Deciphering the exceptional preservation of the Early Triassic Paris Biota (Bear Lake County, Idaho, USA)

Iniesto, Miguel; Thomazo, Christophe; Fara, Emmanuel; Brayard, Arnaud; Bylund, Kevin G.; Escarguel, Gilles; Goudemand, Nicolas; Guériau, Pierre; Jenks, James F.; Krumenacker, L. J.; Olivier, Nicolas; Stephen, Daniel A.; Thoury, Mathieu; Vennin, Emmanuelle

doi:10.1016/j.geobios.2019.04.002

Cited by 11 publications

(3 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, most of the decapod specimens studied here are from Paris Canyon. Additionally, the Paris Canyon decapod specimens are slightly better preserved (i.e., more complete) than those from the other sites, and have the advantage of being preserved as calcium phosphate (Iniesto et al, 2019), which tends to react well under UV illumination, facilitating anatomical observations. The specimens from Georgetown are also preserved in calcium phosphate, whereas those from NoName, Stewart Canyon, and Immigrant Canyon are carbonaceous.…”

Section: Methodsmentioning

confidence: 99%

The Paris Biota decapod (Arthropoda) fauna and the diversity of Triassic decapods

Smith

Charbonnier²,

Jenks³

et al. 2022

J. Paleontol.

Self Cite

View full text Add to dashboard Cite

We describe here the early Spathian (Early Triassic) Paris Biota decapod fauna from the western USA basin. This fauna contains two taxa of Aegeridae (Dendobranchiata), namely Anisaeger longirostrus n. sp. and Aeger sp. that are the oldest known representatives of their family, thus extending its temporal range by 5 Myr back into the Early Triassic. This fauna also includes two representatives of Glypheida (Pleocyemata) with Litogaster turnbullensis and Pemphix krumenackeri n. sp., confirming for the former and extending for the latter the temporal ranges of their respective superfamilies back to the Early Triassic. Overall, the Paris Biota decapods are some of the oldest known representatives of Decapoda, filling in an important gap in the evolutionary history of this group, especially during the Triassic that marks the early diversification of this clade. Additionally, we compile and provide overviews for all known Triassic decapods, which leads to the revision of four species of Middle and Late Triassic Aegeridae, and to a revised family assignment of a Middle Triassic Glypheida. Based on this refined dataset, we also investigate decapod diversity throughout the Triassic. We show that the apparent increase in decapod taxonomic richness is probably driven by the heterogeneity of the fossil record and/or sampling effort, and that the decapod alpha diversity is actually relatively high as soon as the Early Triassic and remains rather stable throughout the Triassic. UUID: http://zoobank.org/0f435f27-1767-473d-955c-57fe869faa0f

show abstract

Section: Methodsmentioning

confidence: 99%

The Paris Biota decapod (Arthropoda) fauna and the diversity of Triassic decapods

Smith

Charbonnier²,

Jenks³

et al. 2022

J. Paleontol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The abundant, exceptional and delicate fossils of the Paris Biota occurring at distant sites also raise several other issues. First, although the taphonomic conditions allowing the preservation of many fragile organisms at these sites are not yet fully understood 50 , 51 , the recent discovery of these specimens in a rather intensively sampled basin strongly suggests marked sampling and/or taphonomic biases in the western United States. Until now, the vast majority of Early Triassic organisms sampled in this basin were heavily-calcified invertebrates (ammonoids, bivalves, gastropods, brachiopods 11 ) that are more easily preserved than fragile organisms such as the decapods, thylacocephalans and leptomitid sponges found in the Paris Biota.…”

Section: Significance In the Context Of The Early Triassic Recoverymentioning

confidence: 99%

Exceptional fossil assemblages confirm the existence of complex Early Triassic ecosystems during the early Spathian

Smith

Laville

Fara

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

The mass extinction characterizing the Permian/Triassic boundary (PTB; ~ 252 Ma) corresponds to a major faunal shift between the Palaeozoic and the Modern evolutionary fauna. The temporal, spatial, environmental, and ecological dynamics of the associated biotic recovery remain highly debated, partly due to the scarce, or poorly-known, Early Triassic fossil record. Recently, an exceptionally complex ecosystem dated from immediately after the Smithian/Spathian boundary (~ 3 myr after the PTB) was reported: the Paris Biota (Idaho, USA). However, the spatiotemporal representativeness of this unique assemblage remained questionable as it was hitherto only reported from a single site. Here we describe three new exceptionally diverse assemblages of the same age as the Paris Biota, and a fourth younger one. They are located in Idaho and Nevada, and are taxonomic subsets of the Paris Biota. We show that the latter covered a region-wide area and persisted at least partially throughout the Spathian. The presence of a well-established marine fauna such as the Paris Biota, as soon as the early Spathian, indicates that the post-PTB biotic recovery and the installation of complex ecosystems probably took place earlier than often assumed, at least at a regional scale.

