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JKUK
Joined: 17 Dec 2007
Posts: 60
Location: Essex
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Hi everyone,
This is my first post.
I'm interested if anyone has any information regarding the correct species name for the blue ramshorn. I've noticed that they are often refered to as Planorbarius corneus. However I believe they are more likely to be Planorbella duryi .
As Planorbarius corneus easily grows to 30mm and Planorbella duryi only 15mm it should be relatively easy to rule out the latter.
How large do the blue ramshorns grow?
Any ideas? |
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chrisp
Crustaforum-Team
Age: 36
Joined: 15 Jan 2006
Posts: 83
Location: 46537 Dinslaken
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Hi,
the blue ramshorn is a normally ramshorn ( corneus ), only in blue.
They will reach a size of 25mm. |
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_________________
Greetz
Christian
German Page!
Sometimes you lose and sometimes the others win |
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JKUK
Joined: 17 Dec 2007
Posts: 60
Location: Essex
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Thanks,
Do you know if the spotted ones are also corneus?..........I have only seem small ones up to 15mm. |
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chrisp
Crustaforum-Team
Age: 36
Joined: 15 Jan 2006
Posts: 83
Location: 46537 Dinslaken
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Hi,
the snails that I saw was corneus? I don't know if this is the only blue snail with this outfit. |
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_________________
Greetz
Christian
German Page!
Sometimes you lose and sometimes the others win |
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Ulli Bauer
Crustaforum-Team
Age: 34
Joined: 04 Mar 2008
Posts: 290
Location: Weinstadt
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Hi JK,
the spotted ones are immature. When they grow older the spots disappear.
Cheers
Ulli |
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If it ain't broken, don't repair it. |
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JKUK
Joined: 17 Dec 2007
Posts: 60
Location: Essex
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| Yes my brown spotted ones are now rather plain. I don't think they are corneus though. |
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Ulli Bauer
Crustaforum-Team
Age: 34
Joined: 04 Mar 2008
Posts: 290
Location: Weinstadt
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Hi JK,
as you probably know, all Planorbarius sp. mix freely. After decades of aquaium life, that makes it rather hard to identify the exact subspecies.
I refer to mine simply as Planorbarius sp. to be on the safe side. They aren't corneus (too small), though.
P. corneus gets rather big, so you just have to wait and see...
Cheers
Ulli |
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_________________
If it ain't broken, don't repair it. |
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JKUK
Joined: 17 Dec 2007
Posts: 60
Location: Essex
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Thanks Ulli,
I only have the brown spotted ones, which as you say are too small to be corneus.
Are the plain and spotted blue ones also too small to be corneus?
Cheers
James |
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Ulli Bauer
Crustaforum-Team
Age: 34
Joined: 04 Mar 2008
Posts: 290
Location: Weinstadt
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Hi James,
mine, yes. As are the pink and the red ones, and even the brown ones. After reading up a little on them I don't think they're Planorbarius at all, I'd rather say they're Planorbella sp.
Cheers
Ulli |
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_________________
If it ain't broken, don't repair it.
Last edited by Ulli Bauer on Sun Mar 09, 2008 2:29 pm; edited 1 time in total |
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JKUK
Joined: 17 Dec 2007
Posts: 60
Location: Essex
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| Many thanks that solves an ongoing mystery for me. |
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