Dasyleptus
Extinct genus of insects
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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]
| 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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Species
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
See also
- Tonganoxichnus, a trace fossil attributed to Monura