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Furca, a prehistoric arthropod; Furca (springtail), an anatomical structure in springtail entognaths. Caudal furca ("tail fork"), part of the telson of some crustaceans; Furcula, the wishbone of birds and some dinosaurs; Furcula a genus of Noctuid moths; Any small forked structure of animal anatomy
Religion portal; Image of Furcas from Collin de Plancy's Dictionnaire Infernal. In demonology, Furcas (also spelled Forcas) is a Knight of Hell (the rank of Knight is unique to him), and rules 20 legions of demons.
The furcula, or furca is a forked, tail-like appendage. It is present in most species of springtails , and in them it is attached ventrally to the fourth abdominal segment. The organ most often is present in species of Collembola that lives in the upper soil layers where it is used for jumping to avoid predators. [ 1 ]
Most species have an abdominal, tail-like appendage known as a furcula (or furca). It is located on the fourth abdominal segment of springtails and is folded beneath the body, held under tension by a small structure called the retinaculum (or tenaculum). When released, it snaps against the substrate, flinging the springtail into the air and ...
Forked cross Forked cross in St. Mary's in the Capitol, Cologne. A forked cross, is a Gothic cross in the form of the letter Y that is also known as a crucifixus dolorosus, furca, ypsilon cross, Y-cross, robber's cross or thief's cross.
Ceratium species belong to the group of dinoflagellates known as dinophysiales, meaning they contain armored plates. [2] They contain a pellicle, which is a shell, that is made from the cell membrane and vesicles; vesicles are composed of cross-linked cellulose , forming the plates. [ 2 ]
Furca is characterized by a broad head shield with three pairs of prominent spines: front (anterolateral), side (mediolateral) and rear (posterolateral). The head shield of Furca ranged from 21–31 mm (0.83–1.22 in) long and 18–29 mm (0.71–1.14 in) at maximum width. The mediolateral spines are long and strongly curved.
The origin of the word hourquette is unclear. French Wikipedia speculates the word is derived from a Gascon given name, via the Latin furca meaning 'fork'. [2] The word is very similar to the Spanish noun horqueta 'fork' and French noun fourchette 'fork', both of which have etymological roots in the same Latin word furca.