There are only 7 records and the last was documented in 2007 in Chile. The Chilean Government Ministry of the Environment Wild Species Classification Committee has defined that due to the five localities known there is an estimate of only 10 localities. Criterions A, D, D and E are not usable because there is no information on population abundance or trends. Because of the decrease in habitat quality and area it was concluded to classify it as VULNERABLE VU B2ab(iii)
Also, severe habitat loss allows to use Criteria A. More than 50% habitat loss in the past 50 years. EN A2c
This specie is found from El Maule region to Los Rios region. It covers the range from the coast to the foothills of the Andes. EOO 43.558 km2. AOO 500 km2.
Only 7 collections in Chile from 5 localities, with an estimate of no more than 50. Its presence extension covers El Maule, Bio Bio, Araucania and Los Rios regions, with uncertain presence in Los Lagos region. Restricted to Chile, not present in Argentina.
Population Trend: Uncertain
Basidyome robust, growing singly or in small groups scattered soil and litter under Nothofagus (i.e. N. obliqua, N. dombeyi, N. glauca and N. leoni). Reaches 1,350 m of altitude. The largest and most robust of the four native Chilean species of Russula. Distinguished by fishy or rubber smell. Form basidyome in autumn-winter.
Known from 5 sites.
The major threat is associated with the reduction of its habitat. The deforestation of native forests covering the Maule Region and the Region de los Rios. Because of its association with Nothofagus forest formations, from low to medium altitudes this species also is under threat. There is a latent danger from excessive deforestation in its area of distribution, where the habitat is already fragmented. Habitat loss is the major threat.
Better understanding the ecology of the species.
GARRIDO N (1985) Index Agaricalium Chilensium. Bibliotheca Mycologica 99, J. Cramer, Vaduz, ISBN 3-76821435-10.
GARRIDO N (1988) Agaricales s.l. und ihre Mykorrizen in den Nothofagus-Wäldern Mittelchiles (Agaricales s.l. y sus micorrizas en los bosques de Nothofagus en Chile central). Bibliotheca Mycologica 120, J. Cramer, Berlin, Stuttgart, ISBN 3-443-59021-7.
SINGER R (1969) Mycoflora Australis. Beihefte Nova Hedwigia 29, J. Cramer, Lehre.
ALARCÓN J, VILLALOBOS N, LAMILLA C, CÉSPEDES CL (2013) Ceramides and terpenoids from Russula austrodelica Singer [Ceramidas y terpenoides desde Russula austrodelica Singer]. Bol. Latinoam. Caribe Plant. Med. Aromat.12 (5): 493 - 498.
GAJARDO, R (1999) Distribución vegetacional de Chile, Universidad de Chile.
COMITÉ CLASIFICACIÓN DE ESPECIES SILVESTRES, 11o Proceso de Clasificación de especies, Ministerio de Medioambiente, Gobierno de Chile.