Chresmodidae
| Chresmodidae Temporal range: [1]
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| File:Chresmodidae - Chresmoda obscura.JPG | |
| Fossil specimen of Chresmoda obscura from Germany, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
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| Family: | Chresmodidae Haase 1890
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Chresmodidae is an extinct family of Mesozoic insects within the superorder Polyneoptera.[2][3][4]
Genera
[edit | edit source]- Chresmoda Late Jurassic-Cenomanian, Worldwide
- Jurachresmoda Zhang, Ren & Shih, 2008 Middle Jurassic, Jiulongshan Formation[5]
- Sinochresmoda Zhang, Ren & Pang, 2008 Early Cretaceous, Yixian Formation[6]
Prochresmoda from the Triassic of Kyrgyzstan is not currently considered part of the group and is considered to be more closely related to Triassophasma and Palaeochresmoda.[7]
Their affinities within the Polyneoptera have long been considered uncertain.[8] Some authors have suggested that they represent a derived group of cockroaches.[9]
Description
[edit | edit source]Chresmodidae are large enigmatic insects with very long specialized legs, probably adapted for skating on the water surface, similar to extant water skaters. They can reach a size of about 17 centimetres (6.7 in).[10][11] and even 19 centimetres (7.5 in).[12]
These Polyneoptera of uncertain position have been considered aquatic, living on the water surface, probably predaceous on nektonic small animals.[13][14]
They lived during the Cretaceous of Brazil, China, Lebanon, Spain, United Kingdom, as well as in the Jurassic of Germany and China, from ~166.0 to 94.3 Ma.[1]
References
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- ^ Delclos X, Nel A, Azar D, Bechly G, Dunlop JA, Engel MS, Heads SW The enigmatic Mesozoic insect taxon Chresmodidae (Polyneoptera): New palaeobiological and phylogenetic data, with the description of a new species from the Lower Cretaceous of Brazil
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- ^ A. G. Ponomarenko Fossil insects from the Tithonian «Solnhofener Plattenkalke» in the Museum of Natural History, Vienna
- ^ A. Nel, D. Azar, X. Martinez-Delclos and E. Makhoul A new Upper Cretaceous species of Chresmoda from Lebanon - a latest representative of Chresmodidae (Insecta: Polyneoptera inc. sed.): first record of homeotic mutations in the fossil record of insects
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