East-asia
Guides
Acruliopsis
Acruliopsis is a genus of rove beetles in the family Staphylinidae, subfamily Omaliinae. The genus contains approximately five described species distributed across East Asia and western North America. Species have been recorded from Japan, the Russian Far East, Korea, and the Pacific Northwest of North America. The genus was established by Zerche in 2003.
Amiota
Amiota is a genus of small flies in the family Drosophilidae, established by Loew in 1862. The genus contains over 100 described species with a cosmopolitan distribution, though it exhibits particularly high diversity in East Asia. Southwestern China has been hypothesized as a possible center of origin and diversification. Some species serve as intermediate hosts and vectors for parasites, including Amiota okadai which transmits the zoonotic nematode Thelazia callipaeda.
Arcuphantes
Arcuphantes is a genus of dwarf spiders (Linyphiidae: Micronetinae) comprising 57 species distributed across Asia and North America. The genus was established by Chamberlin and Ivie in 1943, with A. fragilis designated as the type species. Species diversity is concentrated in Japan and Korea, with additional representatives in China, Mongolia, and North America. The genus is characterized by distinctive genital morphology, particularly elaborate epigynal scapes and male palpal structures.
Atypus karschi
Karsch's Purseweb Spider
Atypus karschi is a mygalomorph spider native to East Asia (Korea, China, Taiwan, Japan) that has been introduced and established in southeastern Pennsylvania, USA. It constructs distinctive camouflaged tubular purse-webs attached to trees, shrubs, or walls, with a portion buried underground. The species was previously misidentified in North America as A. snetsingeri, but genetic analysis confirmed conspecificity with Asian populations. It is the first documented case of an introduced purse-web spider.
Byrsopages
Byrsopages is a genus of weevils in the family Curculionidae, subfamily Entiminae, and the sole member of the tribe Byrsopagini. The genus was established by Carl Johan Schönherr in 1842. It is distributed across parts of East Asia, with records from China, Japan, and Mongolia. The genus contains relatively few species and is poorly represented in biological collections.
Chinattus
Chinattus is a genus of jumping spiders (Salticidae) established by Logunov in 1999, with Heliophanus undulatus as the type species. The genus name combines 'China' with the common salticid suffix '-attus'. It comprises approximately 20 recognized species distributed across the south-eastern Palaearctic and adjacent Oriental Regions, with a strong concentration in China and nearby countries. One species, C. parvulus, represents a notable disjunct occurrence in North America.
Hakka himeshimensis
Hakka himeshimensis is a small jumping spider (Salticidae) native to East Asia and introduced to the eastern United States, likely via maritime shipping. It is the sole species in the monotypic genus Hakka. Both sexes measure approximately 7 mm in body length with uniformly dark brown coloration. The species shows a strong preference for rocky coastal habitats.
Hannabura
Hannabura is a genus of aphids in the family Aphididae, tribe Calaphidini, established by Matsumura in 1917. The genus is placed within the subfamily Calaphidinae, a group of aphids often associated with woody host plants. As with many aphid genera, species-level taxonomy and biology of Hannabura remain incompletely documented in accessible literature.
Heteroplectron
Heteroplectron is a genus of caddisflies in the family Calamoceratidae, established by McLachlan in 1871. The genus contains at least three described species: Heteroplectron americanum (eastern North America), Heteroplectron californicum (western North America), and Heteroplectron yamaguchii (East Asia). As members of the Calamoceratidae, species in this genus construct distinctive larval cases.
Homidia
springtails
Homidia is a genus of springtails (Collembola: Entomobryidae) comprising 84 described species worldwide, with 71% of species (60) recorded from China. The genus is distinguished by specific morphological features including inner spines at the base of the dens, a bidentate mucro with a much larger subapical tooth, eyebrow-like macrochaetae formations on the anterior part of the fourth abdominal segment, and absence of scales. Colour pattern and chaetotaxy serve as important diagnostic characters for species identification.
