Geastrum senoretiae J.C. Zamora in Zamora et al., Mycologia 106: 1205. 2014. [pdf]
MycoBank MB800471
AUTORES: Zamora, J.C. & Sánchez, L.
Clasificación taxonómica
phy Basidiomycota
sbp Agaricomycotina
cls Agaricomycetes
sbc Phallomycetidae
ord Geastrales
fam Geastraceae
gen Geastrum
sp Geastrum senoretiae
Descripción
Basidiocarps subglobose just prior expansion, hypogeal. Exoperidium splitted in 4–8 unequal rays, 8–29 mm diam. apparently, 13–31 (–35) mm diam. when forced in horizontal position, mostly arched but sometimes planar, not saccate when mature, not hygrometric although some basidiomata may show the tips of the rays curved to the endoperidial body. Mycelial layer thin, whitish to pale cream, strongly intermixed with debris from the substrate, attached to the fibrous layer (rarely peeling off in some areas). Rhizomorphs sometimes present, up to 9 mm long, whitish, and intermixed with debris. Fibrous layer mostly papyraceous when denuded, sometimes moderately coriaceous, whitish to cream colored. Pseudoparenchymatous layer whitish to pale cream in newly expanded, fresh basidiomata, soon cream to ochraceous cream, later ochraceous brown to brownish, darker when dried, frequently cracked, attached to the fibrous layer, up to 1.5 mm thick when fresh, <0.2 mm thick in dry state, not very persistent. Endoperidium subglobose to ovoid, sometimes irregular, 3–10 mm diam., pale ochraceous brown to dark greyish brown; endoperidial surface mostly glabrous or almost so, rarely with very scattered and short protruding hyphae, with small crystals from the mesoperidium in young basidiocarps. Peristome finely plicate, mostly with the same color as the endoperidium or slightly lighter or darker, conical to almost flat, rarely irregular, <0.5–1.5 (–2) mm high, indistinctly to very faintly delimited, with (19–) 23–48 (–65) shallow folds, ≤0.2 mm depth, sometimes reduced to irregular ridges; ostiole often fimbriate. Stalk almost absent or very short, 0–0.8(1) mm high, whitish to cream. Apophysis absent or poorly developed, with the same color or slightly lighter than the rest of the endoperidium. Mature gleba dark greyish brown. Columella weak, subglobose to broadly ellipsoid, about 1.5–3 mm high.
No basidiocarps in a proper basidial state seen, but sporadic sclerified basidia have been observed in some mature basidiomata of the holotype, being ellipsoid to clavate, rarely subglobose, mostly stalked, 10–22.5 × 6–10.5 µm (stalk not included), stalk 1.5–6 µm long, complete clamps were not observed at basis, but a basal “clamp scar” is often visible; mostly with cytoplasmic drops; thin- to thick-walled, walls almost hyaline to brownish; with 2–6 apical sterigmata, 1–2 µm long. Basidiospores globose, 4–5.5 µm (n= 200) diam. including ornamentation, brownish to yellowish brown, with 0.3–0.6 (–0.8) µm high brown warts. Capillitial hyphae 3–7.5 µm wide, aseptate, very rarely branched, mostly straight, thick-walled (walls 1.5–3 µm thick), with narrow lumen, mostly visible; tips acute to rounded, about 1–2.5 (–3) µm diam.; surface naked or encrusted with debris. Prismatic crystals up to 10 × 7 µm, and bipyramidal crystals up to 12 µm diam., sometimes present in the mature gleba. Endoperidium composed of 5–11 µm wide, brownish to yellowish brown, aseptate, mostly unbranched, slightly sinuous, strongly intertwined, thick-walled (walls 1.5–4 µm thick) hyphae, lumen visible; surface normally with few protruding hyphae, not well differentiated from the rest, 7–13 µm wide, and some bipyramidal crystals, about 5–15 µm diam. Peristomal hyphae (5–) 6–11 µm wide, aseptate, mostly unbranched, thick-walled (walls 2–3.5 µm thick), lumen visible, slightly sinuous, narrowing at base and apex, tips mostly rounded, a few acute, (2.5–) 3–5(6.5) µm diam.; surface more or less naked or with a few encrusted debris. Mesoperidium difficult to discern, present at least in the youngest basidiomata but reduced, consisting of 2–15 µm diam. bipyramidal crystals and a few (2–) 2.5–3 µm wide, hyaline, branched, thin-walled, clamped hyphae. Pseudoparenchymatous layer of thin-walled (walls c.1 µm thick), hyaline to yellowish cells, variable in shape and size, about 35–90(100) µm diam. Fibrous layer with 3.5–7 (–7.5) µm, hyaline to yellowish, aseptate, straight or slightly sinuous, intertwined, mostly unbranched, thick-walled (walls 1.5–2.5 µm thick) hyphae, lumen visible. Mycelial layer double-layered; inner layer consisting of 2–4 µm wide, strongly glued together, more or less hyaline, branched, thin-walled and clampled hyphae; outer layer with 1.5–3.5 (–4) µm wide, hyaline to somewhat yellowish, aseptate, rarely branched, comparatively more or less thick-walled (walls 0.5–1.5 µm thick) hyphae, lumen very narrow and difficult to perceive. Rhizomorphs mainly made up of 1–3 µm wide, hyaline to slightly yellowish, aseptate, sparsely branched, comparatively thick-walled (walls c.0.5–c.1.5 µm thick) hyphae, without lumen or with an almost indistinct lumen; some thin-walled, clamped hyphae present in the core; rose-like aggregates of bipyramidal crystals observed on the surface.
