coyote
Archachatina papyracea
Cochleas ego amo
Posts: 2,955
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Post by coyote on Aug 2, 2010 21:08:49 GMT
Please post that link, fabrizio.
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Post by fabrizio on Aug 3, 2010 1:03:06 GMT
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aerliss
Achatina immaculata
Posts: 281
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Post by aerliss on Aug 3, 2010 10:39:55 GMT
Hehe! They look like smiley faces XD
*cough*
Interesting that they're not symmetrical in some species, but are in others. Thanks for the link!
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Post by fabrizio on Aug 3, 2010 11:49:10 GMT
Surely, that "smiley" resemblance makes the basic patterns somewhat "easier" to remember, for us!
Symmetric/asymmetric conditions are typical evolutionary outcomes, sometimes useful to classify and understand the genealogy of the various lineages; bearing in mind however, that often the same solution is reached through different pathways, along evolutionary routes.
So "genealogy", as expressed in that interesting book, is quite different in fact, if relying upon more recent survey of mtDNA; "Pulmonata" clade is no more recognized, as it results to be polyphyletic; and Veronicella, for example, results now much more "akin" to sea-slugs, sea-hares, Nudibranchs and so on, rather that to "usual" land slugs (and land snails).
The fact that "distinct" lineages can reach the same morphological/functional "solutions", obviously reveals a "shared range of potential projects" within the LAC (Last Common Ancestor) of all living Gastropoda, so that similar neural (or conchological) patterns could re-appear in different lineages. The environmental needs act as a selective pressure, for evolutionary "switching" towards a certain kind of neural pattern or another, both being "available"-presumably- in the ancient, common genetical pool shared by the entire group.
I could try to make a simplified sketch of the above... yet it would fit in a different topic
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Post by ness on Aug 3, 2010 22:02:33 GMT
Oh they're great pictures, and very pretty snails So glad they're all doing so well, it's hard to know what to do with snails you are unfamiliar with - care-wise, but you seem to have got things just right for them. They really are adoreable. Yeah it's great seeing food go through them, I see that on some of mine too. Is that the brain? Good question. I'm not sure. Snails have sets of ganglia, or knots of nerves, that control various functions, and these are not all found in one place in some snails, but I'm not sure if this is true of all species? It looks like a brain
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aerliss
Achatina immaculata
Posts: 281
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Post by aerliss on Aug 28, 2010 21:34:13 GMT
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coyote
Archachatina papyracea
Cochleas ego amo
Posts: 2,955
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Post by coyote on Aug 29, 2010 15:27:00 GMT
At first glance, the youngsters look like aspersas to me.
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Post by Robert Nordsieck on Aug 29, 2010 18:18:28 GMT
Hi, they certainly do, coyote! In the meantime I recalled that I have a picture of an Eobania vermiculata in my Facebook group. It is also too globulous for an Eobania (as I knew them so far), but at least it looks like an Eobania concerning the shell colour. This one here has exactly got colour and pattern as I know it from Cornu aspersum, such as this: Picture Robert NordsieckRegards Robert
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Post by ness on Aug 30, 2010 21:29:30 GMT
Oooh they are beautiful i like their variety.
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Post by Robert Nordsieck on Aug 31, 2010 18:32:02 GMT
Is there any possiblity of resizing the images? They are hanging out of my screen Think I only got 1024 px width...
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coyote
Archachatina papyracea
Cochleas ego amo
Posts: 2,955
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Post by coyote on Aug 31, 2010 23:12:49 GMT
But this way we can enjoy every little skin bump and shell wrinkle in larger-than-life detail! ;D But in all seriousness, the large pics are causing me to sideways-scroll even on my wide-screen monitor, so reducing them to half their current size would be a step in the right direction.
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aerliss
Achatina immaculata
Posts: 281
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Post by aerliss on Sept 1, 2010 8:37:48 GMT
Oops. Sorry. I've pretty much been viewing the site on my phone the last few days (yey for end of festival mad shifts at work!)
I'll just change them to links instead of pics.
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Post by Robert Nordsieck on Sept 1, 2010 18:36:13 GMT
I agree - resizing would have been better... Wouldn't want to chase those fine pictures away...
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apple
Archachatina degneri
Posts: 1,078
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Post by apple on Sept 10, 2010 13:57:36 GMT
Yes, those babies are more likely Helix aspersa or Cornu aspersum. I have already seen young snails of E. vermiculata in the wild and they look like a lot Otala sp. young snails.
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Post by Schnäggli on Sept 16, 2010 13:33:09 GMT
It looks like Eobania vermiculata to me.
EDIT: I mean, the adult whose pics you posted at the beginning of the thread. Not the younglings. In fact, they look like C. aspersum to me.
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aerliss
Achatina immaculata
Posts: 281
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Post by aerliss on Sept 17, 2010 18:18:52 GMT
Their little bodies look so much like the eobania, but their shell size and colour is definitely aspersa, yet they have the same two stripes running along their shells that the eobania does.
But if you guys all agree they're aspersa, then they're aspersa.
Still can't let them go. They're of breeding age now so really need to start looking out for eggs o.O
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Post by kristensaurr on Sept 18, 2010 6:15:37 GMT
No clue what it is, but it sure is a cutey ;D
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Post by Schnäggli on Sept 19, 2010 9:02:39 GMT
Ok, I'm officially confused. The adult you showed at first looks like Eobania to me, but the younglings do not. Is the adult from the first page their parent?
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aerliss
Achatina immaculata
Posts: 281
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Post by aerliss on Sept 19, 2010 13:05:05 GMT
We've pretty much concluded he's not. I keep the eobania in a tank with an H.aspersa and a C. nemoralis. I had hatchlings and we didn't know who the parents were at first. It's been concluded that they're H.aspersa from a breeding before I picked him up.
Thanks for the help though XD
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Post by Schnäggli on Sept 19, 2010 14:08:36 GMT
We've pretty much concluded he's not. I keep the eobania in a tank with an H.aspersa and a C. nemoralis. I had hatchlings and we didn't know who the parents were at first. It's been concluded that they're H.aspersa from a breeding before I picked him up. Thanks for the help though XD Haha! =) Ok, that makes sense. Because I think the first snail you showed us is an Eobania. There's lots of variety in the patterns their shells can show - some of them have well marked stripes like Otala, but some do not have stripes at all. I have had a couple of Eobania that I think looked like that one in your pics, with a beige shell and no well defined stripes. Here is a pic (please note it is still a subadult, hence the lack of "lip" on the shell) for comparizon: Also, here is another pic, this one of a full-grown Eobania instead: Does yours look like these guys?
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aerliss
Achatina immaculata
Posts: 281
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Post by aerliss on Sept 19, 2010 19:33:58 GMT
Oh he's definitely an eobania. He does have a couple of stripes but they are not very well pronounced at all.
That second one is lovely. He almost looks like a piece of Greek pottery.
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