Tulostoma pannonicum Jeppson, Altes , G. Moreno & E. Larss., sp. nov .

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 : 58-59

Tulostoma pannonicum Jeppson, Altes, G. Moreno & E. Larss., sp. nov . Figure 13

Holotype.

Hungary, Bács-Kiskun, Fülöpháza, Fülöpházi Homokbuckák, N of road 52, sand steppe vegetation, Leg: J. Jeppson, M. Jeppson, 11 Apr. 2006, M. Jeppson 7764 (GB!, isotype AH).

Etymology.

The name refers to Pannonia, an ancient Roman province in Central Europe, where this species was first collected.

Description.

Spore-sac subglobose, 4-7 mm in diameter. Exoperidium indistinct to thinly membranous, incrusting sand, remaining as a cup-like structure at the base of the spore-sac (Figure 13d). Endoperidium greyish white, smooth, or pitted from detached sand grains. Mouth indistinct to fibrillose-fimbriate (Figure 13f). Socket inconspicuous, slightly separated. Stem slender, 10-20 x 1-2 mm, ochraceous to pale greyish, smooth, somewhat longitudinally furrowed, with a slightly widened base and a distinct pseudorhiza (Figure 13a,d). Mature gleba ferrugineous. Capilltium 3-5 µm in diameter with even inner walls and abundant, strongly widened septa (Figure 13b). The capillitium easily breaks up at the septa. Spores subglobose to broadly ellipsoid, 3.5-4.5 µm (av. 4.0 µm), smooth. Under SEM the spore wall is smooth to slightly rugulose (Figure 13g-i).

Habitat and distribution.

The species is recorded from exposed sand steppe habitats on calcareous soil in Hungary.

Notes.

Rimóczi et al. (2011) recorded this species from Hungary as T. leiosporum and noted that the spores were slightly smaller than those of the lectotype of T. leiosporum , deposited in Herbarium S. Some photos of the lectotype collection of T. leiosporum (habit and spore ornamentation under SEM) were included in Moreno et al. (1997).

Other specimens examined.

HUNGARY, Bács-Kiskun: Fülöpháza, Fülöpházi Homokbuckák, S of road 52, sand steppe vegetation at forest edge ( Pinus ), 12 Oct. 2008, E. Larsson, J. Nilsson, T. Knutsson, M. Jeppson 8715 (GB)*; Orgovány, Orgoványi rétek, sand steppe vegetation, 17 Jun. 1999, M. Jeppson 990617a (GB)*; Ibidem, among Syntrichia on sand, 12 Apr. 2006, J. Jeppson, M. Jeppson 7803 (GB)*.