#Prehistoric rhinoceros beetle series

A 2015 study provided four independent estimates of the total number of beetle species, giving a mean estimate of some 1.5 million with a 'surprisingly narrow range' spanning all four estimates from a minimum of 0.9 to a maximum of 2.1 million beetle species. Distribution and diversity īeetles are by far the largest order of insects: the roughly 400,000 species make up about 40% of all insect species so far described, and about 25% of all animal species. Another Old English name for beetle is ċeafor, chafer, used in names such as cockchafer, from the Proto-Germanic * kebrô ('beetle' compare German Käfer, Dutch kever, Afrikaans kewer). The English name beetle comes from the Old English word bitela, little biter, related to bītan (to bite), leading to Middle English betylle. The name of the taxonomic order, Coleoptera, comes from the Greek koleopteros (κολεόπτερος), given to the group by Aristotle for their elytra, hardened shield-like forewings, from koleos, sheath, and pteron, wing. Most beetles, however, do not cause economic damage and many, such as the lady beetles and dung beetles are beneficial by helping to control insect pests.Įtymology Coleoptera at the Staatliches Museum für Naturkunde Karlsruhe, Germany

Serious pests include the boll weevil of cotton, the Colorado potato beetle, the coconut hispine beetle, and the mountain pine beetle. However, the major impact of beetles on human life is as agricultural, forestry, and horticultural pests. Over 300 species are used as food, mostly as larvae species widely consumed include mealworms and rhinoceros beetle larvae. Many beetle groups are brightly and attractively colored making them objects of collection and decorative displays. Many beetles, including those that live in sandy places, have effective camouflage.īeetles are prominent in human culture, from the sacred scarabs of ancient Egypt to beetlewing art and use as pets or fighting insects for entertainment and gambling. Many beetles are aposematic, with bright colors and patterns warning of their toxicity, while others are harmless Batesian mimics of such insects. Some, such as stag beetles, have a marked sexual dimorphism, the males possessing enormously enlarged mandibles which they use to fight other males.

#Prehistoric rhinoceros beetle series

Beetles are endopterygotes, which means that they undergo complete metamorphosis, with a series of conspicuous and relatively abrupt changes in body structure between hatching and becoming adult after a relatively immobile pupal stage.

The general anatomy of a beetle is quite uniform and typical of insects, although there are several examples of novelty, such as adaptations in water beetles which trap air bubbles under the elytra for use while diving.

Some species are serious agricultural pests, such as the Colorado potato beetle, while others such as Coccinellidae (ladybirds or ladybugs) eat aphids, scale insects, thrips, and other plant-sucking insects that damage crops.īeetles typically have a particularly hard exoskeleton including the elytra, though some such as the rove beetles have very short elytra while blister beetles have softer elytra. Found in almost every habitat except the sea and the polar regions, they interact with their ecosystems in several ways: beetles often feed on plants and fungi, break down animal and plant debris, and eat other invertebrates. The Coleoptera, with about 400,000 described species, is the largest of all orders, constituting almost 40% of described insects and 25% of all known animal species new species are discovered frequently, with estimates suggesting that there are between 0.9 and 2.1 million total species. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. Clockwise from top left: female golden stag beetle ( Lamprima aurata), rhinoceros beetle ( Megasoma sp.), long nose weevil ( Rhinotia hemistictus), cowboy beetle ( Chondropyga dorsalis), and a species of Amblytelusīeetles are insects that form the order Coleoptera ( / k oʊ l iː ˈ ɒ p t ər ə/), in the superorder Endopterygota.