Cortinarius violaceovolvatus (E. Horak) Peintner & M.M. Moser 2002

Caption:

Details

Name scientific

Cortinarius violaceovolvatus (E. Horak) Peintner & M.M. Moser in Peintner et al., Mycotaxon 81 182 (2002)

Preferred name

Cortinarius violaceovolvatus (E. Horak) Peintner & M.M. Moser 2002

Biostatus

Origin

Occurrence

Georegion

Schema

Biostatus source

Comment

Endemic

Present

New Zealand

Political Region

Anon

Nomenclature

Combination authors

Peintner & M.M. Moser

Original authors

E. Horak

Authors

(E. Horak) Peintner & M.M. Moser

Publication place

Peintner, U.; Moser, M.M.; Vilgalys, R. 2002: Thaxterogaster is a taxonomic synonym of Cortinarius: new combinations and new names. Mycotaxon 81: 177-184.

Year published

2002

Publication page

182

Nomenclatural code

ICN

Basionym

Thaxterogaster violaceovolvatus E. Horak 1973

Taxonomic rank

species

Canonical form

Cortinarius violaceovolvatus

Classification

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Agaricales

Family

Cortinariaceae

Genus

Cortinarius

Species

violaceovolvatus

Subordinates

Synonyms

Thaxterogaster violaceovolvatus E. Horak 1973

Associations

View full associations record

Association type

Associated organism

Association source

has host

Nothofagus solandri var. cliffortioides (Hook.f.) Poole

McKenzie, E.H.C.; Buchanan, P.K.; Johnston, P.R. (2000)

has host

Leptospermum

PDD (1 records from [Not available].)

has host

Nothofagaceae

PDD (10 records from [Not available].)

has host

Nothofagus

PDD (4 records from [Not available].)

has host

Nothofagus menziesii (Hook.f.) Oerst.

PDD (4 records from [Not available].)

has host

Nothofagus solandri (Hook.f.) Oerst.

PDD (1 records from [Not available].)

Descriptions

Horak, E. 1973: Fungi Agaricini Novazelandiae I-V. Beihefte zur Nova Hedwigia. 43.

Thaxterogaster violaceovolvatus E. Horak 1973

Collections Examined

Holotype (PDD 27061); Isotype (Herb. HK. ZT 68/382): 'Track to St. Arnaud Range., Lake Rotoiti, Prov. Nelson, N.Z.; leg. Horak, 5 V.1968'.

Description

Gastrocarp 15-30 x 8-20 mm, globose or ovoid when young, becoming depressed at the centre, margin of the peridium appressed to the stipe but in the end partially exposing the gleba, at the centre red-brown or chestnut brown, towards the margin lilac or violaceous (like Phlegmacium dibaphum), colours fading on over-mature carpophores, glutinous, smooth, margin without veil remnants. Gleba loculate, chambers irregularly arranged, up to 2 mm diam., rust brown, exposed in aged specimens but always covered with white or lilac fibrils. Stipe 10-20 x 7-10 µm, cylindric, attenuated towards the apex (columella), and extending above into the cuticular layer of the peridium, white or lilac, longitudinally covered with white or lilac fibrils, glutinous and membranaceous ring or volva present, initially ring or volva continuous with the gelatinous cuticle of the peridium. Context white, not gelatinised. Odor unpleasant, like acetylene. Taste mild. Chemical reactions on peridium: KOH and HCl- negative.
Spores 11-14 x 7-8.5 µm, ovoid or elliptic-oblong, mostly axially symmetric, verrucose, warts coarser towards the apex, ferruginous, germ pore absent. Basidia 30-40 x 8 µm, 4-spored. Cystidia absent. Epicutis consisting of a thick layer of strongly gelatinised, hyaline hyphae (2-6 µm diam.), with a thin-walled membrane, clamp connections numerous.

Habitat

On ground under Nothofagus cliffortioides, N. menziesii and N. fusca. New Zealand.

Latin

Gastrocarpio 15-30 x 8-20 mm ex hemisphaerico ovoideo, demum centro depresso, marginem versus involuto, violaceo-lilacino, apicaliter castaneo, glutinoso, glabro. Gleba lacunosa, ferruginea fibrillis albido-violaceis obtecta. Stipite (columella) 10-20 x 7-10 mm, percurrente, cylindraceo, apicaliter attenuato, ex albido lilacino, annulo violaceo vel volva concolori, glutinosa membranaceaque instructo, Odore ingrato. Spore nullo. Sporis 11-14 x 7-8.5 µm, ovoideis vel ellipticis, verrucosis, ferrugineis. Basidiis 4-sporigeris. Cystidiis nullis. Epicute ex hyphis gelatinosis cutem formatibus, septis fibuligeris. Ad terram in silvis nothofagineis. Novazelandia.

Notes

Th. violaceovolvatum Hk. is suggestive of three other species of Thaxterogaster (Th. glutinopallens Hk., Th. lubricum Moser, Th. gliocyclum Hk.) occurring in the Nothofagus forests of South America. The distinct red-brown and lilac colours, however, serve to separate clearly the New Zealand species from their relatives in Patagonia. With respect to the microscopical characters all four species also show close relationships.

Typification

Holotypus (PDD 27061): 'St. Arnaud Range., Lake Rotoiti, N.Z.; leg Horak, 5.V.1968'.