An earwig in Late Cretaceous Vendean amber (Dermaptera)

Engel, Michael S.; Perrichot, Vincent

doi:10.17161/pc.1808.15984

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The fossil record of earwigs extends to the Mesozoic (Grimaldi and Engel, 2005;Tihelka, 2019), in particular the Triassic (Kelly et al,2017), the Jurassic (Vishniakova, 1980;Zhang, 1994Zhang, , 2002Ross, 2010;Zhao et al,2010;Ren et al,2019), the Cretaceous (Haas, 2007;Engel et al, 2011;Engel, 2009Engel, , 2011Grimaldi, 2004, 2014;Engel and Perrichot, 2014;Engel et al,2015;Mao et al,2020), the Eocene (Burr, 1911;Nel et al,2003), the Oligocene (Nel et al,1994) and the amber of the Miocene of Mexico and the Dominican Republic (Ross and Engel, 2013;Ross et al,2016;Engel, 2019).…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

BSGM

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New Dermaptera taxa (one new genus and four new species) are reported from amber pieces proceeding from Mina Los Pocitos near Simojovel de Allende, Chiapas. The amber pieces were collected in the lower Miocene Mazantic Shale, including well-preserved earwigs, with only one antecedent for this insect group in the Mexican amber. The presence of this kind of insects supports the paleoenvironmental interpretation for the Mazantic Shale amber as of a humid forest.

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Section: Introductionmentioning

confidence: 99%

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2023

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“…Of these 22 taxa, six are classified in the family Pygidicranidae, including four adults and two nymphs. Although the record of earwigs preserved in Cretaceous and Cenozoic amber has grown rapidly (e.g., Engel 2009Engel , 2011Engel , 2016Engel , 2017Perrichot et al 2011;Ross and Engel 2013;Engel and Perrichot 2014;Engel and Grimaldi 2014;Engel et al 2011Engel et al , 2015Engel et al , 2017Engel et al 2017Ren et al 2017Ren et al , 2018, well-preserved specimens of adult earwigs are still rather uncommon and it remains a difficulty to associate nymphs with adults when not found as syninclusions. Moreover, the precise phylogenetic placement of many fossil earwigs continues to be poorly understood.…”

Section: Introductionmentioning

confidence: 99%

A new species of Astreptolabis in mid-Cretaceous amber from northern Myanmar, with the discovery of the first male of Astreptolabidinae (Dermaptera)

Mao

Engel

Ren

2020

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A new species of one of the basal families among extant Dermaptera, Pygidicranidae, is described from mid-Cretaceous amber of Myanmar based on two females and a male. Astreptolabis laevissp. nov., belongs to the extinct subfamily Astreptolabidinae, sharing the diagnostic combination of features typical of this group, such as the well-developed compound eyes, large pronotum, and straight and tubular cerci. The discovery of a male with its genitalia partly exerted permits characterization of traits for the subfamily and provides further information on the uniqueness and affinities of the subfamily. In addition, the extended hind wing allows for a comparison between the folding mechanism between these fossils and their modern counterparts, demonstrating considerable conservatism in hind wing evolution among Dermaptera.

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Convergent evolution and convergent loss in the grasping structures of immature earwigs and aphidlion-like larvae as demonstrated by about 100-million-year-old fossils

Haug,

Kiesmüller

et al. 2023

Swiss J Palaeontol

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Convergent evolution is a common phenomenon, independently leading to similar morphologies in different evolutionary lineages. Often similar functional demands drive convergent evolution. One example is the independent evolution of grasping structures in different lineages of Euarthropoda, though the exact morphology of these grasping structures varies significantly. In this study, we investigated grasping apparatuses with two movable counteracting structures as well as some related structures, exemplified by the stylets (compound structures of mouthparts) of aphidlion-like larvae (part of Neuroptera or lacewings) and the cerci of immature earwigs (Dermaptera). For the stylets of aphidlion-like larvae, studies have pointed to a significant loss in morphological diversity in the last 100 million years. We used quantitative morphology to evaluate if a similar process has also occurred in the cerci of earwigs. The cerci of extant immature earwigs exhibit two distinct types of morphologies in the modern fauna: elongated cerci divided into several ringlets with a feeler-type function, and pincer-like stout cerci. In some fossil immature earwigs, however, the cerci are generally elongated but undivided and roughly occupy the morphospace between those of the two modern cerci types; hence this fossil cerci morphology appears to have been lost. To some extent, a comparable loss is also found in certain lacewing larvae. Outgroup comparisons suggest that the morphologies no longer present today are in fact not ancestral, but instead specialised, hence their loss is possibly resulting from disruptive evolution in earwigs as well as lacewings. We discuss the possible functions of these specialised grasping structures.

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An earwig in Late Cretaceous Vendean amber (Dermaptera)

Cited by 5 publications

References 12 publications

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A new species of Astreptolabis in mid-Cretaceous amber from northern Myanmar, with the discovery of the first male of Astreptolabidinae (Dermaptera)

Convergent evolution and convergent loss in the grasping structures of immature earwigs and aphidlion-like larvae as demonstrated by about 100-million-year-old fossils

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