Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 553ing as pincers to pull out female vulvae.mesomeron n. [Gr. mesos, middle; meros, thigh] (ARTHRO:Insecta) In Diptera, the meron of the mesothorax behindthe midcoxa below the mesepimeron. see metameron,meron.meson n. [Gr. mesos, middle] The central plane; the midline ofthe body; an imaginary plane dividing the body into rightand left halves; the saggital plane.mesonephridium n. [Gr. mesos, middle; nephros, kidney]Nephridium of mesodermal origin.mesonotum n. [Gr. mesos, middle; notos, back] (ARTHRO: Insecta)The back or upper side of the mesothorax.mesopelagic a. [Gr. mesos, middle; pelagos, sea] Pertainingto the pelagic zone of intermediate depth of 200-1000 m;between the epipelagic and bathypelagic zones.mesopeltidium see schizopeltidmesophragma n. [Gr. mesos, middle; phragma, fence] (AR-THRO: Insecta) A chitinous piece that descends into the interiorof an insect body with the postscutellum as the base.mesoplankton n. [Gr. mesos, middle; plankton, wandering]Floating life below euphotic zone; plankton organisms retainedby a plankton net.mesoplax n. [Gr. mesos, middle; plax, plate] (MOLL: Bivalvia)A calcareous transverse plate straddling the two valves ontheir dorsal margins. see protoplax, metaplax.mesopleural bristles (ARTHRO: Insecta) In Diptera, a row ofbristles on the posterior margin of the mesopleura.mesopleural fovea (ARTHRO: Insecta) In Hymenoptera Ichneumonidae,a pit or short horizontal groove on the mesopleurum,anterior to the mesopleural suture and below thespeculum.mesopleural ridge (ARTHRO: Insecta) In Diptera, the pleuralridge marked externally by the mesopleural suture, betweenpleural apophyseal pit above the midcoxal articulationto the base of the wing.mesopleural sulcus (ARTHRO: Insecta) In Diptera, passingdownwards from the wing base to the middle coxa.