© Lauren Ré

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Danny’s DNA Discoveries – Resupinatus of the PNW (Marasmiineae)
by Danny Miller

Introduction

Resupinatus is currently thought to be in an unknown family in the Marasmiineae sub-order, which probably means it needs its own family designation as it has not yet been shown to be close enough to any other existing family. They are very small pleurotoids (a few mm across) that are grey to black in colour usually with a completely absent stem. They are usually separated from some very similar tiny Hohenbuehelia by their lack of metuloid cystidia, although, unfortunately, one species does have metuloids and is therefore very difficult to separate from Hohenbuehelia. The Resupinatus species have more closely spaced gills than the Hohenbuehelia species.

abundant common uncommon rare - colour codes match my Pictorial Key and are my opinions and probably reflect my bias of living in W WA. Rare species may be locally common in certain places at certain times.

Click here to download the FASTA data of all my DNA sequences

Resupinatus

Resupinatus sp. "black, round spores" - a black capped, round spored species, with closely spaced gills that appears to stain black. It has gone by the names Resupinatus applicatus EU and Resupinatus striatulus EU but we have both of those type sequences, and so far, three PNW collections sequence to be an unnamed species and neither of those. If you think you find either R. applicatus or R. striatulus instead, save it, otherwise I am going to assume that neither species is actually here.

Resupinatus niger EU - also with closely spaced dark gills, but with elliptical spores and metuloids, this is easily mistaken for species of Hohenbuehelia, especially Hohenbuehelia unguicularis which also has dark gills, but those are more widely spaced, and the Resupinatus will not eat nematodes (but that is a difficult test to make). We have type sequences of both R. niger and all the Hohenbuehelia reported from the PNW, but no local collections to find out what our elliptical spored, metuloid species really are. See Hohenbuehelia for more details.

Resupinatus sp. "black, round spores" © Lauren Ré

 

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