Polycoccum clauderouxii is similar to P. clauzadei, but differs in having larger galls on host thalli (0.5-1.5 mm vs. (0.2-)0.4-0.8 mm diam./across), in having 8-spored (vs. 4-6-spored) asci, and in having longer and narrower ascospores ((16-)18-20(-21) x 6-7 [micro]m vs. 15-18.5(-19.5) x (6.5-)7-9(-9.5) [micro]m), as well as in having different host (Zeroviella laxa vs. Rusavskia elegans).
Furthermore Polycoccum clauderouxii differs from P. pulvinatum, in having different hosts (Zeroviella laxa vs. Physcia spp.), in having smaller galls on host thallus (0.5-1.5 mm vs. (0.5-)1-3 mm diam./across), in having smaller ascomata (120-180 [micro]m vs. 150-300 [micro]m diam./across), in having 8-spored (vs. (4-)8-spored) asci, and in having narrower ascospores ((16-)18-20(-21) x 6-7 [micro]m vs. 14-21 x 6-9 [micro]m) (Navarro-Rosines and Roux 1998).
It is interesting that Rusavskia elegans, the host of a gall-forming lichenicolous fungus Polycoccum clauzadei, and Zeroviella laxa, the host of a similar (to latter) gall-forming lichenicolous fungus Polycoccum clauderouxii are members of the same Rusavskia clade of the subfamily Xanthorioideae of the Teloschistaceae. The genus Zeroviella was recently segregated from the genus Rusavskia on the basis of three gene phylogeny (Kondratyuk et al. 2015c). Finding of different lichenicolous fungi on member of these two genera, i.e. Rusavskia and Zeroviella, is additional confirmation that these lichen groups are quite different. Furthermore, Zeroviella laxa was recently erected to the species level also (Kondratyuk et al. 2015c).
Psoroglaena coreana S. Y. Kondr., L. Lokos et J.-S. Hur, spec. nova
(Fig. 15)
Mycobank no.: MB 817979
Similar to Psoroglaena japonica, but differs in having more or less continuous thallus, in having hyaline and smaller perithecia, in having larger algal cells, in having hyaline and thinner exciple, in having wider periphyses, in having lower hymenium, in having 1-3-septate, and longer and wider ascospores.
Type: Republic of Korea, Gyeongsangbuk-do, Ulleung-do Island, Ulleung-gun, Seomyeon, Taeha-ri, valley of Tae-hacheon, Seodal-gil, near Bogho waterfall, on beton kerb, growing together with Bacidina egenula, and Verrucaria sp. Lat.: 37[degrees] 30' 14.09" N; Long.: 130[degrees] 50' 07.83" E; Alt.: 370 m a.s.l. Coll.: Kondratyuk, S. Y. and Lokos, L. (161845), 10.07.2016 (holotype: KoLRI 040045 sub Bacidina egenula).
Thallus crustose, continuous, green or greenish grey, perithecia as whitish or yellow-whitish tips, to 0.1-(0.2) mm in diam. seen. Thallus in section to 50 [micro]m thick, continuous crust, no goniocysts observed. Algae 7-14 [micro]m in diam.
Perithecia to (110-)120-180(-220) [micro]m in diam. and to 150-190 [micro]m high in section, immersed in substratal rocks only at base, subglobose to globose, ellipsoidal or pyriform, algal layer at the lower half of exciple to 25-35 [micro]m thick, continuous (not goniocystal type). Exciple to (12-)17-25(-35) [micro]m thick in lower portion, while to 25-50(-60) [micro]m thick at the ostiole, pseudoparenchymatous, cell lumina of 5 [micro]m; hyaline throughout or at the ostiole somewhat pinkish or yellowish; periphyses (8-)15-25(-40) [micro]m long and (1.5-)2-3 [micro]m wide; hymenium to 70-80 [micro]m high; asci 8-spored, (50-)60-75 x 11-13 [micro]m; ascospores 1-3-septate, central septum is somewhat curved (not straight or even) often with oil droplets, slightly wider when bent, (16-)18-22 x (5-)5.5-6.5(-7.5) [micro]m. Conidiomata and conidia...