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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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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 85archibenthic a. [Gr. arche, beginning; benthos, depths <strong>of</strong> sea]Refers to the continental deep-sea zone, extending fromthe edge <strong>of</strong> the continental shelf (200-400 m.) to depths <strong>of</strong>about 800-1100 m. see abyssal.archicephalon n. [Gr. arche, beginning; kephale, head] Theprimitive annelid-arthropod head; the prostomium.archicerebrum n.; pl. -bra [Gr. arche, beginning; L. cerebrum,brain] 1. (ANN) The ganglionic nerve mass <strong>of</strong> aprostomium. 2. (ARTHRO) The primitive suprastomodealnerve mass <strong>of</strong> a prostomium; the primitive brain.archidictyon see archedictyonarchigastrula n. [Gr. arche, beginning; gaster, stomach] Atype <strong>of</strong> gastrula in which the endoderm is produced by invagination;emboly.archigenesis see abiogenesisarchinephridium n. [Gr. arche, beginning; nephros, kidney]An excretory organ <strong>of</strong> many invertebrate larvae; a solenocyte.archiplasm n. [Gr. arche, beginning; plasma, formed ormolded] A former name for the substance <strong>of</strong> the spindle fibersand astral rays; was thought to exist during the entirecell cycle, but to only become visible after aggregation atmitosis.Archiptera see Pseudoneuropteraarchitomy n. [Gr. arche, beginning; tome, cut] (ANN) Designatingreproduction by fission, with regeneration afterseparation <strong>of</strong> heads and/or tails. see paratomy.architype see archetypearchoophorans n.pl. [Gr. arche, beginning; pherein, to carry](PLATY: Turbellaria) 1. Individuals with modified cleavage inwhich yolk is stored in the oocytes; entolecithal eggs. seeneophorans. 2. Archoophora A former division <strong>of</strong> theTubellaria; a superorder.arciform a. [L. arcus, bow; forma, shape] Being arcuate;shaped like a bow or arch.arctic a. [Gr. arktos, bear] 1. Pertaining to the region <strong>of</strong> theNorth Pole within the Arctic Circle. 2. Pertaining to the high

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