Jamesdicksonia anadelphiae

Denchev, Teodor T. & Denchev, Cvetomir M., 2016, Jamesdicksonia anadelphiae-trichaetae (Georgefischeriales) and Sporisorium anadelphiae-trichaetae (Ustilaginales), new species on Anadelphia trichaeta (Poaceae) from Guinea, Phytotaxa 252 (3), pp. 205-216 : 206-208

Jamesdicksonia anadelphiae (Vienn.-Bourg.) Piątek, Phytotaxa 192: 45, 2015. ( Figs 1–10 )

Basionym: Entyloma anadelphiae Vienn. -Bourg., Bull. Soc. Bot. France 104: 273, 1957.

Type: —On Anadelphia pumila Jacq. -Fél. ( Poaceae ). GUINEA. Kindia Region: Foulaya near Kindia, wet sandstone, January 1957, leg. G. Viennot-Bourgin (holotype, PC; isotype, H. U. V. 13 669!).

Sori in leaves and spatheoles, covered by the epidermis, forming flat, lead-colored streaks or patches, limited by veins, 0.5–11.0 × 0.1–0.5 mm, amphigenous, non-erumpent. Spore mass blackish brown, agglutinated to semi-agglutinated. Spores embedded in leaf tissue, packed in elongated or irregular groups, sometimes single, subglobose, broadly ellipsoidal, subpolygonal, ovoid or slightly irregular, (9–)9.5–15.5(–18.5) × (7.5–)8.5–12.5(–14.5) (12.9 ± 1.7 × 10.8 ± 1.2) μm (n = 200), medium olivaceous brown, sometimes with an appendage ( Figs 7, 8 ); wall two-layered, 1.2–3.0(–3.8) μm thick; inner layer evenly thickened, 0.4–1.0 μm thick, slightly lighter in color than the outer layer ( Figs 5, 6 ), sometimes difficult to be seen; outer layer (as seen by LM) sometimes laminated, with up to 3(–4), hardly distinguishable layers ( Figs 5, 6 ), smooth. In SEM rugulose.

Specimen examined: — Isotype ( H. U. V. 13 669).

Known host and distribution: —On Poaceae : Anadelphia pumila , Africa ( Guinea) (Fig. 11). Known only from the type collection.

Figures

FIGURES 1–10. Jamesdicksonia anadelphiae on Anadelphia pumila (isotype, H.U.V. 13 669). 1, 2. Habit. 3–8. Spores in LM. In Figs 5 and 6, white arrows indicate inner layer, black arrows indicate laminated outer layer. Black arrows in Figs 7 and 8 show appendages. 9, 10. Spores in SEM. Scale bars: 1, 2 = 0.5 cm, 3–8 = 10 μm, 9 = 2 μm, 10 = 5 μm. FIGURE 11. Geographic distribution of Jamesdicksonia anadelphiae (blue rectangle), J. anadelphiae-trichaetae (green semicircle), Anthracocystis anadelphiae (yellow rectangle), Sporisorium anadelphiae-trichaetae (red semicircle),Macalpinomyces elymandrae (brown triangle),Tilletia elymandrae (lilac square),and Sporisorium monocymbii (orange circle).