Proliferodiscus tricolor

Proliferodiscus tricolor (Sowerby) Baral, Agarica 28: 34. 2009.

MycoBank MB540765

AUTHORS: Olariaga, I. & De Esteban, J.

Peziza tricolor Sowerby., Col. Fig. Engl. Fung. 3: [51]. 1803, nom. sanct., Fr., Syst. Mycol. 2: 134. 1822.

Dasyscyphus tricolor (Sowerby) Gray, Nat. Arr. Brit. Pl. 1: 671. 1821.

Erinella tricolor (Sowerby) Quél., Compt. Rend. Assoc. Franç. Avancem. Sci. 11: 406. 1883 [‘1882’].

Lachnella tricolor (Sowerby) W. Phillips., Man. Brit. Discomyc.: 240. 1887.

Lachnellulla tricolor (Sowerby) Dennis, Persoonia 2(2): 184. 1962.

= Peziza episcopalis Dufour ex Desm., Ann. Sci. Nat. sér. 2, 19: 367. 1843.*

= Erinella tricolor var. episcopalis (Dufour ex Desm.) Quél., Enchir. Fung.: 303. 1886.

= Dasyscyphus caeruleus J. Schröt., Pilze Schles. 3(2): 86. 1893 [‘Dasyscypha caerulea’].*

= Trichopeziza caerulea (J. Schröt.) Sacc., Syll. Fung. 11: 412. 1895.

*Synonymy based on Hofton et al. (Agarica 28: 34. 2009) and revision of the protologue.


Taxonomic classification

phy Ascomycota

sbp Pezizomycotina

cls Leotiomycetes

sbc Leotiomycetidae

ord Helotiales

fam Lachnaceae

gen Proliferodiscus

sp Proliferodiscus tricolor


*Apothecia scattered or densely gregarious, subsessile, 0.8–2.5 mm diam. Disc ochre, orange ochre when dehydrated, plane to slightly concave. Margin with erect and straight hairs, grey to violaceous grey, usually more violaceus, pale violet when dehydrated.

Paraphyses distantly septate, not constricted at septa, unbranched, 2–3 μm diam, without guttules, exceeding immature asci. Asci cylindrical and with a more or less conical apex, with a euamyloid apical ring (reported as sometimes faintly hemiamyloid in Hofton et al. 2009), thin-walled, with a basal crozier, 8-spored, up to *90–112 × 7.5–9 μm. Ascospores subcylindrical to narrowly fusoid, multiguttulate, 1-septate when overmature, hyaline, *(10–)13-16(–17) × (2.5–)3–4 µm. Hairs hyaline, straight to slightly flexuous, septate, thin-walled, with a warted surface, up to 200 × 2.5-3.5(–5) μm, unchanged in KOH. Ectal excipulum of a textura prismatica, hyaline to pale ochre, with cells 5-8 µm broad. Medullary excipulum of a textura intricata, non-gelatinized. Dark violet granules present on the ectal excipulum.

*Descripción based on living material.

Habitat and distribution: This xerotolerant species grows specifically on bark of living Quercus (Q. robur, Q. humilis, Q. pyrenaica, Q. suber), generally on ancient tree, but also on younger trees in localities in which ancient trees are present. Although scarce reports have been made in our territory so far, it is probably widespread.


References in our territory
Specimens in scientific collections

Reference specimen marked in bold

(Ca): SIM:Fungi:001437 (det. I. Olariaga; field observation)

CR: ARAN-Fungi 14191 (det. I. Olariaga)

M: ARAN-Fungi 09500 (det. I. Olariaga)

Na: ARAN-Fungi A5057356 (det. I. Olariaga), ERD-5860 (det. E. Rubio)

SS: ARAN-Fungi 00662 (det. I. Olariaga)


Sequences in public databases obtained from material collectedin our territory


In situ apothecia (ARAN-Fungi A5057356). Photograph: I. Olariaga.

In situ apothecia (ARAN-Fungi 14191). Photograph: J. De Esteban.

In situ apothecia (ARAN-Fungi 14191). Photograph: J. De Esteban.

In situ dehydrated apothecia (ARAN-Fungi 09500). Photograph: I. Olariaga.

Section of apothecial margin in water (ARAN-Fungi 14191). Photograph: J. De Esteban.

Section of medullary excipulum in water (ARAN-Fungi 14191). Photograph: J. De Esteban.

Marginal hairs in water showing dark purple granules (ARAN-Fungi 14191). Photograph: J. De Esteban.


Asci in water showing a pleurorhynchous base (ARAN-Fungi 14191). Photograph: J. De Esteban.

Asci in IKI, showing an euamyloid apical pore (ARAN-Fungi 14191). Photograph: J. De Esteban.

Ascospores in water (ARAN-Fungi 14191). Photograph: J. De Esteban.






How to cite this sheet:

Olariaga I. & De Esteban J. 2020. Proliferodiscus tricolor (Sowerby : Fr.) Baral. Fichas SIM (updated on 25-VI-2020)