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Danny’s DNA Discoveries – Orbiliomycetes of the PNW
by Danny Miller

Introduction

This class produces tiny stemless cups/discs on wood. that often appear translucent or waxy. When yellow, as they often are, they are easily confused with Calycina ('Bisporella') which are not translucent. When not yellow they are easily confused with many other similar species. They are best recognized by capitate paraphyses. A comprehensive worldwide monograph is available (V1 and V2), but has limited sequencing of types.

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.

Orbiliomycetes

 

The following species are reported here based on microscopy in the Baral monograph for the PNW, but it's not often that they provided sequencing data.

Orbilia angiosubvinosa EU - an unsequenced collection from Acme WA
Orbilia brettii BC - we have the holotype sequence from BC MO 280675
Orbilia canadensis AB - we have an EU sequence of this and an unsequenced collection from BC 400km NE of Vancouver
Orbilia coniferarum UT - an unsequenced collection from ID
Orbilia delphinus CO - an unsequenced collection from ID
Orbilia cf eremaeae Australia - an unsequenced collection from BC (MO 275880) seems to match this description
Orbilia flavida Croatia - unsequenced collections from UBC and Acme WA
Orbilia flexisoma Australia - we have an epitype sequence and an unsequenced collection from BC
Orbilia idahoensis ID - unsequenced
Orbilia macrodelphinus UT - an unsequenced collection from ID
Orbilia maeandrina UT - an unsequenced collection from ID
Orbilia ovalis EU - an unsequenced collection from BC
Orbilia spathulata UT - an unsequenced collection from BC
Orbilia cf subclavuliformis EU - Baral provides a sequence of this and an unsequenced collection from BC (MO 273151) seems to match this description
Orbilia subtrapeziformis EU - an unsequenced collection from Golden BC
Orbilia trapeziformis EU - Baral provides a sequence of this and an unsequenced collection from BC (MO 280444) seems to match this description, but there is no macro photo.
Orbilia vibrioides AZ - an unsequenced collection from BC plus BC collection MO 271912 seems to match this description.
Orbilia xanthostigma Solomon Islands - Baral provides a sequence of this and there is an unsequenced collection from BC (MO 146394)
Orbilia PNW01 - this Orbilia sequence came back when we tried to sequence a Xerocomellus in OR. I don't know which of the above species it might be.
Orbilia PNW02 - this Orbilia sequence came back when we tried to sequence a Mycena in OR. It differs from Orbilia stipitata Thailand by 4 bp in ITS1.

Orbilia brettii holotype, unsequenced O. cf. eremaeae, and unsequenced O. cf. subclavuliformis © A and O Ceska

unsequenced O. cf. vibrioides and O. cf. xanthostigma © A and O Ceska,     capitate paraphyses © Danny Miller

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