Neodictyopus atlanticae

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

Etymology: atlanticae (Latin) Atlantic, referring to the species distribution, known to the Atlantic province.

Diagnosis: Basidiomata annual, laterally to eccentrically stipitate, tipically gregariuos, up to four basidiomata in 10 cm of wood; pileus reniform, up to 4.1 cm in diameter and 1.5 mm thick; pilear surface strong brown (7.5YR5/8) to dark reddish brown (2.5YR2.5/4), radially striate, glabrous; margin irregular, wavy and lobed. Pore surface brownish yellow (10YR6/8) to grayish brown (10YR5/2); pores circular 5−9 per mm, (80−)90−170(−180) μm (ave = 121.3 μm, n = 160/4); dissepiments entire to slightly lacerated, 20−90(−100) μm thick, (ave = 48.3 μm, n = 160/4). Tubes concolorous with the pore surface, not stratified, up to 0.5 mm long, decurrent and irregularly attached to the stipe. Context homogeneous, light brown (7.5YR6/4), up to 1 mm thick. Stipe cylindrical, solid, slender, glabrous, longitudinally striated, bearing a black cuticle, up to 2 cm long and 2 mm in diam. Hyphal system dimitic with generative hyphae and skeletal- binding hyphae. Generative hyphae with clamps, hyaline, thin-walled, 1−2.5 μm thick, IKI-, CB-, more easily observed in the tubes. Skeletal-binding hyphae hyaline to yellowish in KOH or water, nondextrinoid to occasionally weakly dextrinoid, CB-. Stipe, context and trama of the tubes composed mainly of skeletal-binding hyphae with a loose arboriform branching pattern (Figures 3B and 4D), up to 350 μm long, 2.5−5 μm wide, thick-walled, geniculated, with a short unbranched stalk (20−90 μm) and then with 2−5 branches (up to 550 μm long) with an alternating arrangement. Skeletal-binding hyphae in the trama (Figure 4E) shorter (80−150 μm) than those at stipe and context, becoming shorter (up to 90 μm) approaching the dissepiments with more (5−9) and shorter ramifications (Figures 3D and 6A). Cystidiole subulate, 14−20 × 4 −5 μm, with a basal clamp. Basidia clavate, 4-sterigmate, 19−21 × 5−6 um. Basidiospore cylindrical, thin-walled, hyaline, smooth, IKI−, CB−, (6.0−)6.5−8.0 × 2.0−3.0 μm, (ave = 6.3 × 2.1 μm), Q = 2−3.5, (ave = 3, n = 160/4).

Index Fungorum Number: IF819631

Notes: Neodictyopus atlanticae is well characterized by lateral to eccentrically stipitate basidiomata, well developed and slender stipe, reniform pileus with irregular, wavy and lobed margin, and the gregarious habit