The Proof is in the Pouch:<i>Tealliocaris</i>is a Peracarid

Jones, Wade T.; Feldmann, Rodney M.; Schram, Frederick R.; Schweitzer, Carrie E.; Maguire, Evin P.

doi:10.18476/pale.v9.a5

Cited by 16 publications

(22 citation statements)

References 40 publications

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“…Pygocephalomorpha is a eumalacostracan fossil clade with a number of symplesiomorphic characters. Pygocephalomorpha were proposed as members of Peracarida; however, a recent phylogeny depicted them in a polytomy in any of three positions: sister to Mysidacea, sister to all non-Mysicadea peracarids, or on the peracarid stem lineage (Jones et al, 2016). Note also the analyses discussed above that exclude Mysida from Peracarida (e.g., , which would mean two of three equally parsimonious positions for Pygocephalomorpha are outside the peracarid crown group.…”

Section: Discussionmentioning

confidence: 99%

“…13). Monophyly has been demonstrated by phylogenetic analysis of morphology (Jones et al, 2016;Poore, 2005;Richter and Scholtz, 2001;Wills et al, 2009;Wirkner and Richter, 2010), and combined morphology and molecular data ). Molecular phylogenies based on ribosomal genes reject the inclusion of Mysida within Peracarida Meland and Willassen, 2007;Spears et al, 2005), while Lophogastrida and Stygiomysida are removed from Mysidacea and found comfortably within Peracarida (Meland and Willassen, 2007;Meland et al, 2015).…”

Section: Crown Peracaridamentioning

confidence: 99%

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Fossil Calibrations for the Arthropod Tree of Life

Wolfe

Daley

Legg³

et al. 2016

Preprint

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Fossil age data and molecular sequences are increasingly combined to establish a timescale for the Tree of Life. Arthropods, as the most species-rich and morphologically disparate animal phylum, have received substantial attention, particularly with regard to questions such as the timing of habitat shifts (e.g., terrestrialisation), genome evolution (e.g., gene family duplication and functional evolution), origins of novel characters and behaviours (e.g., wings and flight, venom, silk), biogeography, rate of diversification (e.g., Cambrian explosion, insect coevolution with angiosperms, evolution of crab body plans), and the evolution of arthropod microbiomes. We present herein a series of rigorously vetted calibration fossils for arthropod evolutionary history, taking into account recently published guidelines for best practice in fossil calibration. These are restricted to Palaeozoic and Mesozoic fossils, no deeper than ordinal taxonomic level, nonetheless resulting in 79 fossil calibrations for 101 clades. This work is especially timely owing to the rapid growth of molecular sequence data and the fact that many included fossils have been described within the last five years. This contribution provides a resource for systematists and other biologists interested in deep-time questions in arthropod evolution.

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Section: Discussionmentioning

confidence: 99%

Section: Crown Peracaridamentioning

confidence: 99%

Fossil Calibrations for the Arthropod Tree of Life

Wolfe

Daley

Legg³

et al. 2016

Preprint

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“…(but see Jones et al . for an interpretation of Tealliocaris as an ingroup of Peracarida). It is of a similar age, about 360 million years old.…”

Section: Discussionmentioning

confidence: 99%

A crustacean with eumalacostracan affinities from the Early Devonian Hunsrück Slate (SW Germany)

Haug¹,

Poschmann

Hörnig

et al. 2016

Papers in Palaeontology

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We describe a new fossil crustacean from the famous Early Devonian Hunsrück Slate, Germany. Other crustacean fossils from this Lagerstätte are of the typical phyllocarid type. The new fossil genus and species Hohensteiniella engeli, represented by a single specimen, exhibits a typical shrimp‐like habitus. H. engeli therefore represents the first crustacean with eumalacostracan affinities from the Hunsrück Slate. Most prominently preserved is the biflagellate antennula, which measures about two‐thirds of the length of the main body. A series of stenopod‐like thoracopods enforce its shrimp‐like appearance. The head shield bears a short rostrum, but appears to have been rather short posteriorly. It remains unclear whether the new species forms an ingroup to Eumalacostraca or is its sister group, as certain key features are not preserved. Possible ingroup affinities may lie with the syncarid lineage (due to the short head shield) or decapod lineage (due to anterior thoracopods being shorter than posterior ones). Representatives of the eumalacostracan lineage are rare in the Devonian and are in most cases younger than H. engeli. Only Archangeliphausia spinosa is slightly older. The specimen of H. engeli is preserved associated with small spherical structures that could represent eggs. We discuss the possibility that H. engeli might have performed a type of parental care.

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“…From the discussion above it is clear that several lineages of decapod crustaceans independently invaded freshwater habitats, including dendrobranchiatans 126 , carideans, axiideans, astacideans, 410 anomurans and brachyurans 6,19,105,127 . The enigmatic Tealliocaris Peach, 1908 128 , considered by some authors as a decapod crustaceans 129 (but see also 130 ), might represent yet another freshwater lineage. And among carideans, at least palaeomonoid, atyoid and alpheoid shrimps independently invaded freshwater environments 95 .…”

Section: Iv3 Multiple Invasions Into Freshwater Habitatsmentioning

confidence: 99%

The oldest freshwater crabs: claws on dinosaur bones

Robin

Bakel

Hyžný

et al. 2019

Preprint

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35With approximately 1,500 extant species, freshwater crabs (Decapoda: Brachyura) are among the most diverse decapod crustaceans. Nevertheless, their fossil record is extremely limited:only Potamidae, Potamonautidae and Trichodactylidae are reported up to the Eocene of the Neotropics so far. This work documents unusually large decapod claws from the Upper 40 Cretaceous (Campanian) continental deposits of Velaux and vicinity (southern France), in close association with large vertebrate remains. In addition to (1) the systematic assignment of these claws, the study addresses (2) the salinity trends in the deposit environment from its faunal assemblage and the elementary chemical patterns of fossils, and (3) the likely scenario for their auto/allochtony in the Velaux fluvial system. These claws belong to a new taxon, Dinocarcinus 45 velauciensis n. gen. n. sp., referred to as Portunoidea sensu lato, a group of "true" crabs nowadays linked to marine systems. However, the faunal assemblage, the claw taphonomy and the carbonates Y/Ho signatures support their ancient freshwater/terrestrial ecology, making them the oldest reported continental brachyurans and extending the presence of crabs in freshwater environments by 40 Ma. Either as primary or as secondary freshwater crabs, the 50 occurrence of these portunoids in Velaux is an evidence for the independent colonizations of continental environments by multiple brachyuran clades over time, as early as the Campanian. 55 60 65

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The Proof is in the Pouch:Tealliocarisis a Peracarid

Cited by 16 publications

References 40 publications

Fossil Calibrations for the Arthropod Tree of Life

Fossil Calibrations for the Arthropod Tree of Life

A crustacean with eumalacostracan affinities from the Early Devonian Hunsrück Slate (SW Germany)

The oldest freshwater crabs: claws on dinosaur bones

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