Tidgy's Dad Posted May 21, 2018 Share Posted May 21, 2018 Hello friends and TFF family! Another little palaeozoic problem. This was given to me back in the mid 1980s and was said to be from the Pentamerus Grits of Newlands, Girvan, Ayrshire, Scotland. Brrrrrrrr!!!!!! I have it marked down only as "Cystoid?" and it may well be. The hexagonal patterned bit down the edge of the rock including the smooth shell like piece is 2.2 cm long. Bad picture. Here is a better close up. You can kind of see above that the hexagons are lying on the surface of the smooth bit, which i once thought was a bit of Pentamerus oblongatus but now think it may be some sort of inner layer of the fossil to which the hexagons are attached. Clearer below : Any ideas would be most welcome! @piranha @TqB Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 21, 2018 Author Share Posted May 21, 2018 For double points, this is just to one side of the same specimen but clearly not associated with it. This thing is tiny, about 2 mm at its widest. A coral? I was thinking the top of Pycnactis crenulata, but I'm decidedly uncomfortable with this. Thanks for any help. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
doushantuo Posted May 21, 2018 Share Posted May 21, 2018 Link to comment Share on other sites More sharing options...
doushantuo Posted May 21, 2018 Share Posted May 21, 2018 BTW:can recommend this for the amazing coral illustrations! Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 21, 2018 Author Share Posted May 21, 2018 Just now, doushantuo said: BTW:can recommend this for the amazing coral illustrations! Thank you, just off to bed as it's 5 am here, I'll try and find a copy tomorrow. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
TqB Posted May 21, 2018 Share Posted May 21, 2018 Hi Adam, I believe it's the alga Mastopora fava (so @doushantuo got it with the first reference). Here's mine from the Lower Llandovery of S. Wales. Tarquin Link to comment Share on other sites More sharing options...
doushantuo Posted May 21, 2018 Share Posted May 21, 2018 That's an amazing specimen ,Tarq. Most(if not all) of your fossils are visually spectacular ,so maybe I should just stop saying complimentary things about them. Link to comment Share on other sites More sharing options...
TqB Posted May 21, 2018 Share Posted May 21, 2018 9 minutes ago, doushantuo said: That's an amazing specimen ,Tarq. Most(if not all) of your fossils are visually spectacular ,so maybe I should just stop saying complimentary things about them. Thank you! But that's why we take photos. And to educate, inform and query of course. Tarquin Link to comment Share on other sites More sharing options...
doushantuo Posted May 21, 2018 Share Posted May 21, 2018 i can heartily recommend ALL THREE items below!!! edit(Hours later): but only if you're able to read German. The Stolley piece was pretty hard to find,it always seems the "classics" are harder to find than the "grey literature" Stolley outtake: Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 21, 2018 Author Share Posted May 21, 2018 3 hours ago, TqB said: Hi Adam, I believe it's the alga Mastopora fava (so @doushantuo got it with the first reference). Here's mine from the Lower Llandovery of S. Wales. WOW ! ! ! Lovely specimen and a perfect match, I'd say. So it looks that mine was growing on a pentamerid brachiopod shell, at least in part. How wonderful. Any ideas about the 'coral' ? Thank you very much, Tarquin. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
TqB Posted May 21, 2018 Share Posted May 21, 2018 1 hour ago, Tidgy's Dad said: Any ideas about the 'coral' ? I'd guess a little favositid but there's not much to go on. Looks more like tubes rather than septa and doesn't look symmetrical enough for Pycnactis or other solitary rugosan but I could well be wrong. Tarquin Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 21, 2018 Author Share Posted May 21, 2018 Just now, TqB said: I'd guess a little favositid but there's not much to go on. Looks more like tubes rather than septa and doesn't look symmetrical enough for Pycnactis or other solitary rugosan but I could well be wrong. Thank you. I'll have a bit more of a peek at some Llandovery corals. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
TqB Posted May 21, 2018 Share Posted May 21, 2018 Or could be a bryozoan... Tarquin Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 21, 2018 Author Share Posted May 21, 2018 1 hour ago, TqB said: Or could be a bryozoan... Oh, well, it'll keep me busy. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted May 21, 2018 Share Posted May 21, 2018 Taxonomy update: Cyclocrinites favus (Salter 1851) The Tribe Cyclocriniteae was named by Pia (1920) and emended by Bassoullet et al. (1979). It includes the Ordovician and Silurian genera Cyclocrinites Eichwald, Mastopora Eichwald, Coelosphaeridium Roemer, and Apidium Stolley. It should be noted that the genus name Cyclocrinites (not Cyclocrinus) has priority, so the tribe is the Cyclocriniteae (not Cyclocrineae). Furthermore, Mastopora is now commonly regarded as a junior synonym of Cyclocrinites (as are Nidulites Salter, Pasceolus Billings, Cerionites Meek and Worthen, and Lunulites Owen). Nitecki (1970, pp. 73-75) elaborates on these points. Beadle, S.C. 1991 - Cyclocrinitids. pp. 114-124 In: Riding, R. (ed.) Calcareous Algae and Stromatolites. Springer Scientific Publishing, 571 pp. Nitecki 1970: Link to comment Share on other sites More sharing options...
TqB Posted May 21, 2018 Share Posted May 21, 2018 @piranha Thanks, So Ben was right and I'm out of date. Tarquin Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 21, 2018 Author Share Posted May 21, 2018 25 minutes ago, TqB said: @piranha Thanks, So Ben was right and I'm out of date. You're not the only one. Many papers and books etc. since 1991 still refer to Mastopora. I guess it takes a long time for the word to spread. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted May 21, 2018 Share Posted May 21, 2018 5 minutes ago, Tidgy's Dad said: You're not the only one. Many papers and books etc. since 1991 still refer to Mastopora. I guess it takes a long time for the word to spread. And Phacops used to be Calymene, but I digress. In any event, at least we do our level best... Link to comment Share on other sites More sharing options...
doushantuo Posted May 30, 2018 Share Posted May 30, 2018 "fragments of a LLandovery Palaeodictyon" Simpson wasn't exactly an ichnological slouch Link to comment Share on other sites More sharing options...
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