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, MycoBank, GenBank, Fig. 1

Classification: Didymosporae, Fossil Fungi.

Sheffy & Dilcher (1971) instituted Didymoporisporonites from the Claiborne Formation (Middle Eocene, 47–38 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 (2000) emended 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 psilatus. Scale bar = 20 μm. Redrawn from Sheffy & Dilcher (1971).

 

References

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)  

Published online 31 January 2024

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