Monura

Definition

A formerly recognized extinct order of wingless insects, now treated as the suborder Monura within Archaeognatha. Members, represented by the genus Dasyleptus and family Dasyleptidae, were superficially similar to modern bristletails but possessed distinctive features including a single long terminal filament, leg-like cerci, and non-ambulatory abdominal appendages. They ranged from the Late Carboniferous through the Permian, with at least one lineage surviving into the Middle Triassic.

Etymology

From Greek monos (single, alone) + oura (tail), referring to the single caudal filament characteristic of these insects.

Example

Dasyleptus, the sole genus of the family Dasyleptidae, was long classified in its own order Monura until morphological studies demonstrated its placement within Archaeognatha as a suborder.

Synonyms

• Dasyleptida (obsolete order name)

Related Terms

• Archaeognatha
• bristletail
• Dasyleptus
• cercus
• filum terminale
• Apterygote
• Paleozoic insects

Usage Notes

Historical usage: Monura was established as a distinct order to accommodate fossil bristletail-like insects with a single terminal filament (versus the three filaments of modern Archaeognatha). Current taxonomy treats Monura as a suborder, making it paraphyletic or potentially synonymous with Archaeognatha depending on phylogenetic interpretation. The term appears primarily in paleoentomological and systematic literature. Not to be confused with the unrelated genus Monura in Lepidoptera or Collembola.