Morphological phylogeny of the Tegulinae (Mollusca: Vetigastropoda) reinforces a Turbinidae position

Dornellas, Ana Paula S.; Couto, Diogo Ribeiro; Simone, Luiz Ricardo L.

doi:10.1111/cla.12400

Cited by 3 publications

(2 citation statements)

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“…A more conservative alternative, which we propose here, is to transfer both clades to Turbinidae. Before being given familial rank by Williams (2012) , Tegulinae was already treated as a subfamily of Turbinidae ( Bouchet and Rocroi 2005 ; Williams et al 2008 ), which was also supported recently by morphological cladistic analyses ( Dornellas et al 2020 ). Our redefined Turbinidae differs in composition from that of Dornellas et al (2020) in that we include Cittarium , but not Phasianella , according to our phylogenomic results ( Fig.…”

Section: Discussionmentioning

confidence: 79%

“…nov. , with Tectus Montfort, 1810 as the type genus. Two genera ( Callistele and Carolesia ) have not yet been sampled in molecular phylogenies, but morphological analyses place Carolesia in Tegulinae ( Dornellas et al 2020 ). In summary, in our proposed classification Turbinidae consists of subfamilies Turbininae and Prisogasterinae as currently accepted, plus Tegulinae status nov. and Tectinae subfam.…”

Section: Discussionmentioning

confidence: 99%

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Investigating Sources of Conflict in Deep Phylogenomics of Vetigastropod Snails

Cunha

Reimer

2021

Systematic Biology

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Phylogenetic analyses may suffer from multiple sources of error leading to conflict between genes and methods of inference. The evolutionary history of the mollusc clade Vetigastropoda makes them susceptible to these conflicts, their higher level phylogeny remaining largely unresolved. Originating over 350 million years ago, vetigastropods were the dominant marine snails in the Paleozoic. Multiple extinction events and new radiations have resulted in both very long and very short branches and a large extant diversity of over 4000 species. This is the perfect setting of a hard phylogenetic question in which sources of conflict can be explored. We present 41 new transcriptomes across the diversity of vetigastropods (62 terminals total), and provide the first genomic-scale phylogeny for the group. We find that deep divergences differ from previous studies in which long branch attraction was likely pervasive. Robust results leading to changes in taxonomy include the paraphyly of the order Lepetellida and the family Tegulidae. Tectinae subfam. nov. is designated for the clade comprising Tectus, Cittarium and Rochia. For two early divergences, topologies disagreed between concatenated analyses using site heterogeneous models vs. concatenated partitioned analyses and summary coalescent methods. We investigated rate and composition heterogeneity among genes, as well as missing data by locus and by taxon, none of which had an impact on the inferred topologies. We also found no evidence for ancient introgression throughout the phylogeny. We further tested whether uninformative genes and over-partitioning were responsible for this discordance by evaluating the phylogenetic signal of individual genes using likelihood mapping, and by analyzing the most informative genes with a full multispecies coalescent model. We find that most genes are not informative at the two conflicting nodes, but neither this nor gene-wise partitioning are the cause of discordant results. New method implementations that simultaneously integrate amino acid profile mixture models and the multispecies coalescent might be necessary to resolve these and other recalcitrant nodes in the Tree of Life.

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Investigating Sources of Conflict in Deep Phylogenomics of Vetigastropod Snails

Cunha

Reimer

2021

Systematic Biology

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Phylogeography of Agathistoma (Turbinidae, Tegulinae) snails in tropical and southwestern Atlantic

et al. 2021

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The rocky intertidal gastropods Agathistoma viridulum and A. hotessierianum occur from the Caribbean to southern Brazil, with a gap in the equatorial region, giving them an anti-tropical distribution. We used sequences from mitochondrial genes to elucidate the phylogeography of A. viridulum and A. hotessierianum and to infer their relationships to other species of Agathistoma. For A. hotessierianum, haplotype networks and phylogenetic analyses split samples into two distinct groups: one (A. hotessierianum) in the Caribbean region (Greater and Lesser Antilles; Venezuela: Sucre and Isla Margarita) and a new species that we describe from northeastern Brazil. For A. viridulum, genetic analyses split the samples into three groups (Caribbean, northeastern Brazil and southeastern Brazil), but genetic divergence among these was too low for them to be considered species, and morphological differences were not significant. The mtDNA tree identified two clades of eastern Pacific Agathistoma, but many lower-level relationships within Agathistoma were not well resolved, suggesting that more complete taxon sampling and additional genetic data will be needed to establish more robust relationships among Tegulinae.

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