Ecología y distribución
Esta especie se ha encontrado en localidades bastante antropizadas de las ecorregiones «bosques ibéricos esclerófilos y semi-caducifolios» y «bosques mediterráneos del noreste de España y sur de Francia» (bioma de bosque y matorral mediterráneo de la ecozona paleártica). Estas áreas se localizan en suelos arenosos o arcillosos, neutros o ligeramente ácidos, cuya vegetación climácica deberían ser bosques de Quercus ilex s.l. (incluido Q. rotundifolia), pero pueden presentarse alternativamente matorral de Cistus spp. y Erica arborea, o plantaciones de Pinus, con zonas de suelo desnudo en las partes más degradadas. ESP: B (no publicado), Cc, CR, Co, J, Or.
Referencias de la especie en el territorio
- Zamora JC, Calonge FD, Martín MP. 2014. Combining morphological and phylogenetic analyses to unravel systematics in Geastrum sect. Schmidelia. Mycologia 106(6): 1199–1211. (Protólogo) [ESP: Cc, CR, Co, J, Or][pdf]
Especímenes en colecciones científicas
* material secuenciado
Espécimen de referencia marcado en negrita
- B: Herb. L. Sánchez LSS20151121-1; LSS20151128-4; LSS20161117-3.
- Cc: Herb. Zamora 145*.
- CR: MA-Fungi 39564*.
- Co: MA-Fungi 30257.
- J: MA-Fungi 86915* (holotipo), isotipos en AH 44862 y UPS F-700348; herb. Zamora 144; herb. Zamora 451; herb. Zamora 534.
- Or: MA-Fungi 32382*; MA-Fungi 32120.
Secuencias en bases de datos públicas y obtenidas de material del territorio
- MA-Fungi 86915: KF988459 (ITS), KF988594 (nrLSU), KF988729 (RPB1), KF988860 (ATP6).
- MA-Fungi 32382: KJ588616 (ITS), KJ588622 (nrLSU), KJ588628 (RPB1), KJ588634 (ATP6).
- MA-Fungi 39564: KJ588615 (ITS), KJ588621 (nrLSU), KJ588627 (RPB1), KJ588633 (ATP6).
- Herb. Zamora 145: KF988458 (ITS), KF988593 (nrLSU), KF988728 (RPB1), KF988859 (ATP6).
Izquierda: cuerpos fructíferos. Derecha arriba: detalle del peristoma. Derecha abajo: detalle del pseudoestípite. MA-Fungi 86915 (holotipo).
Cuerpos fructíferos. Herb. Zamora 451.
Cuerpos fructíferos. Herb. Zamora 451.
Cuerpos fructíferos. Herb. LSS20161117-3.
Cuerpos fructíferos. Herb. LSS20151128-4.
Basidiosporas al microscopio óptico. Herb. LSS20151121-1.
Caracteres micromorfológicos. Izquierda: superficie del endoperidio con cristales de oxalato cálcico dihidratado y algunas hifas generativas colapsadas. Derecha: basidiospora. MA-Fungi 86915 (holotipo).
Cómo citar esta ficha:
Zamora J.C. & Sánchez L. 2021. Geastrum senoretiae J.C. Zamora. Fichas SIM 27 (Actualizada el 19-I-2021). Disponible en: http://micologiaiberica.org/services/geastrum-senoretiae