show abstract

“…comm. ; see also Wolfe et al 2019) inferred that brachyurans most likely diverged in the Triassic (but see Iniesto et al 2019), with family-level splits in the Late Cretaceous and Early Paleogene, and stated that Eubrachyura could be as old as the mid-Jurassic (183-161 Ma), with the oldest event, encompassing the freshwater heterotreme groups Potamoidea Ortmann, 1896, Gecarcinucoidea Rathbun, 1904, and Pseudothelphusoidea Ortmann, 1893, occurring in the upper Cretaceous, with others in the Cenozoic (Davis et al 2022).…”

Section: Introductionmentioning

confidence: 99%

A new subfamily classification of the highly diversified Dorippidae H. Milne Edwards, 1837 (Crustacea, Decapoda, Brachyura, Dorippoidea), using morphological, molecular and palaeotonlogical data, with special emphasis on its unique female reproductive system

Guinot

2023

Zoosystema

View full text Add to dashboard Cite

A new and revised classification of the small family Dorippidae H. Milne Edwards, 1837, which previously comprised two distinct subfamilies (Dorippinae H. Milne Edwards, 1837 and Ethusinae Guinot, 1977), each of which was subsequently elevated to a familial rank supported by traditional data and genetic phylogenies, is presented on the basis of a morphological analysis involving a large number of characters. The family is in fact highly diverse, at all levels. Several features are described and depicted in detail here for the first time, e.g. the presence of a diversely developed strip along the protrudingly rimmed posterior margin of the carapace; on the dorsally exposed thoracic sternite 8, a process acting as an additional pleonal-retention mechanism in the females of three genera (Dorippe Weber, 1795; Philippidorippe Chen, 1986; Phyllodorippe Manning & Holthuis, 1981); a callosity at the base of the coxa of the third pereiopod, variously shaped, in two genera (Dorippe and Dorippoides Serène & Romimohtarto, 1969). The generic and specific taxonomy masterfully stabilised by Holthuis & Manning (1991) is undisputed and still valid, except for the composition of the genus Heikeopsis Ng, Guinot & Davie, 2008 that may well contain in northern China a form not entirely consistent with the typical Heikeopsis japonica (von Siebold, 1824) of Japan. A second exception concerns the genus Paradorippe Serène & Romimohtarto, 1969 sensu Holthuis & Manning (1991) that may not be monophyletic. The validity of Medorippe crosnieri Chen, 1988, questioned by Holthuis & Manning (1990), could not be confirmed here: its distinctive morphological characters from M. lanata (Linnaeus, 1767) suggest that it could be recognised one day. The synthesis of conventional and new characters allows the traditional taxonomic approach to be updated and modernised, more complete and robust diagnoses to be constructed, and groups of genera to be circumscribed. We propose a new subfamily classification whereby the family Dorippidae is recognised as monophyletic but with seven genera assigned to subfamily-level rank, leading to the recognition of seven distinct subfamilies: the Dorippinae H. Milne Edwards, 1837 n. stat. (Dorippe), Dorippoidinae n. subfam. (Dorippoides), Medorippinae n. subfam. (Medorippe Manning & Holthuis, 1981), Heikeopsinae n. subfam. (Heikeopsis, Neodorippe Serène & Romimohtarto, 1969, Nobilum Serène & Romimohtarto, 1969), Paradorippinae n. subfam. (Paradorippe), Philippidorippinae n. subfam. (Philippidorippe) and Phyllodorippinae n. subfam. (Phyllodorippe). There is a high degree of concordance between several elements of our proposal: 1) the main morphological patterns of the male gonopods lead to the recognition of seven subfamilies; 2) the main morphological patterns of the vulvae correspond to the seven observed gonopod types and lead to the recognition of the same seven subfamilies; 3) the recognition of several subfamilies is supported by the well-defined clades obtained by the molecular analyses; and 4) the female re...

show abstract

Deciphering the exceptional preservation of the Early Triassic Paris Biota (Bear Lake County, Idaho, USA)

Cited by 11 publications

References 80 publications

The Paris Biota decapod (Arthropoda) fauna and the diversity of Triassic decapods

The Paris Biota decapod (Arthropoda) fauna and the diversity of Triassic decapods

Exceptional fossil assemblages confirm the existence of complex Early Triassic ecosystems during the early Spathian

A new subfamily classification of the highly diversified Dorippidae H. Milne Edwards, 1837 (Crustacea, Decapoda, Brachyura, Dorippoidea), using morphological, molecular and palaeotonlogical data, with special emphasis on its unique female reproductive system

Contact Info

Product

Resources

About