Muyocopronales » Muyocopronaceae


Muyocopromyces G. Worobiec, in Worobiec et al., Fungal Biology 124: 840 (2020).

Index Fungorum number: IF 836231; Facesoffungi number: FoF 11965, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Sexual morph: Unknown. Asexual morph: Sporodochial conidiomata flattened, ± roundish, non-ostiolate, solitary, margin usually crenate. Central cell triangular, from which radiating rows of cells extend outward (textura prismatica), cells more elongated towards the periphery. Only peripheral cells conidiogenous with a single pore (¼ conidiogenous locus, aperture). Pore slightly elevated (forming collarette), always oriented centrifugally (adapted from Worobiec et al. 2020).

 Type species: Muyocopromyces quilonensis (K.P. Jain & R. Gupta) G. Worobiec

Notes: Muyocopromyces is characterised by flattened, ± roundish, non-ostiolate sporodochia, with a triangular central cell, elevated pore. Jain and Gupta (1970) described the fossil species Callimothallus quilonensis from Miocene deposits of Padappakkara, Quilon, Western Ghat, Southern India. Jain and Kar (1979) found comparable fossil sporocarps which they mentioned as “Microthyriaceous germlings” from Quilon and Varkala, Kerala Coast, Southern India. Saxena (2000) reported similar species which he termed as Phragmothyrites eocaenica from the Sindhudurg Formation, Maharashtra, India. Jain and Gupta (1970) and Kalgutkar and Jansonius (2000) reported that C. quilonensis is similar to C. pertusus but different in having only porate peripheral cells. Worobiec et al. (2020) however did not agree and provided a detailed morphological appraisal of C. quilonensis and C. pertusus. In Callimothallus pertusus, pores occur in almost all cells and are positioned centripetally while in C. quilonensis the pores in the cells are unvaryingly located centrifugally and occur in the outmost row of cells of the sporodochium (Worobiec et al. 2020). Callimothallus pertusus has pore walls somewhat raised in a collarette while in C. pertusus (= Neomycoleptodiscus pertusus), the pores lack collarette. C. quilonensis resembles members of Muyocopron (e.g. M. freycineticola, M. brasiliensis) in having centrifugal orientation of pores found in peripherial cells (Hernandez-Restrepo et al. 2019; Worobiec et al. 2020). Muyocopromyces quilonensis, likewise Neomycoleptodiscus pertusus, are separate fossil ancestor of the active species of the family Muyocopronaceae with taxa morphologically similar to Mycoleptodiscus s. lat.. Remnants of M. quilonensis were found only from Neogene deposits of India (Worobiec et al. 2020). Callimothallus quilonensis resembles sporodochia of ‘‘living multiporate epiphyllous shields” of fungi from the Australasian region whereby pores are located centrifugally and found only in remotest row of cells but differs from M. quilonensis in having higher number of cells (Worobiec et al. 2020). Muyocopromyces is a distinct genus in Muyocopronaceae.



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