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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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148Maggenti and Gardnerstructure. b. In Lepidoptera, the distal part. c. In Diptera, amuscled, syringe-like structure.bulla n.; pl. bullae [L. bulla, bubble] 1. A rounded prominance,blister- or knob-like. 2. (ARTHRO: Crustacea) Astructure secreted by the head and maxillary glands <strong>of</strong>certain parasitic female copepods that serves as an anchorfor attachment to gill filaments <strong>of</strong> fish. 3. (ARTHRO: Insecta)a. Weakened spots on concave wings that allows them tobend. see stigma. b. In diaspid Hemiptera, located in theterminal outlet <strong>of</strong> wax glands (ceratuba) at the inner end.c. In scarabaeoid Coleoptera, a sclerite that closes the trachea.4. (NEMATA: Secernentea) In Heteroderidae, knoblikestructures within the vulval cone <strong>of</strong> cysts near the underbridgeor fenestra.bullate a. [L. bulla, bubble] Having a blister-like appearance,inflated, swollen.bulliform a. [L. bulla, bubble; forma, shape] Bubble-shaped.bundle n. [A.S. byndele, a binding] 1. A band or group fastenedtogether. 2. A group <strong>of</strong> nerves, muscles or other fibers;a fasicle.burden n. [A.S. byrthen, load] The total number <strong>of</strong> infectiousparasites <strong>of</strong> an individual. see intensity.burrow n. [uncert. origin] A hole or excavation used as ashelter and habitation, or place <strong>of</strong> retreat. see fossorial.bursa n.; pl. bursae [L. bursa, purse] 1. Any pouch or sac, asac-like cavity. 2. A lateral cuticular extension adanal, orsurrounding the tail <strong>of</strong> male nematodes and acanthocephalansthat functions as claspers or guides duringcopulation; has also been applied by various workers to allcaudal alae. 3. (ECHINOD: Crinoidea) In Ophiurida, formedby infoldings <strong>of</strong> the body wall <strong>of</strong> the oral disc to either side<strong>of</strong> the base <strong>of</strong> each arm, functioning in gas exchange or asbursal slits. see bursa copulatrix.bursa copulatrix 1. A genital pouch <strong>of</strong> numerous invertebrates.2. In certain male nematodes and acanthocephalans,a modified caudal ala or alae, circular or oval, may bedivided into two lateral symmetrical or asymmetrical lobes,separated by a dorsal lobe, and supported by rays or pa-

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