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Systematics, phylogeny and biogeography
RESEARCH ARTICLE

Marine surf to freshwater: a molecular phylogeny of Donacidae (Bivalvia: Heterodonta)

Elena Moncada A # , Arianna Lord A # , Luiz Ricardo L. Simone B , Daniel Adjei-Boateng C , Philippe Bouchet D , Ellen E. Strong E , Rüdiger Bieler https://orcid.org/0000-0002-9554-1947 F and Gonzalo Giribet https://orcid.org/0000-0002-5467-8429 A *
+ Author Affiliations
- Author Affiliations

A Department of Organismic and Evolutionary Biology, Museum of Comparative Zoology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA.

B Laboratorio de Malacologia, Museu de Zoologia da Universidade de São Paulo, Avenida Nazaré 481, 04263-000 São Paulo, Brazil.

C Department of Fisheries and Watershed Management, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.

D Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205, CNRS, MNHN, UPMC, EPHE, Muséum National d’Histoire Naturelle, Sorbonne Universités, 55 rue Buffon, CP31, F-75005 Paris, France.

E Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, PO Box 37012, MRC 163, Washington, DC 20013, USA.

F Negaunee Integrative Research Center, Field Museum of Natural History, 1400 South DuSable Lake Shore Drive, Chicago, IL 60605, USA.

* Correspondence to: ggiribet@g.harvard.edu
# These authors contributed equally to this paper

Handling Editor: Nerida Wilson

Invertebrate Systematics 36(11) 984-1001 https://doi.org/10.1071/IS22026
Submitted: 8 June 2022  Accepted: 21 August 2022   Published: 3 November 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing.

Abstract

Donacidae is a commercially important family of heterodont bivalves and one of the few bivalve lineages that has successfully colonised brackish and fresh waters. However, to date, no phylogenetic hypothesis exists for this widely distributed group. Here we turn to molecular data from the nuclear and mitochondrial genomes and combine these with the extensive fossil record of donacids to propose an evolutionary hypothesis for the family. Our analyses strongly support the monophyly of Donacidae, including Galatea, Iphigenia and ‘Plebidonaxdeltoides, but render Donax paraphyletic. The subgenus Latona is therefore elevated to genus to accommodate a clade of Indo-Pacific species, while retaining Donax for a clade of mostly Atlantic and American Pacific species, and a few Indo-Pacific species. This latter clade is sister group to Galatea + Iphigenia. The diversification of Donacidae seems to be tightly connected to the opening of the North and South Atlantic Oceans in the Cretaceous, and to the closing of the Tethys Ocean during the Oligocene. Taxonomic actions: Latona columbella (Lamarck, 1818) comb. nov., L. deltoides (Lamarck, 1818) comb. nov., L. dysoni (Reeve, 1854) comb. nov., L. madagascariensis (W. Wood, 1828) comb. nov., L. semisulcata semigranosa (Dunker, 1877) comb. nov., L. spinosa (Gmelin, 1791) comb. nov., L. sordida (Hanley, 1845) comb. nov., L. siliqua (Römer, 1870) comb. nov., L. trifasciata (Linnaeus, 1758) comb. nov. and L. victoris (Fischer-Piette, 1942) comb. nov.

Keywords: biogeography, brackish water, Donax, freshwater, Imparidentia, marine, Mollusca, taxonomy.


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