Acanthacorydalis fruhstorferi | |
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Female | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Megaloptera |
Family: | Corydalidae |
Genus: | Acanthacorydalis |
Species: | A. fruhstorferi |
Binomial name | |
Acanthacorydalis fruhstorferi van der Weele, 1907 | |
Acanthacorydalis fruhstorferi is a species of dobsonfly native to Vietnam and China. It holds the title of largest aquatic insect by wingspan according to the Guinness Book of World Records at 21.6 cm. [1] [2] The title formerly belonged to the Brazilian damselfly Microstigma rotundatum .
Acanthacorydalis fruhstorferi was first described by Herman Willem van der Weele in 1907 from a specimen from "Than-Moi" (probably in Lạng Sơn Province [3] ), Vietnam. It is found throughout Southern China (Fujian, Guangxi, Guangdong, Guizhou, Jiangxi, Yunnan, and Zhejiang) and Northern Vietnam. [4]
Liu and associates proposed in 2005 that the species is most closely related to Acanthacorydalis sinensis citing morphological similarities relative to similar Chinese genera of Acanthacorydalis . Specifically the wing and body colouration, yet differed by A.sinensis's lack of sagittal dorsal division. [4]
Eggs are deposited between stones near flowing water.
Larvae inhabit streams or rivers with low contamination. Larvae are sensitive to pH changes, with instances of A. fruhstorferi populations being reduced due to developments in urbanized locations such as Panzhihua, Sichuan. Typical of other dobsonflies, A. fruhstorferi larvae prey on aquatic insects, juvenile amphibians and small fish.
Adults display strong phototaxis and are often seen near waterside lamps. Adult A. fruhstorferi are not predatory, and instead feed on tree sap. [5]
A. fruhstorferi individuals display sexual dimorphism. With both body and weapon size being different between sexes. Head size is not different between individuals of differing sexes, and nuptial gifts are smaller relative to other dobsonflies. [6]
The genus name Acanthacorydalis is a combination of the Greek Ἀκάνθα ( acantha , thorny) with κορυδαλλις (corydalus, pertaining to κορυς, the crest of a helmet). In this specific instance, κορυδαλλις alludes to the genus Corydalus found in North America, for whom it shares the same family with.
The specific epithet fruhstorferi pertains to 19th century entomologist Hans Fruhstorfer.
Cryptomeria is a monotypic genus of conifer in the cypress family Cupressaceae. It includes only one species, Cryptomeria japonica. It used to be considered by some to be endemic to Japan, where it is known as Sugi. The tree is called Japanese cedar or Japanese redwood in English. It has been extensively introduced and cultivated for wood production on the Azores.
The insect order Neuroptera, or net-winged insects, includes the lacewings, mantidflies, antlions, and their relatives. The order consists of some 6,000 species. Neuroptera is grouped together with the Megaloptera and Raphidioptera (snakeflies) in the unranked taxon Neuropterida.
Ophiocordyceps sinensis, known colloquially as caterpillar fungus, is an entomopathogenic fungus in the family Ophiocordycipitaceae. It is mainly found in the meadows above 3,500 metres (11,500 ft) on the Tibetan Plateau in Tibet and the Himalayan regions of Bhutan, India, and Nepal. It parasitizes larvae of ghost moths and produces a fruiting body which is valued in traditional Chinese medicine as an aphrodisiac. Caterpillar fungus contains the compound cordycepin, an adenosine derivative. However, the fruiting bodies harvested in nature usually contain high amounts of arsenic and other heavy metals, so they are potentially toxic and sales have been strictly regulated by China's State Administration for Market Regulation since 2016.
The Adephaga are a suborder of beetles, and with more than 40,000 recorded species in 10 families, the second-largest of the four beetle suborders. Members of this suborder are collectively known as adephagans. The largest family is Carabidae which comprises most of the suborder with over 40,000 species. Adephaga also includes a variety of aquatic beetles, such as predaceous diving beetles and whirligig beetles.
