Showing posts with label springtails. Show all posts
Showing posts with label springtails. Show all posts

Watch a spider shed its skin under the microscope!

Posted by Graeme Lyons , Thursday, 28 March 2019 16:32

Yesterday, as well as four species of ladybird beaten from one branch of a Douglas Fir, there was also a sub adult male Araneus (either triguttatus or sturmi). Now sturmi usually favours evergreens and trigutattus deciduous trees according to the texts. So you would think that it's more likely to be sturmi. Being a young male though, it wasn't possible to tell. I fed him some springtails from the garden today to see if he would grow. An hour later I checked to see if he had eaten any of them and it appeared dead. No, wait, it's just started shedding its skin. So I dashed to the microscope and set up the camera and recorded it shedding its skin! So cool...

Turns out it is Araneus triguttatus which is much commoner in Sussex than sturmi. I have never seen one with this particular colour pattern as they are usually much more orange with a distinctive pattern, not these three pale dots. My 125th spider for the year and another new species for Burton Pond. I would have missed this if I had looked 10 minutes later, so feeling pretty lucky.

I've seen 10% of the UK beetle fauna!

Posted by Graeme Lyons , Friday, 17 February 2012 17:58

So tussocking has really provided the goods this week at Woods Mill. I have added quite a few new species and I've become well entrenched in my new office. I managed to get the Victorian gentleman's desk into my new house with a little help from Niall Basquille. So, the new set up works well. Anyway, back to the tussocking. I have recorded the following species this week, those highlighted in bold were new species for me. Nothing particularly rare here but considering I walk around Woods Mill near daily, I was surprised to get so many ticks!

Carabids
Paradromius linearis
Philorhizus melanocephalus
Oxypselaphus obscurus
Agonum gracile (above photo)
Pterostichus vernalis
Agonum thoreyi

Staphylinids
Anotylus rugosus
Stenus bimaculatus
Paederus riparius
Sepedophilus nigripennis 
Tachyporus spp. (I think I have at least two species but need to spend some more time on them)
Stenus spp. (I have at least another two species, I need more time though!)

Ladybirds
16-spot Ladybird
24-spot Ladybird

Woodlice
Common Pygmy Woodlouse
Common Striped Woodlouse
Common Shiny Woodlouse
Common Pill Woodlouse

Bugs
Drymus sylvaticus

Arachnids
Nemastoma bimaculatum
Ozyptila brevipes
Pisaura miribilis
Tibellus sp.

Leaf beetles
Phaedon tumidulus

What this illustrates is the importance of over-wintering structure for invertebrates. I also realised quite quickly that a tussock on the high and dry in or next to a wetland can be rammed with invertebrates. My 403rd species, making 10% of the 4034 or so UK species, was Agonum gracile above.

Also this week I have got hold of the key to springtails. I have two large specimens to look at today and see how the key works...

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