Scallops (Pectinidae)are one of the most diverse families of bivalves and have been a model system in evolutionary biology. However, in order to understand phenotypic evolution, the Pectinidae needs to be placed in a deeper phylogenetic framework within the superfamily Pectinoidea. We reconstructed a molecular phylogeny for 60 species from four of the five extant families within the Pectinoidea using a five gene dataset (12S, 16S, 18S, 28S rRNAs and histone H3). Our analyses give consistent support for the non-monophyly of the Propeamussiidae, with a subset of species as the sister group to the Pectinidae, the Propeamussiidae type species as sister to the Spondylidae, and the majority of propeamussiid taxa sister to the Spondylidae + Pr. dalli. This topology represents a previously undescribed relationship of pectinoidean families. Our results suggest a single origin for eyes within the superfamily and likely multiple instances of loss for these characters. However, it is now evident that reconstructing the evolutionary relationships of Pectinoidea will require a more comprehensive taxonomic sampling of the Propeamussiidae sensu lato.
CITATION STYLE
Smedley, G. D., Audino, J. A., Grula, C., Porath-Krause, A., Pairett, A. N., Alejandrino, A., … Serb, J. M. (2019). Molecular phylogeny of the Pectinoidea (Bivalvia)indicates Propeamussiidae to be a non-monophyletic family with one clade sister to the scallops (Pectinidae). Molecular Phylogenetics and Evolution, 137, 293–299. https://doi.org/10.1016/j.ympev.2019.05.006
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