Barbed pipe mouths
| Barbed pipe mouths | ||||||||||||
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Indostomus paradoxus |
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| Scientific name of the family | ||||||||||||
| Indostomidae | ||||||||||||
| Prashad & Mukerji , 1929 | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Indostomus | ||||||||||||
| Prashad & Mukerji, 1929 |
Indostomus is a genus of very small freshwater fish native to mainland Southeast Asia. The first member of the family, Indostomus paradoxus , was discovered in Lake Indawgyi in Burma in the 1920s. Because the fish was morphologically unique, the new Indostomidae family was created for it. It is three to four inches long.
Two more species were discovered in the 1990s. The only 2.5 centimeters long Indostomus crocodilus comes from the province of Narathiwat in southern Thailand . Indostomus spinosus was found in the Mekong and in nearby swamps. It becomes three centimeters long.
features
Indostomus species have a slender body armored with bone scales. The upper jaw cannot be extended. The soft-rayed dorsal fin is preceded by five short, isolated hard rays that are not connected to the fin membrane. The dorsal and anal fins face each other symmetrically in the middle of the body. Indostomus are Physoclists , so they have a closed swim bladder . Ribs are missing. The number of vertebrae is usually 21 and that of the Branchiostegal rays 5.
- Fin formula : dorsal V / 6, anal 6, pectoral 23, ventral 4
species
So far, three types have been described:
Systematics
After the discovery, the family was assigned to the order of sticklebacks (Gasterosteiformes) because of the external similarity . However, a comparison of the DNA shows that they are relatively close relatives of the gill slit eels (Synbranchidae). In a revision of the bony fish system from 2013, Betancur-R. and colleagues, therefore, the Indostomidae into the order of the gill-slit-eel-like (Synbranchiformes), which also has its main distribution center in Southeast Asia.
literature
- Joseph S. Nelson : Fishes of the World. 4th edition. John Wiley & Sons, Hoboken NJ et al. 2006, ISBN 0-471-25031-7 .
- Baini Prashad & Dev Dev Mukerji, 1929. The fish of the Indawgyi Lake and the streams of the Myitkyina District (Upper Burma). Records of the Indian Museum (Calcutta) v. 31 (pt 3), page 219 and 220.
Individual evidence
- ↑ Blaise Li, Agnès Dettaï, Corinne Cruaud, Arnaud Couloux, Martine Desoutter-Meniger, Guillaume Lecointre: RNF213, a new nuclear marker for acanthomorph phylogeny. Molecular Phylogenetics and Evolution, Volume 50, Issue 2, February 2009, Pages 345-363 doi: 10.1016 / j.ympev.2008.11.013
- ^ Thomas J. Near, A. Dornburg, RI Eytan, BP Keck, WL Smith, KL Kuhn, JA Moore, SA Price, FT Burbrink, M. Friedman & PC Wainwright. 2013. Phylogeny and tempo of diversification in the superradiation of spiny-rayed fishes. Proceedings of the National Academy of Sciences of the United States of America. 101: 12738-21743. doi: 10.1073 / pnas.1304661110 , PDF
- ↑ Ricardo Betancur-R., Richard E. Broughton, Edward O. Wiley, Kent Carpenter, J. Andrés López, Chenhong Li, Nancy I. Holcroft, Dahiana Arcila, Millicent Sanciangco, James C Cureton II, Feifei Zhang, Thaddaeus Buser, Matthew A. Campbell, Jesus A Ballesteros, Adela Roa-Varon, Stuart Willis, W. Calvin Borden, Thaine Rowley, Paulette C. Reneau, Daniel J. Hough, Guoqing Lu, Terry Grande, Gloria Arratia, Guillermo Ortí: The Tree of Life and a New Classification of Bony Fishes. PLoS Currents Tree of Life. 2013 Apr 18, Edition 1. doi: 10.1371 / currents.tol.53ba26640df0ccaee75bb165c8c26288 , PDF ( Memento of the original from October 13, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
Web links
- Barbed mouths on Fishbase.org (English)