piranha Posted February 17, 2011 Share Posted February 17, 2011 LINK My friend has assisted with the ID of this odd trilobite from page 9 on this thread. "Also, here is another one of the new trilobites from Morocco - a bit pricey. It looks look a Struveaspis, family Phacopidae, subfamily: Phacopidellinae." Link to comment Share on other sites More sharing options...
ems Posted February 17, 2011 Share Posted February 17, 2011 (edited) "Also, here is another one of the new trilobites from Morocco - a bit pricey. It looks look a Struveaspis, family Phacopidae, subfamily: Phacopidellinae." The trilobite actually looks like Struveaspis. But I´m not to shure if the cephalon fits to the rest of the specimen (in size). Struveaspis micromma, Lowest Middle Devonian (Eifelian), Germany Edited February 19, 2011 by ems Link to comment Share on other sites More sharing options...
Trilobitologist Posted February 19, 2011 Share Posted February 19, 2011 Hello Guys, I think I need to sort out the Ceraurus species posted above. First: The Ceraurus posted on Extinctions (Caleb's link) is NOT C. globulobatis. It is indeed from the Cobourg Fm., but is Ceraurus mantranceras. Second: Pleecan's Ceraurus from Ogden Point is Leviceraurus mammiloides. Third: Frank's weathered and restored specimen seems to me to not be from the Cobourg. It is most likely C. plattinensis and is most likely from the Bobcaygeon. Even reputable sources may make mistakes or switch labels. The bug and also the rock does not look like Cobourg Fm. I could say more for certain if you take closeup photos of both the cephalon and pygidium. Also - take photos of ANY other fossils on the rock (Brachs, bryozoans, trilobite parts etc.). These other fossils may be identifiable to age - thus helping determine whether the bug is Cobourg or Bobcaygeon. Anyhow, that's my 3 cents worth. I think Geodigger would concur. Oh Piranha - On the Selenopeltis - I can't help you with that one. I would think that the article by Bruton (2008) would be the most recent and best source for this. Link to comment Share on other sites More sharing options...
piranha Posted February 19, 2011 Share Posted February 19, 2011 This tantalizing thread has morphed into a magnificent menagerie of trilobite treasures. Great thanks to PzF for the wisdom to launch it with his amazing soft-bodied Triarthrus (5) !! I present Koneprusia, another spiny ondontopleurid for your weekend viewing pleasure. Also check these two TOP examples with tiny thorns preserved on the spines. LINK ENJOY !!! Koneprusia brutoni 1-1/2" (4cm) Devonian - Jbel Oufaten, Morocco Link to comment Share on other sites More sharing options...
Caleb Posted February 19, 2011 Share Posted February 19, 2011 (edited) Well there haven't been too many Isotelus, so here's an Isotelus simplex from the Platteville Formation of Southwest Wisconsin. This is it's good side. Edited February 19, 2011 by Caleb Caleb Midwestpaleo.com Link to comment Share on other sites More sharing options...
piranha Posted February 19, 2011 Share Posted February 19, 2011 Well there haven't been too many Isotelus, so here's an Isotelus simplex from the Platteville Formation of Southwest Wisconsin. This is it's good side. Sweet Caleb !! You have the rarest and bestest bugs from North America ... PERIOD !! Link to comment Share on other sites More sharing options...
Caleb Posted February 20, 2011 Share Posted February 20, 2011 Sweet Caleb !! You have the rarest and bestest bugs from North America ... PERIOD !! Thanks!! I sure do love collecting them. Caleb Midwestpaleo.com Link to comment Share on other sites More sharing options...
pleecan Posted February 20, 2011 Share Posted February 20, 2011 Trilobite from Morocco Ordovician Lagerstatte: I am hoping our distinguish members to assist on the ID.... as my knowledge on various trilobites... very poor to extremely poor... part Counter part Link to comment Share on other sites More sharing options...
