Family Arcuospathidiidae nov. fam.

Abstract

Diagnosis: Spathidiina with temporary cytostome and somatic ciliary rows anteriorly curved dorsally on both sides of cell and distinctly separate from circumoral kinety. Brush located dorsally, dorsolaterally, or on left side. Extrusomes restricted to oral bulge or in both oral bulge and somatic cortex. Oral bulge usually as long as or longer than widest trunk region, cuneate to very elongate elliptical; ventral end of circummoral Kinety closed.