tectum n. [L. tectum, roof] 1. (ARTHRO: Chelicerata) In Acari, the blade-shaped prolongation of the exoskeleton to protect an organ or joint; epistome; cervix. 2. (ARTHRO: Crustacea) The central portion of the carina of barnacles.
teeth n. [A.S. toth, tooth] 1. Hardened growths on mandibles, maxillae or stomatal walls. 2. (CNID: Hydrozoa) Deep or very shallow indentations on the hydrothecal margins; peglike chitinous growths just inside the margins. 3. (MOLL: Polyplacophora) Portions of the articulamentum between the slits; may be pectinated or propped (outside edges thickened), sharp and smooth.
teges see seta tegillum n.; pl. -a [L. teges, mat] (ARTHRO: Insecta) In Scara-baeoidea larvae, a paired patch of hooked or straight setae on each side of the venter of the tenth abdominal segment beside paired palidia; part of the raster.
tegmen n.; pl. -mina [L. tegmen, cover] 1. A tegument or covering. 2. (ARTHRO: Insecta) a. In Coleoptera, a single or divided sclerite proximad of the penis (phallobase); may be divided into basal piece and parameres. see tegumen. b. In some Orthoptera, Dictyoptera and Homoptera, the hardened leathery fore wing. 3. (ECHINOD: Crinoidea) An oral wall covering the calyx cup.
tegmentum n. [L. tegere, to cover] (MOLL: Polyplacophora) The outer, sometimes softer and porous calcareous layer of the valve below the periostracum.
tegula n.; pl. -lae [L. tegula, roofing tile] (ARTHRO: Insecta) 1. A small convex, scalelike lobe overlying the base of the fore wing; paraptera. 2. In Diptera, small anterior sclerites located in an incision of the lateral region of the notum. 3. In Lepidoptera, well developed, and carried on a special tegular plate of the notum, supported by a tegular arm arising from the base of the pleural wing process.
tegular arms (ARTHRO: Insecta) Internal structures supporting the tegular plate.
tegular plate (ARTHRO: Insecta) In Lepidoptera, a notal structure bearing the tegulae of the fore wings.
tegulum n. [L. tegulum, roof] (ARTHRO: Chelicerata) In Acari, the dorsal region of the cheliceral frame extending from the cheliceral base to the rostrum.
tegumen n. [L. tegumen, cover] (ARTHRO: Insecta) 1. Tegmen. 2. (ARTHRO: Insecta) In male Lepidoptera, a dorsal roof or hoodlike structure of the genitalia.
tegument n. [L. tegumentum, covering] 1. Any natural outer covering. 2. (ACANTHO) The non-cellular body wall or cuticle. tegumentary a.
tegumentary glands (ARTHRO: Chelicerata) In Acari, specialized secretory glands, located in or immediately beneath the hypodermis.
tela n.; pl. -ae [L. tela, web] (brachio) One of a pair of points at the end of the beak ridges that project into and beyond the pedicle opening.
telaform larva (ARTHRO: Insecta) In certain heteromorphic Hymenoptera first instar larva, a sharp, tail-like caudal horn curved anteriorly, body constricted between a large anterior part (cephalothorax) and an elongated posterior part.
telamon n. [Gr. telamon, strap] 1. A supporting band. 2. (NEMATA: Secernentea) A thickening of the anterior cloacal wall in the order Strongylida, that acts as an accessory guiding structure for the spicules; sometimes erroneously applied in plant parasites to the gubernacular capitulum.
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