Y.-M. Ju

The genus Stilbohypoxylon

Stilbohypoxylon is resurrected. The type species, S. moelleri , is redescribed and S. samuelsii is described as new. The third species, S. quisquiliarum , represents a new combination. A key to these taxa is provided.

Xylaria moelleroclavus sp. nov. and its Moelleroclavus anamorphic state.

Moelleroclavus is considered to be an anamorphic genus. The teleomorph of M. penicilliopsis is shown through field observations, collection examination, and cultures to represent a previously unnamed species of Xylaria, X. moelleroclavus sp. nov. Xylaria lingua and X. scruposa are also discussed.

Biscogniauxia anceps comb. nov. and Vivantia guadalupensis gen. et sp. nov

Biscogniauxia anceps infrequently produces the ascospore type expected of such fungi, namely an unequally bicelled spore with a large dark-walled cell and a smaller hyaline appendage cell. The predominant ascospore type features two unequal hyaline cells. Both hyaline cells germinate readily. Vivantia guadalupensis produces bicelled ascospores that remain permanently hyaline. Both fungi produce Nodulisporium anamorphs in culture. The implications of these findings in regard to taxonomic concepts in the Xylariaceae are discussed.

Discoxylaria myrmecophila and its Hypocreodendron anamorph

Discoxylaria is shown to be a distinctive ge? nus of family Xylariaceae (Ascomycetes, Pyrenomy? cetes, Sphaeriales). Its Hypocreodendron anamorph is hyphomycetous rather than coelomycetous as origi- nally reported. Conidia are produced holoblastically; the conidiogenous locus proliferates by a variation of the percurrent mode.

PAREUTYPELLA GEN. NOV. FOR TWO LONG-OSTIOLATE PYRENOMYCETES FROM TAIWAN

Pareutypella is described as a new genus with two species P. sulcata and P. nematoceras. They have elongated ostioles, allantoid ascospores, sessile asci that detach at maturity from the ascogenous system, and hyphomycetous anamorphs with holoblastic conidi? ogenesis. The taxonomic affinities of these fungi are discussed.

Anthostomella formosa var. abietis var. nov. and notes on Apiorhynchostoma

Anthostomella formosa var. abietis var. nov. is described from Abies foliage in Oregon. Anthostomella brachystoma is considered to be a synonym of Apiorhyn- chostoma tumulatum. The taxonomic affinities of Apio- rhynchostoma are discussed.

Neohypodiscus nom. nov. for Hypodiscus

Neohypodiscus is erected to replace Hypodis- cus Lloyd, a later homonym. Neohypodiscus rickii, the type species, N. irradians, and N. cerebrinus are ac- cepted. Features of the genus include brown one- to three-celled ascospores with hyaline polar caps and sometimes with a pore in one end; asci with a distinct, but nonamyloid apical ring; and massive stromata with a hard exterior layer and fibrous or woody interior. No anamorph is known. The taxonomic position of Neohypodiscus is unsettled, but it is presently placed in the Amphisphaeriaceae sensu lato.