Sometimes the elytra are relatively broader posteriorly in the female e.g. The occurrence of some species depends upon soil type and climatic conditions. Three species occur in the U.K. Adult elaterids should be searched for among foliage and on the flowers of trees, shrubs and herbaceous plants, by sweeping all kinds of grassland, under bark or among accumulated wood debris in tree hollows. They are typical elaterids, resembling Athous etc. The hind wings are usually well-developed and most species are strong fliers. in Anostirus. L. corpulentus Candéze, 1889, the one-eyed Madagascan click beetle or L. goudti (Laporte de Castelnau, 1836). Must see. The large and mostly Holarctic genus Agriotes Eschscholtz, 1829 includes more than 150 species of which 30 occur in Europe and 6 extend to the U.K. The head is retracted into the thorax, usually to about the posterior margin of the eyes, and prognathous or, rarely, hypognathous, and convex, as in Agriotes Eschscholtz, 1829 or flat, as in Athous Eschscholtz, 1829. One group deserves attention; the genus Alaus Eschscholtz, 1829 includes more than 20 species of large elaterids, 25-45mm long, distributed throughout the New World and Australasia and known as Eyed click beetles or Eyespot beetles. The pronotum is wrinkled along the base, the prosternal process short, truncate anteriorly and raised above the coxae. The biology of the group is typical of the family with many saproxylic and subterranean developing species. This is a small group of three genera of Asian and Oriental beetles. The Prosternal suture is closed anteriorly and margined by a narrow line. The group is dominated by the cosmopolitan genus Agrypnus Eschscholtz, 1829 with about 500 species, more than 60 of which are Palaearctic but only 2 occur in Europe, the northern Mediterranean A. crenicollis (Ménétriés, 1832) and A. murinus (Linnaeus, 1758) which is widespread including the U.K. Their ranges may overlap at the boundaries, but it is unlikely to see species completely cross over and populate the others' regions. Subprotelaterinae Fleutiaux, 1920 or Thylacosterninae Fleutiaux, 1920 are defined, and the modern definition includes some groups formerly regarded as distinct families e.g. It is found at just three sites in the UK. The Palaearctic and Oriental Procraerus Reitter, 1905 includes 15 species, 2 of which occur in Europe and one, P. tibialis (Boisduval & Lacordaire, 1835) is a rare saproxylic species of southern England. Click beetles are attracted to moist areas and at night are attracted to light. Beetles Beetles represent the largest insect group with around 4,000 species in Britain and 300,000 worldwide. The margins of the longitudinal mesosternal groove, which may be only poorly developed, are either level with the cuticle or raised above it. The anterior margin of the frons is entire and the mouthparts are steeply declined forward, the antennae are serrate from the fourth segment. Many temperate species are diurnal but there are some common and widespread species that will only be found nocturnally e.g. This is a large group of about 400 species included in 10 genera occurring throughout the world with the exception of the Neotropical region, the greatest diversity is in the Oriental region and only two genera occur in the Palaearctic of which only Melanotus Eschscholtz, 1829 occurs in central and northern Europe. Interstices vary from flat to very convex, in temperate species they are at most only weakly convex, they sometimes have keels and are variously microsculptured; transversely rugose, reticulate, tuberculate and usually very finely punctured. On hot nights they may enter houses, but are not pests there. It is listed as Endangered on the global IUCN Red List of Threatened Species and is a Priority Species under the UK Post-2010 Biodiversity Framework. Phyllophoridae The legs are 5-segmented including a claw-like pretarsus. In arboriculture the larvae of Ectinus aterrimus (Linnaeus, 1761) develop in beech seeds and acorns in central Europe and outbreaks of adults are controlled with pheromone traps. in many Agriotes, the head and pronotum may be more transverse e.g. The eyes are generally large and protruding with small facets. Larvae of the predominant pest species develop underground and are known as wire-worms, they include species of Athous, Agriotes, Melanotus and Adrastus, and they may take from 3 to 5 years, depending upon conditions, before they are fully grown. All species are tropical; Cussolenis Fleutiaux, 1920 species are Asian and Australasian, Lumumbaia Muona & Vahlera, 2009 are African and Pterotarsus Guérin-Meneville, 1831, Thylacosternus Bonvouloir, 1875 and Balgus Fleutiaux, 1920 are Neotropical. Larder Beetle. It contains four Nearctic and more than 30 Palaearctic species. Parablacinae Adults inhabit a wide range of biotopes; the majority of temperate species are occur in woodland or wooded environments although many also occur in open situations; grassland, steppes and agricultural situations etc., some are associated with wetland habitats e.g. Adults