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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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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 429Changes in the relative time <strong>of</strong> appearance and rate <strong>of</strong> developmentfor characters already present in ancestors.heterochronic a.heteroclite n. [Gr. heteros, differrent; clitos, hill] (MOLL: Bivalvia)A folded or twisted commissural plane.heterocotylus see hectocotylusheterodactyl a. [Gr. heteros, different; daktylos, finger] (AR-THRO: Chelicerata) Having claws, apoteles or ungues differingfrom each other. heterodactyly n. see homodactylheterodont a. [Gr. heteros, different; odous, tooth] Having avariety <strong>of</strong> tooth types.heterodynamic a. [Gr. heteros, different; dynamis, power]Genes not simultaneously influencing the same developmentalprocess.heterodynamic life cycle 1. A life cycle in which there is aperiod <strong>of</strong> dormancy. 2. A life cycle that includes a rest periodnot caused by environmental conditions. see homodynamiclife cycle.heteroecious, heteroicous a. [Gr. heteros, different; oikos,house] Parasitic upon two unlike hosts, either by successivegenerations or in a single life history. see metoeciousparasite; heteroxenous.heterogamete see anisogametesheterogametic a. [Gr. heteros, different; gamete, spouse]Pertains to the sexual form that gives rise to two differenttypes <strong>of</strong> sexual gametes in meiosis; in xy and xo systemsthis is usually male; digametic. see homogametic.heterogamy n. [Gr. heteros, different; gamos, marriage] 1.Alternation <strong>of</strong> bisexual with parthenogenetic reproduction.2. The preference <strong>of</strong> an individual to mate with an unlikephenotype or genotype. see homogamy. 3. see anisogamy.heterogeneous a. [Gr. heteros, different; genos, kind] Possessingdifferent characteristics. see homogeneous.heterogenesis n. [Gr. heteros, different; genesis, descent]Form <strong>of</strong> reproduction that has sexual and asexual orparthenogenetic forms; alternation <strong>of</strong> generations; xeno-

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