Metapeltidium see schizopeltid

metaphase n. [Gr. meta, after; phasis, to appear] The stage of mitosis when the chromosomes line up in the equatorial plane of the spindle.

metaplasis n. [Gr. meta, after; plasis, molding] The mature period in an individuals life.

metaplasm n. [Gr. meta, after; plasma, formed or molded] Non-living protoplasmic inclusions. metaplastic a.

metaplax n. [Gr. meta, after; plax, plate] (MOLL: Bivalvia) A long narrow posteriorly pointed, rounded or forked accessory plate covering the gape between the two valves on the dorsal margins posterior to the umbo. see protoplax, mesoplax.

metapleural bristles (ARTHRO: Insecta) In Diptera, a bristle or bristles on the metapleura.

metapleural gland (ARTHRO: Insecta) In most Formicidae, a gland with an external bulla and a small orifice, opening on each side of the metathorax at its lower posterior corners; thought to function as a protection against microorganisms in the nest chamber due to fungistatic and bacteriostatic activity.

metapleuron n.; pl. -ura [Gr. meta, after; pleuron, side] (ARTHRO: Insecta) 1. The lateral sclerites of the metathorax. 2. In Diptera, the pleuron of the metathorax. metapleural a.

metapleurum n. [Gr. meta, after; pleuron, side] (ARTHRO: Insecta) In Hymenoptera Ichneumonidae, ordinarily divided into two parts, the lower is largest and generally referred to; the lower part an oval or subtriangular area on the side of the thorax, between middle and hind coxae to the pro-podeum; the upper area lies behind the upper half of the mesepimeron and below and behind the base of the hind wing, separated from the propodeum by a suture.

metapneustic a. [Gr. meta, after; pneustikos, of breathing] (ARTHRO: Insecta) Said of aquatic insect larvae having only the posterior pair of spiracles open and functioning. see oligopneustic.

metapodeon n. [Gr. meta, after; podeon, neck] (ARTHRO: Insecta) That part of an abdomen behind the podeon or petiole.

metapodium n. [Gr. meta, after; pous, foot] (MOLL) The posterior portion of the foot.

metapodosoma n. [Gr. meta, after; pous, foot; soma, body] (ARTHRO: Chelicerata) In ticks or mites, that portion of the podosoma that bears the third and fourth pair of legs.

metapolar cells (MESO) The posterior tier of cells in the calotte.

metapon n. [Gr. metopon, forehead] (ARTHRO: Crustacea) In Decapoda, the entire preoral area, including part of the mandibular somite.

metapostnotum n. [Gr. meta, after; L. post, after; Gr. notos, back] (ARTHRO: Insecta) The postnotum of the metathorax.

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