Ely (Fig. ten). The polyphialides formed by these two species don’t show as quite a few conidiogenous loci as do those of F. echinatum. Fusarium prieskaense G.J. Marais Sand.-Den., sp. nov. MycoBank MB 838661. Fig. 24. Etymology: Referring to Prieska, a town in Northern Cape Province, South Africa, exactly where the sort was collected. Typus: South Africa, Northern Cape Province, Prieska, on Prunus spinosa, 2010, F.J.J. van der Walt G.J. Marais (holotype CBS H-24660, culture ex-type CBS 146498 = CPC 30826 = CAMS 001176).Conidiophores on aerial mycelium 12.53.five m tall, unbranched or rarely irregularly or sympodially branched and proliferating, bearing terminal single phialides or whorls of 2 phialides, normally lowered to solitary conidiogenous cells borne laterally on hyphae; aerial conidiogenous cells mono- and polyphialides, subulate to subcylindrical, smooth- and thin-walled, 89.five 2 m, polyphialides frequently with 2 conidiogenous openings, periclinal thickening and PI3K review collarettes frequently inconspicuous or absent. Aerial microOpioid Receptor Accession conidia forming tiny false heads and short chains on phialide strategies, hyaline, obovoid to short clavate, smooth and thin-walled, 0-septate, (four.5 six(3) 2() m (av. 7.4 2.six ). Sporodochial conidiophores 24.59(5) m tall, irregularly branched, bearing terminal solitary or whorls of two phialides. Sporodochial conidiogenous cells monophialidic, doliiform, subulate to subcylindrical, smooth- and thin-walled, (eight.5 104(5) two.5 m. Sporodochial conidia straight to moderately curved and slender, tapering towards the basal component, apical cell a lot more or significantly less equally sized as the adjacent cell, blunt to slightly hooked; basal cell well-developed, foot-shaped, seldom papillate, (13-septate, hyaline, thin- and smooth-walled: 1septate conidia: 23.5 three.5 m; 3-septate conidia: (33.five 44.58(8.5) (33.five.5() m (av. 51.1 4 m); 4septate conidia: (52.555.57.5(1) three.5.5 m (av. 61.3 four.1 m); general: (23449(1) three() m (av. 51.3 four m). Chlamydospores not observed. Culture qualities: Colonies on PDA reaching 428 mm diam at 25 just after 7 d. Surface pale luteous, luteous to pale sienna, flat, velvety to felty, sometimes with small white patches of aerial mycelium, margin filiform and typical. Reverse sulphur yellow to amber, pale orange at centre. On OA, sienna to pale umber, flat, membranous to dusty, margin complete and frequent; reverse sienna to pale umber.Additional material examined: South Africa, Northern Cape Province, Prieska, on Prunus spinosa, 2010, F.J.J. van der Walt G.J. Marais, culture CBS 146499 = CPC 30827 = CAMS 001177; on Aloidendron dichotomum, 2010, F.J.J. van der Walt G.J. Marais, culture CPC 30825 = CAMS 001175.Notes: Fusarium prieskaense is nested within the core African clade of the FFSC (Fig. 11). Equivalent to most members of this clade, this species is characterised by forming mostly monophialides and occasional to frequent polyphialides, at times proliferating and making aerial conidia typically organised in a mixture of false heads and brief to lengthy chains. Fusarium prieskaense is morphologically and phylogenetically associated to Fusarium brevicatenulatum and F. pseudonygamai from which it may be differentiated by its pale luteus to yellow colony pigmentation on PDA, versus the orange to dark blue or violet pigments made by the two latter species (Leslie Summerell 2006). Furthermore, sporodochia and macroconidia are generally and abundantly created by F. prieskaense, whereas these structures are somewhat rare in the two aforementione.
