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Tidgy's Dad
6 hours ago, TqB said:

Thank you! That's very helpful, and confirms the usual advice that 0.5-1.0 is generally the awkward range, apart from some odd but identifiable small tabulates. :)

I'm glad this is of some use to some people :raindance:

Certainly makes it worthwhile and hopefully will prove valuable to collectors in the future 

Convergent evolution is wonderful and fascinating, but sometimes makes life difficult as to ids! 

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Tidgy's Dad

5. Batostomella maniformis. 


Accounting for 4% of the bryozoans in the Much Wenlock Limestone, Batostomella maniformis would have looked quite weird and wonderful. 

It is said to be a roundish basal disc with many branches rising up from it. The disc may be 3 cm wide and each branch is only 1 to 1.5 mm in diameter but up to 25 mm long. They branch at acute angles. The zooaria narrow through the exozone (outer part of the branch) to a tiny and largely concealed opening, so the outer surface appears smooth except for the occasional spine bases marking the positions of acanthopores (hollow spines). 

Simply put, the fossils you find are tiny, smooth sticks, usually in matrix pieces as they are very fragile.  

Notice the sharp angle of branching and the little spine bases that are often not visible or eroded smooth. 








This one shows a mix of different bits, but I think it's Batostomella maniformis with spine bases showing near the bottom between other objects. They can be very difficult to spot. 


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Tidgy's Dad

6. Stenopora primaeva.


4% of the bryozoans found, but they may seem like more as they are quite large and solid, but can sometimes be ignored as they are smooth and look eroded and are a bit like worn horn corals, too. 

In some respects, Stenopora primaeva is similar to Batostomella maniformis in being smooth, ramose and having tiny spines but in this case marking the position of large acanthopores. But it is much bigger, with stems being from 2.5 to 4 mm in diameter. It is also moniliform in shape giving it a beaded or rather blobby appearance. 










I think these may be eroded specimens, but I'm far from certain.0w.thumb.jpg.e5d2b4aceab1cc4d423489709da5b64b.jpg





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Bobby Rico

Wow this thread has move on a bit. I love the last page Wren's Nest material been a few years since I have bern there. Nice to catch up on this thread. Cheers Bobby 

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Tidgy's Dad
6 hours ago, Bobby Rico said:

Wow this thread has move on a bit. I love the last page Wren's Nest material been a few years since I have bern there. Nice to catch up on this thread. Cheers Bobby 

Thanks, Bobby, glad you found the thread again and enjoyed it. :)

Lots of Wren's Nest material to come! 

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Tidgy's Dad

7. Asperopora multispora


Also accounting for 4% of the bryozoans in the Much Wenlock Limestone Formation is Asperopora multispora. There are three species of Asperopora in this formation, and they used to be listed under the genus Lioclema. So a lot of the information on this species was found by searching for Leioclema multisporum. 

Asperopora multispora is an encrusting species which can be told apart from Fistulipora nummulina by it's more widely spaced zooecia, which are often more petaloid in shape due to the presence of acanthopores (hollows that mark the base of small hollow spines), and the presence of numerous mesopores (smaller apertures in between the larger openings of the zooecia). It is often found encrusting brachiopods and crinoids as well as ramose tabulates and bryozoa.   

This one's on a fellow bryozoan; Hallopora elegantula. You can see it at the bottom, creeping around from the other side........... 


..........which it completely covers, you can only see two or three of the hosts zooecia peeking out toward the left end of the specimen :


The host specimen is 9 mm in length. 

A close-up. The mesopores between the main zooecia are not always as clear as this :


Here's an A. multispora colony creeping over the end of another Hallopora: 


This one's on an Eridotrypa cava bryozoan:


On a section of crinoid stem, diameter of stem 9 mm.



This one's on a favositid coral:



And in nearer. It's not so clear as it's been a bit battered and eroded.


The little ramose tabulate coral Coenites striatopora :


And encrusting the other side of it :


 One supposes it killed some of the organisms in the corals and bryozoans it covered unless this happened post mortem. Smothered the poor things. 

Another Asperopora multispora encrusting a Coenites striatpora :




Here's one on an Atrypa reticularis brachiopod :





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Tidgy's Dad

8. Asperopora aspera.


This second species of Asperopora accounts for 3% of the bryozoans found in the Much Wenlock Limestone Formation. 

Asperopora aspera is similar to A. multispora, but is usually found in a massive, often layered form, or as an encruster on the substrate or larger corals. It can reach a little over 10 cm in diameter, but most are only about a cm or two. It has larger petalloid zooecia and larger acanthopores marking the bases of spines that are usually only preserved in unworn specimens. There are fewer mesopores between the zooecia. 

These don't seem to weather free, so you find them on actual rock pieces which are pretty much always 'hash plates' at the Much Wenlock Limestone.

Some of these are from my own collecting days in Forest of Dean, along the Wenlock Edge and in the Malvern Hills, but others are from @JohnBrewerand @thelivingdead531 from the Wren's Nest. So, thanks again, friends! :b_love1:

All about 1 to 2 cm across. 

A nice little Platyceras haliotis gastropod here as well as a bit of crinoid stem :)


Lots going on here, too. Crinoid columnals and a fragment of a fenestellid : 


Close up of the details of various specimens:




Another specimen in close up : 



This one's less than a cm across. 


Not sure if this is one. It looks to be rather small next to this fenestellid. 




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