Yunnanilus macrogaster

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Yunnanilus macrogaster
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Nemacheilidae
Genus: Yunnanilus
Species:
Y. macrogaster
Binomial name
Yunnanilus macrogaster

Yunnanilus macrogaster is a hypogean species of stone loach endemic to China. This species is endemic to the endorheic drainage system which feeds the Datangzi Marsh in Luoping County, Yunnan, [3] [1] the marsh has been formed by the outflow of a stream from its underground course. It is a demersal species and the waters where it was found were densely vegetated, [1] it feeds on worms and insects. [2] It is sympatric with Yunnanilus niger and Y, paludosus , [2] forming a small species flock. [4] It lays eggs which it does not guard. [5]

Yunnanilus macrogaster has a moderately elongated and compressed body with a short lateral line which has 6–10 pores and a line of pores on the head. The caudal peduncle is around 1.4 times as long as it is deep and its eyes have a diameter of slightly less than one-fifth of the head length. It grows to a standard length of 63.2 mm. The body is yellowish with an irregular pattern of brown spots on its back and flanks with the dorsal surface of the head being darker and there is a dark patch on the operculum to the rear of the eye. The fins are hyaline and the caudal fin has a vertical black bar at its base but this does not extend to the upper and lower edges of the caudal peduncle. It shows no adaptations to living in caves. [5]

The specific name macrogaster means "large stomach", referring to the swollen bellied appearance of this species. [6]

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Speonectes tiomanensis is a species of stone loach that is endemic to Malaysia and only known from a cave on Tioman Island. This fish reaches a length of 5.8 centimetres (2.3 in) SL. This species is the only known member of its genus, but it was formerly included in Sundoreonectes. It is the only cavefish known from Malaysia.

<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.

Yunnanilus niger is a hypogean species of stone loach endemic to China. This species is endemic to the endorheic drainage system which feeds the Datangzi Marsh in Luoping County, Yunnan,

Oreonectes retrodorsalis is a species of stone loach. This cavefish is found only in Guangxi in China. Some authorities places this species in the genus Yunnanilus rather than Oreonectes. The specific name is a compound of the Latin words retro meaning back or past and dorsalis meaning "the back", referring to the placement of the dorsal fin closer to base of the caudal fin than to the tip of snout.

Yunnanilus analis is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. The type locality is Xingyun Lake in Yunnan, southern China. The specific name analis means "of the anus" and refers to the six branched rays in the anal fin, a unique feature among the species classified under Yunnanilus.

Yunnanilus brevis, common name Inle loach, is a species of ray-finned fish in the genus Yunnanilus, although some authorities place it in the genus Petruichthys. It is only found in Inle Lake and the adjacent He-Ho Plain in the Southern Shan States in Myanmar. It is a demersal fish which occurs in still and slow running waters as well as in a shallow lake, with dense submerged and floating vegetation.

Yunnanilus chui is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. The specific name honours the ichthyologist Chu Xin-Luo. The type locality for this species is Fuxian Lake at Haikou, Hainan in China.

Yunnanilus discoloris is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. It is currently only in a single spring in the drainage basin of Lake Dianchi in Yunnan.

Yunnanilus forkicaudalis is a species of stone loach which is endemic to China. Its type locality is Lunan County, Heilongtan in Yunnan. Some authorities consider Y. forkicaudalis to be a junior synonym of Yunnanilus macrositanus.

Yunnanilus longibulla is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. The type locality for this species is Chenghai Lake in Yunnan. The specific name longibulla means "long bubble" and refers to the elongated shape of the swim bladder compared to closely related species.

Yunnanilus macrolepis is a species of stone loach which is endemic to China. Its type locality is Luoping County in Yunnan. Some authorities consider Y. macrolepis to be a junior synonym of Yunnanilus paludosus.

Yunnanilus nanpanjiangensis is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. It is endemic to China and uts type locality is near Agang Town, Luoping County, Yunnan and the specific name refers to the Nanpanjiang River.

