The insects of the beetle family Chrysomelidae are commonly known as leaf beetles, and include over 37,000 species in more than 2,500 genera, making up one of the largest and most commonly encountered of all beetle families. Numerous subfamilies are recognized, but the precise taxonomy and systematics are likely to change with ongoing research.
Dynastinae or rhinoceros beetles are a subfamily of the scarab beetle family (Scarabaeidae). Other common names – some for particular groups of rhinoceros beetles – include Hercules beetles, unicorn beetles or horn beetles. Over 1500 species and 225 genera of rhinoceros beetles are known.
Cryptophagidae is a family of beetles with representatives found in all biogeographic realms. Members of this family are commonly called silken fungus beetles and both adults and larvae appear to feed exclusively on fungi although in a wide variety of habitats and situations, such as rotting wood and shed animal fur and feathers. These beetles vary from about 1 to 11 millimeters long, and usually have an oval body shape with a slight "waist".
Hippodamia is a genus of ladybirds in the family Coccinellidae. It includes the most common native North American "ladybug", H. convergens, which can form overwintering aggregations numbering in the millions. Another notable member is Hippodamia variegata, which occurs widely over both the North and South Hemispheres.
The blister beetle genus Meloe is a large, widespread group commonly referred to as oil beetles. They are known as "oil beetles" because they release oily droplets of hemolymph from their joints when disturbed; this contains cantharidin, a poisonous chemical causing blistering of the skin and painful swelling. Members of this genus are typically flightless, without functional wings, and shortened elytra.
Agabus is a large genus of predatory aquatic beetles in the family Dytiscidae, proposed in 1817 by William Elford Leach and named after Agabus, an early follower of Christianity. The adult beetles are moderate-sized, 5 to 14 mm long. The genus is primarily Holarctic in distribution, with only a few species known from the Afrotropical and Neotropical realms. Three species of Agabus, namely A. clypealis, A. discicollis and A. hozgargantae are endangered according to the IUCN Red List. The division into subgenera is not widely accepted. However, a number of species groups are recognized after the works of David J. Larson and Anders N. Nilsson. The genus is probably polyphyletic or paraphyletic. In a recent study of mitochondrial DNA, Agabus was found paraphyletic with respect to several of the species groups of Platambus, a closely related genus in the tribe Agabini. Lately the taxonomy of the genus has been revised, and some groups of species were transferred from Agabussensu stricto to other genera in the tribe Agabini.
Silvanidae, "silvan flat bark beetles", is a family of beetles in the superfamily Cucujoidea, consisting of 68 described genera and about 500 described species. The family is represented on all continents except Antarctica, and is most diverse at both the generic and species levels in the Old World tropics.
Dicerca is a genus of beetles in the family Buprestidae. It contains the following species:
Platyninae is a subfamily of ground beetles. Occasionally it was treated as a tribe Platynini of subfamily Harpalinae, particularly when this was circumscribed loosely.
Tachyta is a genus of ground beetles in the family Carabidae. There are at least 30 described species in Tachyta.
Labidomera is a genus of leaf beetles.
Trichiotinus is a genus of fruit and flower chafers in the family Scarabaeidae. There are about 8 described species in Trichiotinus, all native to the New World.
Platynini is a tribe of ground beetles in the family Carabidae. There are at least 260 described species in Platynini.
Plateumaris is a genus of aquatic leaf beetles in the family Chrysomelidae. There are about 17 described species in Plateumaris.
Pytho is a genus of dead log beetles in the family Pythidae. There are about nine described species in Pytho.
Dichelonyx is a genus of May beetles and junebugs in the family Scarabaeidae. There are at least 30 described species in Dichelonyx.
Sericoda quadripunctata is a species of ground beetle in the family Carabidae. It is found in Europe and Northern Asia and North America.
Tenebroides is a genus of bark-gnawing beetles in the family Trogossitidae. There are at least 20 described species in Tenebroides.
Trirhabda is a genus of skeletonizing leaf beetles in the family Chrysomelidae. There are more than 30 described species in Trirhabda. They are found in North America and Mexico.
Thanatophilus is a genus of carrion beetles in the family Silphidae. There are about 12 described species in Thanatophilus.
