Bibarba parvoculus

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Bibarba parvoculus
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cobitidae
Genus: Bibarba
Species:
B. parvoculus
Binomial name
Bibarba parvoculus
Wu, Yang & Xiu, 2015

Bibarba parvoculus is a cave-dwelling species of loach endemic to a karst cave in Guangxi in southern China. [1] [2] Its only known congener (an organism within the same genus) is the surface-dwelling Bibarba bibarba , from which it is believed to have evolutionarily split in the Early Miocene. [3] [4]

Contents

Description

B. parvoculus is a troglobitic species with a depigmented body and reduced eyes. [4] Males display a duplication of the lamina circularis on the second and third pectoral rays. The coracoid, mesocoracoid, and scapula are stouter in males, with the three bones being autogenous (that is, unfused), in contrast to Bibarba bibarba where these bones are fused with the cleithrum. [4] It also differs from B. bibarba, by having a higher number of vertebrae, a broader anterior part of the frontal bone at the orbital region, and decreased sexual dimorphism. [4]

Related Research Articles

<span class="mw-page-title-main">Cyprinidae</span> Family of freshwater fish

Cyprinidae is a family of freshwater fish commonly called the carp or minnow family, including the carps, the true minnows, and their relatives the barbs and barbels, among others. Cyprinidae is the largest and most diverse fish family, and the largest vertebrate animal family overall, with about 3,000 species; only 1,270 of these remain extant, divided into about 370 genera. Cyprinids range from about 12 mm in size to the 3 m (9.8 ft) giant barb. By genus and species count, the family makes up more than two-thirds of the ostariophysian order Cypriniformes. The family name is derived from the Greek word kyprînos.

<span class="mw-page-title-main">Cypriniformes</span> Order of fishes

Cypriniformes is an order of ray-finned fish, including the carps, minnows, loaches, and relatives. Cypriniformes is an Order within the Superorder Ostariophysi consisting of "Carp-like" Ostariophysins. This order contains 11-12 families, although some authorities have designated as many as 23, over 400 genera, and more than 4,250 species, with new species being described every few months or so, and new genera being recognized frequently. They are most diverse in southeastern Asia, and are entirely absent from Australia and South America. At 112 years old, the longest-lived cypriniform fish documented is the bigmouth buffalo.

<span class="mw-page-title-main">Cobitidae</span> Family of fishes

Cobitidae, also known as the True loaches, is a family of Old World freshwater fish. They occur throughout Eurasia and in Morocco, and inhabit riverine ecosystems. Today, most "loaches" are placed in other families. The family includes about 260 described species. New species are being described regularly.

<i>Pangio</i> Genus of fishes

Pangio is a genus of small Asian freshwater fish in the true loach family Cobitidae. In earlier taxonomic schemes it was known as Acanthophthalmus. The "kuhli loach" is well-known in the aquarium trade and commonly identified as P. kuhlii, but most individuals actually appear to be P. semicincta.

Sinocyclocheilus is a genus of freshwater fish in the family Cyprinidae endemic to China, only found in Guangxi, Guizhou and Yunnan. Almost all of its species live in or around caves and most of these have adaptions typical of cavefish such as a lack of scales, lack of pigmentation and reduced eyes. Several species have an unusual hunchbacked appearance and some of the cave-dwellers have a "horn" on the back, the function of which is unclear. In contrast, the Sinocyclocheilus species that live aboveground, as well as a few found underground, show no clear cavefish adaptions. They are relatively small fish reaching up to 23 cm (9.1 in) in length. The individual species have small ranges and populations, leading to the status of most of the evaluated species as threatened. Many species populations in the genus have yet to be evaluated by the IUCN.

<i>Cobitis</i> Genus of fishes

Cobitis is a genus of small freshwater fish in the family Cobitidae from temperate and subtropical Eurasia. It contains the "typical spiny loaches", including the well-known spined loach of Europe. Similar spiny loaches, occurring generally south of the range of Cobitis, are nowadays separated in Sabanejewia.

<i>Garra</i> Genus of fishes

Garra is a genus of fish in the family Cyprinidae. These fish are one example of the "log suckers", sucker-mouthed barbs and other cyprinids commonly kept in aquaria to keep down algae. The doctor fish of Anatolia and the Middle East belongs in this genus. The majority of the more than 140 species of garras are native to Asia, but about one-fifth of the species are from Africa.

