Cerambycidae Temporal range: | |
---|---|
Batus barbicornis | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Coleoptera |
Infraorder: | Cucujiformia |
Superfamily: | Chrysomeloidea |
Family: | Cerambycidae Latreille, 1802 [1] |
Subfamilies | |
Eight; see text |
The longhorn beetles (Cerambycidae), also known as long-horned or longicorns (whose larvae are often referred to as roundheaded borers), are a large family of beetles, with over 35,000 species described. [2]
Most species are characterized by antennae as long as or longer than the beetle's body. A few species have short antennae (e.g., Neandra brunnea ), making them difficult to distinguish from related families such as Chrysomelidae. "Cerambycidae" comes from a Greek mythological figure: after an argument with nymphs, the shepherd Cerambus is transformed into a large beetle with horns.
Longhorn beetles are found on all continents except Antarctica. [3]
Other than the typical long antennal length, the most consistently distinctive feature of adults of this family is that the antennal sockets are located on low tubercles on the face; other beetles with long antennae lack these tubercles, and cerambycids with short antennae still possess them. They otherwise vary greatly in size, shape, sculpture, and coloration. A number of species mimic ants, bees, and wasps, though a majority of species are cryptically colored. The titan beetle (Titanus giganteus) from northeastern South America is often considered the largest insect (though not the heaviest, and not the longest including legs), with a maximum known body length of just over 16.7 cm (6.6 in). [4]
Larvae are 0.5–22 cm (0.20–8.66 in) long, elongate in shape and lightly sclerotised. The prothorax is often enlarged and the sides of the body have lateral swellings (ampullae). The head is usually retracted into the prothorax and bears well-sclerotised mouthparts. Larval legs range from moderately developed to absent. The spiracles are always annular. [5]
All known longhorn beetle larvae feed on plant tissue such as stems, trunks, or roots of both herbaceous and woody plants, often in injured or weak trees. [6] A few species are serious pests. The larvae, called roundheaded borers, bore into wood, where they can cause extensive damage to either living trees or untreated lumber (or, occasionally, to wood in buildings; the old-house borer, Hylotrupes bajulus, is a particular problem indoors).
Many longhorns locate and recognize potential hosts by detecting chemical attractants, including monoterpenes (compounds released en masse by woody plants when stressed), ethanol (another compound emitted by damaged plant material), and even bark beetle pheromones. Many scolytine weevils share the cerambycid's niche of weakened or recently deceased trees; thus, by locating scolytinids, a suitable host can likely be located as well. The arrival of cerambycid larvae is often detrimental to a population of scolytinids, as the cerambycid larvae will typically either outcompete them with their greater size and mobility, or act as direct predators of them (this latter practice is less common, but has been observed in several species, notably Monochamus carolinensis ). Cerambycids, in turn, have been found to play a role in attracting other wood-borers to a host. [7] Borgemeister, et al. 1998, recorded that cerambycid activity in girdled twigs released volatiles attractive to some bostrichids, especially Prostephanus truncatus . [8] A few cerambycids, such as Arhopalus sp., are adapted to take advantage of trees recently killed or injured by forest fires by detecting and pursuing smoke volatiles.
In addition to feeding on other plant tissue, some species feed on pollen or nectar and may act as pollinators. Assessing the efficacy of beetle pollinators is difficult. Even if pollination of one species by beetles is shown, that same beetle may also act as a flower predator toward other species. In some cases, beetles may act as both pollinators and predators on the same flowers. [9]
Flowers specializing in pollination by beetles typically display a particular set of traits, but pollination by longhorn beetles is not limited to these cantharophilous flowers. A review of angiosperm pollination by beetles shows that Cerambycidae, along with Curculionidae and Scarabaeidae, contains many taxa that are pollinators for not only specialist but also generalist systems. [10]
Beetles in the New Zealand genus Zorion are known to feed on pollen and have a specialized structure similar to that of pollen baskets found in bees. [11] Species in this genus are thought to be important pollinator species for native plants such as harakeke. [12]
Some orchid species have been found to be largely reliant on longhorn beetles for pollination. The species Alosterna tabacicolor was found to be the main pollinator of a rare orchid species ( Dactylorhiza fuchsii ) in Poland. [13] Another rare orchid Disa forficaria, found in the Cape Floristic Region in South Africa, relies on the species Chorothyse hessei for pollination. D. forficaria uses sexual deception targeting male C. hessei, possibly indicating a long history of co-evolution with longhorn beetle pollinators. [14]
The proportion of longhorn beetle species that act as pollinators is unknown. The fact that two species of longhorn species from distinct subfamilies (Lepturinae and Cerambycinae) found on different continents both with significant roles as pollinators could suggest that some capacity for pollination may be common among longhorn beetles.
