Groveolopsis Boedijn, Sydowia 5(3-6): 351 (1951)
Dothideomycetes, Pleosporomycetidae, Pleosporales, Acrocalymmaceae
Parasitic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata black, pycnidial, solitary to gregarious or confluent, immersed, globose or oval to irregular, unilocular, thick-walled, glabrous, ostiolate. Ostiole short, circular to oval, centrally located. Conidiomatal wall composed of thick-walled, brown to hyaline cells of textura globulosa to textura prismatica. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, enteroblastic, phialidic, ampulliform to subcylindrical, smooth, arising from the inner wall layers of conidiomata. Conidia hyaline, obclavate, narrow and truncate at base, attenuated towards the apex, 0–1-septate, smooth, guttulate, bearing a cup-like or irregular, mucoid, apical appendage.
Notes: Wijayawardene et al. (2017a) estimated that there are six species in Groveolopsis, but they did not provide any details on species names. Groveolopsis remains monotypic (Morgan-Jones 1977, Sutton 1980, Nag Raj 1993, Index Fungorum 2019, MycoBank 2019). A collection made during the present study (MFLU13–0309) shares similar morphology of conidiomata and conidial dimensions with Groveolopsis pandani, and therefore, it is regarded as conspecific with the type species.
Based on a blast search of NCBIs GenBank nucleotide database, the closest hits using the ITS sequence had highest similarity to Acrocalymma vagum voucher INBio:483A (GenBank KU204582.1; Identities = 371/405(92%), 12/405(2%), A. fici BR68 (GenBank MN637807.1; Identities = 372/406(92%), 15/406(3%), Acrocalymma sp. LS83 (GenBank MK715136.1; Identities = 370/404(92%), 11/404(2%)), and A. medicaginis G838 (GenBank MK247909.1; Identities = 370/404(92%), 11/404(2%)). As other sequences (e.g., LSU, SSU) are not available for G. pandani. Groveolopsis is temporarily placed in Acrocalymmaceae (Pleosporales) based on ITS sequence data. Groveolopsis is similar to Acrocalymma in having pycnidial conidiomata produced hyaline conidia with flared mucoid apical and basal appendages (Trakunyingcharoen et al. 2014). However, Groveolopsis has obclavate, 0–1-septate conidia, which differ from Acrocalymma in that conidia are cylindrical to fusoid, 0–3-septate. To fix the genetic concept of Groveolopsis, fresh collections of G. pandani from its original location will have to be epitypified.
Distribution: Indonesia, Thailand (Sutton 1980, this study).
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.