Fungalpedia – Note 504, Pseudorhizidiaceae
Pseudorhizidiaceae Doweld
Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Chytridiomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Chytridiales, Chytridiomycetidae, Chytridiomycetes, Chytridiomycotina, Chytridiomycota, Fungi
Pseudorhizidiaceae was introduced by Doweld (2014). This family is characterized by a unique morphology with a monocentric thallus, eucarpic, endogenous, and interbiotic. The sporangia are oval to spherical with multiple inoperculate discharge pores. Rhizoids branch from a single main rhizoidal axis with finely divided tips. The resting spores were spherical and epibiotic. Zoospores are spherical and posteriorly uniflagellate, with solitary to multiple lipid globules. Simple cisternae and microbodies covering lipid globules (Powell et al. 2013). The endoplasmic reticulum traverses ribosomal aggregates, the nucleus is partially embedded in ribosomal aggregates, and microtubules are not organized into roots. The flagellar plug is composed of two layers. Paracrystalline inclusions, globular kinetosome-associated structures, and cell coats are present (Powell et al. 2013, Doweld 2014).
Type genus: Pseudorhizidium M.J. Powell, Letcher & Longcore
Other accepted species: Species Fungorum – search Pseudorhizidiaceae
Figure 1 – Pseudorhizidium endosporangiatum (JEL 221). a, b At early stages of development, sporangia ranged from spherical to obpyriform. c, d Thick-walled resting spores with a large lipid globule and scattered small globules grew epibiotically on pollen. Redrawn from Powell et al. (2013).
References
Doweld AB. 2014 – Nomenclatural novelties. Index Fungorum 81, 1-1.
Entry by
Premarathne BM, National Institute of Fundamental Studies (NIFS), Hantana, Kandy 20000, Sri Lanka
(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)
Published online 9 December 2024