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A phylogenetic analysis of rasborin fishes (Teleostei, Cyprinidae)
Stockholm University, Faculty of Science, Department of Zoology. (Systematic Zoology)
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The Danioninae (sensu lato) were until recently considered to be a paraphyletic group, comprising about 200 species and distributed over Africa and southern and eastern Asia. There was no morphological diagnosis for the Danioninae, and also the composition of the subfamily, and the interrelationships of included genera have been contentious. I have analysed morphological and DNA data from nearly all Asian genera and a few African genera of Danioninae (sensu stricto) with the objective of elucidating in particular the interrelationships among species of the large genus Rasbora, and the relationship of this genus to other danionines. Character optimization show the long intercostal ligament to be a synapomorphy of the Cypriniformes and the Cyprinidae to be diagnosed by the presence of the Y-shaped ligament, connecting the kinethmoid and mesethmoid. The Danioninae, however, are characterized by the absence of the Y-shaped ligament, here interpreted as a secondary loss. Phylogenetic analyses using morphological and molecular data show that the Danioninae are monophyletic with the exclusion of a group of East Asian species, now recognized as the Opsariichthyinae. By the exclusion of the Opsariichthyinae, the East Asian extension of the Danioninae becomes limited to the Pearl River basin in southern China. A phylogenetic analysis of the Middle East species Barilius mesopotamicus confirms that it is an Asian species of the Danioninae. The Asian distribution of the Danioninae is thus expanded from southeastern Iran to the Tigris-Euphrates River basin. Danioninae (sensu stricto) fall into three major groups, the Rasborini, and the Danionini with subtribes Danionina and Chedrina. The danionin foramen, a foramen in the cleithrum, is a synapomorphy of the Danionina. The Chedrina are characterized by the postcleithrum absent or greatly reduced. The rasborin process, a small process on epibranchial 4, is a synapomorphy of the Rasborini. The morphological phylogenetic analysis suggests the presence of an opercular canal as a synapomorphy of Rasbora, but this is not corroborated by the molecular phylogenetic analysis. In the molecular phylogenetic analysis the distribution of species of Rasbora largely falls into two areas, viz., the Indian region, and the Indo-Malayan region, divided by the western Shan Plateau and the Tenasserim Range. Morphological and molecular phylogenetic analyses of the Danioninae resulted in the discovery of seven new genera, five rasborins and two danionins, and one new danionin species.

Place, publisher, year, edition, pages
Stockholm: Department of Zoology, Stockholm University , 2010. , 23 p.
Keyword [en]
Rasbora, Chedrina, Danionina, Danionini, Rasborini, Danioninae, Opsariichthyinae, Cyprinidae, Cypriniformes, phylogeny, systematics, Africa, Asia
Research subject
Systematic Zoology
Identifiers
URN: urn:nbn:se:su:diva-43440ISBN: 978-91-7447-165-6 (print)OAI: oai:DiVA.org:su-43440DiVA: diva2:356914
Public defence
2010-11-18, Lilla hörsalen, Naturhistoriska riksmuseet, Frescativägen 40, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: Submitted. Paper 5: Submitted. Paper 6: Submitted. Paper 7: Manuscript.Available from: 2010-10-27 Created: 2010-10-13 Last updated: 2010-10-15Bibliographically approved
List of papers
1. Molecular phylogenetic interrelationships of the south Asian cyprinid genera Danio, Devario and Microrasbora (Teleostei, Cyprinidae, Danioninae)
Open this publication in new window or tab >>Molecular phylogenetic interrelationships of the south Asian cyprinid genera Danio, Devario and Microrasbora (Teleostei, Cyprinidae, Danioninae)
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2009 (English)In: Zoologica Scripta, ISSN 0300-3256, E-ISSN 1463-6409, Vol. 38, no 3, 237-256 p.Article in journal (Refereed) Published
Abstract [en]

Molecular analysis of mitochondrial cytochrome b sequences from 159 species of the family Cyprinidae supports the subfamily Danioninae, of which Rasborinae is shown to be a junior synonym. Analysis of combined cytochrome b and a fragment of the nuclear rhodopsin gene from 68 species, including 43 species representing the subfamily Danioninae, supports phylogenetic distinctness of Danio and Devario. In the combined molecular analysis Microrasbora rubescens, Chela, Laubuca, Devario, and Inlecypris form a clade with M. gatesi, M. nana and M. kubotai being in sister group position to the rest. The sister group of this Devario clade is Danio. Inlecypris is synonymized with Devario. Microdevario, new genus, is proposed for M. gatesi, M. nana and M. kubotai, supported by morphological characters. In the cytochrome b analysis, M. rubescens falls outside Devario, and there is no morphological support for including M. rubescens in Devario. In the cytochrome b analysis Esomus+Danionella is the sister group of Danio and Devario clades, whereas in individual rhodopsin and combined analyses Esomus is the sister group of Danio, and of Danio and the

Devario clade, respectively. Sundadanio presents at least one strong morphological synapomorphy with Danio, but is positioned in molecular trees either as a member of the Cyprininae or as sister group of the remaining Danioninae. In the morphological analysis, small-sized species grouped together based on shared reductions that are not necessarily synapomorphies. In the molecular analysis, small-sized species such as Danionella and Sundadanio possess long branches and their position varies, but they did not group together. This suggests morphological homoplasy, but phylogenetic positions are not well supported in the molecular analyses.

