Phylogenetic analysis of Biomphalaria tenagophila (Orbigny, 1835) (Mollusca: Gastropoda)

Mitogenome of the small abalone Haliotis diversicolor Reeve and phylogenetic analysis within Gastropoda

“…It is the obvious characteristic that A + T content of the third codon positions is higher than that of the first and second positions. The relative high A + T content at third positions is common among published gastropods mitochondrial protein-coding sequences (Terrett et al, 1996;Jannotti-Passos et al, 2010). Even the A + T content at the third codon positions of Biomphalaria tenagophila mtDNA is up to 91.6% (Jannotti-Passos et al, 2010).…”

“…The relative high A + T content at third positions is common among published gastropods mitochondrial protein-coding sequences (Terrett et al, 1996;Jannotti-Passos et al, 2010). Even the A + T content at the third codon positions of Biomphalaria tenagophila mtDNA is up to 91.6% (Jannotti-Passos et al, 2010). The estimation of nonsynonymous (Ka) and synonymous (Ks) substitution rate is of great significance in understanding evolutionary dynamics of protein-coding sequences across closely related species (Ohta, 1995;Fay and Wu, 2003).…”

Physella acuta: atypical mitochondrial gene order among panpulmonates (Gastropoda)

“…Based on phylogenetic analysis of 16S, 18S and CO1 mt gene sequences, Hygrophila was divided into five families: Acroloxidae, Chilinoidae, Planorbidae, Lymnaeidae and Physidae ( Dayrat et al , 2011 ). Perhaps because the mt genomes of freshwater panpulmonates are considered difficult to sequence ( White et al , 2011 ), so far complete mt genomes are available only for two families of Hygrophila: Planorbidae [ Biomphalaria glabrata ( DeJong, Emery & Adema, 2004 ) and B. tenagophila ( Jannotti-Passos et al , 2010 )] and Lymnaeidae [ Radix balthica ( Feldmeyer, Hoffmeier & Pfenninger, 2010 ) and Galba pervia ( Liu et al , 2012 )]. No mt genome sequences have previously been available for the family Physidae.…”

Fingerprint of Biomphalaria arabica, the intermediate host of Schistosoma mansoni in Saudi Arabia, using RAPD-PCR

“…The rRNA gene complex is common to all eukaryotes and is well suited for taxonomic studies as it contains regions which evolve at different rates, thus permitting analysis of relationships over a wide taxonomic level. In general the spacer regions are less conserved than the coding regions (DeJong et al, 2004;Jannotti-Passos et al, 2010;Johnston et al, 1993;Kane and Rollinson, 1994;Rollinson and Kane, 1991;Simpson et al, 1984;Stothard et al, 1996). Among the genetic markers used so far in studies on Biomphalaria, the nuclear ribosomal DNA (rDNA) internal transcribed spacers (ITS) have been shown to be particularly useful for species identification and phylogenetic reconstruction (Campbell et al, 2000;Pointier et al, 2005;Vidigal et al, 2000a).…”