Clitopilus (Rabenh.) P. Kumm., 1871

Fatima, Nadia, Usman, Muhammad & Khalid, Abdul Nasir, 2022, Clitopilus chichawatniensis sp. nov. (Entolomataceae, Agaricales) from Pakistan, Phytotaxa 567 (3), pp. 257-268 : 266

A key to all species of the genus Clitopilus in Pakistan

1. White basidiomata, ovoid to ellipsoid hyaline basidiospores with ridges, basidia clavate to broadly clavate, cystidia absent........... ........................................................................................................................................................................................ ( Clitopilus ) 2

2. Pileus pleurotoid, 50–65 mm wide, basidiospores with ridges up to 5, stipe eccentric up to 3 cm in length, basidiospores 6.21–8.38 × 4.79–6.41 µm with 3–5 ridges............................................................................................................. Clitopilus chichawatniensis

- Pileus non-pleurotoid, basidiospores with more than 5 ridges...........................................................................................................3

3. Pileus> 40 mm, clitocyboid 10–70 mm wide, stipe prominent 15–45 mm in length, basidiospores 6–8.5 × 4.5–5.5 µm with 9–11 ridges .................................................................................................................................................................................... C. apalus

- Pileus <40 mm side with reduced stipe up 2 cm ................................................................................................................................4

4. Pileus plano-convex to umbilicate, stipe reduced ..............................................................................................................................5

- Pileus omphaloid to infundibuliform, stipe absent.............................................................................................................................6

5. Pileus 8–22 mm wide, stipe reduced 1–2 cm in length, basidiospores 6.7–8.5 × 3–4 µm with 6–9 ridges............................. C. Peri

- Pileus 5–15 mm wide, basidiospores 6–9 × 4–5.5 µm with 7–10 ridges.......................................................................... C. hobsonii

6. Pileus 5–20 mm wide, basidiospores 5.5–8.5×3.2–4.2 µm with 6–9 ridges................................................................. C. scyphoides

- Pileus 10–40 mm wide, basidiospores 7–9.5 × 4.5–6 μm with 5–7 ridges ........................................................................ C. pinsitus