Phylogenetics of American scallops (Bivalvia: Pectinidae) based on partial 16S and 12S ribosomal RNA gene sequences

  title={Phylogenetics of American scallops (Bivalvia: Pectinidae) based on partial 16S and 12S ribosomal RNA gene sequences},
  author={Carlos Felipe Saavedra and Juan B. Pe{\~n}a},
  journal={Marine Biology},
Pectinids constitute one of the most conspicuous groups of marine bivalves, and include some of the most important species from the point of view of fisheries and aquaculture. In spite of this, their systematics and evolution are not well understood. Only two molecular phylogenetic analyses based on relatively wide taxonomic samplings have been published. These studies largely neglected American species, some of which are central for testing current models of pectinid evolution and… 

DNA barcoding and phylogenetic analysis of Pectinidae (Mollusca: Bivalvia) based on mitochondrial COI and 16S rRNA genes

The results are almost consistent with Waller's classification, which was proposed on the basis of shell microstructure and the morphological characteristics of juveniles, and evidenced that these scallop species can be efficiently identified by DNA barcoding.

Research Article: Molecular phylogeny of bivalve families (Arcidae, Chamidae, Margaritidae, Ostreidae, Veneridae) in the Persian Gulf

A survey and molecular analysis was conducted to determine bivalve species diversity in the Persian Gulf and it was found that these species in Persian Gulf are classified in sister clades with high bootstraps except Pinctada.

Complex mitogenomic rearrangements within the Pectinidae (Mollusca: Bivalvia)

Examination of the mitochondrial genome of a member of Chlamydinae, Mimachlamys varia, reveals incongruities between phylogenies based on mitochondrial protein-coding versus rRNA genes within the Pectinidae, suggesting that locus sampling affects phylogenetic inference at the scale of the family.

The Black Sea Flexopecten species-complex (Mollusca: Bivalvia: Pectinidae): Shell morphology and 16S rDNA variation

It is concluded that the Black Sea form represents an eastern extension of the Mediterranean scallop F. glaber, characterized by a significant lack of genetic variability when compared to the Mediterranean form, although it does contain new haplotypes not found in that species.

Taxonomic study of scallops (Pectinidae: mollusca, bivalvia) from Pliocene deposits (Almería, SE Spain)

A taxonomic study has been carried out on scallops occurring in the lower-earliest middle Pliocene deposits of the Campo de Dalias, Almeria-Nijar Basin, and Carboneras Basin and the phylogenetic classification modifies the species attributions formerly used.

Evolutionary relationships of the Tehuelche scallop Aequipecten tehuelchus (Bivalvia: Pectinidae) from the south-western Atlantic Ocean

The phylogenetic analysis indicates that the two putative subspecies of the Tehuelche scallop together with F. felipponei form a monophyletic clade, without differentiating at the specific level, however, further analysis using genes with faster evolution rate are needed to corroborate it.



Molecular Data from the 16S rRNA Gene for the Phylogeny of Pectinidae (Mollusca: Bivalvia)

Chlamys are polyphyletic and do not support the assignment of these species to the two subfamilies Chlamydinae and Pectininae, and the minimal genetic distance between P. maximus and P. jacobeus suggests that they could belong to the same species.


Although the object of phylogenetics and taxonomy should be discriminated, molecular phylogenetic studies thus provide criteria to see through convergence at various levels and will contribute much to improve existing classification systems.

What can 18S rDNA do for bivalve phylogeny?

The analysis of 11 published complete molluscan sequences and two new ones,Arca noae andAtrina pectinata, reveals considerable differences in relative substitution rates, and tree reconstructions by parsimony, neighbor-joining, and maximum-likelihood differ in regard to the position of the eulamellibranch family Mactridae and ofCrassostrea.

The Evolution of Chlamys lMolluscac Bivalviac Pectinidaer in the Tropical Western Atlantic and Eastern Pacific

The results suggest that: (1) eurytopy bestows resistance to both extinction and spéciation; (2) long-distance dispersal facilitates allopatric spécia­ tion but so also does lecithotrophy in reef habitats; (3) evolution within som e scallop clades has been very rapid; and (4) gene flow betw een Berm uda and the Antilles was interrupted during the late Pleistocene.

Molecular phylogeny of the Bivalvia inferred from 18S rDNA sequences with particular reference to the Pteriomorphia

A phylogenetic hypothesis is proposed showing Mytiloidea and Arcoidea as the basal pteriomorph groups, the latter giving rise to the clade uniting the pinnoid-ostreoid-pterioid and the anomioid-limoid-pectinoid lines.

Molecular evidence on the evolution of the Bivalvia

  • D. Campbell
  • Biology, Geography
    Geological Society, London, Special Publications
  • 2000
Comparing new and published morphological phylogenies with new analyses based on 18S gene sequences suggests that both types of evidence are converging on a common phylogeny; however, differences remain to be resolved by further study.