Phylogenetic analysis of the gastropod genus<i>Calliotropis</i>Seguenza, 1902 (Vetigastropoda: Calliotropidae), including fossil and living species

Pérez, Damián Eduardo; Ferrari, Mariel; Ezcurra, Martín D.

doi:10.1080/14772019.2022.2100288

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…This fragmentary specimen preserving only the base resembles many fossil and recent species of Calliotropis (i.e., Jansen 1994;Pérez et al 2022). Calliotropis today is essentially a deep-water genus and most Cenozoic fossil records are also from deep-water strata (Dall 1909;Pérez et al 2022).…”

Section: Remarksmentioning

confidence: 87%

Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions

Kiel,

Sami,

Taviani

2023

EJT

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Here, we report on 33 molluscan species from Miocene ’Calcari a Lucina’ hydrocarbon-seep deposits in northern Italy. Three new species are described: the chilodontaid gastropod Putzeysia diversii sp. nov., the lucinid bivalve Miltha (sensu lato) romaniae sp. nov., and Sisonia ultimoi sp. nov., a heterodont bivalve of uncertain taxonomic affinity. Fourteen species are described in open nomenclature. The common but enigmatic gastropod species Phasianema taurocrassa is here suggested to belong to the seguenzioid genus Cataegis. Most gastropod species are inhabitants of the deep-sea floor in general, and are not restricted (obligate) to sites of hydrocarbon-seepage. The gastropod Putzeysia diversii sp. nov. and the bivalve Sisonia ultimoi sp. nov. are the geologically oldest members of their genera known to date. While the genus Putzeysia is geographically restricted to the NE Atlantic Ocean and the Mediterranean Sea, Sisonia ultimoi sp. nov. represents another link of the Miocene Mediterranean seep fauna to that of the central Indo-West Pacific Ocean.

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Section: Remarksmentioning

confidence: 87%

Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions

Kiel,

Sami,

Taviani

2023

EJT

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“…(2022), which was composed of 50 extinct and living gastropod species and was analysed with a range of IW k = 1–100. The relationships between species were shown in the MPT found under IW k = 54 (Pérez et al., 2022: figs 4 and 6) and the results with other IW k‐ values were used to discuss the presence/absence of groups in the former tree (Pérez et al., 2022: fig. 4).…”

Section: Discussionmentioning

confidence: 99%

“…Table 2 suggests a range of IW k = 12-20 for this number of terminals, which is outside of the k-values used by the latter authors. Finally, another example is the analysis of the dataset of Pérez et al (2022), which was composed of 50 extinct and living gastropod species and was analysed with a range of IW k = 1-100. The relationships between species were shown in the MPT found under IW k = 54 (Pérez et al, 2022: figs 4 and 6) and the results with other IW k-values were used to discuss the presence/absence of groups in the former tree (Pérez et al, 2022: fig.…”

Section: Implied Weighting Vs Extended Implied Weightingmentioning

confidence: 99%

Exploring the effects of weighting against homoplasy in genealogies of palaeontological phylogenetic matrices

Ezcurra

2024

Cladistics

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Although simulations have shown that implied weighting (IW) outperforms equal weighting (EW) in phylogenetic parsimony analyses, weighting against homoplasy lacks extensive usage in palaeontology. Iterative modifications of several phylogenetic matrices in the last decades resulted in extensive genealogies of datasets that allow the evaluation of differences in the stability of results for alternative character weighting methods directly on empirical data. Each generation was compared against the most recent generation in each genealogy because it is assumed that it is the most comprehensive (higher sampling), revised (fewer misscorings) and complete (lower amount of missing data) matrix of the genealogy. The analyses were conducted on six different genealogies under EW and IW and extended implied weighting (EIW) with a range of concavity constant values (k) between 3 and 30. Pairwise comparisons between trees were conducted using Robinson–Foulds distances normalized by the total number of groups, distortion coefficient, subtree pruning and regrafting moves, and the proportional sum of group dissimilarities. The results consistently show that IW and EIW produce results more similar to those of the last dataset than EW in the vast majority of genealogies and for all comparative measures. This is significant because almost all of these matrices were originally analysed only under EW. Implied weighting and EIW do not outperform each other unambiguously. Euclidean distances based on a principal components analysis of the comparative measures show that different ranges of k‐values retrieve the most similar results to the last generation in different genealogies. There is a significant positive linear correlation between the optimal k‐values and the number of terminals of the last generations. This could be employed to inform about the range of k‐values to be used in phylogenetic analyses based on matrix size but with the caveat that this emergent relationship still relies on a low sample size of genealogies.

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Phylogeny of the longest existing gastropod clade (Pleurotomariida) reconstructed with Bayesian and parsimony methods and its implications on gastropod shell characters

Karapunar,

Höhna,

Nützel

2024

Journal of Systematic Palaeontology

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Phylogenetic analysis of the gastropod genusCalliotropisSeguenza, 1902 (Vetigastropoda: Calliotropidae), including fossil and living species

Cited by 3 publications

References 28 publications

Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions

Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions

Exploring the effects of weighting against homoplasy in genealogies of palaeontological phylogenetic matrices

Phylogeny of the longest existing gastropod clade (Pleurotomariida) reconstructed with Bayesian and parsimony methods and its implications on gastropod shell characters

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