# Poronidulus

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***Poronidulus*** is a fungal [genus](/source/Genus) in the family [Polyporaceae](/source/Polyporaceae). It is a [monotypic](/source/Monotypic) genus,[1] and contains the single [polypore](/source/Polypore) species ***Poronidulus conchifer***, found in North America. The genus was [circumscribed](/source/Circumscription_(taxonomy)) by American mycologist [William Alphonso Murrill](/source/William_Alphonso_Murrill) in 1904. The generic name, which combines the [Ancient Greek](/source/Ancient_Greek) word πόρος ("pore") with the [Latin](/source/Latin) word *nidulus* ("small nest"),[2] refers to the superficial similarity of the cup-shaped *Poronidulus* [fruit bodies](/source/Basidiocarp) with those of the genus *[Nidularia](/source/Nidularia)*.[3] A second species, *Poronidulus bivalvis*, found in [Bogor](/source/Bogor), was placed in the genus by [Franz Xaver Rudolf von Höhnel](/source/Franz_Xaver_Rudolf_von_H%C3%B6hnel) in 1914.[4] The actual identity of this [taxon](/source/Taxon), however, is uncertain.[5]

## Description

Murrill described the characteristic of genus *Poronidulus* as follows: "Hymenophore annual, tough, sessile, epixylous, at first sterile and cup-like, the fertile portion developing from the sterile; context white, fibrous, tubes short, thin-walled, mouths polygonal; spores ellipsoidal, smooth, hyaline."[3]

The cup-like shape of the fruit bodies allows the spores of the fungus to be disseminated when hit by drops of rain, a dispersal method similar to that of the [bird's nest fungi](/source/Bird's_nest_fungi).[6] *P. conchifer* is inedible.[7]

## References

1. Kirk, P.M.; Cannon, P.F.; Minter, D.W.; Stalpers, J.A. (2008). *Dictionary of the Fungi*. 10th ed. Wallingford, UK: CAB International. p. 558. ISBN 978-0-85199-826-8.

1. Donk, M.A. (1960). ["The generic names proposed for Polyporaceae"](http://www.cybertruffle.org.uk/cyberliber/61056/0001/002/0173.htm). *Persoonia*. **1** (2): 173–302.

1. Murrill, W.A. (1904). ["Polyporaceae of North America"](https://www.biodiversitylibrary.org/page/13175830). *Bulletin of the Torrey Botanical Club*. **31**: 425.

1. von Höhnel, F. (1914). "Fragmente zur Mykologie XVI (XVI. Mitteilung, Nr. 813 bis 875)" (in German). *Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften Math.-naturw. Klasse Abt. I.*. **123**: 84.

1. Justo, Alfredo & Hibbett, David S. (2014). ["Phylogenetic classification of *Trametes* (Basidiomycota, Polyporales) based on a five-marker dataset"](https://www2.clarku.edu/faculty/dhibbett/Reprints%20PDFs/Justo-Hibbett-2011-Phylogen-Classfx-Trametes-Taxon60.pdf). *Taxon*. **60** (6): 1567–1583. [doi:10.1002/tax.606003](https://doi.org/10.1002/tax.606003)

1. Brodie, Harold J. (1951). "The function of the cups of *Polyporus conchifer*". *Science*. **114** (2972): 636. [Bibcode:1951Sci...114..636B](https://ui.adsabs.harvard.edu/abs/1951Sci...114..636B). [doi:10.1126/science.114.2972.636](https://doi.org/10.1126/science.114.2972.636). [PMID 17731929](https://pubmed.ncbi.nlm.nih.gov/17731929)

1. Phillips, Roger (2010). *Mushrooms and Other Fungi of North America*. Buffalo, NY: Firefly Books. p. 320. ISBN 978-1-55407-651-2.

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