# _Geronomy_
## 3 Results
### Taxonomy  
_Poriella_ C.L. [PERSON], gen. nov.  
MycoSBank: 840061. It is characterized by producing resupinate to effused-reflex basidiomata with dingy-yellowish to pale tan to ochraceous surface and a di-trimitic hyphal system with unbranched and strongly dextrinoid skeletal hyphae, and thick-walled, non-dextrinoid, cyanophilous basidiospores. Type species: _Poriella subacida_ ([PERSON]) [PERSON]. Etymology: _Poriella_ (Lat. ): referring to its similar appearance to the genus _Perenniporia_. Basidiomata perennial, resupinate to effused-reflex. Pore surface is dingy-yellowish to pale tan to ochraceous. Pores round to angular. Subiculum cream to buff, thin. Tubes concolorous with pore surface, corky. Hyphal system di-trimitic, generative hyphae hyaline,thin-walled, with clamp connections; skeletal hyphae predominant, unbranched, strongly dextrinoid, cyanophilous, rarely dissolving in KOH. Basidiospores ellipsoid, non-truncate, hyaline, thick-walled, smooth, non-dextrinoid, CB+. _Poriella subacida_ ([PERSON]) [PERSON]. [PERSON], comb. nov. Figures 3 and 4. MycoBank: 840062. Basionym: _Polyporus subacidus_ [PERSON], Ann. Rep. N.Y. St. Mus. nat. Hist. 38: 92, 1885. _=Poria subacida_ ([PERSON]) Sacc., Syll. fung. ([PERSON]) 6: 325 (1888). _=Chaetoporus subacidus_ ([PERSON]) Bondartsev & Singer, Annls mycol. 39(1): 51 (1941). _=Oxyporus subacidus_ ([PERSON]) [PERSON], [PERSON]. 3: 13 (1961). _=Peremiporia subacida_ ([PERSON]) [PERSON] 5(1): 76 (1967). _=Poria colorea_ [PERSON]. [PERSON], Bull. Yale Univ. School For. 50: 21 (1942). _=Poria fuscomarginata_ [PERSON]. ex [PERSON] 15(no. 73): 24 (1886). _=Poria subaurantia_ [PERSON]. ex [PERSON], [PERSON] 15(no. 73): 27 (1886). Fruiting body: Perennial, resupinate to effused-reflex, becomes corky when dried, about 22 cm or more at the longest dimension, 15 cm or more at the widest dimension, and up to 17 mm thick at the center. Pore surface pale yellowish to dingy-yellowish when fresh, dingy-yellowish to pale tan to ochaceous when dry; pores round to angular, 4-6 per mm; dissepiments thin, entire. Subiculum thin, cream to buff, up to 1 mm thick. Tubes concolorous with pore surface, up to 16 mm thick. Figure 2: Maximum Parsimony strict consensus tree illustrating the phylogeny of _Poriella subacida_, and related species in _Perennial_s.l. based on the combined ITS+28S+mtSSU+TEF1 sequence datasets. Branches are labeled with maximum likelihood bootstrap higher than 70%, parsimony bootstrap proportions higher than 50% and Bayesian posterior probabilities more than 0.95, respectively. Clade names follow [15]. Hyphal structure: Hyphal system di-trimitic; generative hyphae with clamp connections; skeletal hyphae strongly dextrinoid, CB+; dissolving in KOH. Figure 4: Microscopic structures of _Poriella subacida_ (Holotype). (**a**) Basidiospores. (**b**) Basidia and basidioles. (**c**) Cysidioles. (**d**) Hyphae from drama. (**e**) Hyphae from context. Bars: A = 5 \(\upmu\)m; B–E = 10 \(\upmu\)m.  
Figure 3: Basidiomata of _Poriella subacida_ (Holotype, BPI 844697). Scale bar = 1 cm. Context: Generative hyphae infrequent, hyaline, thin-walled, 2.5-4 um in diameter; skeletal hyphae dominant, thick-walled with a wide lumen, unbranched, subparallel, 3-5.5 um in diameter; skeletal-binding hyphae hyaline, thick-walled, frequently branched, flexuous, interwoven, 1-2 um in diameter. Tubes: Generative hyphae infrequent, hyaline, thin-walled, 2.5-3.5 um in diameter; skeletal hyphae dominant, thick-walled with a wide lumen, unbranched, subparallel, 3-4.5 um in diameter; skeletal-binding hyphae hyaline, thick-walled, frequently branched, flexuous, interwoven, 0.7-1.7 um in diameter. Cystida absent, but fusoidy costidiodes present, hyaline, thin-walled, 13-16 \(\times\) 3-4.5 um. Basidia barrel-shaped, with four sterigmata and a basal clamp connection, 20-22.5 \(\times\) 7-8 um; basidioles similar in shape to basidia, but slightly smaller.