Agaricus subantarcticus Geml, Laursen & D. Lee Taylor 2007
Details
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor in Geml et al., Mycotaxon 100 204 (2007)
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor 2007
Nomenclature
Geml, Laursen & D. Lee Taylor
Geml, Laursen & D. Lee Taylor
2007
204
ICN
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor 2007
Campbell I., NZ (holotype PDD 92094) - MB 510667
species
Agaricus subantarcticus
Classification
Descriptions
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor 2007
Pileus 40-130 mm diam, convex to plano-convex, surface yellow white (4A2) to cream or chamois (4A3, 4B4, 4C5) at first, later topaz or honey yellow (5C5, 5D6, 5E7). Disc and fibrillose squamules cream to grayish tan at first, later reddish brown (5D5, 5E6), margin with veil remnants. Lamellae 4-15 mm broad, pinkish to orange brown and pale grayish brown (5B2,5C3,5D4) at first, later dark brown (5E4,5E5,5F6), free, crowded, unequal in length, brittle. Stipe 40-90 mm long, 8-20 mm thick, white or dull yellow, base bulbous (25-35 mm thick), smooth, context hollow, white, turning yellow. Odor and taste: almond. Partial veil white forming an inferior, membrane-like, annulus, evanescent in age. Chemical reactions: pileus context and surface yellowing in 5% KOH; Schaeffer reaction positive. Microscopical characteristics: Basidiospores short to medium-elliptical, yellow to reddish-brown; wall smooth, thick, entire, apiculate, chocolate brown to purple brown in deposit, one- or two-guttulate, exhibit great variation in size within specimen, (4-) 7-9 (-9.5) x (4-)4.5-5.5 um, mean and standard deviation are: 7.89±1.11 x 4.83±0.38; Q=1.69 ± 0.15. Basidia: mostly 4-spored, 8.8 x 17.6 um, clavate. subhymenium of irregular, swollen, inamyloid cells. Pileipellis of interwoven, inamyloid, cylindrical hyphae, terminal cells cylindrical to slightly swollen tipped. Pileus context of interwoven, inamyloid, cylindrical hyphae. Lamellar trama of parallel to interwoven, inamyloid hyphae. Habitat — On litter, under Dracophyllum scoparium and D. longifolium in the subalpine zone of subantarctic islands.
Taxonomic concepts
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor 2007
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor (2007)
Agaricus subantarcticus Geml, Laursen & D. Lee Taylor 2007
Global name resources
Notes
taxonomic status
Phylogenetically similar to A. horakianus
typification
NEW ZEALAND. CAMPBELL ISLAND: PERSEVERENCE HARBOUR, TUCKER COVE (S520 33.1', E169° 9.3') holotype PDD 92094 [not present in PDD March 2024], isotype GAL9419 , 9 March 2000, coll. G. A. Laursen and H. H. Burdsall
Metadata
9d2ec7c3-2712-490e-a83d-eb986d0636ab
scientific name
Names_Fungi
4 July 2007
19 October 2022