Autor Thema: Parasite emerging out of Amaurobius erberi  (Gelesen 8422 mal)

Frits Broekhuis

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Parasite emerging out of Amaurobius erberi
« am: 2011-10-19 09:34:55 »
I caught this Amaurobius a couple of days ago in France. This morning I discovered it had died, apparently due to some sort of parasite crawling out of it. Does anyone know what it is? I've never seen anything like it before.

[2011-10-16-k]

« Letzte Änderung: 2013-01-10 09:27:11 von Frits Broekhuis »

Tobias

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Re: Parasite emerging out of Amaurobius
« Antwort #1 am: 2011-10-19 10:27:03 »
Maybe this? Just an idea.

Tobias

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #2 am: 2011-10-19 13:54:18 »
@Tobias: who knows, thanks for the link.

Whatever killed the spider, is still consuming it. I took this picture a couple of minutes ago.

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #3 am: 2011-10-19 14:07:09 »
Looking closely at the pictures I took before the parasite emerged, one can clearly see the spot where it began (anterior opisthosoma, left side). The opi also appears rather asymmetric.

Jonas Wolff

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Re: Parasite emerging out of Amaurobius
« Antwort #4 am: 2011-10-19 20:10:56 »
Amazing! There are always surprises in arthropods. That's why I like those animals.

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #5 am: 2011-10-21 16:21:23 »
A couple of hours later, the larva had detached itself from the spider.

Walter Pfliegler

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Re: Parasite emerging out of Amaurobius
« Antwort #6 am: 2011-10-21 17:12:21 »
Dr Christian Kehlmeier would be very happy to study the specimen if it reaches adult state, or maybe also as larva. Try to keep the larva in a humid place!

Very nice find!

Walter
Walter Pfliegler - Amateur Naturfotograf (und Molekular Biologe - Ungarn)

Jörg Pageler

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Re: Parasite emerging out of Amaurobius
« Antwort #7 am: 2011-10-21 17:53:21 »
Exciting! I'm curious what it will be!

Jörg

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #8 am: 2011-10-21 19:00:28 »
@Walter: I will try to rear the larva myself, it's way too exciting ;-)

This is what the larva looks like today. It has two symmetrically placed red tubercles and a worm-like 'head' which emerged last from the spiders body.
« Letzte Änderung: 2011-10-21 19:08:49 von Frits Broekhuis »

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #9 am: 2011-10-21 19:07:50 »
The larva is alive and kicking. Looking through the microscope, you can see its intestants moving constantly. Although my microscope camera is rather inferior at taking pictures, it does offer the capability of recording video. Here's a video of the larva moving:

http://www.youtube.com/watch?v=mW3CIuGo6bQ

Note that the speed of the video is about twice real-time, I haven't figured out how to adjust this ;-)

Sylvia Voss

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Re: Parasite emerging out of Amaurobius
« Antwort #10 am: 2011-10-21 23:16:10 »
Wow! thats very interesting Frits
greetings
Sylvia

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #11 am: 2011-10-24 19:22:19 »
It's amazing how the shape of the larva keeps changing. This is how it looks today.

Comparing it with pictures of Acroceridae species (see here), one can see that the shape of the larva looks slightly similar. Maybe you were right, Tobias!

« Letzte Änderung: 2011-10-24 20:15:48 von Frits Broekhuis »

Jonathan Neumann

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Re: Parasite emerging out of Amaurobius
« Antwort #12 am: 2011-10-24 20:54:59 »
This creature won't become a fly, that must be an alien!

That is now the pupa, or? The black thing with the transparent "Dingsbums" is the old skin , isn't it?

LG,
Jonathan
« Letzte Änderung: 2011-10-24 20:56:33 von Jonathan Neumann »
CHAENA MONNA MOKOPUNG aus Afihla Majantja Vol 3.

Tinto von Matsieng, eines meiner Lieblingslieder

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #13 am: 2011-10-24 21:18:41 »
This creature won't become a fly, that must be an alien!

That is now the pupa, or? The black thing with the transparent "Dingsbums" is the old skin , isn't it?

I think the larva is busy transforming into the pupa. I also assume - but I may be wrong - that the black thing is some kind of excretion. I don't know what happened to the 'skin' that has somehow peeled off, but on the inside of that skin, you can still see (2nd photo) the two tubercles which were originally on the sides of the larva.

Joost Vogels

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Re: Parasite emerging out of Amaurobius
« Antwort #14 am: 2011-10-25 00:09:33 »
I would say that the dark excretion is gut content?

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #15 am: 2011-10-25 08:52:15 »
@Joost: that was what I assumed too. (welkom op 't forum!)

I posted a picture of the larva on diptera.info (topic) and a few minutes later mr Christian Kehlmaier replied and confirmed Acroceridae. He expects the fly to emerge in just a couple of days.
« Letzte Änderung: 2011-10-25 11:05:52 von Frits Broekhuis »

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #16 am: 2011-10-25 19:12:37 »
Time for the daily pics.

Sylvia Voss

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Re: Parasite emerging out of Amaurobius
« Antwort #17 am: 2011-10-25 19:36:43 »
Oh...that´s just about the limit!
Very interesting Frits , thank you for the daily news !
greetings
Sylvia

Jonathan Neumann

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Re: Parasite emerging out of Amaurobius
« Antwort #18 am: 2011-10-25 19:45:29 »
wow! I didn't expect, that the pupa changes its colour so fast!
How big is the pupa?

LG,
Jonathan
CHAENA MONNA MOKOPUNG aus Afihla Majantja Vol 3.

Tinto von Matsieng, eines meiner Lieblingslieder

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #19 am: 2011-10-25 20:23:58 »
wow! I didn't expect, that the pupa changes its colour so fast!
How big is the pupa?

I didn't expect it to happen so fast either, but if the fly must emerge within a couple of days - as mr Kehlmaier indicated - it must change rapidly. The pupa is approximately 4mm long, a rough guess.

Tobias

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Re: Parasite emerging out of Amaurobius
« Antwort #20 am: 2011-10-25 23:22:26 »
Ah, cool. Nice to know it's an Acroderidae. After the fly is identificated we should write an article in our wiki about this. Seems to be pretty rare.

Tobias

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #21 am: 2011-10-25 23:29:09 »
Seems to be pretty rare.

Maybe it is, but on the other hand: you only notice this kind of thing when you capture and keep the spider alive, whereas with ecto-parasites you notice it immediately when catching the spider...

Tobias

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Re: Parasite emerging out of Amaurobius
« Antwort #22 am: 2011-10-25 23:35:16 »
Seems to be pretty rare.
Maybe it is, but on the other hand: you only notice this kind of thing when you capture and keep the spider alive, whereas with ecto-parasites you notice it immediately when catching the spider...

In fact, I mean that somebody documented the development. :-) But you're right, it's hard to guess how much spiders are parasitized.

Tobias

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #23 am: 2011-11-02 16:01:35 »
Last night the fly emerged from its cocoon.
When I found it this morning I thought it was dead, but when I poked it, it moved and since then it has crawled around a bit. I haven't seen it attempting to fly yet.

Having googled a bit, I think it resembles Acrocera orbiculus, but I've no experience with flies whatsoever. I will send the fly and what's left of the spider to mr Kehlmaier. He offered to identify the couple by DNA.

Here's a short video of the fly: http://www.youtube.com/watch?v=wYazW72oO4c
« Letzte Änderung: 2011-11-02 16:39:24 von Frits Broekhuis »

Joost Vogels

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Re: Parasite emerging out of Amaurobius
« Antwort #24 am: 2011-11-03 00:58:21 »
Nice report, frits. could you also put a picture of the newly born on waarneming.nl?

Walter Pfliegler

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Re: Parasite emerging out of Amaurobius
« Antwort #25 am: 2011-11-03 14:28:30 »
Awesome! It seems to be a male.

W
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Tobias

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Re: Parasite emerging out of Amaurobius
« Antwort #26 am: 2011-11-03 14:34:21 »
Yes, really nice.

Tobias

pfeiffer

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Re: Parasite emerging out of Amaurobius
« Antwort #27 am: 2011-11-03 15:30:50 »
Awesome! It seems to be a male.

How can you tell? (It took me a minute to realize the that first image was a straight-on lateral view.)

Frits Broekhuis

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Re: Parasite emerging out of Amaurobius
« Antwort #28 am: 2011-11-03 21:59:02 »
Awesome! It seems to be a male.

How can you tell? (It took me a minute to realize the that first image was a straight-on lateral view.)

Based on some google-research I came to the same conclusion. I concluded it had something to do with the yellow transverse band between the thorax and the abdomen, but that's just a wild guess. Maybe Walter can confirm this?

Jörg Pageler

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Re: Parasite emerging out of Amaurobius
« Antwort #29 am: 2011-11-03 22:17:17 »
Very interesting fly! I´ve never seen it before.

Jörg

PS: Unusual background-sound for a fly-video ;-)