Observation 26750: Lycogala terrestre Fr.
When: 2009-10-17
No herbarium specimen

Proposed Names

47% (4)
Eye3 Eyes3
Recognized by sight
38% (4)
Recognized by sight: I am not convinced that these have an orangish color

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Any news on separating L. terrestre and L. epidendrum?
By: Clare Blencowe (clare)
2016-06-12 09:22:39 EDT (-0400)

Hey there

Just seen this thread which neatly summarises issues I’m having with identifying a slime mould species I found today (in Sussex, England) which I think must be either L. terrestre or L. epidendrum.

Details here: http://misidentifyingfungi.blogspot.co.uk/...

I wondered if there’s any news in the myxomycological community on whether these are really two separate species?

Cheers,

Clare

Danny
By: damon brunette (damonbrunette)
2012-05-05 14:57:42 EDT (-0400)

I have a couple of these…

“North American Slime Molds” 1922 has L. Terrestre listed as a variation of L epidendrum. As does the website from University of Arkansas (Stephenson). Stephenson book does not list them as a species however.

Mykobank has L terrestre as a legitimate name as well as L. epidendrum var. terrestre as legitimate, which as you stated may be an update failure.

“How to know the true slime molds” M.L. Farr 1981 does not have L terrestre listed.

“The Mxyomycetes” Alexopoulos does not have it listed.

Bruce Ing it seems is the one to make the distinction.

re: Irene
By: Danny Newman (myxomop)
2012-05-05 09:44:27 EDT (-0400)

neither MycoBank nor IF reflect that opinion, but I suspect that might be due to Myxogastria’s migration out of kingdom fungi, leaving slime mold entries on both sites essentially neglected.

i wonder if more recent slime mold references like the one you’ve cited could be consulted for further guidance. all of these are on the long-term wishlist:

http://www.librarything.com/catalog/myxomop/myxogastria

i bet damon has a handful of these titles.

Hmm..
By: Irene Andersson (irenea)
2012-05-05 01:54:14 EDT (-0400)

I’m not so sure that terrestre and epidendrum are two different species.
Lots of other names have been introduced, also based on colours and size.
I beleive that these characters can vary by different conditions (weather, what they are feeding on, stages of growth etc.)

According to “A Nomenclatural Taxabase of Myxomycetes”(2001), the following names are all synonyms to epidendrum:
fragiformis
pisiforme
variolosum
chalybeum
miniatum
ferruginea
terrestre
affine
nigricans

some questions
By: Danny Newman (myxomop)
2012-05-04 21:16:14 EDT (-0400)

there is no consideration for aethalium colors other than dark grey (L. epidendrum) and rose or buff (_L. terrestre). we frequently see Lycogala observations with outer layers in various shades of red, orange, cream, usually concolorous with the plasmodium/immature spore mass. i guess it depends on when the exterior of Lycogala stops being the outer layer of the plasmodium and starts being an aethalium. is the term aethalium only applied to the outside of the organism once hardened? if so, the key implies that all mature Lycogala with dark aethalia cannot be L. terrestre, which can’t be right, because both spp.’ aethalia darken with age.

edit: this is to say nothing of the other apparently valid spp. (via IF)

L. parietinum
L. fuscoviolaceum
L. flavofuscum
L. exiguum
L. conicum
L. confusum

Orange, peach, pink or vermillion
By: Darvin DeShazer (darv)
2009-10-18 21:03:26 EDT (-0400)

Here is the key step that separates the two Lycogalas according to Ing.
.
5a Plasmodium pure red or carmine, without orange tints, aethalia dark grey, rough, 4-7 mm diameter, cortex scales dark, lobed, spore mass grey fading to olivaceous, pseudocapillitium fragile, less than 12 um diameter…L. epidendrum

5b Plasmodium orange, peach, pink or vermillion, rarely cream, without red tints, aethalia rose or buff, 5-15 mm (or larger) in diameter, cortex scales pale, branched, spore mass pink, peach or salmon, fading to ochraceous, never with olivaceous tints, pseudocapillitium flexible, more than 12 um diameter…L. terrestre
.
Ing, Bruce. 1999. The Myxomycetes of Britain And Ireland. The Richmond Pub. Co., Slough, England. 374p.

Look pink
By: Paul Derbyshire (Twizzler)
2009-10-17 23:48:47 EDT (-0400)

not orange in the 2 photos.

Ing
By: Darvin DeShazer (darv)
2009-10-17 23:39:02 EDT (-0400)

According to Bruce Ing, it is found on wood. The key is orangish color vs pure red for L. epidendrum.

These
By: Paul Derbyshire (Twizzler)
2009-10-17 23:35:17 EDT (-0400)

look like they’re on wood, so why do you think L. terrestre rather than L. epidendrum?

Created: 2009-10-17 23:14:56 EDT (-0400)
Last modified: 2016-05-06 20:33:30 EDT (-0400)
Viewed: 1238 times, last viewed: 2016-11-30 03:23:40 EST (-0500)
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