Homidia sauteri
Homidia sauteri is a species of slender springtail in the family Entomobryidae. It is native to East Asia and has been introduced to other regions including Hawaii. The species possesses a characteristic dorsal chaetotaxy pattern that has been formally described from Japanese specimens. Two subspecies are recognized: the nominate H. s. sauteri and H. s. formosana from Taiwan.
Limonia duplicata
Limonia duplicata is a species of limoniid crane fly originally described by Doane in 1900. The species is currently treated as a synonym of Rhipidia maculata. It has been recorded across a broad geographic range spanning the Nearctic, West Palearctic, and East Palearctic regions, including North America from Alaska to California and Tennessee, much of Europe, and eastward through Russia, Central Asia, East Asia, and China.
Liogma
Liogma is a genus of crane flies in the family Cylindrotomidae, established by Osten Sacken in 1869. The genus contains seven recognized species distributed across the Holarctic and East Asia. Larvae are specialized feeders on mosses, while adults inhabit damp wooded environments.
Maladera japonica
Birodo Beetle
Maladera japonica is a scarab beetle in the family Scarabaeidae, commonly known as the Birodo Beetle. It is native to East Asia, with documented populations in Japan, China (Shanxi), and Korea. The species belongs to a genus that includes several agricultural pests, though specific information about this species' ecology is limited.
Mesosini
Mesosini is a tribe of longhorn beetles (Cerambycidae) within the subfamily Lamiinae. The tribe contains approximately 60 described genera distributed primarily across East Asia, Southeast Asia, and parts of the Oriental region. Members are characterized by morphological traits typical of Lamiinae, with some genera exhibiting distinctive features such as elytral tubercles or modified antennae. The tribe includes economically significant species associated with hardwood trees.
Neuroctenus
flat bugs
Neuroctenus is a genus of flat bugs in the family Aradidae, subfamily Mezirinae, containing approximately 7 described species. Species in this genus are characterized by their strongly flattened bodies adapted for living under bark and in decaying wood. They are mycophagous, feeding on fungal mycelium, and have been documented in East and Southeast Asia including Taiwan, Hainan, Yunnan, Guizhou, and Tibet. Several species have been studied through mitochondrial genome sequencing, revealing close phylogenetic relationships within the genus and placement of Neuroctenus as sister to Mezira within Mezirinae.
Octonoba sinensis
Octonoba sinensis is a cribellate orb-weaving spider in the family Uloboridae. Native to East Asia, it has been introduced to the United States. As a member of Uloboridae, it lacks venom glands and instead uses a cribellum—a specialized silk-producing organ—to create sticky capture threads.
Pachygrontha
Pachygrontha is a genus of true bugs (Hemiptera: Heteroptera) in the family Pachygronthidae, comprising more than 30 described species. The genus is classified within the superfamily Lygaeoidea and is characterized as seed bugs and allies. One well-studied species, Pachygrontha antennata, has been documented as a generalist inhabitant of urban, forested, and agricultural environments across East Asia.
Parapediasia
Parapediasia is a genus of crambid moths established by Bleszynski in 1963. The genus comprises approximately twelve described species distributed primarily in the Americas. At least one species, Parapediasia teterrella, has been documented as invasive in East Asia. Adult emergence patterns have been studied in P. teterrella, showing seasonal progression in timing and consistent sex ratios.
Patchiella
Patchiella is a genus of aphids in the subfamily Pemphiginae, established by Tullgren in 1925. The genus is distinguished by its obligate association with Tilia species, where colonies form distinctive "leaf nests" by folding and binding leaves together. Members exhibit host alternation, migrating between Tilia (primary host) and Araceae (secondary host) seasonally. The genus includes P. kolokasia, recently documented from South Korea, expanding its known range from China and Japan.
Patchiella kolokasia
Patchiella kolokasia is a gall-forming aphid in the subfamily Pemphiginae. It forms distinctive leaf nests on Tilia species and exhibits host alternation, with Araceae serving as secondary hosts. The species was described from China in 1999 and has since been recorded from Japan and, more recently, South Korea. This represents the first documentation of the genus Patchiella on the Korean Peninsula.
