Paired appendages on the rear-most segments of many arthropods
Not to be confused with circus.
Earwig with large cerci (top)
Cerci (sg.: cercus) are paired appendages usually on the rear-most segments of many arthropods, including insects and symphylans. Many forms of cerci serve as sensory organs, but some serve as pinching weapons or as organs of copulation.[1] In many insects, they simply may be functionless vestigial structures.
In basal arthropods, such as silverfish, the cerci originate from the eleventh abdominal segment. As segment eleven is reduced or absent in the majority of arthropods, in such cases, the cerci emerge from the tenth abdominal segment.[2] It is not clear that other structures so named are homologous. In the Symphyla they are associated with spinnerets.[1]
^ abTiegs, O. W. (1 March 1945). "Memoirs: The Post-Embryonic Development of Hanseniella Agilis (Symphyla)". Journal of Cell Science. s2-85 (338): 191–328. doi:10.1242/jcs.s2-85.338.191.
^"CERCI AND TERMINAL FILAMENT". Entomological Glossary. University of Minnesota. Archived from the original on 25 February 2012. Retrieved 3 June 2014.
Cerci (sg.: cercus) are paired appendages usually on the rear-most segments of many arthropods, including insects and symphylans. Many forms of cerci serve...
Adult males are polymorphic in body weight and head width, as well as cercus length and width. The males have large, heavy, curved forceps that are very...
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possess this many antennal flagellomeres as well as an elongate, slender cercus. Another species of Leptoconops discovered in the same piece of amber, Leptoconops...
is known generally as the "toothcercus shortwing grasshopper" or "broad cercus scrub grasshopper". It is endemic to scrub and sandhill communities in Highlands...
The name Anisolabis stems from the asymmetry of the male cerci; the right cercus being more acute than the left. The Dermaptera Species File lists: species...
large-sized sciapodines mostly with a strongly sinuate m-cu and simple digitiform cercus. The strongly sinuate m-cu is considered to be a distinctive group autapomorphy...
and S. (A.) orientalis, as all have an area of very long setae on the cercus as well as small setae on the surstylar apodeme and the membrane between...
completely harmless to humans. Dragonflies sometimes are observed where the Cercus at the end of their abdomen are mistaken for claws or a stinger, however...
of males being close together, and those of females farther apart. The cercus of the male is longer than that of the female. Chrysomya megacephala has...
endoaedeagal process which is usually quite long and distinct. Females have the cercus always flattened. Larval Tabanomorpha have a retractable head capsule and...
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from Latin ‘dentata’, meaning ‘dentate’, referring to the dentate male cercus. In male specimens, the body length is 7.1–7.9 millimeters. The wings are...
opposite direction. The sensory neurons in the paired caudal cerci (singular: cercus) at the rear of the animal send a message along the ventral nerve cord....
acting Lieutenant Governor 15 June 1923 to 29 July 1924 Louis Nicolas Marie Cercus, acting Lieutenant Governor 29 July 1924 to 19 June 1931 Marie Joseph Jules...
antenna, while the fragments in OMNH 73364 are thought to be part of a cercus. In acleistorhinids, the marginal teeth, which are small and recurved, are...
found only on the Atlantic Coastal Ridge in Palm Beach County. The broad cercus scrub grasshopper is primarily found in Florida scrub, but also occurs in...
social reformer Keeleri Kunhikannan (1858-1939) martial art gurukkal and cercus experter S. K. Pottekkatt (1913-1982) an Malayalam literature Mithavaadi...
elongated and each bears a terminal segment that looks like a stylus or cercus. The antennae are fairly short, typically filiform or moniliform, with eleven...
postero-ventral sternite IX is strongly asymmetrical; tergite IX is elongated and the cercus is narrow. The basal flagellomere is oval and the scutellum is semicircular...
closely related fly species, including Z. inermis (puparial shape =2.62), Z. cercus (puparial shape =2.40), and Z. burlai (puparial shape = 2.29). Similarly...
meaning ‘short-haired’, referring to the unusually short pile on the male cercus. Like other species in its genus, S. (A.) brevipilus is small, slender,...
of the stripe down its mid dorsal thorax, and medial orientation of the cercus lobe. Additionally, the forewing contains four quadrangular cells and the...
sternites VII and VIII black. The surstyli are slightly asymmetrical, the cercus is enlarged, and the superior lobes are symmetrical. No female specimens...
225–249. Retrieved 8 July 2015. Evenhuis, Neal L. (2019). "Everyone loves a cercus: the endemic Hawaiian genus Uropachys Parent (Diptera: Dolichopodidae),...
pulchellum is positioned at a less acute angle to the sinuate sinus of the cercus in O. pulchellum when compared to that of O. nigripes.: 24–25 In females...
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