Dasyleptus
| Dasyleptus Temporal range: | |
|---|---|
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| Dasyleptus sp. fossil | |
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| Life reconstruction of D. brongniarti | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Insecta |
| Order: | Archaeognatha |
| Suborder: | †Monura Sharov, 1957 |
| Family: | †Dasyleptidae Sharov, 1957 |
| Genus: | †Dasyleptus Brongniart, 1885 |
| Species | |
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See text | |
| Synonyms | |
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Lepidodasypus Durden, 1978 | |
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Dasyleptus is an extinct genus of wingless insects, and the only member of the family Dasyleptidae and order or suborder Monura. They resembled juveniles of their modern relatives and had a single lengthy filament projecting from the end of the abdomen. They also had a pair of leg-like cerci and some non-ambulatory abdominal appendages. The largest specimens reached 30 millimetres (1.2 in) or more, not counting the length of the filament.[2] Dasyleptus species are mostly known only from the Late Carboniferous and Permian, but one species recorded from the Middle Triassic indicates that they survived the Permian–Triassic extinction event.[3] Dasyleptus and Monura are now typically treated as members of the living order Archaeognatha,[4][5] though this placement was questioned in a 2026 study, which found it to be a stem-group insect and the most primitive insect known.[6]
Taxonomy
[edit]The genus includes the following species:[4][1]
- Dasyleptus artinskianus Engel, 2009 – Early Permian (Artinskian), Wellington Formation, Kansas, United States
- Dasyleptus brongniarti Sharov, 1957 – Middle Permian (Roadian), Mitina Formation, Kuznetsk Basin, Russia
- Dasyleptus lucasi Brongniart, 1885 (type species) – Late Carboniferous (Gzhelian), Commentry Shales, France
- Dasyleptus noli Rasnitsyn, 2000 – Late Carboniferous (Gzhelian), Commentry Shales, France
- Dasyleptus rowlandi Rasnitsyn in Rasnitsyn et al., 2004 – Early Permian (Asselian), Bursum Formation, New Mexico, United States
- Dasyleptus sharovi (Durden, 1978) – Early Permian (Artinskian), Wellington Formation, United States
- Dasyleptus sinensis Liu et al., 2021[7] – Late Permian/Early Triassic, Kayitou Formation, China
- Dasyleptus triassicus Bechly & Stockar, 2011 – Middle Triassic (Ladinian), Meride Limestone, Monte San Giorgio, Switzerland
Phylogeny
[edit]Position of Dasyleptus after Tihelka et al. 2026, placing it outside of the Archaeognatha and crown insects as a whole.[6]
| Labiocarida | |
See also
[edit]- Tonganoxichnus, a trace fossil attributed to Monura
References
[edit]- 1 2 Zhang, Weiting; Li, Hu; Shih, Chungkun; Zhang, Aibing; Ren, Dong (August 2018). "Phylogenetic analyses with four new Cretaceous bristletails reveal inter-relationships of Archaeognatha and Gondwana origin of Meinertellidae". Cladistics. 34 (4): 384–406. doi:10.1111/cla.12212. PMID 34649368. S2CID 90962396.
- ↑ Hoell, H.V.; Doyen, J.T. & Purcell, A.H. (1998). Introduction to Insect Biology and Diversity (2nd ed.). Oxford University Press. p. 321. ISBN 0-19-510033-6.
- ↑ Prokop, Jakub; Nel, André; Engel, Michael S. (2023). "Diversity, Form, and Postembryonic Development of Paleozoic Insects". Annual Review of Entomology. 68 (1): 401–429. doi:10.1146/annurev-ento-120220-022637.
- 1 2 Bechly, G.; Stockar, R. (2011). "The first Mesozoic record of the extinct apterygote insect genus Dasyleptus (Insecta: Archaeognatha: Monura: Dasyleptidae) from the Triassic of Monte San Giorgio (Switzerland)" (PDF). Palaeodiversity. 4: 23–37.
- ↑ "Suborder †Monura Sharov 1957". The Paleobiology Database. Retrieved 26 November 2020.
- 1 2 Tihelka, Erik; Vásquez, Carlos; Engel, Michael S.; Schram, Frederick R.; Lozano-Fernandez, Jesus; Cai, Chenyang (2026-08-26). "Amphibious stem-insect sheds light on colonization of land". Nature. doi:10.1038/s41586-026-10961-2. ISSN 0028-0836.
- ↑ Gui-Chun Liu; Hua Zhang; Chen-Yang Cai; Ai-Hua Yuan; Yu-Qing Zheng; Di-Ying Huang (2019). "The bristletail genus Dasyleptus (Insecta: Archaeognatha: Dasyleptidae) from the Upper Permian-Lower Triassic Kayitou Formation of SouthWestern China". Historical Biology: An International Journal of Paleobiology. 33 (8): 1292–1296. doi:10.1080/08912963.2019.1692342. S2CID 213642030.