Fungalpedia – Note 514, Paramicrosporidium
Paramicrosporidium D. Corsaro, Walochnik, D. Venditti, J. Steinm., K.-D. Müll. & R. Michel
Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Protozoa.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Rozellidae, Rozellida, Incertae sedis, Rozellidea, Paramycia, Choanozoa, Protozoa.
Corsaro et al. (2014) proposed a new name Paramicrosporidium for their tendonuclear parasites, which are microsporidia-like rozellids, based on the small subunit ribosomal RNA gene (SSU or 18S ribosomal DNA (rDNA)). The name is proposed to avoid further confusion and to respect name priority for the two distinct strains “Amoebosporidia Schneider 1884” and “Amoebosporidium polyphagum Bonome 1895,” which are one of the many synonyms of different species. Currently, Paramicrosporidium has two species, P. saccamoebae (type) and P. vannellae, which are identified based on gene sequences (18S rDNA) and natural amoebal hosts. However, this generic name is not currently considered for application to organisms within the fungal clade (Corsaro et al. 2014).
Type species: Paramicrosporidium saccamoebae D. Corsaro, J. Walochnik, D. Venditti, J. Steinmann, K.-D. Müller & R. Michel
Other accepted species: Species Fungorum – search Paramicrosporidium
Figure 1 – Ultrastructure of the amoebae endoparasites. a Overview of Paramicrosporidium saccamoebae with the nucleus filled. b Pleomorphic merogonic stages within the amoeba nucleus. c Ultrastructure of spore (rounded or ovoidal spores inside the karyoplasm, showing exospore and endospore layers, a prominent nucleus, and internal structures interpreted as anchoring disc and irregular coiled polar filament). d Two spores inside separate cytoplasmic vacuoles of Vannella, migrating toward the host nucleus (arrows point to nuclear membrane). e Spores from Vannella. Scale bars: a, b = 2 μm ; c-e = 1 μm. Redrawn from Corsaro et al. (2014).
Reference
Entry by
Lu W, Excellence Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China
(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)
Published online 9 December 2024