Dasyleptus · Lablypedia

In a nutshell

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. 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. Dasyleptus and Monura are now typically treated as members of the living order Archaeognatha, though this placement was questioned in a 2026 study, which found it to be a stem-group insect and the most primitive insect known.

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Taxonomy

The genus includes the following species:

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 – Late Permian/Early Triassic, Kayitou Formation, China
Dasyleptus triassicus Bechly & Stockar, 2011 – Middle Triassic (Ladinian), Meride Limestone, Monte San Giorgio, Switzerland

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Monotypic taxonTaxonomic group with only one subordinate taxon Species descriptionFormal description of a discovered species ParaphylyType of taxonomic group IUCN Red ListInventory of the global conservation status of biological species SubtropicsGeographic and climate zone Common nameName generally used for a taxon, group of taxa or organism(s)

Taxonomy

Phylogeny

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