Yunnanilus obtusirostris is a species of ray-finned fish, a stone loach in the genus Yunnanilus. Its type locality is the West Dragon Spring, which flows into Fuxian Lake in Chengjiang County, Yunnan. It mau be a species in the genus Heminoemacheilus rather than Yunnanilus. The specific name is a compound of the Latin rostrum meaning a "beak" and obtusus meaning "blunt", this refers to the species' short snout.

Yunnanilus paludosus is a species of stone loach endemic to China. This species is endemic to the endorheic drainage system which feeds the Datangzi Marsh in Luoping County, Yunnan, The specific name paludosus means "marshy", referring to the habitat of the type locality, Datangzi Marsh.

Yunnanilus pulcherrimus is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. It is found in the Hongshuihe River, part of the Xijiang River basin in China, with the type locality in Du'an County, Guangxi. The specific name pulcherrimus means most beautiful and is a reference to the “unique” banded color pattern ofthin vertical stripes crossing a wide lateral band, when compared to related species.

Yunnanilus sichuanensis is a species of ray-finned fish, a stone loach, in the genus Yunnanilus. It is endemic to Sichuan in China where the type locality is the Shuyalong Jiang River in the drainage of the Anning River in Mianning County.

Yunnanilus tigerivinus is a species of stone loach which is endemic to China. Its type locality is an opening of an underground channel in a suburb of Kunming in Yunnan. Some authorities consider Y. tigerivinus to be a junior synonym of Yunnanilus pleurotaenia .

Yunnanilus ganheensis is a species of freshwater ray-finned fish, a stone loach in the genus Yunnanilus. The type locality is Ganhe in Xundan County in Yunnan and the specific name refers to that location.

Yunnanilus niulanensis is a species of freshwater ray-finned fish, a stone loach from the genus Yunnanilus. Its type locality is the Yanglinhe River in Songming County in Yunnan. The specific name refers to the Niulanjiang River, in the Yangtze basin, of which the Yanglinhe is a tributary.

Yunnanilus yangzonghaiensis is a species of freshwater ray-finned fish, a stone loach, in the genus Yunnanilus. It is endemic to China and its type locality is Yangzong Lake in Yunnan. This species has been placed in the genus Eonemachilus.

References

  1. 1 2 3 Devi, R.; Boguskaya, N. (2009). "Yunnanilus macrogaster". IUCN Red List of Threatened Species . 2009: e.T23176A9425350. doi: 10.2305/IUCN.UK.2009-2.RLTS.T23176A9425350.en . Retrieved 14 November 2021.
  2. 1 2 3 Froese, Rainer; Pauly, Daniel (eds.) (2017). "Yunnanilus macrogaster" in FishBase. October 2017 version.
  3. ↑ Kottelat, M. (2012). "Conspectus_cobitidum.pdf Conspectus cobitidum: an inventory of the loaches of the world (Teleostei: Cypriniformes: Cobitoidei)" (PDF). The Raffles Bulletin of Zoology. Supplement No. 26: 1–199.
  4. ↑ Maurice Kottelat; Chu Xin-Luo (1988). "Revision of Yunnanilus with descriptions of a miniature species flock and six new species from China (Cypriniformes: Homalopteridae)". Environmental Biology of Fishes. 23 (1–2): 65–94. doi:10.1007/BF00000739. Abstract
  5. 1 2 Aldemaro Romero; Yahui Zhao; Xiaoyong Chen (2008). "The Hypogean fishes of China". In Noakes D.L.G.; Romero A.; Zhao Y.; Zhou Y. (eds.). Chinese Fishes. Developments in Environmental Biology of Fishes, vol 28. Springer, Dordrecht. doi:10.1007/s10641-009-9441-3. ISBN   978-90-481-3458-8.
  6. ↑ "Order CYPRINIFORMES: Family NEMACHEILIDAE (Stone Loaches)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. 2017. Retrieved 27 January 2018.


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