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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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92Maggenti and Gardnercosolenia .asconoid grade (PORIF) A grade <strong>of</strong> construction in which thechoanocytes line thin, short tubes. see syconoid grade,leuconoid grade or type.ascopore n. [Gr. askos, bag; poros, channel] (BRYO: Gymnolaemata)In some Cheilostomata, a small opening in thefrontal wall connecting the ascus to the external environment.ascus n.; pl. asci [Gr. askos, bag] (BRYO: Gymnolaemata) Inascophoran cheilostomates, the exterior-walled, flexiblefloored,sac beneath the frontal shield <strong>of</strong> an autozooid. seeanascan.ascus sac (MOLL: Gastropoda) In Sacoglossa, a storage areafor the holder <strong>of</strong> outgrown teeth usually retained in a spiralor jumbled heap in the pharynx; ventral sac.asemic a. [Gr. asemos, without mark] Pertaining to beingwithout markings.aseptate a. [Gr. an, without; L. septum, partition] Pertainingto being without a septa.aseptic a. [Gr. an, without; sepsis, decay] Refers to being free<strong>of</strong> microorganisms, especially those causing decay, putrefaction,or poisoning.aseptic culture A maintained population <strong>of</strong> organisms containinga single species and free <strong>of</strong> contamination by allother organisms.asetal a. [Gr. an, without; L. seta, bristle] (ANN: Oligochaeta)Pertaining to being without setae; as in the peristomiumand pygomere <strong>of</strong> earthworms.asexual a. [Gr. an, without; sexus, sex] Not related to sex.asexual reproduction Any method <strong>of</strong> reproduction not involvingfertilization, as that by fission, fragmentation, sporeproduction, budding, vegetative reproduction, and gemmuleformation.asiphonate a. [Gr. an, without; siphon, tube] Lacking a siphon.aspect n. [L. aspicere, to look at] The general appearance, directionor view with respect to seasons, species or popula-

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