Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

84Maggenti and Gardnerlecting tubules of the excretory system of Ascaris.arcade cells (NEMATA) The nine anteriormost cells that are believedto form the lips, two opposite each esophageal lumenradius and one opposite each sector.archaeocytes n.pl. [Gr. arche, beginning; kytos, container] 1.(PORIF) Large, wandering amoebocytes with multiplephagosomes in the mesenchyme; nurse cells; trophocytes.2. A totipotent amoeboid cell.archaestomatous a. [Gr. arche, beginning; stoma, mouth](ANN) Describing a group, Archaeostomata of former classifications,with a mouth derived directly from the blastoporeof the embryo.archebiosis n. [Gr. arche, beginning; biosis, manner of life]Abiogenesis.archecentric a. [Gr. arche, beginning; kentron, center] Designatingor pertaining to an original type. see apocentric.archedictyon n. [Gr. arche, beginning; diktyon, net] (ARTHRO:Insecta) The irregular network of cuticular ridges on thewings of many fossils.archegenesis n. [Gr. arche, beginning; genesis, beginning]Abiogenesis.archencephalon see archicerebrumarchenteric pouch One of the paired, segmented, dorsoventralprominances of the archenteron from which the mesodermderives.archenteron n. [Gr. arche, beginning; enteron, intestine] Theprimitive digestive cavity of many invertebrates, formed bygastrulation; the gastrocoele; precursor to the gut.archeocyte see archaeocytesarchetype, architype n. [Gr. arche, beginning; typos, type] Ahypothetical ancestral type arrived at by the elimination ofspecialized characters of known later forms. see phylogeny.Archiacanthocephala n. [Gr. arche, beginning; akantha,thorn; kephale, head] A class of Acanthocephala that areparasites of predacious birds and mammals; insects andmyriapods are the intermediate hosts.