Strigeid metacercariae with both fore- and hind-bodies well developed and distinctly set apart by a constriction; no lateral sucking-cups; fore-body leaf-like; hold-fast organ well developed; reserve bladder highly developed, the smaller branches of which are usually anastomoses; calcareous granules mostly free in the circum-ambient fluid; encysted.
Sources: Hughes, R.C. 1927. Studies of the Trematode Family Strigeidae (Holostomidae) No. VI. A New Metacercaria Neascus Ambloplitis, sp. nov. Representing a New Larval Group. Transactions of the American Microscopical Society, Vol. 46, No. 4, p. 248-267.