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Tag: ichthyology

New loaches from Myanmar

July 26th, 2013 — 9:03am

Schistura puncticeps, ZRC 53783, paratype, 55.2 mm SL; Myanmar: Shan State: mouth of Nam Paw, shortly after capture. © Bohlen and Šlechtová

A number of new loaches are covered in the latest volume of the journal ‘Ichthyological Exploration of Freshwaters‘, and among them are three species from Myanmar described by Jörg Bohlen and Vendula Šlechtová.

The first, Schistura puncticeps, is currently known only from its type locality, the mouth of Nam Paw stream at its confluence with the Myitnge River, itself a tributary of the Irrawaddy (aka Ayeyarwady) River in Shan state, northeastern Myanmar.

It can be told apart from other Schistura species by the following combination of characters:  dorsal and lateral surfaces of the head covered by dark brown dots; 5-8 large brown blotches along the lateral midline of the body; a large head (head length 20.7-24.9 % SL); a short caudal peduncle (caudal peduncle length 12.2-13.4 % SL); a large eye (4.8-6.6 % SL); no discernable sexual dimorphism.

The specific name is derived from the Latin punctum, meaning ‘dot’, and ceps, a derivation of caput meaning ‘head’, in allusion to the prominently spotted head.

For further information refer to the full, open access paper: Bohlen, J. and Vendula Šlechtová. 2013. Schistura puncticeps, a new species of loach from Myanmar (Cypriniformes: Nemacheilidae). Ichthyological Exploration of Freshwaters 24(1): 85-92

The other two appear to be miniature species and closely-related to one another.

Schistura rubrimaculata; ZRC 53774, paratype, 26.1 mm SL; Myanmar: Magway division: stream Man Chaung; shortly after capture. Right side, reversed. © Bohlen and Šlechtová

S. rubrimaculata is named in reference to the red spot present on either side of the caudal peduncle in live specimens, and can be distinguished from congeners by the following combination of characters: small size (largest known specimen 27.7 mm SL); slender body shape (maximum body depth 103-123 % of body depth at nape); ventral half of body and head white (with silver sheen in life); colour pattern on body composed of a prominent black midlateral stripe and up to six small dorsal saddles; all fins hyaline; dark blotch on base of central unbranched caudal-fin rays, with a median incision at its posterior margin; and a distinct red dot on the side of the caudal peduncle in life, fading when preserved.

It’s been collected from the Man Chaung and Shwe Chaung river systems, both of which are Irrawaddy tributaries draining the eastern slope of the Rakhine Yoma mountains.

Schistura pawensis; ZRC 53776, holotype, 31.3 mm SL; Myanmar: Shan State: Hsipaw; shortly after capture. Right side, reversed. © Bohlen and Šlechtová

Schistura pawensis was discovered at the same locality as S. puncticeps and is named in reference to the Nam Paw stream.

Its distinguishing characters are as follows:  body small (largest known specimen 31.3 mm SL); slender body shape (head depth at nape 1.1-1.2 times in body depth); all specimens with a prominent black midlateral stripe; entire ventral side silvery-white; 6 ½ or 7½ branched dorsal-fin rays; 7-8 + 8 branched caudal-fin rays; anus positioned halfway between pelvic-fin origin and anal-fin origin.

For further information see the full, open access paper: Bohlen, J. and Vendula Šlechtová. 2013. Two new species of Schistura from Myanmar (Teleostei: Nemacheilidae).  Ichthyological Exploration of Freshwaters 24(1): 21-30.

All three species were collected in shallow, clear, flowing water over beds of gravel and do not appear to have entered the ornamental trade to date.

Thanks to Jörg Bohlen.

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Surf the FishNet!

April 3rd, 2013 — 11:56am

Global distribution of records in the FishNet2 database with yellow circles indicating the locations of participating institutions

FishNet2 is the latest incarnation of a collaborative project initiated by the University of Kansas, United States in the late 1990s and currently administrated by Tulane University. Continue reading »

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Speeding Up Science

November 21st, 2012 — 9:39pm

See how ichthyologist Brian Sidlauskas used Facebook to identify 5000 fish specimens collected in the Cuyuni River watershed, Guyana, in order to provide an itemised list to national authorities and get them out of the country for study…

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New Laetacara from northern Brazil

July 16th, 2012 — 8:50pm

© F. P. Ottoni et al.

A new species of the dwarf cichlid genus Laetacara was described in the journal ‘Vertebrate Zoology’ recently, bringing the total number of species in the grouping to seven.

L. flamannellus (Ottoni et al. 2012) is known only from the coastal floodplains of eastern Amapá state, northern Brazil, where it occurs in highly seasonal habitats. Between July and December permanent water is restricted to the major river channels, but during the wet season from January to July these overflow significantly and flood large tracts of the surrounding grasslands and forest. Continue reading »

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Pristolepis rubripinnis sp. nov.

June 15th, 2012 — 10:31am

The perciform genus Pristolepis has a highly-fragmented distribution in southern India, Indochina and the Sunda Islands. A new species from the Western Ghats mountains in southern India, which has been available in the aquarium trade as P. sp. ‘red eye’,  is described this week and published in the mega journal Zootaxa, bringing the number of officially-recognised species to four. Continue reading »

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New Dario species described

June 15th, 2012 — 9:30am

A recently-discovered member of the genus Dario with an interesting history is described from southern India in the journal Zootaxa this week.

This is the first record of the genus in southern India. © Hayath

New species Dario urops is named in reference to the conspicuous ocellus on the caudal peduncle, the presence of which distinguishes it from the other three members of the genus, and it can be further told apart by presence of a horizontal suborbital stripe (vs. absence in congeners), by lacking extended lappets on the dorsal-fin spines (vs. possessing), and unusual vertebral counts (14+14–15= 28–29 vs 11–13+12–14=24–27). Continue reading »

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New Laubuca described

May 14th, 2012 — 10:12am

Laubuca brahmaputraensis is a new species known only from the Brahmaputra River in Bangladesh. No specific type locality is provided in the paper other than ‘Brahmaputra River’, so the extent of its distribution is unclear, and live colouration is currently unknown.

Continue reading »

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Badis singenensis, the most unique badid gets a name – or does it?

April 29th, 2012 — 4:07pm

Stefan van der Voort

Prelude20 December 2011—recently an article by me was published in a German hobbyist magazine and was without notification altered to such extend that it no longer represented my view from the written and submitted version. What follows here is the original, unaltered version, with only the acknowledgements chapter added.

© Stefan van der Voort

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