Tulostoma

Hernández-Navarro, Eduardo & Cappello-García, Silvia, 2024, Tulostoma subreticulatum (Agaricomycetes, Agaricales): a new species of stalked puffball from Mexico, Phytotaxa 653 (2), pp. 101-114 : 110-111

Key to Tulostoma species with tubular stoma and verrucose exoperidium

1. Sphaerocist present in the endoperidium............................................................................................................................................2

- Sphaerocist absent in the endoperidium .............................................................................................................................................3

2. Sphaerocyst abundant in endoperidium; echinulate basidiospores 4.7–6.5 μm not subreticulated ............................. T. squamosum

- Sphaerocist rare in the endoperidum; sub reticulated basidiospores 4.6–6.1 μm................................................... T. subsquamosum

3. Uncolored endoperidium ....................................................................................................................................................................4

- Colored endoperidium ........................................................................................................................................................................7

4. Mycosclereids absent in the endoperidium ........................................................................................................................................5

- Mycosclereids present in the white to cinereous endoperidium; basidiospores (5.5) 6.8 –7.8 (8.5) μm, irregularly echinulate, with anastomosed columns.......................................................................................................................................................... T. dennisii

5. Exoperidium hyphal-verrucose, stipe slender 20–50 × 2–3 mm, basidiospores 4.0–6.0 μm ........................................ T. calcareum

- Stouter stipes with larger basidiospores .............................................................................................................................................6

6. Light brown verrucae, creamy to grayish white endoperidium, stipe 20–35 × 4–6 mm basidiospores 7–9 × 6.8 µm, echinulate ...... ................................................................................................................................................................................ T. loonbanglaense

- Reddish brownish verrucae conformed by pseudo parenchymatous cells up to 250 μm in length, basidiospores (5)5.73 × 6.25(8.7) μm ........................................................................................................................................................................... T. dominguenziae

7. Ovoid basidiospores 6–8 × 4–5 μm; exoperidium with dark brown verrucae, endoperidium cinnamon brown ................. T. matae

- Basidiospores globose ........................................................................................................................................................................8

8. Basidiospores subreticulated ..............................................................................................................................................................9

- Basidiospores not subreticulated ......................................................................................................................................................10

9. Spore-sac 5–11 mm diam, light brown verrucae, reddish brown endoperidium, stipe up to 30 mm, basidiospores 3.5–5 μm, sub reticulated ................................................................................................................................................................ T. subreticulatum

- Spore sac 9–13 mm diam, dark brown verrucae, brown endoperidium, stipe 35–50 × 2–2.5 mm, basidiospores 5.4–7.2 μm, sub reticulated ...................................................................................................................................................................... T. dumeticola

10. Basidiospores verrucose 4–4.8 (5.6) × (3.2) 4–4.8 μm, with low verrucae up to 0.8 μm; exoperidium sub verrucose, purplish gray endoperidium ................................................................................................................................................................... T. tropicale

- Basidiospores echinulate ..................................................................................................................................................................11

11. Light olive brown verrucae, pinkish endoperidium, echinate basidiospores (6)7.5–9.4(10.3) × (4)6.3–8.2(9.4) μm ..... T. ahmadii

11b. Dark brown verrucae, ochraceous to cinereous endoperidium, stipe 65 × 3mm, basidiospores 6–7.8 um with notable pyramidal spines .................................................................................................................................................................................. T. pusillum