Crystallodon subgelatinosum M & Alvarenga & Gibertoni 2021, comb. nov.
Creators: name: M, Renato Lúcio
name: Alvarenga, endes
name: Gibertoni, Tatiana Baptista
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Auriculariales
Crystallodon
Crystallodon subgelatinosum

description: Crystallodon subgelatinosum (Bodman) Alvarenga & Gibertoni comb. nov.   (Figs 1, 2)  
 Heterochaete subgelatinosa Bodman, Lloydia 15 (4): 228 (1953).   
MYCOBANK NUMBER. — MB 832485.  
HOLOTYPE. — Panama. Chiriquí, Casita Alta, above Boquete, 23.VIII.1937, G.W. Martin 4424 [NY(NY00738348)].  
 SYSTEMATIC POSITION. — Basidiomycota, Agaricomycetes, Auriculariales, Incertae Sedis , Crystallodon.   
 SPECIMENS EXAMINED. — Brazil. Pernambuco, Olinda, Sétimo Grupo de Artilharia de Campanha (7° GAC), 16.VI.2018, Gibertoni, TB (TBG 4b, TBG BF-18001 – URM 93445); Chikowski, R.S. (RC1609 – URM 93444); Tamandaré, Reserva Biológica de Saltinho, 25.VI.2018, Xavier-Lima, V (VXLF166 – URM 93443).   DESCRIPTION   Basidiomata   
Annual, resupinate, effused, closely adnate, later fusing with adjoining basidiomata, gelatinous when fresh, crustaceous when dried. Margin adnate, fimbriate, paler than hymenial surface (5C4). Hymenial surface gelatinized when fresh, light brown (5D5), densely covered by sharp-pointed sterile spines formed by hyphae enveloped by often apically branched crystals, spines 75-355 × 35-40 µm [50-80 µm, notes by Viacheslav Spirin about the type specimen (pers. com.)], 5-6 per mm. Hyphal structure monomitic, hyphae clamped.   Subiculum   
Not clearly differentiable, subhymenium with hyphae hyaline, thin-walled, 1-2.5 µm, clamped.   Cystidia   
Fusiform, cylindrical to often sinuous, 45-50 × 4-7 µm, some with refractive content.   Hyphidia   
Abundant in hymenium, hyaline, thin-walled, 0.5-1 µm at apex.   Fertile hyphae   
1-3 µm, tortuous, forming 2-4 basidia at the apex.   Basidia   
Ellipsoid-ovoid, 4-celled, 10.7-18.6 × 4.8-8.2 µm [15-20 × 10-12 µm in the original description by Bodman (1952); (14.2-)15-19.8 (-22) × (8-) 8.5-14.2(-16) µm by V. Spirin (pers. com.)].   Basidiospores   
Cylindrical to broadly cylindrical, slightly curved, (8-) 8.0- 11.7 (-12) × (3.7-) 4-6.1 (-6.6) µm (n = 24/1), L =10.4, W = 5.21, Q’ = (2.4-) 1.64-2.65, Q =2.26, with oil droplets in the cytoplasm [(9-)10-13(-15) × (4.5-)5-6(-7.5) µm in the original description by Bodman (1952); 10-13.9 × 5-6 µm by V. Spirin (pers. com.)].  NOTES  
 Crystallodon subgelatinosum comb.nov. can be easily recognized by the hyphal pegs, formed by few subicular hyphae densely covered with angular crystals, and by the dark brown hymenophore. The presence of hyphal pegs covered by crystals may occur in different genera of Auriculariales (e.g. Adustochaete, Eichleriella) (Malysheva & Spirin 2017; Alvarenga et al. 2019); however, such hyphal pegs are commonly formed by thickwalled hyphae from the subiculum, and thus are different from those of Crystallodon Alvarenga gen. nov.   
 Crystallodon subgelatinosum comb. nov. was first described by Bodman (1952) as Heterochaete subgelatinosa, based on specimens from Panama, this being the only record of the species until now. Basidia and basidiospores from the Brazilian collections are slightly smaller than those from the original description(Bodman 1952) and the notes provided by V. Spirin (pers. com.), and spines are narrower than those observed by V. Spirin (pers. com.); therefore, these collections may represent a different species. However, we prefer to consider these differences as due to intraspecific variation until additional material has been collected from the type locality, and morphologically and genetically analyses for a better distinction and delimitation of the taxon.
description: Published as part of M, Renato Lúcio, Alvarenga, endes & Gibertoni, Tatiana Baptista, 2021, Crystallodon Alvarenga gen. nov., a new genus of the Auriculariales from the Neotropics, pp. 17-24 in Cryptogamie, Mycologie 20 (2) on pages 21-23, DOI: 10.5252/cryptogamie-mycologie2021v42a2, http://zenodo.org/record/7815213