1) Class 2) Class aphasmidia 
Synonym for Adenophorasida ... A class of nematodes lacking lateral canals opening into the excretory system and phasmids, with few or no caudal papillae, eggs unsegmented, and with polar plugs or hatching in utero. It includes the genera Trichuris, Capillaria, and Trichinella among important parasites of man and domestic animals. ... See: Secernen...
Type: Term Pronunciation: ā-faz-mid′ē-ă Synonyms: Adenophorasida
[n] - one of two subgroups of Nematoda used in some classification systems
class Aphasmidia noun one of two subgroups of Nematoda used in some classification systems