Unexpected high species diversity among European stalked puffballs - a contribution to the phylogeny and taxonomy of the genus Tulostoma (Agaricales) Author Jeppson, Mikael Author Altes, Alberto Author Moreno, Gabriel Author Nilsson, R. Henrik Author Yolanda Loarce, Author Bustos, Alfredo de Author Larsson, Ellen text MycoKeys 2017 21 33 88 http://dx.doi.org/10.3897/mycokeys.21.12176 journal article http://dx.doi.org/10.3897/mycokeys.21.12176 1314-4049-21-33 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) , Hollos (1904) , and Rimoczi 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 Altes 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, Almeria : Cabo de Gata, La Salina, NW part, among halophilous vegetation on sand, 21 Apr. 2008, M. Jeppson 8695 (GB)*; Almeria : 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); Castellon : Oropesa del Mar, dunas litorales con gramineas , 8 Dec. 1995, J. Ayllon (AH 20901, GB)*.