The Chinese mitten crab, also known as the Shanghai hairy crab, is a medium-sized burrowing crab that is named for its furry claws, which resemble mittens. It is native to rivers, estuaries and other coastal habitats of East Asia from Korea in the north to Fujian, China in the south. It has also been introduced to Europe and North America, where it is considered an invasive species. The species features on the list of invasive alien species of Union concern. This means that the import of the species and trade in the species is forbidden in the whole of the European Union.
Megaloptera is an order of insects. It contains the alderflies, dobsonflies and fishflies, and there are about 300 known species.
Dobsonflies are a subfamily of insects, Corydalinae, part of the Megalopteran family Corydalidae. The larvae are aquatic, living in streams, and the adults are often found along streams as well. The nine genera of dobsonflies are distributed in the Americas, Asia, and South Africa.
The eastern dobsonfly, Corydalus cornutus, is a large insect in the Corydalidae family. It is found in eastern North America in regions with fast-flowing streams where its aquatic larvae develop. These are known as hellgrammites and are among the top invertebrate predators in the streams in which they live. They are used by anglers as bait.
The Chinese sturgeon is a critically endangered member of the family Acipenseridae in the order Acipenseriformes. Historically, this anadromous fish was found in China, Japan, and the Korean Peninsula, but it has been extirpated from most regions due to habitat loss and overfishing.
Fishflies are members of the subfamily Chauliodinae, belonging to the megalopteran family Corydalidae. They are most easily distinguished from their closest relatives, dobsonflies, by the jaws (mandibles) and antennae. In contrast to the large jaws of dobsonflies, fishfly mandibles are not particularly noticeable or distinctive, and the males have feathery antennae similar to many large moths. Chauliodes pectinicornis, the "summer fishfly", is a well-known species in North America.
The family Corydalidae contains the megalopterous insects known as dobsonflies and fishflies. Making up about three dozen genera, they occur primarily throughout North America, both temperate and tropical, South America, Australia, New Zealand, Africa and Asia.
The Neuropterida are a clade, sometimes placed at superorder level, of holometabolous insects with over 5,700 described species, containing the orders Neuroptera, Megaloptera, and Raphidioptera (snakeflies).
Sialis lutaria, common name alderfly, is a species of alderfly belonging to the order Megaloptera family Sialidae.
Alderflies are megalopteran insects of the family Sialidae. They are closely related to the dobsonflies and fishflies as well as to the prehistoric Euchauliodidae. All living alderflies – about 66 species all together – are part of the subfamily Sialinae, which contains nine extant genera.
Phryganistria is a genus of stick insects belonging to the subfamily Clitumninae, native to northeastern South Asia, northern Mainland Southeast Asia, and southern China. The species in this genus are fairly large to very large stick insects.
Leptobotia elongata, the imperial flower loach, elongate loach or royal clown loach, is a species of botiid fish found in flowing water in the upper and middle Yangtze basin in China. It is the largest species in the family, reaching up to 50 cm (1.6 ft) in length and 3 kg (6.6 lb) in weight. Formerly common, the numbers of this vulnerable species have declined because of overfishing, dams, habitat loss and pollution. The species is bred in captivity and a stocking project has been in place since 2010. It is sometimes kept in aquariums, but require a very large tank.
Protohermes is a genus of dobsonflies in the family Corydalidae. Protohermes is the most speciose and widely distributed genus within Megaloptera, but up to 85% of species are restricted to small endemic areas in Asia. This endemism may be a result of an association with high elevation and high slope streams in Northern Vietnam and China.
Parachauliodes is a genus of fishfly in the family Corydalidae. They are present throughout Eastern Asia, likely originating on the Korean peninsula before dispersing to the Japanese archipelago 15 mya.
Neurhermes is a genus of dobsonflies in the family Corydalidae.
The IMWC also has the world's largest aquatic insect, a dobsonfly (Acanthacorydalis fruhstorferi) with a wingspan of 21.6 cm.