Collection_#: OMS 300603
Collector: Sen Dwe
Identifier: David Arora, suggested as a possibility via facebook
Substrate: wood
Other: gray brown when collected, not blue. fused base; name Albatrellus skamanius suggested David Arora

Species Lists


Copyright © 2017 Sen Dwe
Copyright © 2017 Sen Dwe
OMS 300603.jpg
Copyright © 2017 Joseph D. Cohen (Joe Cohen)
Number tag. There was no collection slip.

Proposed Names

-11% (4)
Used references: based on sequence match
64% (4)
Recognized by sight: Decent match for some sequences labelled as this. At least definitely in the same family. Decent morphological fit.
Used references: BLAST

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
Thanks for the correction
By: Joseph D. Cohen (Joe Cohen)
2018-02-02 13:39:49 CST (-0500)

Thanks for fixing that.
Unfortunately, there was no collection slip. We assigned it the number OMS 300603 to help track it. I’ll add a photo to help clarify that.
- Joe

Found by Sen Dwe
By: Leah Bendlin (Leah Bendlin)
2018-02-02 12:55:27 CST (-0500)

The original collection slip may have only said “Sen”; it was found by OMS member Sen Dwe, not Taylan Sen. I have corrected the observation.

Just saying that Postia stellifera may be related
By: Django Grootmyers (heelsplitter)
2018-01-08 19:08:28 CST (-0500)

This is most likely Osteina obducta or a species going as that. The holotype was collected from “British North America” by a “Dr. Richardson” (see here ) AKA probably somewhere in Canada or the northwestern US. According to Lloyd , the holotype was in Hooker’s herbarium, and it’s likely currently at Kew, although I didn’t find it in searching their collections online. If it turns out that there are different eastern and western species in North America, Polyporus zelleri is a name available for this hypothetical western species. Polyporus osseus seems to be named from Europe and this name would be available for a Eurasian or strictly European species. The description is available here (page 253) but my understanding of it is complicated by not speaking Hungarian and Google Translate not being particularly helpful.

Sequence update
By: Terri Clements/Donna Fulton (pinonbistro)
2018-01-08 18:56:27 CST (-0500)

KC585378, British Columbia, is Osteina obducta according to the paper Alan referenced below, page 5.

Osteina obducta occurs on wood—causing a brown rot in conifers
By: Terri Clements/Donna Fulton (pinonbistro)
2018-01-08 18:18:22 CST (-0500)

This obs is on wood. Albatrellus is terrestrial as is Postia stellifera according to your link.

Postia stellifera (paper linked below)
By: Django Grootmyers (heelsplitter)
2018-01-08 18:14:01 CST (-0500)

…seems to be very similar to Osteina obducta. May also belong in Onnia but it looks like only LSU sequences are available.

Sequences on GenBank
By: Terri Clements/Donna Fulton (pinonbistro)
2018-01-08 15:10:16 CST (-0500)

You can tell that Albatrellus ovinus (FJ845400) is mislabeled since it is a poor match with all of the other A. ovinus, particularly those authored by experts,on GenBank. With regard to the other good match with KC585378, Postia obducta, this was part of the material studied in Ortiz-Santana et al. 2013—sample HHB13540—labelled Postia obducta. According to the authors: “Our results also
suggest that Spongiporus undosus and Postia obducta do not belong in Postia or Oligoporus.” Postia obducta is not a valid name on IF or GenBank. Dr. Alvarado thinks Postia obducta=Osteina obducta. Macro morphology fits.

To see if the names in GenBank are correct
By: Alan Rockefeller (Alan Rockefeller)
2018-01-08 15:05:37 CST (-0500)

To see if the names in GenBank are correct, take a look at the person who made the sequence. If it is an expert in the field that you trust, it’s probably correct. If it’s someone you don’t recognize, take it with a grain of salt. Even misnamed records are valuable as it gives an indication of where else in the world this taxon has been found, and how common it is.

The Albatrellus ovinus sequence FJ845400 is the same taxon, mislabeled.

Here is a paper on this species:

They conclude that the Chinese sequences represent the same taxon, but I disagree because there are 19 nucleotide differences between North American and Chinese sequences.

Sequence comment
By: Matt Gordon (Matt G)
2018-01-08 14:27:33 CST (-0500)

To check the GenBank results, I took sequences from a variety of Albatrellus and Postia species, and all 6 Osteina obducta sequences (there were no other Osteina sequences), and added some Spongiporus sequences. The tree formed from these sequences formed 3 branches: an Albatrellus branch, a Postia branch and an Osteina/ Spongiporus branch. MO 298616 ended up on the Osteina/ Spongiporus branch. This branch also included 2 Albatrellus sequences and 4 Postia sequences, so there’s some taxonomic confusion with this group. The Albatrellus branch is distant from the other branches, so it is clear that MO 298616 is in the Polyporales, not the Russulales. Also, considering that both Postia and Spongiporus are in the Dacryobolaceae family (Osteina is of uncertain family), MO 298616 is probably in the Dacryobolaceae. There may be other genera on this branch that I didn’t look at, so I wouldn’t want to make a guess as to genus. Is there some taxonomic character that could be used to determine if it’s an Osteina?

BLAST with query subrange
By: Joseph D. Cohen (Joe Cohen)
2018-01-08 09:54:31 CST (-0500)

When this sequence is BLASTed using the query subrange 1-600 recommended by Matt Gordon (who did the sequencing) instead of the default BLAST settings, then the top matches (ident >= 98%) are:

Description Max score Total score Query cover E value Ident Accession
Postia sp. 1083 1083 100% 0.0 100% KC585378.1
Albatrellus ovinus 1077 1077 100% 0.0 99% FJ845400.1
Osteina obducta (MO Observation 248663) 1034 1034 95% 0.0 100% MG490981.1

But how can we tell if the names in Genbank are correct?
Are there sequenced types or reference sequences for any of those taxa?

Sequence not a good match
By: Richard Bishop (Leciman)
2018-01-08 01:39:48 CST (-0500)

The sequence for this specimen was not a good match for previous Albatrellus skamanius sequences. However, there was a 100% match for a sequence identified as a Postia species. The researchers using the sequence determined that the “Postia species” did not fit in the Postia clade but was closely related. “Postia sp.” was collected in British Columbia.

Nice find Taylan.
By: Richard Bishop (Leciman)
2017-11-14 23:31:59 CST (-0500)

I would love to examine this collection if you still have it. As you probably know this is an extremely rare species and it would definitely be worthwhile to have it sequenced. I noticed you already gave it an OMS ID number so perhaps you have already talked to Joe Cohen about it? If so did he talk to you about getting it sequenced?
I spent some time in Bull of the Woods when I was younger, before I got interested in mushrooms. Pansy, Big Slide, Twin and the near fictional Mother Lode Lakes.

Neat find!
By: Christian (Christian Schwarz)
2017-11-14 12:34:54 CST (-0500)

Created: 2017-11-14 09:52:54 CST (-0500)
Last modified: 2018-11-27 19:34:37 CST (-0500)
Viewed: 249 times, last viewed: 2019-09-24 13:43:09 CDT (-0400)
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