# Dasyleptus

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"Monura" redirects here. For a synonym of a genus of rotifers, see [Colurella](/source/Colurella).

***Dasyleptus*** is an extinct genus of wingless insects in the order [Archaeognatha](/source/Archaeognatha), and the only member of the family **Dasyleptidae**. They resembled juveniles of their modern relatives and had a single lengthy filament projecting from the end of the [abdomen](/source/Abdomen). They also had a pair of leg-like [cerci](/source/Cercus) and some non-ambulatory abdominal appendages. The largest specimens reached 30 millimetres (1.2 in) or more, not counting the length of the filament.[1] *Dasyleptus* species are mostly known only from the [Late Carboniferous](/source/Late_Carboniferous) and [Permian](/source/Permian), but one species recorded from the [Middle Triassic](/source/Middle_Triassic) indicates that they survived the [Permian–Triassic extinction event](/source/Permian%E2%80%93Triassic_extinction_event).[2] *Dasyleptus* was formerly placed in its own extinct order, **Monura**, but is this is now treated as a suborder of Archaeognatha.[3][4]

## Species

The genus includes the following species:[3][5]

- *Dasyleptus artinskianus* Engel, 2009 – Early Permian ([Artinskian](/source/Artinskian)), [Wellington Formation](/source/Wellington_Formation), Kansas, United States
- *Dasyleptus brongniarti* Sharov, 1957 – Middle Permian ([Roadian](/source/Roadian)), [Mitina Formation](/source/Mitina_Formation), [Kuznetsk Basin](/source/Kuznetsk_Basin), Russia
- *Dasyleptus lucasi* Brongniart, 1885 (type species) – Late Carboniferous ([Gzhelian](/source/Gzhelian)), [Commentry Shales](/source/Commentry_Shales), France
- *Dasyleptus noli* Rasnitsyn, 2000 – Late Carboniferous (Gzhelian), Commentry Shales, France
- *Dasyleptus rowlandi* Rasnitsyn in Rasnitsyn *et al.*, 2004 – Early Permian ([Asselian](/source/Asselian)), [Bursum Formation](/source/Bursum_Formation), New Mexico, United States
- *Dasyleptus sharovi* (Durden, 1978) – Early Permian (Artinskian), Wellington Formation, United States
- *Dasyleptus sinensis* Liu *et al.*, 2021[6] – Late Permian/Early Triassic, [Kayitou Formation](/source/Kayitou_Formation), China
- *Dasyleptus triassicus* Bechly & Stockar, 2011 – Middle Triassic ([Ladinian](/source/Ladinian)), [Meride Limestone](/source/Meride_Limestone), [Monte San Giorgio](/source/Monte_San_Giorgio), Switzerland

## See also

- *[Tonganoxichnus](/source/Tonganoxichnus)*, a trace fossil attributed to Monura

## References

1. 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.

1. 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](https://doi.org/10.1146/annurev-ento-120220-022637)

1. 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)"](https://bechly.lima-city.de/Palaeodiversity_4_BechlyStockar.pdf). *Palaeodiversity*. **4**: 23–37.

1. ["Suborder †Monura Sharov 1957"](https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=193852&is_real_user=1). [The Paleobiology Database](/source/The_Paleobiology_Database). Retrieved 26 November 2020.

1. 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](https://doi.org/10.1111/cla.12212). [PMID 34649368](https://pubmed.ncbi.nlm.nih.gov/34649368). [S2CID 90962396](https://api.semanticscholar.org/CorpusID:90962396)

1. 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](https://doi.org/10.1080/08912963.2019.1692342). [S2CID 213642030](https://api.semanticscholar.org/CorpusID:213642030)

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