piranha Posted May 23, 2018 Share Posted May 23, 2018 I had already planned on sharing this a couple days ago. With the recent posting of the Martian pseudocrinoid, the timing of this new paper is perfect! Bonus Points Question: Trombonicrinus (col.) hanshessi gen. et sp. nov. Does anyone have a suggestion for the use of the abbreviation (col.)? A colleague responded: "Odd. I imagine it is for column, but do not really know. If so, it would be as if they are regarded it as a form genus allowed in the botanical, but not the zoological code." Etymology: From the French trombone (earlier, trombon), a brass wind instrument with a slide bent in a tight U-shape (Little et al. 1983, p. 2368). The overall appearance of this crinoid stem is reminiscent of the slide of a trombone. Donovan, S.K., Waters, J.A. and Pankowski, M.S. 2018 Form and function of the strangest crinoid stem: Devonian of Morocco. Swiss Journal of Palaeontology, (ahead-of-print publication) 6 pp. 6 Link to comment Share on other sites More sharing options...
Fruitbat Posted May 23, 2018 Share Posted May 23, 2018 That IS a wild looking crinoid! I'm definitely looking forward to THAT paper being released. -Joe Illigitimati non carborundum Fruitbat's PDF Library Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 24, 2018 Share Posted May 24, 2018 Bizarre. And very beautiful. col. : Colloquial ? Catalogue of Life? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Spongy Joe Posted May 24, 2018 Share Posted May 24, 2018 (col.) is for 'columnal': there is a parataxonomy of crinoid (and other pelmatozoan) columnals, based on morphology without knowing their higher taxonomy (for which you need to see the articulated calyx). So, you get names like Floricolumnus, which is identifiable as a column ossicle, but until someone finds a complete one, we don't know where to place it or what it's related to. It's rather like the parataxonomy of Carboniferous plants - we can give names to 'ferns' based on leaves, but we don't really know what they are until we get the rest of it! This is a doozie. I had a quite similar (but with more developed rootlets) attachment in Caleidocrinus turgidulus from Llandegley Rocks, years ago - will have to dig out the photo. 3 Link to comment Share on other sites More sharing options...
Spongy Joe Posted May 24, 2018 Share Posted May 24, 2018 Here are a couple of Middle Ordovician examples from Llandegley Rocks: Caleidocrinus turgidulus (assigned to the species from matching the columnal form to articulated specimens at the same site) and an unidentified Iocrinus? (normally they have a simple distal coil instead). It's opposite preservation to the above: rapidly-silicified external moulds, with the calcite dissolved very early. The Caleidocrinus was intergrown with a fallen (or buried) Pyritonema sponge, presumably to help with anchoring stability! 2 Link to comment Share on other sites More sharing options...
Herb Posted May 24, 2018 Share Posted May 24, 2018 very cool crinoid "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
piranha Posted May 24, 2018 Author Share Posted May 24, 2018 I also discovered some crinoid workers use the symbol: ø "Use of the columnal symbol (ø) in this index section indicates the identification or name was initially based on columnals, prior to the discovery of cups of crowns. It is also applied to columnal specimens that have been considered to be correctly assigned to the taxon based on cups or crowns." Webster, G.D. 2014 Bibliography and index of Paleozoic crinoids, coronates, and hemistreptocrinoids, 1758-2012. LINK "In this study, the names based on columnals and pluricolumnals are preceded by the prefix “ø”, as done in previous studies of crinoid columnals and pluricolumnals (e.g., Le Menn, 1987, 1988)." Scheffler, S.M., da Fonseca, V.M.M., & Fernandes, A.C.S. 2015 New crinoids from the Maecuru formation (Middle Eifelian; Amazon Basin, State of Para, Brazil). Geobios, 48(1):57-69 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now