Additional Collections Examined. NEW ZEALAND. North Island. AUCKLAND: Waitemata City, Waitakere Ranges, Huia, on Nectria pseudotrichia, Dingley, 7 Feb 1954 (PDD 18210, NY); Waitakere Ranges, Waitakere Dam, on Nectria pseudotrichia, Dingley (6651), 9 Feb 1966 (PDD 25002, NY).

Anamorph. None known.
Mycelium not evident. Perithecia cespitose in groups of several, superficial, nonstromatic but difficult to remove from the substrate; pyriform, 150-250 x (115-)125-170(-220) µm, with an acute papilla, smooth, collapsing by lateral pinching when dry; yellow-orange, not changing color in 3% KOH. Cells at the surface ofthe perithecial wall forming textura epidermoidea, walls unevenly thickened, lumina of adjacent cells joined by fine pores. Perithecial wall ca. 20 µm wide, comprising a single region of small, indistinct cells; papilla formed of a palisade of hyphal elements that become progressively narrower and more thin-walled toward the ostiolar canal and there merging with the periphyses. Asci clavate, (62-)68-83(-90) x (10-)11.7-14.7(-16) µm , apex simple; 8-spored, ascospores biserate, completely filling each ascus. Ascospores ellipsoidal to fusiform, (12-)13.7-17.2 (-21) x (5-)5.7-7(-8) µm, equally 2-celled, not constricted at the septum, pronouncedly spinulose, pale brown.

Known Distribution. New Zealand (North Island).

Habitat. On perithecia of Nectria pseudotrichia Berk. & Curt.

Nectriopsis perpusillae (Mont.) Samuels similis, sed ascosporis majoribus, (12-)13.7-17.2 (-21) x (5-)5.7-7(-8) µm. Status anamorphicus ignotis. Holotypus. New Zealand (PDD 7509).

Etymology of the Specific Epithet. Refers to the hyperparasitic habit.

Holotype. New Zealand. North Island. Auckland: Waitemata City, Waitakere Ranges, off Anawhata Rd., on Nectria pseudotrichia on Dysoxylum spectabile (Forst. f.) Hook. f., Dingley, Apr 1948 (PDD 7509; isotype NY).