South Florida microfungi: Kalamarospora multiflagellata gen. et sp. nov. (hyphomycetes), with additional new records from USA

Kalamarospora multiflagellata anam. gen. et sp. nov. is described and illustrated from rachides of dead leaves of Sabal palmetto collected in southwestern Florida, USA. The genus is characterized by having obclavate to ellipsoidal conidia internally filled with a mass of subhyaline, septate, 2–3 μm wide filaments growing upward from suprabasal cells at the bottom of the conidia and protruding apically or subapically as long, filiform, subhyaline or hyaline, sometimes 1–2 times dichotomously branched appendages. Conidia are borne on monoblastic, transversely striate, percurrently proliferating conidiogenous cells disposed on macronematous, cylindrical, solitary, unbranched, dark brown to blackish brown conidiophores. The conidial secession is rhexolytic, leaving a distinct, usually truncate frill up to 7 μm long, which remains attached to the basal cell of the conidia. Kalamarospora is compared with anamorphic genera and species having a similar internal conidial organization or morphologically close taxa with appendiculate conidia. Ellisembia britannica, Polytretophora calcarata, Pseudoacrodictys corniculata, Sporidesmiella sinensis, and Triposporium verruculosum are newly recorded from USA.