Camposporium marylandicum Shearer
Index Fungorum number: IF 310208
Holotype: ILLS 35538
Sexual morph: Undetermined. Asexual morph: Mycelium immersed or superficial on balsa wood, colonies appearing as hyaline tufts becoming yellow with age. Hyphae septate, hyaline, light brown when older. Conidiophores macronematous, mononematous, hyaline, simple or branched, erect, straight to irregularly bent, 0–5 septate, (41–)69(–127) × (2–)2.8(–3) µm, tapering to 2 µm at the apex, arising as lateral, erect branches from repent hyphae. Conidiogenous cells terminal, integrated, sympodial, polyblastic, denticulate; each denticle a narrow stalk which breaks from the conidiogenous cell with the secession of the conidium. Conidia (24.7–)33 (–44) × (4.5-)4.7(–6.5) µm, holoblastic, acropleurogenous, hyaline, 5–10-septate, cylindrical to cylindric-fusoid, tapering to a rounded apex and truncate base which usually bears the remains of a denticle. Conidial apex often elongated to form a long filiform appendage 33.5–80 × 0.5–1 µm.
Specimens examined: On balsa wood submerged in the Patuxent River, Patuxent Wildlife Refuge, Laurel, Md., June 6, 1969, Shearer CS-176; May 22, 1969, Shearer CS-176-1; Feb. 2, 1970, Shearer CS-176-2.
Freshwater distribution: USA (Shearer 1974)
Photographic plates: https://www.tandfonline.com/doi/abs/10.1080/00275514.1974.12019568
Shearer CA (1974) Fungi of the Chesapeake Bay and its tributaries IV. Three new species from the Patuxent River. Mycologia 66:16–24. https://doi.org/10.1080/00275514.1974.12019568