Earwig

Earwig Temporal range: 208–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Late Triassic to Recent
Female common earwig, Forficula auricularia
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Infraclass:	Neoptera
Cohort:	Polyneoptera
Order:	Dermaptera De Geer, 1773
Suborders
†Archidermaptera Pandermaptera †Eodermaptera Neodermaptera
Synonyms
Euplecoptera Euplexoptera Forficulida

Earwigs make up the insect order Dermaptera. With about 2,000 species^[1] in 12 families, they are one of the smaller insect orders. Earwigs have characteristic cerci, a pair of forcep-like pincers on their abdomen, and membranous wings folded underneath short, rarely used forewings, hence the scientific order name, "skin wings". Some groups are tiny parasites on mammals and lack the typical pincers. Earwigs are found on all continents except Antarctica.

Earwigs are mostly nocturnal and often hide in small, moist crevices during the day, and are active at night, feeding on a wide variety of insects and plants. Damage to foliage, flowers, and various crops is commonly blamed on earwigs, especially the common earwig Forficula auricularia.

Earwigs have five molts in the year before they become adults. Many earwig species display maternal care, which is uncommon among insects. Female earwigs may care for their eggs; the ones that do will continue to watch over nymphs until their second molt. As the nymphs molt, sexual dimorphism such as differences in pincer shapes begins to show.

Extant Dermaptera belong to the suborder Neodermaptera, which first appeared during the Cretaceous. Some earwig specimen fossils are placed with extinct suborders Archidermaptera or Eodermaptera, the former dating to the Late Triassic and the latter to the Middle Jurassic. Dermaptera belongs to the major grouping Polyneoptera, and are amongst the earliest diverging members of the group, alongside angel insects (Zoraptera), and stoneflies (Plecoptera), but the exact relationship among the three groups is uncertain.