National Category
Natural Sciences
Identifiers
urn:nbn:se:su:diva-43444 (URN)10.1111/j.1463-6409.2008.00373.x (DOI)
Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2017-12-12Bibliographically approved
2. Phylogenetic analysis of the genus Rasbora (Teleostei: Cyprinidae)
Open this publication in new window or tab >>Phylogenetic analysis of the genus Rasbora (Teleostei: Cyprinidae)
2010 (English)In: Zoologica Scripta, ISSN 0300-3256, E-ISSN 1463-6409, Vol. 39, no 2, 155-176 p.Article in journal (Refereed) Published
Abstract [en]

A phylogenetic analysis was conducted based on 35 cyprinid taxa, including 29 species of Rasbora, and 41 morphological characters. A strict consensus tree from four equally parsimonious trees recovered rasborins as a monophyletic group characterized by (i) presence of dark supra-anal pigment and subpeduncular streak, (ii) 5–6 branched anal-fin rays, (iii) dorsal-fin insertion 1–3 scales behind pelvic-fin insertion, (iv) lateral process of second vertebra more or less straight, (v) 1–5 more abdominal than caudal vertebrae, (vi) absence of foramen in anterior wall of horizontal limb of the cleithrum, (vii) presence of rasborin process on epibranchial 4, and (viii) interhyal well ossified. Rasbora sensu stricto can be distinguished from all other rasborin genera by the presence of an opercular canal. Four new genera, viz. Brevibora, n. gen., Kottelatia, n, gen., Rasbosoma, n. gen. and Trigonopoma, n. gen., are recognized and described.

National Category
Natural Sciences
Identifiers
urn:nbn:se:su:diva-43445 (URN)10.1111/j.1463-6409.2009.00409.x (DOI)000274454600004 ()
Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2017-12-12Bibliographically approved
3. Betadevario ramachandrani, a new danionine genus and species from the Western Ghats of India (Teleostei: Cyprinidae: Danioninae)
Open this publication in new window or tab >>Betadevario ramachandrani, a new danionine genus and species from the Western Ghats of India (Teleostei: Cyprinidae: Danioninae)
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2010 (English)In: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, Vol. 2519, 31-47 p.Article in journal (Refereed) Published
Abstract [en]

Betadevario, new genus, with the single species B. ramachandrani, new species, from Karnataka, southwestern India, is closely related to Devario but differs from it in having two pairs of long barbels (vs. two pairs of short or rudimentary barbels, or barbels absent), wider cleithral spot which extends to cover three scales horizontally (vs. covering only one scale in width), long and low laminar preorbital process (vs. absent or a slender pointed spine-like process) along the anterior margin of the orbit, a unique flank colour pattern with a wide dark band along the lower side, bordered dorsally by a wide light stripe (vs. vertical bars, or stripes narrow and usually in greater number).

Keyword
Karnataka, endemism, Devario, Danio, cytochrome b, rhodopsin, phylogeny
National Category
Natural Sciences
Identifiers
urn:nbn:se:su:diva-43446 (URN)000279252200002 ()
Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2017-12-12Bibliographically approved
4. Phylogenetic position of rasborin cyprinids and monophyly of major lineages among the Danioninae, based on morphological characters (Cypriniformes: Cyprinidae)
Open this publication in new window or tab >>Phylogenetic position of rasborin cyprinids and monophyly of major lineages among the Danioninae, based on morphological characters (Cypriniformes: Cyprinidae)
(English)Article in journal (Refereed) Submitted
Identifiers
urn:nbn:se:su:diva-43447 (URN)
Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2010-10-15Bibliographically approved
5. Western boundary of the subfamily Danioninae in Asia (Teleostei, Cyprinidae): derived from the systematic position of Barilius mesopotamicus based on molecular and morphological data
Open this publication in new window or tab >>Western boundary of the subfamily Danioninae in Asia (Teleostei, Cyprinidae): derived from the systematic position of Barilius mesopotamicus based on molecular and morphological data
2011 (English)In: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, no 2880, 31-40 p.Article in journal (Refereed) Published
National Category
Zoology
Identifiers
urn:nbn:se:su:diva-43448 (URN)000290631500003 ()
Note
authorCount :3Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2017-12-12Bibliographically approved
6. Phylogenetic significance of the Y-shaped and long intercostal ligaments in the Cypriniformes (Actinopterygii: Ostariophysi)
Open this publication in new window or tab >>Phylogenetic significance of the Y-shaped and long intercostal ligaments in the Cypriniformes (Actinopterygii: Ostariophysi)
(English)Article in journal (Refereed) Submitted
Identifiers
urn:nbn:se:su:diva-43449 (URN)
Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2010-10-15Bibliographically approved
7. Molecular systematics and phylogeography of the genus Rasbora and related genera (Teleostei: Cyprinidae)
Open this publication in new window or tab >>Molecular systematics and phylogeography of the genus Rasbora and related genera (Teleostei: Cyprinidae)
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(English)Manuscript (preprint) (Other academic)
Identifiers
urn:nbn:se:su:diva-43450 (URN)
Available from: 2010-10-13 Created: 2010-10-13 Last updated: 2010-10-15Bibliographically approved

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