are characterized by the longitudinally convex head with steeply declined mouthparts and the convex frons which has the anterior margin entire. Oestodinae This page was last edited on 16 December 2020, at 21:35. Some species have dark, round marks on their backs to mimic the eyes of larger animals. The majority of species develop over two years and in general they are considered beneficial as many feed on plant pests e.g. and also, to a lesser extent, other insects and they are diurnal as well as nocturnal. The widest diversity is in the Asian and Oriental regions. The greatest diversity is in the Oriental region. Many superficially resemble Melandryids or Tenebrionids. The procoxal cavities are separate and the coxae do not project below the prosternum. Provisional atlas of the click beetles (Coleoptera: Elateroidea) of Britain and Ireland. Several species of Cebrio occur in Southern Europe and all seem to be localized e.g. Among the European fauna only Synaptus and Adrastus have pectinate claws. ... European (non-UK) African. Methods for pest control include crop rotation and clearing the land of insects before sowing. Click beetle, (family Elateridae), also called skipjack, snapping beetle, or spring beetle, any of approximately 7,000 species of beetles (insect order Coleoptera) named for the clicking noise made when seized by a predator. For information on image rights, click HERE. Mesepimeron and mesepisternum separated from the mesocoxae by the meso- and metasternum. Some species are long-lived and overwinter under bark etc. Brachygonus du Bysson, 1912 includes 5 Palaearctic species of which one, B. ruficeps (Mulsant & Guillebeau, 1855) has been recorded from a single Berkshire locality. Hemiopinae especially when these are exposed after strong winds, leaf litter and tussocks may be very productive in the winter as may be flood refuse, or under logs and stones or among gravel. carry and spread bacterial and viral diseases between plants. Many develop in wetland situations and some occur at high latitudes and altitudes. They are very typical ‘click beetles’ with a long and relatively straight or only weakly curved outline and convex or only weakly flattened dorsal and ventral surfaces. Beyond this generalization most groups must be considered separately as there is much overlap with other groups, especially the Elaterinae. Athous Eschscholtz, 1829 is a very large Holarctic, Oriental and Neotropical genus with about 300 species in 10 subgenera; 5 species of 3 subgenera occur in the U.K. Diacanthous Reitter, 1905 is Holarctic with 7 species. The U.K. fauna is relatively small with 7 species included in 4 genera. Other names include elaters, snapping beetles, spring beetles or skipjacks. They occur among vegetation in the spring and have root-feeding larvae. Some species e.g. Of the more than 70 species of click beetle in Britain about half have larvae that are predatory and feed in dead wood, the rest develop in soil. Their ecology is very diverse with many root-feeders and pest species, saproxylics as well as species with more specific requirements such as wetlands or woodlands. … This video is of a Click Beetle doing his thing. The exterior is hard and their legs are short and stout. Click Beetles are nocturnal, so a few seen during the daytime could signal a greater infestation. Variegated Carpet Larva. in sandy situations. The head is prognathous with the labrum fused to the anterior edge of the frontoclypeal plate so forming a median and variously toothed projection. Subprotelaterinae Most species develop slowly over several years and pupate in the ground. All are quite distinctive due to the well-developed maxillary and labial palps; in some cases these are very elongate and thickened, see e.g. Agriotes Eschscholtz, 1829, and impressive species e.g. In the UK DEFRA (2010) have recorded click beetle populations as high as 2.5 x 10 6 per hectare, and 3.8 x 10 6 per hectare on permanent pasture. The dorsal surface is generally smooth or only moderately granulate or tuberculate and lacks any major structural modification. Semiotinus Pjatakowa, 1941 includes 17 species, 15 of which have been transferred from the previous genus, which are separated by the straight pronotal margin. They grow up to 35mm in length and are a golden brown colour. A further 2 species are included in our checklist but are either of very doubtful occurrence or are long extinct: C. gramineus (Scopoli, 1763) was listed by Stephens in 1830 with a few scattered records from England, and C. ruficollis (Linnaeus, 1758) was listed by Stephens in 1830 as occurring in London and Norfolk. Other striking species may be found among the Hemirhipini Candéze, 1857, a group including 21 genera and more than 450 species. About 330 species of 20 genera and 4 tribes occur in the Nearctic region and of the 8 tribes and 60 Palaearctic genera 7 tribes and 22 genera are European; the U.K. fauna comprises 11 genera and about 30 species in 5 tribes and includes some of our most common e.g.
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