Fossil-genus
Guides
Charhyphus
Charhyphus is a genus of rove beetles in the family Staphylinidae, established by Sharp in 1887. The genus contains five described species, all restricted to North America. Species range from the southwestern United States (Arizona) to broader distributions across the continent. The genus is part of the megadiverse rove beetle family, though specific ecological and behavioral traits remain poorly documented.
Cimbex
Elm sawflies, Birch sawflies, Almond leaf wasps
Cimbex is a genus of large, robust sawflies in the family Cimbicidae, distributed across North America, Europe, and Asia. Adults are among the largest sawflies, with body lengths reaching 20-25 mm, and are frequently mistaken for bees or wasps due to their plump appearance and yellow-and-black coloration. The genus includes notable species such as C. americanus (elm sawfly), C. femoratus (birch sawfly), and C. quadrimaculatus (almond leaf wasp), some of which are significant defoliators of trees. Larvae are caterpillar-like, with seven pairs of prolegs distinguishing them from lepidopteran caterpillars, and possess chemical defense glands. The genus has a fossil record extending from the Eocene to the Miocene.
Leptoconops
black gnat, no-see-um
Leptoconops is a genus of biting midges (family Ceratopogonidae) commonly known as black gnats or no-see-ums. The genus has a relictual distribution with predominantly tropical and subtropical range, though some species extend to temperate regions including Russia and Canada. Adults are small blood-feeding insects; females are diurnal feeders on vertebrate blood. The genus represents one of the earliest existing lineages of biting midges, with fossil records dating to Cretaceous amber.
Ophryastini
Ophryastini is a tribe of broad-nosed weevils (subfamily Entiminae) comprising approximately 90 species across 4 extant genera and one extinct genus. The tribe was established by Lacordaire in 1863 and has a disjunct distribution spanning North America, Asia, and Europe. Members of this tribe are characterized by their broad snouts and root-feeding habits typical of Entiminae.
Xyela
pine catkin sawflies, pine shoot gall sawflies
Xyela is a genus of primitive sawflies in the family Xyelidae, established in 1819. The genus has cosmopolitan distribution with approximately 50 described species, including both extant and fossil taxa. Most species are associated with Pinus (pine) as larval hosts, developing inside staminate cones; one species, X. gallicaulis, forms shoot galls instead. Adults are early spring fliers often found on Salix or Alnus catkins near host pines.