FIGURE 3. Ornamentation of basidiospores of Afroboletus and Strobilomyces. a. Afroboletus sequestratus (PC 0723575, type), showing the longitudinal costae; b. Afroboletus sequestratus (PC 0723575, type), showing the hilar appendix with a basal rim (arrow); c. Afroboletus multijugus (PC 0723570), showing the longitudinal costae, the basal rim (arrow) around the apiculus and the non-differentiation of a suprahilar plage; d. Afroboletus luteolus (SYN 1836), showing the longitudinal costae, the basal rim (arrow) around the apiculus and the absence of a suprahilar plage; notice that a secondary surface ornamentation of longitudinal ridging with occasional branching is present between the costae; e. Strobilomyces pteroreticulosporus (HKAS 91274), showing the reticulate ornamentation, and the presence of a suprahilar plage (arrow); f. Strobilomyces seminudus (HKAS 59461), showing the subcristate to verrucose ornamentation, and the presence of a suprahilar plage (arrow). Bars = 2 μm. Photos by L.H. Han.

Published as part of Han, Li-Hong, Buyck, Bart, Yorou, Nourou S., Halling, Roy E. & Yang, Zhu L., 2017, Afroboletus sequestratus (Boletales), the first species with sequestrate basidioma in the genus, pp. 11-20 in Phytotaxa 305 (1) on page 17, DOI: 10.11646/phytotaxa.305.1.2, http://zenodo.org/record/13694728