Boletus semigastroideus M. Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett 2013

Caption:

Details

Name scientific

Boletus semigastroideus M. Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett, Fungal Biology 117 493 (2013)

Preferred name

Boletus semigastroideus M. Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett 2013

Biostatus

Origin

Occurrence

Georegion

Schema

Biostatus source

Comment

Endemic

Present

New Zealand

Political Region

Nomenclature

Original authors

M. Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett

Authors

M. Nuhn, Manfr. Binder, A.F.S. Taylor, Halling & Hibbett

Publication place

Nuhn, M.E.; Binder, M.; Taylor, A.F.S.; Halling, R.E.; Hibbett, D.S. 2013: Phylogenetic overview of the Boletineae. Fungal Biology 117(7-8): 479-511.

Year published

2013

Publication page

493

Nomenclatural status

replacement, replacement name

non Boletus areolatus Berk. 1852

Nomenclatural code

ICN

Based on

Secotium areolatum G. Cunn. 1942

Taxonomic rank

species

Canonical form

Boletus semigastroideus

Classification

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Boletales

Family

Boletaceae

Genus

Boletus

Species

semigastroideus

Vernacular names

Language of use: English

Aero Pouch

Synonyms

Associations

View full associations record

Association type

Associated organism

Association source

has host

Kunzea

PDD (3 records from [Not available].)

has host

Kunzea ericoides (A.Rich.) Joy Thomps. 1983

PDD (10 records from [Not available].)

has host

Leptospermum

PDD (11 records from [Not available].)

has host

Leptospermum ericoides

PDD (6 records from [Not available].)

has host

Leptospermum scoparium J.R.Forst. & G.Forst.

PDD (5 records from [Not available].)

has host

Nothofagus

PDD (1 records from [Not available].)

is host of

Sepedonium chrysospermum (Bull.) Fr. 1832

PDD (3 records from [Not available].)

Descriptions

Cunningham, G.H. 1942: Two additional New Zealand Gasteromycetes. New Zealand Journal of Science and Technology, Series B:General Section 23: 172-173.

Secotium areolatum G. Cunn. 1942

Description

Peridium depressed globose or sub-turbinate, to 3 cm. tall, 4 cm: diameter, apex bluntly rounded, base abruptly truncated, slightly excavated ; exterior at first white, in dried plants ochraceous, smooth, slightly viscid, irregularly areolate, base finely pubescent and somewhat papillate ; composed of two layers, the outer about 100 µ thick, composed of septate hyphae partly gelatinized and arranged in a vertical palisade absent from the truncate base, the inner of hyaline pseudoparenchyma to 800 µ thick, firm and compact. Stem at first white, becoming greyish or ochraceous, to 2 cm. long, 1 cm. thick, tapering, smooth, dull, hollow, attenuated abruptly at the glebal margin to a narrowly cylindrical columella 2-3 mm. thick and white. Gleba closely oppressed to the columella, ferruginous, cells lenticular, to 1 mm. long; tramal plates 30-60 µ thick, pseudoparenchymatous ; basidia 4-spored. Spores ovate-elliptical or ovate-fusiform, 10-16 x 6-8 µ (occasionally attaining a length of 20 µ), irregular in size and shape, bluntly acuminate or rounded, base bluntly pointed, apiculate, epispore pallid ferruginous, smooth, 1 µ thick.

Latin

Peridium depressum globosum vel sub-turbinatum, ad 3 cm. altum, 4 cm. diam., spice habatatum rotundatum, basi truncatum, superficie album, siccitate ochraeeum, leve, irregulariter areolatum, hyphis 2-lamellatia. Hyphae lamellae eateriorae palum densum formantes, interiorse hyaline pseudoparenchymatae. Caulis albus, siccitate griseus, apicem versus regulariter angustatus, levis, cavus. Gleba cellularis, ferrugineus, cellulis ad 1 mm. longis, lenticulatus ; laminis tramarum pseudoparenchymatis. Sporae ovato-ellipticae vel ovato-fusiformes, 10-16 x 6-8 µ, episporium pallide ferrugineum, levae 1 µ crassum.

Notes

The species is separated from S. viresens and S. erythrocephalum principally by the peculiar structure, areolated appearance, and different colour of the peridium. It is composed of two layers, the outer being so constructed of hyphae arranged in a palisade that it ruptures readily, exposing the tough pseudoparenchymatous inner layer and giving to plants their areolated appearance. Spores resemble those of S. erythrocephalum in shape.

Typification

Distribution : Auckland, Swanson, Miss J. Dingley, type collection.

Horak, E. 1971: Contributions to the knowledge of the Agaricales s.l. (Fungi) of New Zealand. New Zealand Journal of Botany 9(3): 463-493.

Notholepiota areolata (G. Cunn.) E. Horak 1971

Collections Examined

HOLOTYPE: PDD 4595: "On ground; Swanson, Auckland, N.Z.: leg. J. M. Dingley, IV. 1943". — PDD 24935: "On ground under Leptospermum scoparium; Huia, Auckland, N.Z.', leg. R. F. R. McNabb, 19.1.1966".

Description

Only very few remarks can be added to the detailed original description of Secotium areolatum. The spores measure about 13-18 x 7-8.5 µm. are strongly dextrinoid, smooth, thick-walled (ca. I u. diam.) and lack a germ pore. Basidia and cystidia were not observed

Notes

This new secotioid genus is characterised by the form of the fruiting bodies, the thick-walled, dextrinoid spores (without a germ pore), and the hymeniform cuticle. These characters put the genus close to Lepiota s.l., but it has nothing in common with Brauniella Rick ex Singer 1955 another related secotiaceous genus known from South America.