Platnickina mneon
A comb-footed spider in the family Theridiidae, originally described from a female specimen collected in Saga Prefecture, Kyushu, Japan in 1906. The species was recently reinstated as valid based on distinct body coloration, markings, genital morphology, and molecular data (partial mitochondrial COI gene), having been previously synonymized with Yunohamella lyrica. Molecular analysis revealed that females previously identified as Platnickina mneon are conspecific with males associated with Yunohamella varietas, leading to the latter's synonymization. The species is currently classified under the genus Platnickina, though it was transferred to Yunohamella in the revision that reestablished its validity.
Pseudotephritis
Pseudotephritis is a genus of picture-winged flies in the family Ulidiidae, containing five described species distributed across North America, Europe, and East Asia. Species in this genus are saproxylic, with larvae developing in weakened and dying deciduous trees. Adults are typically collected in forest canopies and are attracted to fermenting baits. The genus was established by Johnson in 1902.
Pugettia
kelp crabs
Pugettia is a genus of marine kelp crabs in the family Epialtidae, distributed across the North Pacific from North America to East Asia. Species inhabit shallow subtidal zones, primarily associated with macroalgal habitats including kelp beds, Sargassum stands, and red algal turfs. Many species exhibit ontogenetic habitat shifts, with juveniles and smaller individuals occupying deeper algal turfs while larger adults migrate to shallower macroalgal beds. The genus includes approximately 25 extant species plus one fossil species, with several species serving as important subjects for studies of crab growth, reproduction, and habitat ecology.
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issikii
Scythropiodes issikii is a small moth species first described by Ryoichi Takahashi in 1930. Originally placed in Depressariidae, it is now classified in Peleopodidae within the subfamily Oditinae. The species is known from East Asia, with records from Japan, Korea, China, and Russia. It is one of the more frequently observed Scythropiodes species, with over 1,700 documented observations.
Statilia maculata
Asian jumping mantis, 小蟷螂, ko-kamakiri, 좀사마귀, joem-sa-ma-gui
Statilia maculata is a medium-sized praying mantis native to East Asia, commonly known as the Asian jumping mantis. Adults range from 40–50 mm (males) to 45–58 mm (females). The species inhabits low-lying vegetation including weeds and shrubs, distinguishing it from canopy-dwelling relatives. First described by Carl Peter Thunberg in 1784 from specimens thought to be from eastern India, it is now recognized across a broad Asian range. The species exhibits notable sexual dimorphism in cercal structure, with females possessing more articles and longer cerci than males.
Stenhomalus taiwanus
Stenhomalus taiwanus is a species of longhorn beetle in the family Cerambycidae, described by Matsushita in 1933. The species is native to East Asia and has been recorded from Taiwan, Japan, South Korea, and mainland China. It belongs to the tribe Stenhomalini, a group of small to medium-sized cerambycine beetles. The specific epithet refers to Taiwan, where the species was first described.
Trichonephila clavata
Jorō spider, Joro Spider, Parachute spider
Trichonephila clavata, commonly known as the Jorō spider, is a large orb-weaving spider native to East Asia that has become established as an invasive species in the southeastern United States since approximately 2010. First confirmed in Georgia in 2014, it has expanded rapidly across multiple states through a combination of ballooning dispersal and human-mediated transport. The species is notable for its substantial size, striking coloration, and extensive golden webs, but poses minimal risk to humans due to small fangs and docile behavior. Its physiological adaptations—including higher metabolic rate, faster heart rate, and greater cold tolerance than its congener Trichonephila clavipes—suggest potential for continued northward range expansion.
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Ulomorpha is a genus of crane flies in the family Limoniidae, first described by Osten Sacken in 1869. The genus contains ten described species distributed across North America and East Asia. Members are characterized by distinctive wing venation and body setation patterns typical of the subfamily Limnophilinae.