R-L categories correct, but text here does not match final assessment. Updated version will be published in IUCN´s Red List June or Nov 2019.
Neoalbatrellus subcaeruleoporus, probably an ectomycorrhizal fungus associated with Tsuga heterophylla, is restricted in its distribution to the coastal areas of western North America from British Columbia into northern California. Despite medium-sized, charismatic blue sporocarps, it is obviously rare and only reported a few times. During intensive surveys in Oregon and Washington, the species was never encountered. The inferred population size is estimated to be less than 2000 and considered under criteria D1 as NT.
Neoalbatrellus subcaeruleoporus was not until 2016 distinguished from the eastern species N.caeruleoporus (Audet & Luther, 2016). Existing records in databases such as Mycoportal.org are easily assigned to either species based on their distinct distributions.The eastern species has been more often recorded than the western species.
Neoalbatrellus subcaeruleoporus is confined to the coastal regions of British Columbia and Vancouver Island (Canada), the Cascades in Washington and Oregon, southwards along the coast into Sonoma County in California (USA). Restricted to the distribution area of Tsuga heterophylla.
Neoalbatrellus subcaeruleoporus is endemic and only known from a few scattered sites in British Columbia, Washington, Oregon and in coastal California (Audet & Luther, 2016; Castellano et al., 1999). It is obviously a rare fungus, having large and charismatic blue mushroom species and yet only reported up to a total of at most 30 sites (mycoportal.org, 2018). Despite being a Survey and Manage species and looked after during the last 20 years (Castellano et al., 1999), it is not reported from suitable habitat in Oregon and Washington. Casual observations of this species in the area covered by the Northwest Forest Plan have been made (see mushroomobserver.org).
Population Trend: Uncertain
Neoalbatrellus subcaeruleoporus is terrestrial, presumably forming ectomycorrhiza with Tsuga heterophylla, in various different stages of forest development, also with young trees. Fruiting repeatedly at the same location, implying its mycelia to be long-lived (cf Dahlberg and Mueller, 2011), but most often not in consecutive years. Often fruiting on non-natural disturbed soil surfaces, such as road banks.
Listed as a Strategy 1 Fungal species in the Northwest Forest Plan (Castellano et al., 1999) (as Albatrellus caeruleoporus), and being surveyed for since 1998.
The species is not known to be used.
Audet, S., Luther B.S., 2016. Neoalbatrellus subcaeruleoporus sp. nov. (Scutigeraceae) from western North America. Mycotaxon 130: 1191–1202. http://dx.doi.org/10.5248/130.1191
Castellano, M.A., J.E. Smith, T. O’Dell, E. Cazares & S. Nugent, 1999. Handbook to Strategy 1 Fungal Species in the Northwest Forest Plan. PNW-GTR-476.
Dahlberg A & Mueller G. 2011. Applying IUCN red-listing criteria for assessing and reporting on the conservation status of fungal species. Fungal Ecology 4: 1-16
Mycology Collections Portal, http://www.mycoportal.org [accessed February 2018, under Albatrellus caeruleporus and Neoalbatrellus subcaeruleoporus]