Longididymella vitalbae (Briard & Har.) L.W. Hou, L. Cai & Crous, comb. nov.
MycoBank number: MB 833505; Index Fungorum number: IF 833505; Facesoffungi number: FoF 11513;
Basionym: Ascochyta vitalbae Briard & Har., Rev. Mycol. (Toulouse) 13: 17. 1891.
Synonyms: Diplodina vitalbae (Briard & Har.) Allesch., Rabenh. Krypt.-Fl., ed. 2. Pilze 6 (Lief. 69): 683. 1900 (vol. dated1901). Diplodina clematidina Fautrey & Roum., Rev. Mycol. (Toulouse) 14: 105. 1892. Didymella vitalbina Petr., Ann. Mycol. 38: 348. 1940.
Description: Woudenberg et al. (2009).
Typus: Switzerland, Gampel-Steg, on leaves of C. vitalba, 10 Oct. 1991, A.G. Spiers, epitype of Didymella vitalbina PDD69378, ex-epitype living culture ICMP 13663 = AGS 9 = PD 97/13460-2 = CBS 123707.
Additional materials examined: France, Var, Jouques, on leaves of Clematis vitalba (Ranunculaceae), Dec. 1964, E. Müller, specimen CBS H-11972, culture ETH 2672 = CBS 454.64. Germany, Alf a. d. Mosel, on leaves of C. vitalba, 3 Oct. 1987, H.A. van der Aa, specimen CBS H-16192, culture CBS 911.87. The Netherlands, Renkum, Jufferswaard, on leaves of C. vitalba, 9 Apr. 2008, J. de Gruyter, culture CBS 123706.
Notes: The holotype of Didymella vitalbina (basionym: Ascochyta vitalbae) was originally isolated from Clematidis vitalbae in Gaisberg, Austria (Petrak 1940). Woudenberg et al. (2009) designated CBS 123707 as ex-epitype for this species based on its similar morphological characters. In this study, Did. vitalbina was represented by five strains including the ex-epitype (CBS 123707), which together with the ex-type strain of Did. clematidis (CBS 123705), formed a fully supported independent lineage that was distinct from its closest genus Ectophoma. Therefore, Longididymella was proposed as a new genus to accommodate these two species.