Hansfordiellopsis Deighton, Mycol. Pap. 78: 33 (1960).
Index Fungorum number: IF 8425; Facesoffungi number: FoF 12225, 5 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic on host. Sexual morph: Unknown. Asexual morph: Mycelium superficial, composed of olivaceous repent hyphae the cells of which bear lateral hyphopodium-like cells. Conidiophores olivaceous sessile, one per hyphal cell, straight and erect, continuous or rarely uniseptate near the base, terminating in a single truncate conidial scar. Conidia obclavate, smooth, with 3–5 transverse septa and with 1–3 additional oblique septa, olivaceous, the terminal cell attenuated into a rostrum (adapted from Deighton 1960).
Type species: Hansfordiellopsis aburiensis Deighton
Notes: Hansfordiellopsis is characterised by superficial mycelium, composed of olivaceous repent hyphae, olivaceous sessile conidiophores, and obclavate, smooth conidia with 3–5 transverse septa and 1–3 additional oblique septa. Hawksworth (2016) considered Hansfordiellopsis as a synonym of Koordersiella. Hawksworth (2016) regarded the type species of Koordersiella, K. javanica, and the type species of Hansfordiellopsis, H. aburiensis (now considered as a synonym of K. insectivora), to be congeneric. Hawksworth (2016) accepted Koordersiella as a priority name even though Hansfordiellopsis includes eight species while Koordersiella has only five. Rossman et al. (2016) suggested to use Koordersiella Höhn. rather than Hansfordiellopsis Deighton. Wijayawardene et al. (2017, 2020) and Hongsanan et al. (2020b) considered Hansfordiellopsis and Koordersiella as two distinct genera. Molecular data is lacking for Hansfordiellopsis. Fresh collections with DNA sequence data are needed to confirm the taxonomic placement of Hansfordiellopsis.
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