| Abstract | Aphroditiformia represents one of the most successful radiations of annelids, and is therefore an interesting model to understand morphological and functional evolution. Previous phylogenetic analyses yielded most families as monophyletic but excluded anchialine and interstitial species while failing to recover relationships within Sigalionidae. Here we address these shortcomings through the analysis of four molecular markers and 87 morphological characters sampled across 127 species under the assumptions of parsimony and model-based methods. Of the 34 newly sequenced taxa, five anchialine and 24 interstitial species were included, with increased representation of Sigalionidae. An additional 28 elusive Sigalionidae taxa were included, represented only by morphological partitions. Molecular and morphological partitions were evaluated under exhaustive sensitivity analyses, testing the effects of alignment algorithms and optimization criteria on tree topologies. Our trees congruently recovered six clades corresponding to the families within Aphroditiformia: Acoetidae, Aphroditidae, Eulepethidae, Iphionidae, Polynoidae and Sigalionidae, respectively. An anchialine polynoid lineage was nested among strictly deep sea species, and interstitial pisionids and pholoids formed two independent clades nested within Sigalionidae. Additionally, Sigalionidae resulted in four clades, defined by combinations of apomorphies, and hereby we propose the subfamilies Pelogeniinae, Pholoinae, Pisioninae, Sthenelanellinae, as well as the provisionally included polyphyletic Sigalioninae. |
| Text | 398876 2018 10.1111/cla.12202 Scopus 2 s2.0 85020447446 ISI Web of Science WOS 000431977500001 Aphroditiformia Phylogeny and systematics of Aphroditiformia Gonzalez B.C.; Martinez A.; Borda E.; Iliffe T.M.; Eibye Jacobsen D.; Worsaae K. Marine Biological Section, Department of Biology, University of Copenhagen, Universitetsparken 4, 1st floor, Copenhagen Ø, 2100, , Denmark; Institute for Ecosystems Study, Italian National Research Council, Largo Tonolli 5, Verbania, 28922, , Italy; Marine Biology Department, Texas A M University at Galveston, 1001 Texas Clipper Road, Galveston, TX, 77553, , United States; Natural History Museum of Denmark, Zoological Museum, Universitetsparken 15, Copenhagen Ø, 2100, , , Denmark; Natural History Museum of Denmark, Zoological Museum, Universitetsparken 15, Copenhagen Ø, 2100, , , Denmark Aphroditiformia represents one of the most successful radiations of annelids, and is therefore an interesting model to understand morphological and functional evolution. Previous phylogenetic analyses yielded most families as monophyletic but excluded anchialine and interstitial species while failing to recover relationships within Sigalionidae. Here we address these shortcomings through the analysis of four molecular markers and 87 morphological characters sampled across 127 species under the assumptions of parsimony and model based methods. Of the 34 newly sequenced taxa, five anchialine and 24 interstitial species were included, with increased representation of Sigalionidae. An additional 28 elusive Sigalionidae taxa were included, represented only by morphological partitions. Molecular and morphological partitions were evaluated under exhaustive sensitivity analyses, testing the effects of alignment algorithms and optimization criteria on tree topologies. Our trees congruently recovered six clades corresponding to the families within Aphroditiformia Acoetidae, Aphroditidae, Eulepethidae, Iphionidae, Polynoidae and Sigalionidae, respectively. An anchialine polynoid lineage was nested among strictly deep sea species, and interstitial pisionids and pholoids formed two independent clades nested within Sigalionidae. Additionally, Sigalionidae resulted in four clades, defined by combinations of apomorphies, and hereby we propose the subfamilies Pelogeniinae, Pholoinae, Pisioninae, Sthenelanellinae, as well as the provisionally included polyphyletic Sigalioninae. 34 Published version http //www.scopus.com/inward/record.url eid=2 s2.0 85020447446 partnerID=q2rCbXpz Articolo 2018_Cladistics_34_225_259.pdf Articolo in rivista Meckler Pub., 0748 3007 Cladistics Print Cladistics Print Cladistics Print Cladistics Print alejandro.martinezgarcia MARTINEZ GARCIA ALEJANDRO |
