A tergum (plural terga, associated adjective tergal) is the dorsal portion of an arthropod segment other than the head. The anterior edge is called the "base" and posterior edge is called the "apex" or "margin". A given tergum may be divided into several plates, called tergites. (Lateral extension of the dorsal aspect of a tergite are called "paranota".) So, for example, in a thoracic segment, the tergum may be divided into an anterior notum and a posterior scutellum.

In crustaceans, it is known as a pleuron when it overhangs the insertion of the limb on each side as a free plate.

The ventral portion of a segment is called the sternum.

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  • tergum — TÉRGUM s.n. (zool.) Porţiunea dorsală din cuticulă a fiecărui segment al corpului artropodelor. [< lat. tergum – spate]. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • Tergum — Ter gum, n.; pl. {Terga}. [L., the back.] (Zo[ o]l.) (a) The back of an animal. (b) The dorsal piece of a somite of an articulate animal. (c) One of the dorsal plates of the operculum of a cirriped. [1913 Webster] …   The Collaborative International Dictionary of English

  • TERGUM — an quia in in eo supini terra iacemus, an quia onere crebro teritur, Graece νῶτον est, de qua corporis humani parte diximus aliquid, in voce Catomidiare, item in Catemo, Dorsum, alibique. Paucis addo, tergô et capite etiam antiquissimis Romae… …   Hofmann J. Lexicon universale

  • tergum — [tʉr′gəm] n. pl. terga [tʉr′gə] [L, the back, prob. akin to Gr terphos, back skin, shell, hide < IE base * (s)ter , stiff > START] the longitudinal, dorsal surface of a body segment of most arthropods …   English World dictionary

  • tergum — Arched dorsal part of abdominal somites [Poore, 2004]. Arched dorsal part of each of the anterior five abdominal somites (Fig. 1). (Pl. terga) [Perez Farfante and Kensley, 1997]. Dorsal part of exoskeleton comprising tergites of all body somites… …   Crustacea glossary

  • Tergum — Der Ausdruck Notum (von griechisch noton: Rücken) bezeichnet bei Insekten den vorderen sklerotisierten (verhärteten) Teil des Tergum. Die Nota der drei Segmente des Thorax heißen von vorn nach hinten Pronotum (Vorderbrust), Mesonotum… …   Deutsch Wikipedia

  • tergum — n.; pl. terga [L. tergum, back] (ARTHROPODA) The dorsal surface of any body segment …   Dictionary of invertebrate zoology

  • tergum — (tèr gom ) s. f. Terme d entomologie. Dos de chacun des trois segments du thorax des insectes. ÉTYMOLOGIE    Lat. tergum, dos …   Dictionnaire de la Langue Française d'Émile Littré

  • Tergum — Ter|gum das; s, ...gi <aus lat. tergum »Rücken«> Rückenschild, der ↑dorsale Teil bei Insekten (Zool.) …   Das große Fremdwörterbuch

  • tergum — noun (plural terga) Etymology: New Latin, from Latin, back Date: circa 1826 the dorsal part or plate of a segment of an arthropod • tergal adjective …   New Collegiate Dictionary

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