Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

536Maggenti and Gardnerto posteroventral angle of the shell delimiting the posteriorarea in Trigoniacea.marginal veins (ARTHRO: Insecta) A vein running along thefront margin of a wing that gives off a stigmal vein.marginate a. [L. margo, border] Having a distinct margin inappearance or structure.marine a. [L. mare, sea] Pertaining to or inhabiting the sea,ocean, or other salt waters.marita n. [L. maritus, conjugal] (PLATY: Trematoda) A sexuallymature fluke.marker gene Genetic marker; gene of known position andconspicuous in its action.marmorate a. [L. marmor, marble] Having color or veined likemarble.marsh n. [A.S. mersc, marsh] An area of wet soil.marsupium n. [L. marsupium, bag] 1. Brood pouch. 2. (AR-THRO: Crustacea) The oostegite in Peracarida, or broodchamber or pouch in others. 3. (ARTHRO: Insecta) In marsupialcoccids, a waxen ovisac, longer than the body, filledwith eggs that hatch while the insect is still mobile. 4.(BRYO) The ovicell. 5. (CNID: Hydrozoa) In some, the internalpouch borne by the blastostyle. 6. (ECHINOD) a. Insome, the cardiac stomach. b. In Viviparous Crinoidea, presenton the base of the pinnules adjacent to the gonad andhaving an external opening; a brood chamber.mask n. [Ar. maskhara, buffoon] (ARTHRO: Insecta) In dragonflynymphs, the prehensile labium that conceals the othermouthparts. masked a.masked pupa see pupa larvatamass communication (ARTHRO: Insecta) In Hymenoptera,transfer of information among large groups of individualswhich cannot be accounted for by one to one communication.mass provisioning (ARTHRO: Insecta) Social behavior of solitarybees and wasps by storing cells with sufficient food tosatisfy their developing offspring and closing them downbefore the eggs hatch. see progressive provisioning.