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  • »JohnEs81« ist männlich
  • »JohnEs81« ist der Autor dieses Themas

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Dienstag, 21. Januar 2020, 14:32

Schnecken von Berlin

Hello everyone,

I do not know alot about snails and i currently have no literature about identification of snails. I am hoping that someone knowledgeable can help me determine the species or not.

I apologize for the photo quality. I made all of the photos in 2014 using a cheap compact camera. I haven't focused on snails since then because of my lack of id literature.

Here is my list of possibilities (or no clue) for each photo:
1 - Zonitoides nitidus?
2 - Vitrina pellucida?
3 - young Vitrina pellucida?
4 - Xerolenta obvia? young Cepaea hortensis?
5 - keine ahnung
6 - Xerolenta obvia? young Cepaea hortensis?
7 - young Lymnaea stagnalis?
8 - Succinea putris?
9 - keine ahnung

Thank you and Best wishes,
John
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  • »Jürgen Peters« ist männlich

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Dienstag, 21. Januar 2020, 14:56

Hello John,

sorry, I can't help you with snails, but in this case:

8 - Succinea putris?

I predict, that you will only get a Succinea sp. from the specialists.


Viele Grüße, Jürgen
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Borgholzhausen, Deutschland
Typische Habitate, in denen ich unterwegs bin.
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  • »JohnEs81« ist männlich
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Dienstag, 21. Januar 2020, 15:01

Hi Jürgen,

But S. putris is the only species listed for the Berlin area. I've actually identified an S. putris specimen two years ago but it is all one color (amber/burnt sienna). The one in the photo is speckled and multi-colored. I though it could be O. elegans but the description of that species mentions that it is dark colored. I am stumped. At least a Succinea sp can be confirmed. I cannot say it is putris either, despite only putris being recorded in Berlin.

Best wishes,
John

  • »wolf« ist männlich

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Dienstag, 21. Januar 2020, 19:03

Hi John,
sorry, but it's always extremely helpful to have not only one single picture, but several pics with different perspectives. We must be able to judge the general shape of the shell, the opening and the "naval" (= umbilicus). Moreover it's necessary to know the exact width or hight of the shell. In your case at least some of the snails are juvenile and that makes it even a lot more difficult.
Sorry again, but I just don't want to guess based on such thin information given here. For me personally that would't be serious.

Have a nice evening, kind regards: wolf

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Dienstag, 21. Januar 2020, 20:32

Hello wolf,

Thank you for replying. ;)

photo number 1 labelled 'Zonitoides nitidus?' is the only snail in my list that has the umbilicus in view. I will add the photo to this post. I remember that this species was very small. The width of the shell is somewhere between 4 and 5mm.

I do have a measurement and an underside photo of the water snail (photo number 7 labelled 'young Lymnaea stagnalis?'). I will also add these photos to this post. The length may not be accurate due to the angle of the shell but it measures 14mm (10-12mm in direct dorsal view?)

photo number 3 labelled 'young Vitrina pellucida?'. It only has three whorls and i only see one species in the Berlin red list with 3 whorls: Vitrina pellucida. The perspective in the photo shows that the apex sticks out away from the mouth part of the shell further than the typical circular shelled snails. Based upon the red list, it can only be Vitrina pellucida. Is there a similar snail with 3 whorls?

Best wishes,
John
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  • »Kirsten Eta« ist weiblich

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Mittwoch, 22. Januar 2020, 09:19

Hello together,
4
at first I agree with Wolf. With these phothos it's not possible to determinate seriously.

The snails on pic 2,3,4, and 6 are to young to say something. From my experience they all could be young Cepaea. No. 7 should be any Radix if you found it in the water. And No. 8 Succinea or Oxyloma.
Liebe Grüße

Kirsten

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Mittwoch, 22. Januar 2020, 10:35

Hello Kirsten,

Thank you for replying. I appreciate your wisdom. :)

I didn't know the genus Radix until you posted. I see it in the red list for Berlin. Thank you for placing the water snail into a genus.

I started documenting nature in 2014 but i had a cheap compact camera. I upgraded to a 1:1 macro lens in 2016. I haven't made many photos of snails with the macro.

I will do a better job of documenting the snails now. Thank you Wolf and Kirsten.

Best wishes,
John

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Donnerstag, 23. Januar 2020, 09:29

Guten Morgen John,

if you want to go on with snails, it's a good idea to make per snail at least 3 - 4 pics. 1 from up to see the whorls, 1 of the bottom to see the umbilicus and the mouth, 1 from the side to see the slope or any edge and another one from the bottom, very close, is good to see the structure of the shell.

Than please notice were you found it (near water, in a water, forest, garden, witch country and so on. And we need the size. Young animals are mostly not to determinate. From naked slugs you also need a good pic from the caudal.

Not many people are interested in slugs. So please show us what you found. We love it :jip:
Liebe Grüße

Kirsten

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Donnerstag, 23. Januar 2020, 13:57

Arion vulgaris?

Guten Tag Kirsten,

I now have a copy of Die Schneckenfauna der Schweiz, so i see what is required to id a mature snail. I will definitely make more photos of necessary features.

I've tried the aforementioned book on a slug. I arrive at Arion vulgaris but my lack of experience requires a confirmation. I will attach a photo of this slug. Once again, the photo is from 2014 at a local park with a pond in Berlin.

I also have a photo of a young slug that my Wife found in our salad cabbage. I tried the book but i can only deduce that it could be Deroceras cf reticulatum. I measured it at around 20mm. Is it possible to confirm the species of a young slug or not?

Best wishes,
John
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  • »Kirsten Eta« ist weiblich

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Donnerstag, 23. Januar 2020, 22:59

Hi John,
"Die Schneckenfauna der Schweiz" is a fantastic book. I have it myself and really love it. But it is a book for enjoying and for to have a first idea. In the most cases after that beginns the work of determination. For that you mostly need a book with an identification key.

Yes, to 95 % I think that is Arion vulgaris. But seriously we know it exactly after a genital examination. This slug is so variable, that a lot of totaly unexpected things can happen. Arion cf. vulgaris is ok.

It's better to put every individuum in a seperate post please. Looking forward to your salatsnail.
Liebe Grüße

Kirsten

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Freitag, 24. Januar 2020, 14:03

Hello Kirsten,

I agree that Die Schneckenfauna der Schweiz is a fantastic book. I like it very much. My only complaint is lack of drawings (or photos) of genitalia. Other than genitalia, the book is superb! I am happy to have it in my collection.

Thank you very much for spending time on my posts. I appreciate you very much. You are a very nice and helpful. :)

For snails, i think it is better to inspect genitalia for a positive id rather than post photos and end up with a cf or sp. I like snails and slugs and i think that they are overlooked by many hobbyists and professionals. I'm not sure why they are not as popular as, say, Lepidoptera or Coccinellidae. Very interesting.

Anyway, Thank you for everything. I'll still post about the salad slug, so you can enjoy the beauty of slugs with me. :P I have an appointment soon, so i'll post later today.

Best wishes,
John