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Interesting Umbilia


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XEP-BAM




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PostPosted: 15.02.2007, 21:18    Post subject: Interesting Umbilia Reply with quote









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felix
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PostPosted: 16.02.2007, 15:59    Post subject: capricornica No. 4 Reply with quote

great shells. I would have thought that the No. 4 is a petilirostris
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Aziris





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PostPosted: 16.02.2007, 19:52    Post subject: Reply with quote

Petilirostris is found only in the deep water to the east of the area Lady Elliot Island up to about Heron Island - never off Swain Reefs. Capricornica is found in 80m to 150m off the Swain Reefs but very very rarely in the Capricorn Channel. There are two distinct areas in which the two species are found, with petilirostris never being found off the Swain Reefs which are to the north of the Capricorn Channel and at the southern end of the Great Barrier Reef. The Capricorn Channel separates the Swain Reefs from the Capricorn-Bunker Groups which make up the most southern portion of the Great Barrier Reef.

This capricornica very similar on "flanged variety" of the Hixson Cay. From Lorenz & Massillia 2006, this form named petilirostris too (plate 3). But I do not see a scientific confirmation this thesis.
Coming soon new articles Smilie Sehr glücklich
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XEP-BAM




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PostPosted: 16.02.2007, 20:53    Post subject: Reply with quote

Some Umbilia hesitata from my coll.





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XEP-BAM




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PostPosted: 19.02.2007, 15:00    Post subject: Reply with quote

Interesting hesitata beddomei from Cape Moreton

and interesting hesitata from Cape Moreton
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Sleepycat





Joined: 08 Feb 2007
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Location: Hobart, Tasmania, Australia

PostPosted: 21.02.2007, 21:52    Post subject: Reply with quote

Great pics. Those oriettae are very nice looking things.

I notice all these are from deep or at least deep-ish water. How common is it to get Umbilia alive in very shallow water? I ask this because for years I'd been hearing rumours that there were places in SE Tas where hesitata comes right up to the shoreline, alive. Finally got to check out one of these places recently with a local marine naturalists' group at a very low tide. All up we found seven live (not collected) and eleven dead in about three hours, some exposed on the rock platform, others in a few feet of water. Most of the dead ones were rubbish, but I got one that was rather fresh .

Interested to know if this ever happens in the mainland Australian states as well, and if any of the other species can be found alive along the shoreline anywhere.


Last edited by Sleepycat on 18.07.2007, 10:33; edited 1 time in total
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XEP-BAM




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PostPosted: 07.03.2007, 15:04    Post subject: Reply with quote

Some beddomei from my coll.
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XEP-BAM




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PostPosted: 05.06.2007, 12:01    Post subject: Reply with quote

an interesting hesitata from Tasmania

hesitata intermediate howelli
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XEP-BAM




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PostPosted: 10.06.2007, 20:40    Post subject: Reply with quote

From the collection of Leonid Trofimov
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XEP-BAM




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PostPosted: 18.06.2007, 10:00    Post subject: Reply with quote

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Notocypraea




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PostPosted: 17.07.2007, 05:53    Post subject: Reply with quote

Sleepycat wrote:
Great pics. Those oriettae are very nice looking things.

I notice all these are from deep or at least deep-ish water. How common is it to get Umbilia alive in very shallow water? I ask this because for years I'd been hearing rumours that there were places in SE Tas where hesistata comes right up to the shoreline, alive. Finally got to check out one of these places recently with a local marine naturalists' group at a very low tide. All up we found seven live (not collected) and eleven dead in about three hours, some exposed on the rock platform, others in a few feet of water. Most of the dead ones were rubbish, but I got one that was rather fresh .

Interested to know if this ever happens in the mainland Australian states as well, and if any of the other species can be found alive along the shoreline anywhere.


G'day,

To my knowledge on the Australian mainlaind the shallowest water you could expect to find live Cypraea hesitata in is around 40m.
I have a friend who works for the Tasmanian fisheries dept who has seen live hesitata in as little as 10m of water in the D'Entrecasteaux Channel, south of Hobart. The majority of this population I'm sure is flawed (no doubt a good thing). I am assuming this is where you saw the specimens at extreme low tide?

It would be very nice to see a live one diving (a dream of mine). I've seen most species of Notocypraea & Southern WA/ SA Zoila live insitu while diving but never a hesitata.


Best regards,
Simon

Melbourne, Australia
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Sleepycat





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PostPosted: 18.07.2007, 10:31    Post subject: Reply with quote

Notocypraea wrote:
I have a friend who works for the Tasmanian fisheries dept who has seen live hesitata in as little as 10m of water in the D'Entrecasteaux Channel, south of Hobart. The majority of this population I'm sure is flawed (no doubt a good thing). I am assuming this is where you saw the specimens at extreme low tide?


Yes it was in the Channel and we were there right on the low tide. However, it wasn't that low a tide - 0.27 m in Hobart with lower tides for a few days after that. Hobart has fairly weak tides and often slops around 0.5 - 1.5 m all day. Some of the live specimens were quite high and dry so I suspect people might see live ones sometimes at 0.4-0.5 m lows.

All the feedback I've had so far is that this sort of thing has not been reported before.

Kevin.
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XEP-BAM




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PostPosted: 25.08.2007, 15:39    Post subject: Reply with quote

there is no time to make photos...just one, a really big dark shell, F+++
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XEP-BAM




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PostPosted: 26.08.2007, 10:20    Post subject: Reply with quote

dark and wide shell

two dwarf shells(GEM/GEM)

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Notocypraea




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PostPosted: 26.08.2007, 23:47    Post subject: Reply with quote

Nice shells but pity about the data.
Gabo Island (near border with New South Wales) is a few hundred Km East of Lakes Entrance.

Maybe this indicates that the shell was trawled between Gabo Island and Lakes Entrance!?

109mm and dark... very nice! Geschockt


Simon
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