Mesopeltidium see schizopeltid

mesophragma n. [Gr. mesos, middle; phragma, fence] (ARTHRO: Insecta) A chitinous piece that descends into the interior of an insect body with the postscutellum as the base.

mesoplankton n. [Gr. mesos, middle; plankton, wandering] Floating life below euphotic zone; plankton organisms retained by a plankton net.

mesoplax n. [Gr. mesos, middle; plax, plate] (MOLL: Bivalvia) A calcareous transverse plate straddling the two valves on their dorsal margins. see protoplax, metaplax.

mesopleural bristles (ARTHRO: Insecta) In Diptera, a row of bristles on the posterior margin of the mesopleura.

mesopleural fovea (ARTHRO: Insecta) In Hymenoptera Ich-neumonidae, a pit or short horizontal groove on the meso-pleurum, anterior to the mesopleural suture and below the speculum.

mesopleural ridge (ARTHRO: Insecta) In Diptera, the pleural ridge marked externally by the mesopleural suture, between pleural apophyseal pit above the midcoxal articulation to the base of the wing.

mesopleural sulcus (ARTHRO: Insecta) In Diptera, passing downwards from the wing base to the middle coxa.

mesopleural suture (ARTHRO: Insecta) The external groove of the mesopleural ridge, between the base of the wing to the midcoxal articulation.

mesopleuron n.; pl. -ra [Gr. mesos, middle; pleuron, side] (ARTHRO: Insecta) 1. The pleuron of the mesothorax; in winged insects, composed of basalare, subalare, mesepis-ternum, mesepimeron and mesotrochantin. 2. In Diptera, the dorsal part of the mesepisternum; area in front of the root of the wing between the noto- and sternopleural sutures.

mesopleurosternal ridge (ARTHRO: Insecta) In Diptera, a large, posteriorly curved invagination of the mesopleuros-ternal suture.

mesopleurosternal suture (ARTHRO: Insecta) In Diptera, the external groove between the meskatepisternum and the mesobasisternum, or mesosternum when the mesobasis-ternum is not distinguishable; the pleurosternal suture.

mesopleurum n. [Gr. mesos, middle; pleuron, side] (ARTHRO: Insecta) In Hymenoptera Ichneumonidae, the mesepister-num.

mesopostnotum n. [Gr. mesos, middle; L. post, after; Gr. notos, back] (ARTHRO: Insecta) The postnotum of the mesothorax. see metapostnotum.

mesopostscutellum n. [Gr. mesos, middle; L. post, after; scutellum, small shield] (ARTHRO: Insecta) The postscutel-lum of an insect's mesothorax.

mesopraescutum n. [Gr. mesos, middle; L. prae, before; scutum, shield] (ARTHRO: Insecta) The praescutum of the mesothorax. see prescutum.

mesopsammic a. [Gr. mesos, middle; psammos, sand] Pertaining to organisms living interstitially in sand or a material in the form of rounded grains; psammous. mesop-sammon n. see sabulous.

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