Gastroleccinum scabrosum has only been recorded in on site in North America in 1966 and 2 sites in Taiwan in 1979. There are no recent records or more information on this species, and habitat preference is not yet clear. Given their presence in very distinct regions and types of habitats, specimens from Taiwan and North America should be reviewed to confirm that they belong to the same species, and targeted search efforts are needed to estimate current population size. For now, the species is assessed as Data Deficient (DD).
G. scabrosum is the only known species in the montypic genus Gastroleccinum. It was originally described as Gastroboletus scabrosus (Mazzer and Smith, 1967), but later transferred into a new genus, Gastroleccinum, in 1989 (Watling, 2008).
Why suggested for a Global Red List Assessment?
G. scabrosum has been recorded in Michigan, USA (Mazzer and Smith, 1967) and Taichung and Nantou in Taiwan (Yeh and Chen, 1980).
Population and Trends
G. scabrosum is known from only 3 locations, from observations made in 1966 and 1979. Since it is not particularly inconspicuous, the lack of records indicates this could be a rare species, but without more recent and targeted search efforts as well as more information on habitat preferences it is difficult to estimate current population size.
Population Trend: Uncertain
Habitat and Ecology
Specimens were found in very distinct types of habitats in North America and Taiwan. In North America it was found growing gregariously on sandy soils in second growth oak-hickory forest and assumed to be ectomycorrhizal with Quercus sp. (Mazzer and Smith, 1967, Watling, 2008), while in Taiwan it has been found in mixed forest (alt. 3200-3400) and in a Sasa bamboo forest (3000-3200) (Yeh and Chen, 1980). More research into habitat preferences for this species is needed.
A taxonomic review is recommended to confirm that specimens from North America and Taiwan belong to the same species and confirm placement in a monotypic genus, namely through the use of molecular data. Moreover, targeted search efforts and research into habitat preferences are needed to help estimate area of distribution and estimate population size.
TaxonomyPopulation size, distribution & trendsLife history & ecologyThreats