42 R.F.CASTAN  EDA RUI  Z, 1 J.GUARRO 2 AND E.MAYAYO 2  Instituto de Investigaciones Fundamentales en Agricultura Tropical ‘ Alejandro de Humboldt ’(INIFAT) calle 1, esq. 2, Santiago de Las Vegas, C. Habana, Cuba  Unitat de Microbiologia, Facultat de Medicina i Cie  ncies de la Salut, Universitat Rovira i Virgili, 43201 Reus, Tarragona, Spain Enridescalsia gen. nov., characterized by synchronous, polytretic conidiogenous cells and brown euseptate conidia, is described and illustrated from submerged, decaying leaves of Terminalia cattapa from Cuba. Notes on similar genera are given. During studies of microfungi from Cuba an interesting hyphomycete was collected from decaying submerged leaves of Terminalia cattapa. The fungus was obtained in pure culture and a careful examination of its morphological characteristics showed remarkable differences from previously described hyphomycetes ; it is described as a new genus. Enridescalsia R. F. Castan  eda & Guarro, gen. nov. Etym. : Latinized from the name of the Spanish mycologist Dr Enrique Descals Ad fungus conidiales, hyphomycetes pertinens. Coloniae effusae, brunneae. Mycelium partim superficiale et partim in substrato immersum. Conidiophora macronematosa, mononematosa, septata, brunnea vel olivacea. Cellulae conidiogenae polytreticae, simultaneae, terminales, cum minutis poris manifestis praeditae. Conidia cylindrica, fusiformia usque obclavata, septata, brunea, laevia vel verrucosa, non catenata. Teleomorphosis ignota. Species typica : Enridescalsia speciosa R. F. Castan  eda & Guarro. Conidial fungi, hyphomycetes. Colonies spreading, brown. Mycelium superficial and immersed. Conidiophores differentated, mononematous, septate, brown to olivaceous. Conidiogenous cells polytretic, synchronous, terminal, with small but con- spicuous pores. Conidia cylindrical, fusiform to obclavate, septate, brown, smooth or verrucose, not in chains. Teleomorph unknown. Type species : Enridescalsia speciosa. Enridescalsia speciosa R. F. Castan  eda & Guarro, sp. nov. (Figs 1–3) Etym. : from the Latin, speciosa  beautiful, fine Ad fungus conidiales, hyphomycetes pertinens. Coloniae effusae, amphigenae, brunneae. Mycelium partim superficiale et partim in substrato immersum. Hyphae septatae, ramosae, leaves, brunneae, 2–3 μm diam. Conidiophora macronematosa, mononematosa, cylindrica, 5–9-septata, plerumque prostrata interdum erecta, recta vel fluxuosa, non ramosa, 240–8503–6 μm, laevia, brunnea vel olivacea. Cellulae conidiogenae polytreticae, simultaneae, inflatae plus minusve capitatae, 16–3510–15 μm, terminales, determinatae, brunneae, cum 6–10 minutis poris, 05 μm diam., manifestis praeditae. Conidia cylindrica, fusiformia usque obclavata, constricta ad septa, moniliformia, rotundata ad apicem, truncata, attenuata, interdum leviter uncinata ad basim, 175–27517–22 μm, 7–10-septata, brunnea, laevia, non catenata. Teleomorphosis ignota. In foliis dejectis Terminaliae cattapae submersae in fluvio, Holguin, Cuba, 6 Dec. 1995, R. F. Castan  eda, INIFAT C9596 holotypus, MUCL isotypus. Conidial fungi, hyphomycetes. Colonies spreading, amphi- genous, brown. Mycelium superficial and immersed. Hyphae septate, branched, smooth-walled, brown, 2–3 μm wide. Conidiophores differentiated, mononematous, cylindrical, 5–9- septate, mostly prostrate, but sometimes erect, straight or flexuous, unbranched, 240–8503–6 μm, smooth, brown to olivaceous. Conidiogenous cells polytretic, synchronous, inflated, more or less capitate, 16–3510–15 μm, terminal, deter- minate, brown, with 6–10, small but conspicuous pores, 05 μm diam. Conidia cylindrical, fusiform to obclavate, 7–10- septate, constricted at septa and appearing moniliform, rounded at the apex, tapered and sometimes slightly hooked at the base, 175–27517–22 μm, brown, smooth-walled, not in chains. Teleomorph unknown. Colonies on corn meal agar (Difco) supplemented with 5 g malt extract (Merck) at 25 C attaining 22–28 mm diam. in 10 d, olivaceous to brown, aerial mycelium velvety, with indeterminate margin. Hyphae pale brown, smooth-walled, 15–30 μm wide. Conidiophores differentiated, mononematous, 200–4006–9 μm, cylindrical, pale brown to brown, smooth. Conidiogenous cells polytretic, sychronous, inflated, brown, 22–4075–85 μm, with 2–7 small but Mycol. Res. 102 (1) : 42–44 (1998) Printed in the United Kingdom Enridescalsia, a new genus of conidial fungi from submerged leaves in Cuba