Tulostoma obesum Cooke & Ellis, Grevillea 6: 82. 1878.

Jeppson, Mikael, Altes, Alberto, Moreno, Gabriel, Nilsson, R. Henrik, Yolanda Loarce,, Bustos, Alfredo de & Larsson, Ellen, 2017, Unexpected high species diversity among European stalked puffballs - a contribution to the phylogeny and taxonomy of the genus Tulostoma (Agaricales), MycoKeys 21, pp. 33-88 : 58

Tulostoma obesum Cooke & Ellis, Grevillea 6: 82. 1878. Figures 2k, 5c

Holotype.

U.S.A., Colorado, Coke 2715 (K 39158); Isotype: (NY!)*

Sequenced Spanish collections were shown to be identical with the ITS sequence of the isotype from Colorada, USA (Cooke 2715, NY). With respect to morphology, T. obesum reminds of a species reported under T. obesum or T. volvulatum ( T. volvulatum var. obesum ) by Babos (1999), Calonge (1998), Hollós (1904), and Rimóczi et al. (2011) from the Iberian Peninsula and East Central Europe. However, according to molecular data, those records can be attributed to other species despite sharing a number of morphological features with T. obesum . SEM-photos for T. obesum show completely smooth spores (Figure 2k). Photos of the holotype and isotype collections at K and NY (habit and spore ornamentation under SEM) were included in Altés et al. (1999).

Habitat and distribution.

A psammophilous species originally described from Colorado. In Europe it is recorded from littoral sand dunes and halophytic steppe habitats in SE Spain.

Other specimens examined.

SPAIN, Almería: Cabo de Gata, La Salina, NW part, among halophilous vegetation on sand, 21 Apr. 2008, M. Jeppson 8695 (GB)*; Almería: Tabernas, Puente de los Callejones, among halophilous vegetation on sandy rambla, 16 Feb. 2003, J. Jeppson, M. Jeppson 6305 (GB); Ibidem, 22 Apr. 2008, M. Jeppson 8707 (GB)*; Ibidem, 22 Apr. 2008, M. Jeppson 8708 (GB); Castellón: Oropesa del Mar, dunas litorales con gramíneas, 8 Dec. 1995, J. Ayllón (AH 20901, GB)*.