In North America some native cerambycids are the hosts of Ontsira mellipes (a parasitoid wasp in the family Braconidae). [15] O. mellipes may be useful in controlling a forestry pest in this same family, Anoplophora glabripennis , that is invasive in North America. [15]
As with many large families, different authorities have tended to recognize many different subfamilies, or sometimes split subfamilies off as separate families entirely (e.g., Disteniidae, Oxypeltidae, and Vesperidae); [16] there is thus some instability and controversy regarding the constituency of the Cerambycidae. [17] There are few truly defining features for the group as a whole, at least as adults, as there are occasional species or species groups which may lack any given feature; the family and its closest relatives, therefore, constitute a taxonomically difficult group, and relationships of the various lineages are still poorly understood. [18] The oldest unambiguous fossils of the family are Cretoprionus and Sinopraecipuus from Yixian Formation of Inner Mongolia and Liaoning, China, dating to the Aptian stage of the Early Cretaceous, approximately 122 million years ago. The former genus was assigned to the subfamily Prioninae in its original description, while the latter could not be placed in any extant subfamily. [19] [20] Qitianniu from the mid-Cretaceous Burmese amber of Myanmar, dating to approximately 100 million years ago, also could not be placed in any extant subfamily. [21]
The eight subfamilies are: [22] [23]
Most species (90.5%) are concentrated in the Cerambycinae and Lamiinae subfamilies. [3]
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.
The Asian long-horned beetle, also known as the starry sky, sky beetle, or ALB, is native to the Korean Peninsula, northern and southern China, and disputably in northern Japan. This species has now been accidentally introduced into the eastern United States, where it was first discovered in 1996, as well as Canada, and several countries in Europe, including Austria, France, Germany, Italy and UK.
Anoplophora chinensis, the citrus long-horned beetle, is a long-horned beetle native to Japan, China, Korea, Taiwan and Southeast Asia where it is considered a serious pest. This beetle has invaded several countries in Europe, including Italy, Switzerland, Turkey, France, Germany, and Croatia.
The titan beetle is a Neotropical longhorn beetle, the sole species in the genus Titanus, and one of the largest known beetles, as well as one of the largest known insects, at over 170 mm (6.7 in) in length. Adult titan beetles only live for a few weeks, and protect themselves from predators with their sharp spines and powerful jaws.
The family Oedemeridae is a cosmopolitan group of beetles commonly known as false blister beetles, though some recent authors have coined the name pollen-feeding beetles. There are some 100 genera and 1,500 species in the family, mostly associated with rotting wood as larvae, though adults are quite common on flowers. The family was erected by Pierre André Latreille in 1810.
The Disteniidae are a small family of beetles in the superfamily Chrysomeloidea, traditionally treated as a group within the Cerambycidae.
The Vesperidae are a small family of beetles, normally classified within the family Cerambycidae, of heterogeneous aspect but all characterised by larval stages related to roots of herbaceous plants or trees
Clytus arietis, the wasp beetle, is a wasp-mimicking longhorn beetle species in the genus Clytus.
