Rasbora

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Rasbora
Red tailed harlequin (rasbora borapetensis)

Red tailed harlequin ( rasbora borapetensis )

Systematics
without rank: Otophysa
Order : Carp-like (Cypriniformes)
Subordination : Carp fish-like (Cyprinoidei)
Family : Bärblings (Danionidae)
Subfamily : Rasborinae
Genre : Rasbora
Scientific name
Rasbora
Bleeker , 1859

Rasbora is a genus of the Bärblings (Rasborinae). The freshwater fish live in South and Southeast Asia.

Rasbora was described in 1859 by the Dutch doctor and naturalist Pieter Bleeker . Generic type is the first in Leuciscus Asked Rasbora cephalotaenia (Bleeker, 1852).

distribution

The distribution area of ​​the genus Rasbora extends from eastern Pakistan to Sumatra , Borneo , Java , Bali , Lombok and Sumbawa , in the north to the southern Philippine islands of Palawan , Busuanga , Culion and southwestern Mindanao . On the Indian subcontinent they occur from the southern foothills of the Himalayas to Sri Lanka , in southern China in Yunnan , Guangdong , Guangxi and Hong Kong .

The focus of biodiversity is the triangle formed by the Malay Peninsula , Sumatra and Borneo. Scientists suspect that the origin of the genus can be found here and that the repeated transgressions and the rise of sea ​​levels during the last ice ages had a significant influence on speciation.

Eleven species that do not form a monophylum live in the greater India area, which is geographically cut off from Southeast Asia by the mountains in Burma ( Gaoligong Shan , Tenasserim Mountains ).

features

Rasbora species are slender, three to eight centimeters long fish. The mouth is terminal or slightly above, the lower jaw often protrudes a little. They don't have barbels . The lateral line organ begins at the upper edge of the gill cover, then runs downwards in an arch and also remains on the tail stalk, as with all danios, below the middle of the body. The scales are relatively large. Your anal fin always has only five, split fin rays , the dorsal fin begins opposite or just behind the pelvic fins . Most Rasbora species are quite plain in color, many have a longitudinal stripe on the sides, a few are reddish or have reddish markings. The latter are popular aquarium fish.

Rasbora species are not schooling fish as such, but live in social groups that live in the middle and upper areas of their home waters. A male and a female each separate briefly for reproduction.

species

Today over 80 species belong to the genus Rasbora .

Rasbora argyrotaenia species group

Rasbora argyrotaenia

Rasbora daniconius species group

Rasbora danicornius

Rasbora einthovenii species group

Rasbora einthovenii

Rasbora semilineata species group

Rasbora sumatrana species group

Rasbora trilineata

Rasbora trifasciata species group

not classified

Rasbora vulcanus

Some species that used to belong to Rasbora were placed in the newly established genera Boraras , Brevibora , Kottelatia , Rasboroides , Rasbosoma , Trigonopoma and Trigonostigma .

literature

Web links

Commons : Rasbora  - collection of images, videos and audio files

Individual evidence

  1. ↑ Bleeker, P. (1859): Negende bijdrage tot de kennis of the vischfauna van Banka . Natuurkundig Tijdschrift voor Nederlandsch Indië v. 18: 359-378
  2. ↑ Bleeker, P. (1852): Bijdrage tot de kennis der ichthyologische fauna van Blitong (Billiton), with Beschrijving van eenige nieuwe soorten van zoetwatervisschen . Natuurkundig Tijdschrift voor Nederlandsch Indië v. 3: 87-100
  3. ↑ a b c d e f g h Liao, TY, SO Kullander & F. Fang (2009): Phylogenetic analysis of the genus Rasbora (Teleostei: Cyprinidae). - Zoologica Scripta doi : 10.1111 / j.1463-6409.2009.00409.x
  4. ↑ Rasbora on Fishbase.org (English)
  5. ↑ Hiranya Sudasinghe, Rohan Pethiyagoda, Ranasinghe Hettiarachchige, Tharindu Ranasinghe, Rajeev Raghavan, Neelesh Dahanukar and Madhava Meegaskumbura. 2020. A Molecular Phylogeny of the Freshwater ‐ fish Genus Rasbora (Teleostei: Cyprinidae) in Sri Lanka reveals A Remarkable Diversification — And A Cryptic Species. Journal of Zoological Systematics and Evolutionary Research. DOI: 10.1111 / jzs.12395
  6. ↑ a b Anjana Silva, Kalana Maduwage & Rohan Pethiyagoda: A review of the genus Rasbora in Sri Lanka, with description of two new species (Teleostei: Cyprinidae). Ichthyol. Explor. Freshwaters, Vol. 21, No. 1, pp. 27-50, 25 figs., 6 tabs., March 2010 © 2010 by Verlag Dr. Friedrich Pfeil, Munich, Germany - ISSN  0936-9902
  7. ↑ Tan Heok Hui: Rasbora patrickyapi, a new species of cyprinid fish from Central Kalimantan, Borneo. The Raffles Bulletin of Zoology v. 57 (no. 2): 505-509 PDF
  8. ↑ Britz, R. & Tan, HH (2018): Rasbora simonbirchi , a new species of cyprinid fish from Central Kalimantan, Borneo. Ichthyological Exploration of Freshwaters, May 16, 2018.
  9. ↑ Lumbantobing, DN (2014): Four new species of Rasbora of the Sumatrana group (Teleostei: Cyprinidae) from northern Sumatra, Indonesia. Zootaxa , 3764 (1): 1-25. doi: 10.11646 / zootaxa.3764.1.1
  10. ↑ Wilkinson, CL & Tan, HH (2018): Fishes of the Brantian drainage, Sabah, Malaysia, with description of a new Rasbora species (Teleostei: Cyprinidae) . Raffles Bulletin of Zoology: 66: 595-609.
  11. ^ A b c d Daniel N. Lumbantobing: Four New Species of the Rasbora trifasciata-Group (Teleostei: Cyprinidae) from Northwestern Sumatra, Indonesia. Copeia 2010 (4): 644-670. 2010. doi : 10.1643 / CI-09-155