Gomphus

Singh, Shiny, Verma, Komal, Kumar, Sanjeev & Sharma, Yash Pal, 2024, Gomphus indicus, a new species of Gomphaceae from Northwestern Himalayas of Jammu and Kashmir, India, Phytotaxa 652 (1), pp. 69-77 : 76

A worldwide key to the species of Gomphus

A revised key to the genus Gomphus is presented here for eight species including the new taxon. The taxonomic characters of the previously known species are extracted from Liu et al. (2022) with slight amendments.

1a. Basidiomata becoming merismatoid at maturity, pileus fan shaped ..................................................................................................2

1b. Basidiomata unipileate at maturity, occasionally merismatoid, pileus funnel-shaped to applanate, occasionally fan-shaped ..........4

2a. Pileocystidia present, Pileus orangish brown to dark violet, basidiospores 10–15 × 4–7.5 µm, Asia, Europe, North America.......... ............................................................................................................................................................................... Gomphus clavatus

2b. Pileocystidia absent, pileus otherwise ................................................................................................................................................3

3a. Basidiospores <13 µm long............................................................................................................................................................…4

3b. Basidiospores 13–15.5 µm long .........................................................................................................................................................5

4a. Basidiospores 7.5–10 × 3.5–5 µm; pileus brown or occasionally rosaceous; hymenium wrinkled, reticulate to almost poroid, pale violet to milky coffee-coloured; Cameroon, Democratic Republic of Congo, Uganda.................................................. G. brunneus

4b. Basidiospores 9–11 × 6–7 µm, pileus gray-blue to blue or blue-purple; hymenium wrinkled, gray-blue to blue-purple or gray; southeastern China.............................................................................................................................................................. G. matijun

5a. Basidiospores 13–15 × 5.5–6 µm; pileus sordid yellow to orangish brown; hymenium wrinkled, violet; Algeria, Morocco, and Spain................................................................................................................................................................................. G. crassipes

5b. Basidiospores 11.5–15 × 6–9 µm, Pileus bluish violet, China........................................................................................ G. violaceus

5c. Basidiospores 10.3–15.5 × 4.3–7.5 µm, Pileus yellowish brown to purplish brown, southwestern China.................... G. orientalis

6. Basidiospores>15 µm, pileus otherwise............................................................................................................................................7

7a. Basidiospores 15–21.5 × 6–7.5 µm, pileus greyish yellow or ash blonde; hymenium wrinkled, light violet, pastel violet to greyish violet; India.......................................................................................................................................................................... G. indicus

7b. Basidiospores 14–17 × 5–7 µm; pileus dull “benzo brown”, to deep Quaker Drab”, bruising darker, some pale surface over-center; hymenium delicately wrinkled, purple-gray; southeastern United States.................................................................. G. ludovicianus