Lepturinae, the lepturine beetles, is a subfamily of the longhorn beetle family (Cerambycidae), containing about 150 genera worldwide. This lineage is most diverse in the Northern Hemisphere. Until recently the subfamily Necydalinae was included within the lepturines, but this has been recently recognized as a separate subfamily. Nine tribes are usually recognized today, with a tenth, Caraphiini, created in 2016. A few genera are of uncertain placement within the subfamily.
Enoplocerus is a genus of longhorn beetles in the subfamily Prioninae of the family Cerambycidae. It is monotypic, being represented by the single species Enoplocerus armillatus, commonly known as the giant longhorn beetle or imperious sawyer.
Bothriospilini is a tribe of beetles in the subfamily Cerambycinae, containing 11 genera which have a primarily neotropical distribution. The tribe was proposed in 1950 by Brazilian entomologist Frederico Lane as a member of the new subfamily Bothriospilinae, and with Bothriospila assigned as the type genus. The tribe is morphologically close to the tribe Torneutini, with which it has in common the same shape of the last abdominal segment, which is wide and largely braided in the female, as well as the anterior thigh cavities that are open from behind and the laterally open medial cavity.
Dorcasina matthewsii is a species of flower longhorn in the beetle family Cerambycidae. It is found in North America and was described by John Lawrence LeConte in 1869.
Tetropium fuscum, the brown spruce longhorn beetle, is a species of beetle in the family Cerambycidae. It was described by Johan Christian Fabricius in 1787. Tetropium fuscum is native to Europe and Northern Asia, and has been introduced to Nova Scotia, Canada. Brown spruce longhorn is a pest of spruce trees.
Anoplophora is a genus of beetles in the longhorn beetle family (Cerambycidae). They are native to Asia. Most are large and colorful and thus are depicted in artwork and sought after by beetle collectors. The genus also includes several notorious pest insects.
Neoclytus caprea is a species of beetle in the family Cerambycidae. It was described by Say in 1824. It feeds on sapwood of ash, sometimes oak, and hickory. It often emerges indoors from firewood; logs may become infested within 20 days of felling during summer. The banded ash borer experiences sexual dimorphism, as the female of the species is considerable larger in size than the male and has yellow and black elytra coloring rather than white and black of the male of the species. They produce one generation a year.
Phoracantha semipunctata, the Australian Eucalyptus longhorn, is a species of beetle in the family Cerambycidae. Native to Australia, it has now spread to many parts of the world, including practically all countries where tree species of Eucalyptus have been introduced. It has been classified as an invasive pest species of Eucalyptus outside Australia.
Blosyropus spinosus, also known as the spiny longhorn or spiny silver-pine borer, is a rare species of longhorn beetle endemic to New Zealand. It has no specific Māori name, but the term for large longhorns of this type are howaka and kapapa.
Oemona hirta, the lemon tree borer, also known as the whistling beetle or the singing beetle, is a longhorn beetle endemic to New Zealand. Its larvae are generalist feeders, boring into the wood of a wide variety of trees, native and introduced. When citrus orchards were first established in New Zealand, this beetle started inflicting serious damage, and so gained the name "lemon tree borer". Four species within the genus Oemona have been identified, suggesting that more species could be found. When disturbed by predators or humans, the adult beetle stridulates creating a "rasp" or "squeak" sound by rubbing its thorax and head together against an area of thin ridges. Māori would eat a liquid called "pia manuka", which was produced by manuka trees when its wood was damaged by the larvae. When Captain Cook first arrived in NZ, his naturalists, Banks and Solander, collected a lemon tree borer in their first collection between 1769 and 1771. This oldest collected specimen can be found in the British Museum. A few years after the first collection, the species would be first described by the Danish naturalist Fabricius in 1775.
Zorion guttigerum, commonly known as the Flower long-horn beetle, is an endemic species of beetle in New Zealand. It is found on the flowers of many plant species and feeds on nectar and pollen.
Cyrtophorus verrucosus, commonly known as the ant-like longhorn beetle or ant-mimic longhorn beetle, is a species of beetle in the family Cerambycidae. It is native to North America, more specifically southern Canada and the eastern United States.