New Cretaceous crabs (Crustacea, Brachyura) from Moscow Oblast and Dagestan (Russia): patterns in phylogeny and morphospace of the oldest eubrachyurans (Dorippoidea)

Bakel, Barry W.M. van; Mychko, Eduard V.; Spiridonov, Andrej; Jagt, John W.M.; Fraaije, René H.B.

doi:10.1016/j.cretres.2020.104675

Cited by 12 publications

(43 citation statements)

References 38 publications

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“…The evolutionary history of the Dorippoidea has been documented by fossils since the Early Cretaceous, and this early occurrence had confirmed that they were, with the Majoidea, the earliest splitting brachyuran branches (Luque 2015; Guinot et al 2013, 2019; Charbonnier et al 2017; Guinot 2019; Vega et al 2019; Van Bakel et al 2020). Our view that Hymenosomatoidea is even more basal in Eubrachyura, with its relationship to Dorippoidea (Guinot 2011) apparently supported by consistent data sets, will be discussed in light of the recent discovery of even older hymenosomatoid fossil representatives, namely in the Barremian (Mendes et al 2022).…”

Section: Introductionmentioning

confidence: 90%

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

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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...

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Section: Introductionmentioning

confidence: 90%

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

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“…Bartethusa hepatica has an overall carapace outline, fronto-orbital construction, and dorsal carapace region configuration that matches the range of forms seen across crown dorippoids. While Bartethusa hepatica could be allied to either Ethusidae Guinot, 1977 (e.g., Quayle andCollins, 1981;Van Bakel et al, 2021) or Dorippidae MacLeay, 1838a (e.g., Luque, 2015b;Schweitzer et al, 2021b), in either case it will still be nested within the crown Dorippoidea MacLeay, 1838a.…”

Section: Phylogenetic Justificationmentioning

confidence: 99%

“…Dorippoid crabs-extant and fossil-are among the most puzzling of the eubrachyurans in terms of their phylogenetic affinities, given their unique combination of plesiomorphic and apomorphic characters and their relatively low representation in previous molecular phylogenies compared to most other crabs. Based on morphology alone, dorippoids have been typically regarded as some of the oldest crown eubrachyurans, and thus one of the earliest splitting branches in the eubrachyuran tree, with their earliest known representatives, e.g., Telamonocarcinidae Larghi, 2004, andpotentially Tepexicarcinidae Luque, 2015b, already present in the Early Cretaceous (Luque, 2015b;Luque et al, 2021;Van Bakel et al, 2021). Although their overall anatomy is strongly reminiscent of the array of body forms across modern dorippoids in terms of their dorsal carapaces, thoracic sternum, and shape and size of their pereopods (P2-P5), they cannot be assigned to any of the two crown families recognized today, i.e., Dorippidae and Ethusidae.…”

Section: Age Justificationmentioning

confidence: 99%

Fossil calibrations for molecular analyses and divergence time estimation for true crabs (Decapoda: Brachyura)

Luque

Bracken‐Grissom

Ortega‐Hernández

et al. 2023

Preprint

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True crabs, or Brachyura, comprise over 7,300 known species and are among the most ecologically dominant, economically significant, and popularly recognized group of extant crustaceans. There are over 3,000 fossil brachyuran species known from mid and upper Jurassic, Cretaceous, and Cenozoic deposits across the globe, many of preserved in exquisite detail, but the origins and early evolution of true crabs remain unresolved. This uncertainty hinders the identification of the stratigraphically earliest occurrence of major brachyuran groups in the fossil record, obscuring our understanding of their phylogenetic relationships and thus the ability to estimate divergence times to answer large scale macroevolutionary questions. Here, we present 36 vetted fossil node calibration points for molecular phylogenetic analysis of crabs (one Anomura and 35 Brachyura) and reassess the earliest occurrences of several key clades based on recent fossil discoveries or re-examination of previous studies. For each calibrated node, we provide the minimum and tip maximum ages for the stratigraphically oldest fossil that can be reliably assigned to the group. Disentangling the anatomical disparity of fossil forms and their phylogenetic relationships is crucial to recognize the earliest branching members among brachyuran groups. This represents a critical first step understanding the evolution of carcinization and decarcinization in true crabs, the appearance of key adaptations, and the transition from sea to land and freshwater. The identification of reliable fossils for deep time calibrations, both as tips and nodes, is pivotal to ensure not only precise but more accurate divergence time estimations when reconstructing the crab tree of life

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“…Molecular phylogenies indicate that heterotremes and thoracotremes diverged in the latest Jurassic-earliest Cretaceous (175 to 100 Ma) (8,9). However, the oldest unequivocal heterotremes, which are all marine, are from the latest Early Cretaceous (Aptian-Albian, ~115 to 110 Ma) [e.g., (7,15,(61)(62)(63)]. In contrast, the oldest unequivocal thoracotremes, which are also marine, are from the Eocene (~50 Ma) (Fig.…”

Section: Phylogenetic and Evolutionary Implications The Origins Of Eu...mentioning

confidence: 99%

Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous

et al. 2021

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New Cretaceous crabs (Crustacea, Brachyura) from Moscow Oblast and Dagestan (Russia): patterns in phylogeny and morphospace of the oldest eubrachyurans (Dorippoidea)

Cited by 12 publications

References 38 publications

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

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

Fossil calibrations for molecular analyses and divergence time estimation for true crabs (Decapoda: Brachyura)

Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous

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