PDD 30625 – Russula pseudoareolata McNabb
Data provider:
New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa
Barcode:
PDD 30625
Type status:
Holotype
Specimen type:
Packet
Database record added:
11 April 2011
Database record updated:
24 February 2023
Components
Primary component
Active identification
Determined name:
Russula pseudoareolata
Determiner:
R.F.R. McNabb
Identification date:
Preferred name:
Russula pseudoareolata McNabb
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Russulales
Family:
Russulaceae
Identification type:
Determination
Type status:
Holotype
Associations:
has host Nothofagus menziesii
Substrate:
ground
Other components
Active identification
Determined name:
Nothofagus menziesii
Determiner:
Identification date:
Preferred name:
Lophozonia menziesii (Hook.f.) Heenan & Smissen
Division:
Tracheophyta
Class:
Magnoliopsida
Order:
Fagales
Family:
Nothofagaceae
Identification type:
Determination
Present:
no
Collection events
Primary collection event
Collection event type:
Unknown
Standard locality
Location:
Karamea, Umere
Georeferences:
Latitude and Longitude (WGS84):
-41.2623 172.175
Verbatim locality:
Karamea, Umere
Verbatim collector:
R.F.R. McNabb
Standardised collector:
Robert F. R. McNabb
Collectors reference no.:
RFRM 132 (Russula)
Verbatim date:
1968/01/15
Start date:
1968-01-15
Country:
New Zealand
New Zealand Area Codes:
Nelson
Native lands:
Ngāi Tahu
Ngāti Apa ki te Rā Tō
Ngāti Rārua
Ngāti Toa Rangatira
Te Atiawa o Te Waka-a-Māui
Georeferences:
New Zealand Map Grid:
2440900E 5993560N (WGS84 -41.261691 172.175605)
Specimen notes
Public Note:
[McNabb:] Holotype 132 K32, group 28. PILEUS: 7.5cm diam., deeply infundibuliform, slightly viscid, margins not radially marked, smooth in centre, cuticle creviced and areolate towards margins, brown in centre, areolae more pinkish browns towards margins, brown in centre, the aroleae more pinkish brown towards margins on a pallid fawn-brown background. No velar remnants present. GILLS: creamy brownish, lamellae simple or as often forked near stipe, lamellulae sparse, not in sequence, to 7mm deep, not or only faintly discoloured brownish at maturity. STIPE: 4.5cm long, 2.2 cm. diam., more or less equal, dry, finely felted particles at apex, faintly longit. Innately stretched reticulate towards base, annulus absent, faintly very very pinkish white to very pallid brownish white. Flesh brownish white slightly chambered. CONTEXT: brownish white, unchanging. TASTE: gills and context not distinctive. CHEMICAL CHARACTERS: formalin – n.r., phenol – slowly deep vinaceous; FeSO4 – immed. greyish green, guaiacol on stipe base – pallid salmon pink; KOH on pileus – darkening slightly, on context – yellowing slightly; NH4OH on pileus – darkening slightly; on context – n.r. HABITAT: solitary under Nothofagus menziesii, Nelson, Karamea, Umere, 15.1.1968, R.F.R. McNabb, ILLUSTRATIONS: painting K18. Cuticle of pileus composed of thin-walled, tinted septate hyphae 5-7.5um diam., ascending or +- repent or mixed, interwoven, not apparently gelatinised, with yellowish brown contents in KOH and aggregated in places. No indications of pilocystidia with granular contents. Cuticle of stipe composed of parallel to slightly interwoven, thin-walled, tinted, septate hyphae 4-6um diam., occ. aggregated in places. No indications of caulocystidia with refractive contents. Pleurocystidia scattered, numerous, thin-walled, yellowish with yellow granular contents in KOH, +- fusiform with acuminate or more often strangulated apices with an apical knob 70-90 x 6.8-10.5um. Basidia clavate hyaline 4-spored, sterigmata to 9um long, 40-57 x 9-12um. Hymenophoral trama intermixed, clamp connections absent,. Spores obovate, broadly elliptical, obliquely apiculate, apiculus prominent to 2.5um long, 9-11.2 x 7.5-9um. Ornamentation of heavy amyloid crests to 1.5um high joined by fine amyloid ridges and resulting in a complete or almost complete reticlulum. Plage area not dictinctive. [Ridley:] Basidiospores 8-9 x 7-8 um, [8.5-11 x 7.5-10 um] Qm 1.12, subglobose, Q 1.06-1.20, subglobose to broadly ellipsoid hyaline. Ornamented with moderately dense, obtuse to acute, amyloid verrucae aud crest to 1.25 um high, only occasionally confluent, joined by moderately fine, low, amyloid ridges forming an almost complete reticulum. Suprahilar plage distinct, inamyloid, very slightly flaking, c. 2.75 um wide. Hilar appendix prominent, obconical, oblique to 2.75 um long. McNabb described the plage as absent however both the light microscope and SEM showed a distinct although inamyloid, plage The ornanentation was type IIIB to IIIA. [Cooper] Originally tagged as R. tongarirensis. Also 140, 175, 213, 231, 266, 335, 74. Lamellulae not seen. Cap is infundibuliform, and more incurved than rimosa. SV -ve, pigment isn't much darker than cystidia which are brown anyway. No spore print. With plage (although spore has to be at just the right angle to see it), without amyloid spot. length=7.2–8.5µm (µ=7.7, σ=0.3), width=6.1–7.5µm (µ=6.8, σ=0.4), Q=1.0–1.2µm (µ=1.13, σ=0.06), n=20. Ornamentation to 1.2um. Gill trama does not show isodiametric cells of rimosa, but charcater is not stable.
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