A taxonomic revision of Parachela with descriptions of two new species (Cypriniformes: Xenocyprididae).

The taxonomy of the Parachela-Oxygaster-Macrochirichthys clade of Xenocyprididae has been confused since the original descriptions of Parachela oxygastroides and Parachela hypophthalmus in the mid-19th century. The confusion seems attributable to the substantial intraspecific variation in color and other morphological characteristics of species of Oxygaster and Parachela. Morphological data on 401 specimens from throughout the range of Parachela and molecular phylogenetic analyses indicate that six available species names for Parachela are valid: Parachela cyanea, P.

Species of Garra (Cyprinidae: Labeoninae) in the Salween River basin with description of an enigmatic new species from the Ataran River drainage of Thailand and Myanmar.

Garra panitvongi, new species, is described from the Ataran River drainage, Salween River basin, of southeastern Myanmar and western Thailand. It is the sixth species of Garra known from the Salween River basin and is readily distinguished from all congeners by the red-orange color of the body and caudal fin, and a pointed proboscis with a blue stripe on each side from the anterior margin of the orbit to the tip of the proboscis and with the stripes forming a V-shape. Garra panitvongi is known in the aquarium trade as the Redtail Garra.

Review of the spotted lizard loaches, Pseudohomaloptera (Cypriniformes: Balitoridae) with a re-description of Pseudohomaloptera sexmaculata and description of a new species from Sumatra.

A review of the six recognized species of Pseudohomaloptera is provided. Counts in the original description of Pseudohomaloptera sexmaculata Fowler (1934) were incorrect and led to confusion in identifying populations of Pseudohomaloptera in mainland Southeast Asia, and the species is re-described. The validity of Homaloptera septemmaculata Fowler (1934) is investigated and confirmed as a junior synonym of P.

Genomic Organization of Repetitive DNA Elements and Extensive Karyotype Diversity of Silurid Catfishes (Teleostei: Siluriformes): A Comparative Cytogenetic Approach.

The catfish family Siluridae contains 107 described species distributed in Asia, but with some distributed in Europe. In this study, karyotypes and other chromosomal characteristics of 15 species from eight genera were examined using conventional and molecular cytogenetic protocols. Our results showed the diploid number (2) to be highly divergent among species, ranging from 2 = 40 to 92, with the modal frequency comprising 56 to 64 chromosomes.