Fungalpedia – Note 191 Didymoporisporonites (Fossil Fungi)


Didymoporisporonites Sheffy & Dilcher emend. Kalgutkar & Jansonius 

Citation when using this data: Saxena RK & Hyde KD. 2024 (in prep) – Fungalpedia, Fossil Fungi. 

Index Fungorum, Facesoffungi, MycoBankGenBankFig. 1

Classification: Didymosporae, Fossil Fungi.

Sheffy & Dilcher (1971instituted Didymoporisporonites from the Claiborne Formation (Middle Eocene, 4738 mya) of Puryear clay pit, Tennessee, Henry County, USA. According to the original diagnosis, Didymoporisporonites includes dicellate, uniseptate spores with a pore at the apex of one cell and psilate to punctate and variably sculptures the spore wall. Kalgutkar & Jansonius (2000emended the generic diagnosis to restrict it to include dicellate spores with dissimilar cells (with smaller cell porate). The dicellate conidia are generally small to medium-sized, having thinner-walled proximal cells and smaller than the distal one and with a distinct pore or hilum. There are 25 records in Index Fungorum (2023) under this genus.

Type species: Didymoporisporonites psilatus Sheffy & Dilcher.



Figure 1 – Didymoporisporonites psilatusScale bar = 20 μm. Redrawn from Sheffy & Dilcher (1971).



Kalgutkar RM, Jansonius J. 2000 – Synopsis of fungal spores, mycelia and fructifications. AASP Contribution Series 39, 1–423

Sheffy MV, Dilcher DL. 1971 – Morphology and taxonomy of fungal spores. Palaeontographica Abt. B 133(1-3), 34–51.


Entry by

Ramesh K. Saxena, Birbal Sahni Institute of Palaeosciences, Lucknow, India


(Edited by Kevin D. Hyde, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka