HOME | DD

Eurwentala — Secrets in the soil, part 2

#conehead #ecology #invertebrates #mite #soil #pseudoscorpion #acari #protura
Published: 2019-08-06 21:40:57 +0000 UTC; Views: 5566; Favourites: 221; Downloads: 0
Redirect to original
Description I got to illustrate a freshly published book about soil ecology and the amazing variety of creatures that live beneath our feet. The book is published by the Finnish publisher Gaudeamus and called Elämää maaperän kätköissä ("Life hidden in the soil"). It was lovely to be able to work with experts of each taxon to depict them as anatomically correct and lifelike.

These three fall to the category of barely visible to the naked eye. Only 2 to 4 millimeters long, these animals are still rather large on the scale of soil inhabitants. Top image is a red velvet mite (family Trombidiidae), a soft and squishy predator that can be seen running around like a maniac. Despite their size, they are fairly noticeable due to their bright colour and active habits. I'd like to enlargen one to the size of a cat and keep it as a pet.

The middle one is a species of forest-dwelling pseudoscorpion (Neobisium carcinoides) just failing to catch a springtail of the genus Pogognathellus. Pseudoscorpions look clumsy and gentle, but they are active predators with poisonous pincers. They eat by vomiting digestive juices on top of their victim and then slurping down the resulting bug smoothie. Yum.

In the bottom image waves a proturan of the genus Eosentomon. Distant cousins to insects, proturans are so small and inconspicuous that nobody noticed them until the 20th century. They lack antennae, and instead walk around waving their first pair of legs to feel around. I guess this makes them technically tetrapods. 
Related content
Comments: 27

lazejovanov [2022-11-14 19:25:51 +0000 UTC]

👍: 0 ⏩: 0

BluegirlWoomy [2019-10-28 09:15:03 +0000 UTC]

pseudoscorpions are useful because they kill harmful mites in the house

👍: 0 ⏩: 1

Eurwentala In reply to BluegirlWoomy [2019-10-29 07:49:32 +0000 UTC]

👍: 0 ⏩: 0

TheSirenLord [2019-10-23 00:36:03 +0000 UTC]

would a velvet mite the size of a cat try to eat you?

👍: 0 ⏩: 1

Eurwentala In reply to TheSirenLord [2019-10-28 07:26:19 +0000 UTC]

👍: 0 ⏩: 1

TheSirenLord In reply to Eurwentala [2019-10-28 11:08:34 +0000 UTC]

yeah

👍: 0 ⏩: 0

TarbosaurusBatar [2019-09-20 01:40:44 +0000 UTC]

Velvet mites have some very nasty parasitic relatives in the eastern US

👍: 0 ⏩: 1

Eurwentala In reply to TarbosaurusBatar [2019-09-23 06:20:58 +0000 UTC]

Do you mean Idoxidae, the 'hard ticks' that paratisize humans?

👍: 0 ⏩: 1

TarbosaurusBatar In reply to Eurwentala [2019-09-24 02:30:08 +0000 UTC]

What I meant was Trombiculidae, specifically the ones called "Chiggers"

👍: 0 ⏩: 1

Eurwentala In reply to TarbosaurusBatar [2019-09-24 06:27:51 +0000 UTC]

Oh, I hadn't heard of them. That sounds unpleasant!

👍: 0 ⏩: 1

TarbosaurusBatar In reply to Eurwentala [2019-09-25 01:59:46 +0000 UTC]

Yes they are. 

👍: 0 ⏩: 0

comixqueen [2019-08-25 01:29:16 +0000 UTC]

Thanks to this piece I went and googled proturans and spent like the last hour reading about them. Astounding creatures!

👍: 0 ⏩: 0

NocturnalSea [2019-08-14 11:28:42 +0000 UTC]

It's always a delight to come across red velvet mites. I found a huge colony of them the other day living amongst the lichen that was growing on the metal railing outside my parents' house. 

I've actually seen a few pseudoscorpions wandering around my house. I like to think that they're working with all the spiders to keep down the population of flies that get in every summer.

Man, I really wish "Life Hidden in the Soil" was available in English. I would love to read that book.

👍: 0 ⏩: 0

WillemSvdMerwe [2019-08-07 18:16:42 +0000 UTC]

I encountered a velvet mite over here that was about 2 cm long.

👍: 0 ⏩: 1

Eurwentala In reply to WillemSvdMerwe [2019-08-13 06:50:45 +0000 UTC]

That's a huge one! Wikipedia mentions the largest species as 12 millimeters, but who knows with these animals.

👍: 0 ⏩: 1

WillemSvdMerwe In reply to Eurwentala [2019-08-13 18:05:14 +0000 UTC]

I have a picture of it somewhere, sitting on my hand ... it's blurry but enough to show its size.  I'll see if I can find it ...

👍: 0 ⏩: 0

Kyouken0w0 [2019-08-07 16:09:55 +0000 UTC]

Cool work!

👍: 0 ⏩: 0

bogatyrkhan [2019-08-07 05:33:58 +0000 UTC]

Very fascinating!

👍: 0 ⏩: 0

BudderZilla [2019-08-07 02:44:46 +0000 UTC]

How can their pincers be poisonous exactly? I think that's an oddly special evolutionary trait.

👍: 0 ⏩: 1

Eurwentala In reply to BudderZilla [2019-08-07 05:51:18 +0000 UTC]

Apparently, the same way the tails of true scorpions are poisonous (or is the right word venomous? They're the same in Finnish). They have a poison gland inside the pincer and inject their prey with it. It starts making more sense once you know that the pincers are actually pedipalps, one of the arachnid mouthparts.

👍: 0 ⏩: 1

BudderZilla In reply to Eurwentala [2019-08-08 01:06:07 +0000 UTC]

Aah, so they have glands and inject it to the prey? Got it.  ^^
I was just a bit confused by the wording, cuz if it is injected, it is venomous.
And how can those Lil silly buggers even prey commonly on something so quick and fast like springtails? It's so odd.  xD

I remember seeing those velvet mites in my childhood. (they were so easy to spot, duh)
Haven't seen any in a long, long, long, long time. :c

👍: 0 ⏩: 1

Eurwentala In reply to BudderZilla [2019-08-13 06:49:41 +0000 UTC]

Yeah, sorry for the confusion! Venomous, then.

It's pretty hard to find information about what tiny animals like false scorpions actually commonly eat in the wild - it's not like people watch them with binoculars and take notes! But I assume they eat pretty much anything they can catch. Between soil particles there might not be much space to jump away, making springtails easier prey, while out in the open - as in my illustration - they easily jump out of the way.

I remember seeing more velvet mites as a kid, too. But it's probably because I spent much more time with my nose close to the ground. This summer I did see a huge one on a seaside boulder in northern Norway, though.

👍: 0 ⏩: 1

BudderZilla In reply to Eurwentala [2019-08-15 00:43:10 +0000 UTC]

Norway?  :v

👍: 0 ⏩: 1

Eurwentala In reply to BudderZilla [2019-08-15 04:54:12 +0000 UTC]

Yep! That's where I spent my summer holiday.

👍: 0 ⏩: 1

BudderZilla In reply to Eurwentala [2019-08-16 01:42:07 +0000 UTC]

Aah, alright.
Hopefully it was fun over there. 

👍: 0 ⏩: 0

Deskleaves [2019-08-06 22:38:18 +0000 UTC]

YESSSSS EVEN MORE. I love these, they're so cool and very accurate!!

👍: 0 ⏩: 1

Eurwentala In reply to Deskleaves [2019-08-07 07:37:31 +0000 UTC]

Thank you!

👍: 0 ⏩: 0