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Tom SchrierHi all,We found picnidia on Protoparmeliopsis mur
Scutellinia scutellata – crinita?
Chris Johnson,
13-10-2014 09:54
Found on decorticated wood (probably Fagus), measuring 5-7mm across.
Spores (from a spore-drop): 17.4-20.2 x 11.4-12.7 microns. Low verrucosity and no guttules found.
Setae 430-1200 x 25-45 microns across the range with the longest hairs at the margin. Multi-furcate at the margin, bi- and trifurcate on the lateral setae.
Asci tips blue in Lugol's.
Is the low wart profile sufficient to name this Scutellinia crinita, or should I be looking at other characteristics?
Any help appreciated.
Regards,
Chris
Beñat Jeannerot,
13-10-2014 10:03
Re : Scutellinia scutellata – crinita?
Adio Chris,
In first : Asci not blue on your photo ! And never blue in Scutellinia genus !
In second : 99 % it is S. crinita
In third : S. scutellata is a common name, misused before a long time but designs another species, more rare and more artico-alpine. Therefore, it's a complex, studies are on course.
In last : It's important, in this genus, to see sporal ornementation. Here we can see nothing !
Beñat
In first : Asci not blue on your photo ! And never blue in Scutellinia genus !
In second : 99 % it is S. crinita
In third : S. scutellata is a common name, misused before a long time but designs another species, more rare and more artico-alpine. Therefore, it's a complex, studies are on course.
In last : It's important, in this genus, to see sporal ornementation. Here we can see nothing !
Beñat
Chris Johnson,
13-10-2014 10:04
Re : Scutellinia scutellata – crinita?
I have duplicated an image, I meant to load this one.
Chris Johnson,
13-10-2014 10:12
Re : Scutellinia scutellata – crinita?
Hello Beñat
Many thanks for the rapid response.
I will try another spore-drop but there was little ornamentation to show.
What are the defining charcteristics of Scutellinia scutellata?
Best wishes,
Chris
Many thanks for the rapid response.
I will try another spore-drop but there was little ornamentation to show.
What are the defining charcteristics of Scutellinia scutellata?
Best wishes,
Chris
Chris Johnson,
13-10-2014 11:13
Re : Scutellinia scutellata – crinita?
Here are some new spore images taken at different depths of field.
Regards,
Chris
Regards,
Chris
Beñat Jeannerot,
13-10-2014 13:23
Re : Scutellinia scutellata – crinita?
Adio Chris,
I don't know but I can see nothing here.
It's important to see "on spore" like the following picture,
About scutellata, it's a complex of species and work isn't finished. But one thing, if you want, spores have obtuse ends and are more fusiform than crinita (Q > 1.7).
Beñat
I don't know but I can see nothing here.
It's important to see "on spore" like the following picture,
About scutellata, it's a complex of species and work isn't finished. But one thing, if you want, spores have obtuse ends and are more fusiform than crinita (Q > 1.7).
Beñat
Chris Johnson,
13-10-2014 13:32
Re : Scutellinia scutellata – crinita?
Hello Beñat
Ok, many thanks for your help.
Regards,
Chris
Ok, many thanks for your help.
Regards,
Chris
Chris Yeates,
13-10-2014 14:31
Re : Scutellinia scutellata – crinita?
Hi Chris
that 'blueing' of the ascus apex is an artefact caused by chromatic aberration. The same colour appears here and there throughout that image of the ascus - especially along the edges of the spores.
best wishes
Chris
that 'blueing' of the ascus apex is an artefact caused by chromatic aberration. The same colour appears here and there throughout that image of the ascus - especially along the edges of the spores.
best wishes
Chris
Chris Johnson,
13-10-2014 15:41
Re : Scutellinia scutellata – crinita?
I can see that now, Chris. I was only looking at the apex at the time.
Regards,
Chris
Regards,
Chris