Myxomycete of the Day

Not technically fungi, but often lumped together with fungi
Pitufo
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Re: Myxomycete of the Day

Post by Pitufo » Sat Jun 25, 2016 7:46 pm

Arcyria obvelata..found yesterday near Newcastle upon Tyne.
Arcyria obvelata 0 sat 1000.jpg
Arcyria obvelata1 sat 1000.jpg
arcyria_obvelata3_sat21000.jpg
Arcyria obvelata7_1000.jpg
Arcyria obvelata 8 sat21000.jpg
Arcyria obvelata capillitium 3 1000.jpg
Last edited by Pitufo on Tue Jun 28, 2016 10:02 am, edited 2 times in total.

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Chris Johnson
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Re: Myxomycete of the Day

Post by Chris Johnson » Sun Jun 26, 2016 6:10 am

Great images 8-)

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Re: Myxomycete of the Day

Post by Pitufo » Thu Jun 30, 2016 8:45 pm

Thanks Chris. I seem to be monopolising this thread.. but the woods were bountiful again today..

I think this is Phsyarum leucophaeum. It changed from colourless/white to this ethereal pink/orange tint and then to grey within the space of a few hours..
Physarum300616_1000.jpg
2016-06-30-20.44.48 ZS PMaxflash1000.jpg

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Wood Wanderer
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Re: Myxomycete of the Day

Post by Wood Wanderer » Fri Jul 01, 2016 3:05 pm

I think this is Phsyarum leucophaeum. It changed from colourless/white to this ethereal pink/orange tint and then to grey within the space of a few hours..



Stunning photo, keep posting ...

John

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Re: Myxomycete of the Day

Post by Waxcap » Sun Jul 03, 2016 10:40 am

Superb photos, well done.
In the photos I took of P. leucophaeum it looked quite blue, I'm sure the surface shows a sort of thin-film effect and the colour depends on lighting and surrounding colours . I do notice on your first shot that the lime encrustation on the surface looks pink as well - and of course this would be white so I would suspect there is a pink colour cast to the whole image - nice effect though.

Dave

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Re: Myxomycete of the Day

Post by Pitufo » Sun Jul 03, 2016 11:51 am

Thank you for your comments, John and Dave. Yes, colour varies massively depending on lighting. Those were taken using flash but I sometimes use Jansjos. I usually shoot manually, so aperature, shutter speed and flash power vary also. As I side note, I think using flash may be detrimental to immature myxos.

Slightly off piste but still containing a myxo, Stemonitopsis typhina, I believe. When looking for myxos, there are almost invariably specialised slime-mould beetles present, often in large numbers.

They usually pop in and out of photos, but this one wandered into view and had his lunch right in front of me.

I did some reading and these usually belong to the Leiodidae - this one is probably an Agathidium or Anisotoma, but they are tricky to get to species. They are usually round and there defence is to pull in their legs and head and play dead and roll off the substrate. Some also have specialised dimples, thought to carry spores and help distribute the myxo.
Beetle1 1000.jpg

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Re: Myxomycete of the Day

Post by Waxcap » Sun Jul 03, 2016 4:21 pm

That's an outstanding image!

Dave

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Re: Myxomycete of the Day

Post by Pitufo » Sun Jul 03, 2016 8:03 pm

Thank you very much Dave, very kind :D I was very surprised the beetle remained still for the 15-20 photos I needed to stack it - although you can see blurring of the antennae.

I went back and dug out another couple of photos from earlier in the Physarum shoot to see how the colours compared. When I collected it at about 2pm it was almost colourless to pale yellow with a hand lens. By the time I got it onto a stereo it was translucent yellow heading towards orange (3pm). The earliest photos show the yellow/orange colour. The photo with the orange/pinkish tinge was taken after these (about 4pm) - it had turned grey within an hour or so (with a touch of the a blueish irridescence you mentioned).

I think there are artefacts of stacking which often give indistict halos around the subject, adding to the "glowing" effect. They almost appear bioluminescent. Full sequence shown in order below. In the first photo, the sporangium at the bottom right still has the yellow coloration.
2016-06-30-15.54.28 ZS PMaxflash1000.jpg
2016-06-30-16.36.26 ZS PMaxFlash1000.jpg
Physarum_leucophaeum_1_1000.jpg
Physarum_leucophaeum_2_1000.jpg

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Re: Myxomycete of the Day

Post by Waxcap » Sun Jul 03, 2016 9:47 pm

I imagined you would have to have do some fast stacking!

My pics of P. leucophaeum are here http://www.newforest.com/page_2.asp?epi ... eucophaeum

You can see that in the first two photos the lime on the surface has a blue cast and it should be white - the whole image is too blue. I was using flash and there are some navy blue curtains about half a meter away so maybe that's what caused the blue cast. In the third higher magnification image the lime is almost white (as it should be) so I think that it's a much more accurate representation of the colour of my sample.

Dave

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Re: Myxomycete of the Day

Post by Pitufo » Mon Jul 04, 2016 9:32 am

Beautiful photos Dave. You've captured the iridescence nicely. The example of leucophaeum shown in Poulain also has a distinctly blue cast to it, so it may not be that far off.

You have some other great photos on there too. I have some technical questions for you but probably better to split them to another thread.

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Re: Myxomycete of the Day

Post by Waxcap » Mon Jul 04, 2016 3:32 pm

You could put your questions in the "Microscopes, Cameras, Equipment, Technology" area and I'll do my best.

Dave

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Re: Myxomycete of the Day

Post by Pitufo » Tue Jul 05, 2016 3:10 pm

Thanks Dave, will do. Found lots of these at the weekend. Arcyria denudata.
2016-07-04-21.30.58 ZS PMax1000.jpg

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