astomate
From ZooTerms (Dictionary of Invertebrate Zoology)
astomate (adjective; Greek a, without; stoma, mouth): 1. Lacking a mouth.
2. (Annelida: Oligochaeta) In earthworms, a closed nephridium, without a nephrostome.
3. (NEMATA) Referring to a stoma lacking the cheilostome, but retaining an unexpanded esophastome.
