Ctenists

Article

December 7, 2021

Ctenistes are a genus of small, reddish or brownish beetles that have been placed in the family of short-winged beetles.

Appearance

Small, reddish or yellowish beetles, the hind body is much wider than the front body. The head is about as long as wide, often with striking pits or outgrowths. The facet eyes are usually small and somewhat protruding, in some species they are completely missing. The antennae are long and powerful, slightly club-shaped. The palps (mouthfeel) are comb-shaped. The breast shield (pronotum) is about as long as wide, usually widest in front of the center, often with conspicuous pits or furrows. The coverts are round in outline, much wider than the breast shield. They are smooth and shiny, with one or more deep longitudinal grooves. The two or three rear hind body joints protrude behind the cover wings. The legs are often relatively long and strong, often with thickened thighs.

Levevis

The adult beetles are often found in rotting plant material, such as compost, leaf litter, under bark or the like. Most people probably feed on mites and other small arthropods. The species Bryaxis puncticollis is very common in deciduous trees in Norwegian forests. A good number of species are associated with ants, so-called ant mecophiles. The most famous of these is the blind club beetle, Claviger testaceus, which lives in the colonies of the yellow earth ant, Lasius flavus. These small, yellowish beetles, which lack eyes, are completely dependent on ants. On the hind body, the beetle has some tufts of hair that secrete a substance that the ants are very fond of - it hardly has any nutritional value, but may act as an intoxicant. The ants lick the substance from the tufts of hair. Should the ant colony be disturbed, for example if you lift up the stone they live under, the ant workers carry the beetles safely with the colony's larvae and pupae.

Systematic division

Order Biller, Coleoptera The suborder Polyphaga Superfamily Carnivores and predators, Staphylinoidea The family Short-winged (Staphylinidae) Subfamily Club beetles, Pselaphinae Overstammmen Pselaphitae Ctenistini Blanchard tribe, 1845 The genus Ctenistes Reichenbach, 1816 - 35 species, widespread Ctenistes adelaidae Blackburn, 1889 - now most often attributed to the genus Ctenisophus Aubé aequinoctialis Ctenistes, 1838 Ctenistes alternans - now most often attributed to the genus Enoptostomus Ctenistes andalusicus Saulcy, 1870 Ctenistes andersoni Ctenistes angusticollis Motschulsky, 1851 Ctenistes arabicus Besuchet & Cuccodoro, 2011 - now most often attributed to the genus Enoptostomus Ctenistes armatus Sharp, 1874 - now most often attributed to the genus Poroderus Ctenistes aubei Rosenhauer, 1856- now most often led to the genus Enoptostomus Ctenistes australis Raffray, 1887 Ctenistes braunsi Raffray, 1898 Cteniste's breviceps Sharp, 1883 - now most often attributed to the genus Sognorus Ctenistes calcaratus Baudi di Selve, 1870 - now most often attributed to the genus Sognorus Ctenistes carvalhoi Jeannel, 1957 Ctenistes ceylanicus Jeannel, 1961 - now most often attributed to the genus Poroderus Ctenistes consobrinus Ctenistes costulatus Ctenistes crassicornis Raffray, 1904 Ctenistes crassirostris Ctenistes curvidens Raffray, 1882 Ctenistes deserticola Raffray, 1882 Ctenistes discedens Sharp, 1883 - now most often attributed to the genus Ctenisodes Ctenistes ghilianii Aubé, 1838 Ctenistes gibbiventris Ctenistes globulicornis Motschulsky, 1851 - now most often attributed to the genus Enoptostomus Ctenistes globulipalpus Schmidt-Göbel, 1838 Ctenistes gracilicornis Jeannel, 1955 Ctenistes gracilis Jeannel, 1960 Ctenistes guianensis Schaufuss, 1888 Ctenistes heterocerus Reitter, 1900 - now most often attributed to the genus Ctenisomorphus Ctenistes hindustanus Motschulsky, 1851 Ctenistes imitator Ctenistes integricollis Ctenistes katanganus Jeannel, 1957 Ctenistes kiesenwetteri Saulcy, 1874 Ctenistes leleupi Jeannel, 1950 Ctenistes lepineyi Peyerimhoff, 1943 Ctenistes longicornis Motschulsky, 1851 Ctenistes machadoi Jeannel, 1957 Ctenistes maindroni Ctenistes major Raffray, 1877 - now most often attributed to the genus Ctenisomorphus Ctenistes marthae Cteniste

INSERT INTO `wiki_article`(`id`, `article_id`, `title`, `article`, `img_url`) VALUES ('NULL()','Ctenistes','Ctenists','Cteniste','https://upload.wikimedia.org/wikipedia/commons/3/3a/Ctenistes_palpalis_Jacobson.png')