Amphizoa is a genus of aquatic beetles in the suborder Adephaga, placed in its own monogeneric family, Amphizoidae. There are five known species of Amphizoa, three in western North America and two in eastern palearctic. They are sometimes referred to by the common name troutstream beetles.
Ulmus szechuanicaFang, known as the Szechuan (Sichuan), or red-fruited, elm, is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu.
Ulmus gausseniiW. C. Cheng, the Anhui, or hairy, elm, is a medium size deciduous tree whose natural range is restricted to the valleys of the Langya limestone mountains of Chu Xian in Anhui Province, eastern China. The tree was most commonly found on the flood plains, indicating a tolerance of periodic inundation. However, U. gaussenii is now possibly the rarest and most endangered elm species, with only approximately 30 trees known to survive in the wild in 2009.
Hydraenidae is a family of very small aquatic beetles, sometimes called "minute moss beetles", with a worldwide distribution. These beetles are generally 1–3 mm in length with clubbed antennae. They do not swim well and are generally found crawling in marginal vegetation. Most are phytophagous but a few saprophagous and predatory species are known.
The American Elm cultivar Ulmus americana 'St. Croix' is a recent (2008) selection cloned from a large tree growing at Afton, Minnesota, which has displayed a high resistance to Dutch elm disease (DED). A U S patent, PP 20097, was granted in 2009.
Hygrobia is a genus of aquatic beetles native to Europe, North Africa, China and Australia. It is the only genus in the family Hygrobiidae, also known as the Paelobiidae. These are known commonly as squeak beetles or screech-beetles.
Copelatus sociennus is a species of diving beetle. It is part of the subfamily Copelatinae in the family Dytiscidae. It was described by J. Balfour-Browne in 1952. The species can be found on Coloane and in Seac Pai Van. It feeds on Nelumbo nucifera.
Ancyronyx, commonly known as spider water beetles or spider riffle beetles, is a genus of aquatic riffle beetles from North America, South Asia, China, and Southeast Asia. They are small beetles with extremely long legs ending in strong claws. Both the adults and the larvae are found underwater in the shallow riffles of streams and rivers, clinging to rocks or submerged wood. They feed on algae and decaying wood tissue. The genus contains twenty-one species, eleven of which are endemic to the Philippines.
Amphizoa sinica is a species of beetle in the Amphizoidae family. The length of its body is between 11 and 13.5 millimeters. Its metasternal process is depressed, with the lateral margin raised. It lives in the northeastern province of Jilin in China and in North Korea.
Amphizoa lecontei is a species of aquatic beetle. Adults have a body length of between 11.5 and 16 millimeters. Its elytron has a distinct carina on fifth interval. The species is found in western North America, especially in the Rocky Mountains. Its common name is "Trout-stream beetle". Its synonym is Amphizoa carinata.
Amphizoa insolens is a species of aquatic beetles. It is found in North America from Alaska to southern California.
Aquatica hydrophila is a species of firefly found in Taiwan. Described in 2003, it was formerly placed in the genus Luciola. The larvae are aquatic and live in ditches and small streams.
Ochthebius puncticollis is a species of minute moss beetle in the family Hydraenidae. It is found in Central America and North America.
Ochthebius is a genus of minute moss beetles in the family Hydraenidae. There are at least 460 described species in Ochthebius.
Ochthebius lineatus is a species of minute moss beetle in the family Hydraenidae. It is found in Central America, North America, and South America.
Ochthebius marinus, the marine moss beetle, is a species of minute moss beetle in the family Hydraenidae. It is found in Europe and Northern Asia, North America, and Southern Asia.
Epimetopidae is a family of semi-aquatic beetles found on the edges of streams and shallow freshwater ponds. These beetles are shorter than half a centimeter long and have a pronotum with a central projection forming a shelf above the head. On the underside of the abdomen only four sternites are visible. There are less than a hundred species in three genera, Epimetopus which is restricted to the New World, mostly Neotropical, Eupotemus with two Afrotropical species and Eumetopus with some Oriental species. Females carry their eggcases on the underside of the abdomen.
Aspidytidae is a family of aquatic beetles of the suborder Adephaga, described in 2002 from specimens in South Africa and China. There are only two known species in the family and these were originally described in the genus Aspidytes, but later the new genus Sinaspidytes was erected for the species found in China. The family can also be referred to by its trivial name cliff water beetles.
Hydrovatus rufoniger, is a species of predaceous diving beetle found in India, Bangladesh, Myanmar, Sri Lanka, China, Sumatra, Malaysia, Singapore, Thailand, Vietnam and Australian region.
Hydrovatus lyratus, is a species of predaceous diving beetle widespread in South Asia, South East Asia and Australian region.
