Dark-haired, stipitate Hyaloscyphaceae.

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Dark-haired, stipitate Hyaloscyphaceae.

Edvin Johannesen, 30-06-2020 15:05

Hi!

This one grows on the inner side of bark of Populus tremula. Apothecia small (0.2-0.5 mm in diam when dry). Stalk up to twice as long as apo diameter. Stalk and excipulum covered with blackish hairs. Hairs/hyphae on stalk dark brown i TL, more or less covered with dark granules. Hairs towards rim of apothecia paler and with less or no granules. Spore aseptate (?), ellipsoid, 6-8 x 2 microns, with multiple small guttules (in water). IKI not checked. The bark is covered with a black "subiculum", but I doubt it belongs to this fungus. I am thinking Lasiobelonium or thereabout, but do not find a good fit. Suggestions appreciated. Thanks!

(Sorry about the poor spore image quality - must clean my 100x oil imm. objective)

Hans-Otto Baral, 01-07-2020 09:03

Re : Dark-haired, stipitate Hyaloscyphaceae.

This needs infos about asci and their IKI reaction, paraphyses, and excipulum texture.

For the moment I have no idea.

Edvin Johannesen, 01-07-2020 10:31

Re : Dark-haired, stipitate Hyaloscyphaceae.

Thanks, Zotto. I didn't want to sacrifice more material than necessary. I will try to provide the requested information.

Edvin Johannesen, 01-07-2020 12:24

Re : Dark-haired, stipitate Hyaloscyphaceae.

The paraphyses to me are rather broad, and somewhat lanceolate. They (at least some) seem to be heavily incrusted, reminescent of basidiomycete cystidia.

Ascus pore is "T-shaped", staining blue with Lugol after KOH pre-treatment.

Excipulum to me appears "textura porrecta" with parallel, intertwined hypha (hyaline below the brown, grainy ones).

Does this help?

Viktorie Halasu, 01-07-2020 12:41

Re : Dark-haired, stipitate Hyaloscyphaceae.

Hello,

what about those dark Trichopezizas, atroviolacea or purpureonigra? Some dark lumps on the hairs are visible in the first photos. Would be useful to know how asci react in Lugol without KOH-pretreatment, at least in atroviolacea they are red.

Have a nice day,
Viktorie

Hans-Otto Baral, 01-07-2020 13:02

Re : Dark-haired, stipitate Hyaloscyphaceae.

In fact Viktorie, this is the solution! The spores are a bit small but perhaps because they are dead. The fungus usually occurs in abundance. In fact the apos had sometimes such a long stipe.

Was this a fallen trunk with adhering bark? I would be pleased to mention this sample with its collection data in my planned paper, if you don't mind.

Zotto

Edvin Johannesen, 01-07-2020 13:11

Re : Dark-haired, stipitate Hyaloscyphaceae.

I just tested Lugol without pre-treatment and the ascus pore did stain reddish-brown. So which species is it? I didn't find any of the suggested names in Index Funforum.

Here are collections details:

Norway: Møre og Romsdal, Skodje, Ørnakken

Date: 27 Nov 2019

Substrate: On the inner side of bark of Populus tremula trunk lying on the ground.

Leg: Oddvar Olsen (collection number OOL-20.77).

PS. It grew intermixed with Perichaena corticalis (myxomycete), which appears to favour this substrate.

Hans-Otto Baral, 01-07-2020 13:25

Re : Dark-haired, stipitate Hyaloscyphaceae.

The species is undescribed as it seems, but known to me since almost 30 years.

Also the genus is not easy to resolve. At the moment I call it Trichopeziza atroolivacea, an earlier ID was T. cf. flavofuliginea, but this old taxon was probably something else.

Thanks for the data. Ørnakken seems to be a mountain, I see it in Google Earth. I see Valle and Lommstoenna there, in what direction was it from there, and which altitude?

Edvin Johannesen, 01-07-2020 13:43

Re : Dark-haired, stipitate Hyaloscyphaceae.

Very interesting! The collection was made in the middle of Ørnakken Nature Reserve, ca. 130 m alt. in North-Western slope (so not at high elevation). I attach a map showing the location and coordinates.

The collection will be reported as Trichopeziza sp. and will be visible in GBIF in a few days

Thanks to both for your kind help :)

Screenshot-2020-07-01-Artsobservasjoner-Rapportere-funn-0001.png

Edvin Johannesen, 01-07-2020 16:10

Re : Dark-haired, stipitate Hyaloscyphaceae.

I have corrected to north-western slope.

Hans-Otto Baral, 01-07-2020 16:36

Re : Dark-haired, stipitate Hyaloscyphaceae.

Thanks, this worked. GE says 127 m alt.

Forgot to say: My images of that species are in my folder "Trichopeziza with brown lumps" in Lachnaceae.

Edvin Johannesen, 01-07-2020 17:37

Re : Dark-haired, stipitate Hyaloscyphaceae.

Thanks. I'll have a look :-)

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