A new fossil talitrid amphipod from the lower early Miocene Chiapas amber documented with microCT scanning

Hegna, Thomas A.; Lazo-Wasem, Eric A.; Serrano-Sánchez, María de Lourdes; Barragán, Ricardo; Vega, Francisco J.

doi:10.1016/j.jsames.2019.102462

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…Putative sister groups for the isopods do not appear in the record until later. The oldest Amphipoda seems to be known from the Triassic (200–250 mya, see McMenamin et al, 2013 ) while a review of the amphipod fossil record is given by Hegna et al ( 2019 ) discussing amphipods first appearing as fossils in the Eocene. Another possible sister group, Tanaidacea, does have one Paleozoic fossil and a more frequent fossil record from the Jurassic on (Schädel et al, 2019 ; Vonk & Schram, 2007 ).…”

Section: Discussionmentioning

confidence: 99%

Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)

et al. 2021

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In the deep sea, the phylogeny and biogeography of only a few taxa have been well studied. Although more than 200 species in 32 genera have been described for the asellote isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 from all ocean basins, their phylogenetic relationships are not completely understood. There is little doubt about the close relationship of these families, but the taxonomic position of a number of genera is so far unknown. Based on a combined morphological phylogeny using the Hennigian method with a dataset of 107 described species and a molecular phylogeny based on three markers (COI, 16S, and 18S) with 75 species (most new to science), we could separate Desmosomatidae and Nannoniscidae as separate families. However, we could not support the concept of the subfamilies Eugerdellatinae Hessler, 1970 and Desmosomatinae Hessler, 1970. Most genera of both families were well supported, but several genera appear as para- or even polyphyletic. Within both families, convergent evolution and analogies caused difficulty in defining apomorphies for phylogenetic reconstructions and this is reflected in the results of the concatenated molecular tree. There is no biogeographic pattern in the distribution as the genera occur over the entire Atlantic and Pacific Ocean, showing no specific phylogeographical pattern. Poor resolution at deep desmosomatid nodes may reflect the long evolutionary history of the family and rapid evolutionary radiations.

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Section: Discussionmentioning

confidence: 99%

Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)

et al. 2021

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“…The amber-bearing strata in Totolapa have been correlated with the latter two formations so we assume here a similar age (ca. 23-15 Ma) for Totolapa amber (e.g., Perrilliat et al, 2010;Durán-Ruiz et al, 2013;Riquelme and Menéndez-Acuña, 2017;Hegna et al, 2020). The piece was bought to the Ramirez family by M. David Coty (France) in 2007, after collection on their property and offered for study to the authors in March 2023.…”

Section: Methodsmentioning

confidence: 99%

Thaumatodryinus (Hymenoptera: Dryinidae) in time: A new record from the Miocene of southwestern Mexico

Brazidec

Perrichot

2023

Journal of South American Earth Sciences

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Arthropoda as Proxies of Paleoenvironmental Conditions

Guerrero-Arenas,

Vega

2024

Springer Geology

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A new fossil talitrid amphipod from the lower early Miocene Chiapas amber documented with microCT scanning

Cited by 7 publications

References 34 publications

Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)

Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)

Thaumatodryinus (Hymenoptera: Dryinidae) in time: A new record from the Miocene of southwestern Mexico

Arthropoda as Proxies of Paleoenvironmental Conditions

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