Cytotaxonomy of unionid freshwater mussels (Unionoida, Unionidae) from northeastern Thailand with description of a new species.

ABSTRACT: Morphological and chromosomal characteristics of a number of unionid freshwater mussels were studied from northeastern Thailand. Karyotypes of eight species from seven genera (Chamberlainia, Ensidens, Hyriopsis, Physunio, Pseudodon, Scabies and Trapezoideus) were examined. Six species possess 2n = 38 karyotypes, whereas Scabiescrispata and an unidentified Scabies sp. lack three small chromosome pairs, giving a diploid number of 32. Moreover, the karyotypes of the unidentified Scabies differ from Scabiescrispata as it exhibits a telocentric chromosome pair (6m + 7sm + 2st + 1t). Most of the conchological characters also differ between the two species - adult size, colour pattern, muscle scars, pseudocardinal and lateral teeth. The name Scabiessongkramensis sp. n. is proposed for the unident

SUBMITTER: Kongim B 

PROVIDER: S-EPMC4525026 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature