The phylogenetic relationships of species of the mussel genus Ptychobranchus Simpson, 1900 were examined using the mitochondrial DNA sequences of the ND1 and 16S gene regions. A total of 31 individuals representing the five species are included in this analysis. Outgroups were drawn from other unionid genera previously shown to be closely related to Ptychobranchus. Phylogenetic analysis was conducted using Bayesian methods applying several data-partitioning strategies. The results of all analyses support the monophyly of Ptychobranchus, and the interrelationships of its constituent species are consistent across all analyses. Ptychobranchus occidentalis (Conrad, 1836) is recovered as paraphyletic with P. fasciolaris (Rafinesque, 1820). Molecular analyses indicate that Ptychobranchus jonesi van der Schalie, 1934 is a member of the genus, and character state reconstruction predicts that it should possess the complex conglutinate that is found in other species of Ptychobranchus.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.