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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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774Maggenti and Gardnerradiosensitive a. [L. radius, ray; sentire, to feel] Sensitive toradiation effects.radius n.; pl. radii [L. radius, ray] 1. In radially symmetricalanimals, the primary axis <strong>of</strong> symmetry. 2. (ECHINOD: Crinoidea)One <strong>of</strong> 5 reference planes passing through the polaror central axis and median line. 3. (ARTHRO) a. InCrustacea (sessile barnacles), the lateral part <strong>of</strong> a compartmentalplate when marked <strong>of</strong>f from the median triangulararea by change in direction <strong>of</strong> growth lines. b. In Insecta,the third longitudinal wing vein.radix n. [L. radix, root] 1. A primary source. 2. (ARTHRO: Chelicerata)In Arachnida, apophysis <strong>of</strong> male copulatory organ.3. (ECHINOD: Crinoidea) The rootlike distal anchorage <strong>of</strong>the stem; holdfast.radula n.; pl. radulae [L. radula, scrape] 1. (ARTHRO: Insecta)The raster. 2. (MOLL) A uniquely molluscan feeding rasplikeorgan, odontophore or lingual ribbon, armed with chitinousdenticles, found in nearly all mollusks, except clams.radula sac (MOLL) An evaginated pocket in the posterior wall<strong>of</strong> the buccal cavity containing on it's floor the radula. seeraster.radulifer n. [L. radula, scrape; fero, to bear] (BRACHIO) Ahook-shaped or rodlike crura on the ventral side <strong>of</strong> thehinge plate, projecting toward the pedicle valve.raft see egg-raftsrake see rastellumramal, rameal a. [L. ramus, branch] Branching or branch-like.ramate a. [L. ramus, branch] Branched.ramate mastax (ROTIF: Bdelloidea) A stout mastax, with reducedfulcrum and manubria.ramellose a. [L. dim. ramus, branch] Having small branches.ramellus n. [L. dim. ramus, branch] (ARTHRO: Insecta) In Ichneumonoidea,the distal stump <strong>of</strong> the medial vein <strong>of</strong> thefore wings.ramet n. [L. ramus, branch] An individual clone member.rami pl. <strong>of</strong> ramus

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