The oldest peracarid crustacean reveals a Late Devonian freshwater colonization by isopod relatives

Robin, Ninon; Guériau, Pierre; Luque, Javier; Jarvis, DG; Daley, Allison C.; Vonk, Ronald

doi:10.1098/rsbl.2021.0226

Cited by 13 publications

(11 citation statements)

References 62 publications

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“…Unfortunately, given the small number of chromosome scale crustacean genome assemblies (Bernot et al 2022), probing phylogenetic signal from synteny in pancrustaceans is dependent on concerted genome sequencing efforts. Finally, in light of the recent discoveries of a number of incredibly preserved pancrustacean fossils (Zhang et al 2007; Wolfe et al 2016; Luque and Gerken 2019; Zhai et al 2019; Robin et al 2021) it is exciting to consider that new fossil discoveries may inform our understanding of the tempo, order of character acquisition, and patterns of diversity through time in pancrustacean evolution.…”

Section: Discussionmentioning

confidence: 99%

Major revisions in pancrustacean phylogeny with recommendations for resolving challenging nodes

Bernot

Owen

Wolfe

et al. 2022

Preprint

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The clade Pancrustacea, comprising crustaceans and hexapods, is the most diverse group of animals on earth, comprising more than 80% of animal species, and has dominated much of the planet for over 500 million years. It has been the subject of a number of recent phylogenomic analyses, but despite multiple analyses of hundreds of genes, relationships within Pancrustacea show a notable lack of stability. In this study, the pancrustacean phylogeny is estimated with expanded taxon sampling, particularly of malacostracans, using 106 transcriptomes and genomes and a precise tree-based approach to orthology inference. We completed more than 50 independent tree searches on continually expanded taxon sets using ML, BI, and coalescent methods, and our results show that outgroup selection and changes in taxon sampling have a large impact on the topologies recovered. We show that small differences in taxon sampling have a large impact on ortholog identification and phylogenetic estimation. By analyzing only shared orthologs between two slightly different taxon sets, we show that the differences in the resulting species trees are due to the effects of taxon sampling on the phylogenetic estimation, not on ortholog identification. In our final taxon set, we identify 576 protein-coding orthologs comprising 121,508 amino acid positions. We compare trees resulting from our analyses with others from the literature to explore the large tree space of pancrustacean phylogenetic estimates and find that statistical topology tests of our dataset reject the previously published trees in favor of the ML trees produced here. Our results reject a number of clades including Caridoida, Eucarida, Multicrustacea, Vericrustacea, and Syncarida but support other classically recognized taxa, such as the Peracarida, and suggest some new clades. In contrast to the traditional Eucarida, we recover a novel relationship between decapods, euphausiids, and two clades of syncarids that we refer to as the Syneucarida. Additionally, with denser taxon sampling, we find Stomatopoda as sister to this clade. In recognition of these new relationships, we propose the name Stomatocaridea for Stomatopoda, Eucarida, and the two separate clades of "Syncarida", which divides Malacostraca into three clades: Leptostraca, Peracarida, and Stomatocaridea. A new Bayesian divergence time estimation is conducted using 13 vetted fossils. We review our results in the context of other pancrustacean analyses and highlight key taxa and strategies for future phylogenetic studies.

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Section: Discussionmentioning

confidence: 99%

Major revisions in pancrustacean phylogeny with recommendations for resolving challenging nodes

Bernot

Owen

Wolfe

et al. 2022

Preprint

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“…nov. podem ser atribuídas à atividade de crustáceos, possivelmente Isopoda ou outros Peracarida. Os registros mais antigos de fósseis de Isopoda datam do Carbonífero Tardio, mas dados moleculares sugerem uma origem ordoviciana (Robin, Gueriau, Luque, Jarvis, Daley & Vonk, 2021). Já os fósseis mais antigos de Peracarida datam do Devoniano (Robin et al, 2021).…”

Section: Discussionunclassified

Review of Oliveirania santa catharinae (sic) Maury 1927 and associated ichnofossils (Itararé Group, Late Carboniferous of Paraná Basin, Brazil)

Silva¹,

Fernandes²

2021

TerraPlural

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The sedimentary layers of Anitápolis, Santa Catarina, were the subject of relevant discussions about age and paleoenvironment in the first half of the 20th century. Today they are correlated to the ritmites from Itararé Group, but some of the fossils that are part of these studies were not subsequently revised. This is the case of Oliveirania santa catharinae (sic) Maury 1927, a species originally attributed to annelids, and the ichnofossils attributed to it by association. The Annelida fossils were considered here as pseudofossils of inorganic origin. The ichnofossils attributed to Oliveirania were redescribed as a new ichnospecies, Pterichnus mauryae isp. nov., possibly related to the activity of crustaceans. This is the first occurrence of Pterichnus in Brazil and the oldest in the world.

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“…Peracarida body fossils have been reported from the Devonian (Robin et al . 2021), and of those of Isopoda as early as the Mississippian (Schram 1970; Broly et al . 2013).…”

Section: Probable Tracemakersmentioning

confidence: 99%

A review of the glacial environment arthropod trace fossilsUmfoloziaandWarvichniumwith the description of new ichnotaxa

de Barros,

de C. P. e M. Peixoto,

Lima

et al. 2023

Papers in Palaeontology

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Trace fossils are important records of the presence and behaviour of animals in the past, especially in deposits where few body fossils are preserved. They tend to provide the main palaeobiological record for past glacial environments, and are thus very important for understanding the ecology of these palaeoenvironments. Two ichnogenera are common in glacial sediments: Umfolozia and Warvichnium. Both Umfolozia and Warvichnium are attributed to arthropods; the former occurs across the Late Palaeozoic Ice Age (LPIA) and the latter occurs during both the LPIA and the Quaternary glacial event. Here, we review the stratigraphic record, ichnotaxonomy, palaeoecology, palaeoenvironments and possible tracemakers of these two ichnogenera. In addition to assessing morphological ichnotaxobases, we use multivariate morphometric analysis and inferential statistical tests to support our ichnotaxonomic revisions. The diagnosis of Umfolozia is revised, with the description of a new ichnospecies, Umfolozia terere, and the emendation of Umfolozia riojana (formerly Umfolozia longula). We revised Warvichnium, maintaining the original Warvichnium ulbrichi and allocating two morphologies to the ichnogenus Irichnus: Irichnus saltatorius and I. paripinnatus isp. nov. These trace fossils record several behaviours, and have implications for palaeoenvironmental interpretations and the evolution of invertebrate ecosystems. Using Umfolozia and Warvichnium as case studies, we demonstrate the application of morphometric analysis in ichnotaxonomy and highlight this as a tool that may be applied to other trace‐fossil groups.

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The oldest peracarid crustacean reveals a Late Devonian freshwater colonization by isopod relatives

Cited by 13 publications

References 62 publications

Major revisions in pancrustacean phylogeny with recommendations for resolving challenging nodes

Major revisions in pancrustacean phylogeny with recommendations for resolving challenging nodes

Review of Oliveirania santa catharinae (sic) Maury 1927 and associated ichnofossils (Itararé Group, Late Carboniferous of Paraná Basin, Brazil)

A review of the glacial environment arthropod trace fossilsUmfoloziaandWarvichniumwith the description of new ichnotaxa

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