Dicephalospora

Luo, L., Wei, D. P., Zhao, Q. & Chethana, K. W. Thilini, 2024, Unveiling the Diversity: A Novel Species of Dicephalospora (Helotiaceae, Helotiales) Discovered in China, Phytotaxa 652 (1), pp. 59-68 : 65

A dichotomous key to the species of Dicephalospora

(1) Sessile apothecia.................................................................................................................................................................................2 (1) Stipitate apothecia ..............................................................................................................................................................................5 (2) Receptacle surface with hairs ..................................................................................................................................... D. chrycotricha (2) Receptacle surface without hairs........................................................................................................................................................3 (3) Asci J + .............................................................................................................................................................................. D. calochroa (3) Asci J- ................................................................................................................................................................................................ 4 (4) Disc concave with unbranched paraphyses ......................................................................................................................... D. sessilis (4) Disc slightly convex with branched paraphyses ............................................................................................................ D. irregularis (5) Margin dentate.................................................................................................................................................................... D. dentata (5) Margin not dentate .............................................................................................................................................................................6 (6) Disc cream to yellowish, white apothecia ....................................................................................................................... D. albolutea (6) Disc and apothecia concolorous .........................................................................................................................................................7 (7) Paraphyses with dark pigment contents .............................................................................................................. D. phaeoparaphysis (7) Paraphyses without dark pigment contents ........................................................................................................................................8 (8) Asci J- ................................................................................................................................................................................................9 (8) Asci J + ............................................................................................................................................................................................. 10 (9) Ascospores 4–6-guttulate ..................................................................................................................................... D. pinglongshanica (9) Ascospores 0–2-gutulate ................................................................................................................................ D. xishuangbannaensis (10) Ascospore cap mucilaginous ............................................................................................................................................................11 (10) Ascospore cap non-mucilaginous.....................................................................................................................................................12 (11) Ascospore lemon-shaped, 9−12.7 µm wide ........................................................................................................... D. damingshanica (11) Ascospore fusoid .......................................................................................................................................................... D. rufocornea (12) Ascospores constricted in the middle.............................................................................................................................. D. contracta (12) Ascospores not constricted in the middle.........................................................................................................................................13 (13) Ascospores elliptical-subfusoid............................................................................................................................... D. shennongjiana (13) Ascospores fusoid............................................................................................................................................................................ 14 (14) Disc convex ............................................................................................................................................................... D. inthanonensis (14) Disc flat ........................................................................................................................................................................................... 15 (15) Paraphyses septate ...........................................................................................................................................................................16 (15) Paraphyses aseptate .........................................................................................................................................................................17 (16) Ascospores multiseriate, ectal excipulum globose at the tips .................................................................................. D. huangshanica (16) Ascospores biseriate, 16.5−25.3 × 3.3−3.5 µm .............................................................................................................. D. yunnanica (17) Ascospore width more than 4 µm.................................................................................................................................. D. aurantiaca (17) Ascospore width less than 4 µm.............................................................................................................................. D. chiangraiensis