Cortinarius sect. Carbonelli Soop

Cortinarius sect. Carbonelli Soop in Soop et al., Persoonia 42: 286. (2019), emend.

Type: C. carbonellus Soop (2001: 120) .

MycoBank MB 822959.

Description:— Basidiomata telamonioid, small to medium, dry. Pileus 10–50 mm diam., dry, grey-brown to dark brown or orange-brown. Lamellae purple-brown to violet, greyish blue, or dark grey, fairly crowded. Stipe cylindrical to clavate, silvery grey to yellowish grey with a violet tinge. Universal veil violet to red-brown, sparse to copious. Context greyish to vinaceous brown, marbled violet. Alkaline reaction orange to reddish lilac on context, cherry red on lamellae. Basidiospores ellipsoid to ± amygdaloid, 7–10 × 4–5.5 μm, rather weak to moderately strongly verrucose. In Nothofagaceae forest, South Pacific.

Comments:—The section originally contained only C. rattinus Soop (2001: 124) beside the type, but our analysis adds several species from the South Pacific ( Fig. 3 View FIGURE 3 ). Two of these, C. exlugubris Soop (2001: 98) and C. cupreonatus from the original section Xenosmatae (Soop 2002) have violet lamellae, but otherwise share the habit of C. xenosma , with robust, non-hygrophanous basidiomata and a copious universal veil that leaves ochraceous remnants on the pileus. The same is true for C. cf. minoscaurus , which in addition possesses a wide bulbous base to the stipe (see the NZ Fungi website (https://nzfungi2.landcareresearch.co.nz/) under PDD 72697). Currently included species with their known provenance are: C. areolatoimbricatus Cleland (1933: 191) (Aus), C. carbonellus (NZ) , C. cupreonatus (NZ) , C. exlugubris (NZ) , C. rattinus (NZ) , C. vernicifer Soop in Gasparini & Soop (2008: 199) ( NZ), C. cf. carbonellus (SAm), C. cf. minoscaurus (NZ) , C. cf. rattinus (NZ) .