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Machilidae

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Machilidae
Temporal range: Ladinian–Present
Pedetontus unimaculatus (female)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Archaeognatha
Family: Machilidae
Grassi, 1888

The Machilidae are a family of insects belonging to the order Archaeognatha (the bristletails). There are around 450 described species worldwide.[1] These insects are wingless, elongated and more or less cylindrical with a distinctive humped thorax and covered with tiny, close-fitting scales. The colour is usually grey or brown, sometimes intricately patterned. There are three "tails" at the rear of the abdomen: two cerci and a long central epiproct. They have large compound eyes, often meeting at a central point. They resemble the silverfish and the firebrat, which are from a different order, Zygentoma.

Machilids undergo virtually no metamorphosis during their life cycles, and both nymphs and adults are generally inconspicuous herbivores and scavengers. Many species are restricted to rocky shorelines, but some are found in well-vegetated habitats inland. They can move very fast and often escape by jumping considerable distances when disturbed.

Like all Archaeognatha, machilids transfer sperm indirectly from male to female. Some species can spin silken threads that lead the female to the spermatophore. Other species can produce silken stalks on which they place droplets of sperm.

There are no aquatic species, but some littoral forms, such as Parapetrobius and Petrobius, can swim.[2]

Their fossil records extends back into the Triassic with the genus Gigamachilis from the Middle Triassic of Italy and Switzerland, around 240 million years old.[3][4]

Genera

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Source:[5]

[edit]
  • Machilis species
    Machilis species
  • Machilidae species
    Machilidae species
  • Petrobius maritimus
    Petrobius maritimus
  • Petrobius brevistylis
    Petrobius brevistylis

References

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  1. ^ "Taxonomist's Nightmare … Evolutionist's Delight: An Integrative Approach Resolves Species Limits in Jumping Bristletails Despite Widespread Hybridization and Parthenogenesis". Retrieved 22 Feb 2024.
  2. ^ Insect Biodiversity: Science and Society, Volume 2
  3. ^ Montagna, Matteo; Haug, Joachim T.; Strada, Laura; Haug, Carolin; Felber, Markus; Tintori, Andrea (2017-04-07). "Central nervous system and muscular bundles preserved in a 240 million year old giant bristletail (Archaeognatha: Machilidae)". Scientific Reports. 7 (1): 46016. doi:10.1038/srep46016. ISSN 2045-2322. PMC 5384076. PMID 28387236.
  4. ^ Montagna, Matteo (April 2020). "Comment on Phylogenetic analyses with four new Cretaceous bristletails reveal inter‐relationships of Archaeognatha and Gondwana origin of Meinertellidae". Cladistics. 36 (2): 227–231. doi:10.1111/cla.12387. ISSN 0748-3007. PMID 34618953. S2CID 199633962.
  5. ^ "Machilidae". gbif.org. Retrieved 25 Jun 2014.


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