Polyporales » Polyporaceae

Neodictyopus

Neodictyopus Palacio, Robledo, Reck & Drechsler-Santos 2017, in Palacio et all., Plos one, 12(10), e0186183 (2017).

Etymology: neo (Lat.): new; dictyopus (Gre.): reticulate stipe surface of Polyporus dictyopus s.l.; the new dictyopus, in reference to the recognition of a new genera segregated from P. dictyopus complex.

Diagnosis: Basidiomata annual, lateral to eccentrical, rarely centrally stipitate; pileus reniform to flabelliform; pilear surface glabrous, radially striate, dark reddish brown; margin irregular, wavy, and lobed to decurved and entire. Pores circular. Context homogenous, yellow to light brown. Stipe cylindrical, solid, reticulated to longitudinally striate, bearing a black cuticle (Figures 2A, 2B, 2C and 2D). Hyphal system dimitic; generative hyphae clamped, hyaline, thin-walled, branched skeletal-binding hyphae dominating, arboriform, hyaline, IKI− to slightly dextrinoid (only in mass) in the trama of the tubes. Basidia clavate, 4-sterigmate. Basidiospores subcylindrical to bacilliform, thin-walled, smooth, hyaline, IKI- (Figures 3B, 3D, 3G, 3H, 4D, 4E, 4F1, 4F2, 4F3 and 4F4).

Index Fungorum Number: IF819629

Type Species: Neodictyopus atlanticae Palacio, Robledo & Drechsler-Santos 2017 in Palacio et all., Plos one, 12(10), e0186183 (2017).

Notes: Neodictyopus is characterized by its subcylindrical to bacilliform basidiospores, reniform to spatulate pileus, and skeletal-biding hyphae of arboriform type, slightly dextrinoid (when in mass) in the trama of the tubes. So far, the genus is neotropical (Figures 5C, 5D and 5E), but probably pantropical, since some specimens from the Paleotropics clustered together with the Neodictyopus clade. All the species grow on dead wood, typically dead fallen branches of relatively thin diameter (up to 10 cm diam) and produce white rot on the substrate. Neodictyopus is morpholically similar to other Polyporus species; however, P. tuberaster, the type species of Polyporus, has fleshy basidiomata when fresh, and pileus upper surface whitish to ochraceous covered with scales. Macroscopically, Neodictyopus is more similar to Atroporus, but the ellipsoid to subcylindrical basidiospores and strongly dextrinoid skeletal-biding hyphae from the trama of the tubes are unique to latter.

Species:

Neodictyopus atlanticae Palacio, Robledo & Drechsler-Santos 2017

Neodictyopus dictyopus (Mont.) Palacio, Robledo & Drechsler-Santos 2017

Neodictyopus gugliottae Palacio, Grassi & Robledo 2017

Neodictyopus sylvaticus Toapanta-Alban, Ordoñez & Blanchette 2021

 

 

Reference:

Palacio, M., Robledo, G. L., Reck, M. A., Grassi, E., Góes-Neto, A., & Drechsler-Santos, E. R. (2017). Decrypting the Polyporus dictyopus complex: Recovery of Atroporus Ryvarden and segregation of Neodictyopus gen. nov. (Polyporales, Basidiomyocta). Plos one, 12(10), e0186183.

 

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