkaldy in 1909. It belongs to a family characterized by an enlarged scutellum that covers most or all of the abdomen and wings. The species has been documented in the Caribbean and North America, though detailed biological information remains limited due to its rarity in collections.
Synetocephalus diegensis
A small leaf beetle in the family Chrysomelidae, described from California. The species epithet refers to San Diego, indicating its type locality. Very few observations exist in biodiversity databases, suggesting it is either rare, undercollected, or restricted to specific habitats. It belongs to a genus of flea beetles characterized by enlarged hind femora adapted for jumping.
Telphusa melanoleuca
Telphusa melanoleuca is a small gelechiid moth described by Walsingham in 1911. It is known only from Guerrero, Mexico. The species is characterized by striking wing patterning with contrasting dark and white markings.
Terapus
Terapus is a genus of clown beetles in the family Histeridae, established by Marseul in 1863. It belongs to the subfamily Haeteriinae, a group characterized by associations with ants and termites. The genus is poorly known, with very few observations and limited published information on its biology. Members of Haeteriinae are generally myrmecophilous or termitophilous, living as inquilines in ant or termite colonies.
Tesuquea hawleyana
Tesuquea hawleyana is a small moth in the family Carposinidae, first described by Klots in 1936. It is one of only two known species in the genus Tesuquea, both endemic to the southwestern United States. The species is poorly known, with limited collection records and minimal published biological information.
Tohlezkus
Tohlezkus is a genus of plate-thigh beetles in the family Eucinetidae. The genus contains three described species: T. ponticus, T. orientalis, and T. inexpectus. Members of this genus are rarely collected, with limited documentation of their biology and ecology. T. inexpectus has been recorded in West Virginia, USA, representing a new state record for this species.
Trichophyinae
Trichophyinae is a monotypic subfamily of rove beetles (Staphylinidae) containing only the genus Trichophya. Established by Thomson in 1858, this subfamily represents one of the most species-poor lineages within the hyperdiverse rove beetle family. The genus Trichophya contains multiple described species, though the exact number remains uncertain due to taxonomic revisions. These beetles are rarely encountered and poorly represented in collections.
Trigonodemus
Trigonodemus is a genus of rove beetles (Staphylinidae) in the subfamily Omaliinae, tribe Anthophagini. It was established by John Lawrence LeConte in 1863. The genus is rarely encountered, with minimal published documentation and few observational records.
Trimioplectus
ant-loving beetles
Trimioplectus is a genus of minute ant-loving beetles in the rove beetle family Staphylinidae, specifically within the subfamily Pselaphinae. The genus was established by Brendel in 1890 and contains at least three described species distributed across North America and Australia. These beetles are myrmecophilous, meaning they live in association with ants. Members of this genus are rarely collected and poorly known biologically.
Tripudia paraplesia
Tripudia paraplesia is a noctuid moth described from a small number of specimens. The species was formally named by Michael G. Pogue in 2009 during a revision of the Tripudia quadrifera species complex. Known records are limited to north-eastern Mexico and a single 1994 collection from Louisiana, USA. The species remains poorly documented in life history and ecology.
Tydessa
Tydessa is a genus of beetles in the family Pyrochroidae (fire-colored beetles), established by Peacock in 1982. It is the sole genus in the subfamily Tydessinae. The genus is extremely poorly known, with minimal published biological or ecological information available.
Tymnes oregonensis
Oregon Leaf Beetle
Tymnes oregonensis is a species of leaf beetle in the family Chrysomelidae, tribe Alticini. It is native to western North America. The species was originally described by Crotch in 1873 and has been historically treated under the genus Phyllotreta as a synonym. Available records indicate presence in the Canadian provinces of Alberta and Manitoba, with broader distribution across North America. Like other members of the Alticini, it possesses enlarged hind femora adapted for jumping.
Veraphis
Veraphis is a genus of minute rove beetles in the subfamily Scydmaeninae, family Staphylinidae. The genus is rarely collected and was historically considered to have its greatest diversity in Northern Europe, but recent taxonomic work has revealed Japan to be the center of diversity with at least fourteen species. Additional species occur in China, Korea, and other parts of the East Palaearctic region. The grammatical gender of Veraphis is feminine.
Zoraptera
angel insects, ground lice
Zoraptera is a small insect order containing approximately 30–51 extant species across two families (Zorotypidae and Spiralizoridae). These tiny insects exhibit remarkable wing dimorphism: most individuals are wingless, pale, and eyeless, while a minority develop as dark, winged alates with compound eyes and ocelli that can shed their wings at a basal fracture line. They inhabit tropical and subtropical forests worldwide, living cryptically under bark, in rotting wood, or in leaf litter. Their phylogenetic position remains debated, with morphological evidence linking them to Embioptera and molecular data suggesting affinity with Dictyoptera or Dermaptera.
Zygobaris
flower weevils
Zygobaris is a genus of flower weevils in the beetle family Curculionidae, established by John Lawrence LeConte in 1876. The genus contains eight described species, all native to North America. These weevils are associated with flowering plants, though specific ecological details remain poorly documented. The genus is rarely encountered in collections and has received limited study beyond taxonomic description.