Assessment Notes

Justification

Turbinellus kauffmanii is a widespread species; with subpopulations in western and eastern North America. The population is stable, and no decline has been noted. Therefore, it is assessed as Least Concern (LC).

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Taxonomic notes

This species was described from Washington, USA (Smith and Morse 1947) as Cantharellus kauffmanii, later transferred into the genus Gomphus (Corner 1966). Phylogenetic studies (Giachini 2004, Giachini and Castellano 2011) erected the genus Turbinellus (with T. floccosus as type), to accommodate these species.

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Geographic range

Turbinellus kauffmanii has been reported from much of North America but these reports likely represent a species complex. Western populations (corresponding to the type of T. kauffmani) are widespread in northern California, in coastal, Coast Range and Sierra Nevada forests, continuing north throughout the Pacific Northwest into southern British Columbia, Canada. Eastern North American populations are from southern Canada, throughout north-east USA, west to the upper mid-west, and south in the mountains. Should eastern and western North America subpopulations end up being distinct species, both would still be very widespread.

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Population and Trends

The population is widespread in both western North America, and the north-east and mountains in eastern North America. No decline has been noted.

Population Trend: stable

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Habitat and Ecology

It is ectomycorrhizal with conifers, especially fir (Abies spp.) and hemlock (Tsuga spp.), from low elevation to montane forests in western North America, and with hemlock and pine (Pinus spp.) in eastern North America. Western subpopulations appear to have a preference for, but are not restricted to, mature forests.

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Threats

No specific threats have been identified with regards to this species.

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Conservation Actions

This species was included on the US Forest Service Northwest Forest Plan species of special concern (Castellano et al. 2003). Subpopulations from eastern North America should be compared genetically with western North American collections.

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Use and Trade

No use/trade is known.

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Source and Citation

Siegel, N. 2021. Turbinellus kauffmanii. The IUCN Red List of Threatened Species 2021: e.T198480129A198487823. https://dx.doi.org/10.2305/IUCN.UK.2021-2.RLTS.T198480129A198487823.en .Downloaded on 23 September 2021

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• Country occurrence