Max10 Posted October 3, 2020 Share Posted October 3, 2020 Good evening! My name is Max, i'm writing from Italy and i'm new (just did my presentation) This is my first topic... I want kindly ask you if it is possible to make an identification of the following trilobite. I tried to make the best photos i can with my cellphone (unfortunately i don't have any other cameras ). I give you also the information that i have on this trilobite...but i doubt about the taxonomy... Phacops rana africana Jbel Zguilma (Foum Zguid), near Alnif, Morocco Emsian, Devonian Lenght: 6.0 cm Wide: from 2.5 cm to 3.4 cm I want to say already thanks to all of you! Enjoy your weekend! Link to comment Share on other sites More sharing options...
Darktooth Posted October 3, 2020 Share Posted October 3, 2020 @piranha @Kane @Tidgy's Dad might be able to help. I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Top Trilo Posted October 3, 2020 Share Posted October 3, 2020 Looks like a reedops to me however lets wait for the people Darktooth mentioned. “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted October 3, 2020 Share Posted October 3, 2020 I always get these phacopids horribly mixed up, but Reedops sounds good to me. Scott will know for sure. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Kane Posted October 3, 2020 Share Posted October 3, 2020 I’m not as confident with Reedops as they tend to have a more pronounced glabella, and a smoother rather than more tuberculate ornamentation. 2 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
fifbrindacier Posted October 3, 2020 Share Posted October 3, 2020 I agree with Kane, i think this is a Phacops. I also agree with the Rana africana identification. 1 "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
fifbrindacier Posted October 3, 2020 Share Posted October 3, 2020 To me it also could be a Morocops forteyi. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Huntonia Posted October 3, 2020 Share Posted October 3, 2020 I'd say the ID provided looks fairly accurate, it certainly looks to be a phacops to my eyes. I'm horrible with the species as that often depends on the lense count of the eyes. 1 Link to comment Share on other sites More sharing options...
piranha Posted October 3, 2020 Share Posted October 3, 2020 Morocops ovatus has the correct range of lens counts per file and similar pattern of wide conical tubercles on the glabella. This diagram shows the lens frequency variability---note that all 20 exemplars have 5 lenses in the third anterior lens file. McKellar, R.C., Chatterton, B.D.E. 2009. Early and Middle Devonian Phacopidae (Trilobita) of Southern Morocco. Palaeontographica Canadiana, 28:1-110 PDF LINK 5 Link to comment Share on other sites More sharing options...
fifbrindacier Posted October 3, 2020 Share Posted October 3, 2020 As far as i know, tell me if i'm wrong, the name of Rana africana was replaced by Barrandeops ovatus and does Morocops ovatus replace that last one or is it replaced by Morocops forteyi ? I'm a little lost in the names of trilobites because of the numerous changes of nomination. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
piranha Posted October 3, 2020 Share Posted October 3, 2020 39 minutes ago, fifbrindacier said: As far as i know, tell me if i'm wrong, the name of Rana africana was replaced by Barrandeops ovatus and does Morocops ovatus replace that last one or is it replaced by Morocops forteyi ? I'm a little lost in the names of trilobites because of the numerous changes of nomination. Eldredgeops (=Phacops) rana africanus (still valid) was originally described in this paper: Burton, C.J. Eldgredge, N. 1974 Two New Subspecies of Phacops rana [Trilobita] from the Middle Devonian of North-West Africa. Palaeontology, 17(2):349-363 PDF LINK Barrandeops ovatus and B. forteyi were reassigned to Morocops in this paper: Van Viersen, A., Holland, D., Koppka, J. 2017 The Phacopine Trilobite Genera Morocops Basse, 2006 and Adrisiops gen. nov. from the Devonian of Morocco. Czech Geological Survey, Bulletin of Geosciences, 92(1):13-30 PDF LINK Morocops forteyi is distinctive with a cruciform arrangement of lenses: 4 Link to comment Share on other sites More sharing options...
Max10 Posted October 3, 2020 Author Share Posted October 3, 2020 8 hours ago, Top Trilo said: Looks like a reedops to me however lets wait for the people Darktooth mentioned. 5 hours ago, Tidgy's Dad said: I always get these phacopids horribly mixed up, but Reedops sounds good to me. Scott will know for sure. 4 hours ago, Kane said: I’m not as confident with Reedops as they tend to have a more pronounced glabella, and a smoother rather than more tuberculate ornamentation. 4 hours ago, fifbrindacier said: I agree with Kane, i think this is a Phacops. I also agree with the Rana africana identification. 4 hours ago, Huntonia said: I'd say the ID provided looks fairly accurate, it certainly looks to be a phacops to my eyes. I'm horrible with the species as that often depends on the lense count of the eyes. Thanks everybody for your support and help, i really appreciate it! 1 Link to comment Share on other sites More sharing options...
Max10 Posted October 3, 2020 Author Share Posted October 3, 2020 4 hours ago, piranha said: Morocops ovatus has the correct range of lens counts per file and similar pattern of wide conical tubercles on the glabella. This diagram shows the lens frequency variability---note that all 20 exemplars have 5 lenses in the third anterior lens file. McKellar, R.C., Chatterton, B.D.E. 2009. Early and Middle Devonian Phacopidae (Trilobita) of Southern Morocco. Palaeontographica Canadiana, 28:1-110 PDF LINK Thanks a lot, piranha! So it's a Morocops ovatus! I'm happy i finally have a correct name for this specimen! Thank you again! Now i would kindly ask you the difference between Phacops and Morocops genus... I know the story of the name Eldredgeops vs Phacops... but i cannot understand which are the main differencies between Phacops and Morocops...it's "only" a matter of lens counts or there are also other features? Now i have only two trilobites in my collection (this one and a Hollardops mesocristata) but defintely i want to increase their number 1 Link to comment Share on other sites More sharing options...
piranha Posted October 3, 2020 Share Posted October 3, 2020 17 minutes ago, Max10 said: Now i would kindly ask you the difference between Phacops and Morocops genus... Compare the diagnosis from the Morocops paper with this informative post on the defining characters of Phacops and Eldredgeops: 1 Link to comment Share on other sites More sharing options...
Max10 Posted October 3, 2020 Author Share Posted October 3, 2020 8 minutes ago, piranha said: Compare the diagnosis from the Morocops paper with this informative post on the defining characters of Phacops and Eldredgeops: Perfect, i had miss the link to the Morocops pdf Now i see it and already know the beautiful post of GerryK...amazing work! Tomorrow i'll start to study the Morocops pdf! I'm so excited Thanks again, piranha! Now i go to bed (it's 2AM in Tuscany)...goodnight! Link to comment Share on other sites More sharing options...
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