<i>Oreonectes</i> Genus of fishes

Oreonectes is a genus of fish in the family Nemacheilidae found in the rivers and caves of Asia. Many of these species are troglobitic.

<i>Schistura</i> Genus of fishes

Schistura is a genus of fish in the stone loach family Nemacheilidae native to the streams and rivers of the southern and eastern Asia. Some of these species are troglobitic.

<i>Triplophysa</i> Genus of fishes

Triplophysa is a genus of fish in the family Nemacheilidae found mainly in and around the Qinghai-Tibet Plateau in China. Currently, the genus is a mixed assemblage of species. Some lineages have been identified and treated as subgenera, but as Wikipedia follows Fishbase for fish species all but Hedinichthys have been treated as subgenera in Wikipedia, although Kottelat in his revision of the loaches did recognise them as valid. FishBase, however, includes these in Triplophysa without specifying subgenera and treats the names given by Kottelat as synonyms.

<i>Yunnanilus</i> Genus of fishes

Yunnanilus is a genus of small stone loaches that are endemic to southeastern China, especially Guangxi and Yunnan. They are found in rivers, streams and lakes; some species are restricted to caves.

<span class="mw-page-title-main">Botiidae</span> Family of fishes

Botiidae is a family of cypriniform ray-finned fishes from South, Southeast, and East Asia. Until recently they were placed in the true loach family Cobitidae, until Maurice Kottelat revised the loaches and re-elevated this taxon to family rank in 2012. The family includes about 56 species.

<i>Balitora</i> Genus of fishes

Balitora is a genus of fish in the family Balitoridae endemic to Asia.

<span class="mw-page-title-main">Loach</span> Superfamily of fishes

Loaches are fish of the superfamily Cobitoidea. They are freshwater, benthic (bottom-dwelling) fish found in rivers and creeks throughout Eurasia and northern Africa. Loaches are among the most diverse groups of fish; the 1249 known species of Cobitoidea comprise about 107 genera divided among 9 families.

Erromyzon is a genus of fish in the family Gastromyzontidae endemic to China and Vietnam.

Bibarba is a genus of loach that is found in the Chengjiang River and Hongshuihe River in China.

Bibarba bibarba is a species of loach that is found in the Chengjiang River of the Long River system in China. It is the only known congener of Bibarba parvoculus, a troglobitic species described in 2015, from which it is believed to have evolutionarily split in the Early Miocene.

Yaoshania pachychilus, the panda loach, is a species of gastromyzontid loach endemic to mountain streams in Jinxiu County, Guangxi in China. This species grows to a length of 5.8 centimetres (2.3 in) SL. This species is monotypic, but it was formerly included in Protomyzon. Juveniles are strikingly coloured in black-and-white, but adults are relatively plain. Y. pachychilus quickly became a popular aquarium fish in the 2010s.

Troglonectes is a genus of troglobitic fish in the family Nemacheilidae, native to caves of Asia. Fishbase and other authorities place these species in the genus Oreonectes.

Yang Jun-Xing is a Chinese herpetologist and ichthyologist with the Kunming Institute of Zoology. As of 2018, Yang authored 9 species of fish and amphibians.

References

  1. Froese, Rainer; Pauly, Daniel (eds.) (2006). "Bibarba parvoculus" in FishBase . April 2006 version.
  2. Wu TJ; Yang J; Xiu LH (2015). "A new species of Bibarba (Teleostei: Cypriniformes: Cobitidae) from Guangxi, China". Zootaxa. 3905 (1): 138–144. doi:10.11646/zootaxa.3905.1.9. PMID   25661027.
  3. Bohlen J; Li F; Šlechtová V. (2020). "Phylogenetic position of the genus Bibarba as revealed from molecular genetic data (Teleostei: Cobitidae)". Ichthyological Exploration of Freshwaters. 29: 297–304.
  4. 1 2 3 4 You He; Yongxia Chen; Jian Yang; Lawrence M Page (2021). "Phylogenetic analysis and osteological comparison of the cave-dwelling spined loach, Bibarba parvoculus (Cypriniformes: Cobitidae), and its surface congener". Zoological Journal of the Linnean Society. 191 (4): 1059–1074. doi:10.1093/zoolinnean/zlaa073.