pleecan Posted February 20, 2011 Share Posted February 20, 2011 This tantalizing thread has morphed into a magnificent menagerie of trilobite treasures. Great thanks to PzF for the wisdom to launch it with his amazing soft-bodied Triarthrus (5) !! I present Koneprusia, another spiny ondontopleurid for your weekend viewing pleasure. Also check these two TOP examples with tiny thorns preserved on the spines. LINK ENJOY !!! Koneprusia brutoni 1-1/2" (4cm) Devonian - Jbel Oufaten, Morocco Scott: Wow is that ever cool... alien bug !!!! Link to comment Share on other sites More sharing options...
pleecan Posted February 20, 2011 Share Posted February 20, 2011 Well there haven't been too many Isotelus, so here's an Isotelus simplex from the Platteville Formation of Southwest Wisconsin. This is it's good side. nice! Link to comment Share on other sites More sharing options...
piranha Posted February 21, 2011 Share Posted February 21, 2011 Trilobite from Morocco Ordovician Lagerstatte: I am hoping our distinguish members to assist on the ID.... as my knowledge on various trilobites... very poor to extremely poor... Hi Peter, Thanks for showing us your beautiful and bizarre trilobite !! It appears to be a protopliomerid. I've never seen one before. Link to comment Share on other sites More sharing options...
pleecan Posted February 21, 2011 Share Posted February 21, 2011 Thanks for the ID Scott. I don't think I can even pronounce that name... so I take it as this trilobite is not that common... I think my little hamster brain is beginning to hurt.... Link to comment Share on other sites More sharing options...
piranha Posted February 21, 2011 Share Posted February 21, 2011 (edited) Thanks for the ID Scott. I don't think I can even pronounce that name... so I take it as this trilobite is not that common... I think my little hamster brain is beginning to hurt.... Hopefully the right subfamily anyway ... which one looks like the best match ?? EDIT: Sorry missed your question Peter ... this one doesn't ring a bell for me ... RARE BUG!! Edited February 21, 2011 by piranha Link to comment Share on other sites More sharing options...
pleecan Posted February 21, 2011 Share Posted February 21, 2011 (edited) Hopefully the right subfamily anyway ... which one looks like the best match ?? EDIT: Sorry missed your question Peter ... this one doesn't ring a bell for me ... RARE BUG!! Thanks very much for the compartive info Scott. Picture closer matches Hintzeia or Pliomeriodes or Protopliomerops.... based on pygidium proportions and degree of curvature (differs from Protopliomerella less curved projections). The gabella Protopliomerops too rectangularish but Hintzeia gabella more closely matches.... so me thinks trilo is similar to Hintzeia I just sent Sam Gon III a picture for an ID.... not sure if he will respond...we will see.... PL Edited February 21, 2011 by pleecan Link to comment Share on other sites More sharing options...
pleecan Posted February 21, 2011 Share Posted February 21, 2011 (edited) Sam responded... " The similarities to the Ordovician Moroccan genus Lehua are strong. I think the thoracic and pygidial pleural spines might be either missing or not yet exposed in prep. Take a look at google images of Lehua and see if you donʻt agree with the tentative diagnosis... " http://www.fossilmal...32/mtrilo32.htm http://www.fossilmus...Anacheirurs.htm http://www.fossilmuseum.net/Fossil_Galleries/TrilobitesMorocco/Lehua-ponti/Lehua.htm PL Edited February 21, 2011 by pleecan Link to comment Share on other sites More sharing options...
pleecan Posted February 21, 2011 Share Posted February 21, 2011 JB reply: "There's a problem with trilobites, though... the fauna is basically undescribed! There are dozens of new species in the fezouata, but complete ones for most species are relatively rare and expensive. There are people starting to work on it, though, notably Muriel Vidal and (now and then) Richard Fortey. This is one that I'm pretty sure doesn't yet have a name, although in Peter Van Roy's thesis there is something very like it labelled as a cheirurine phacopid (which is certainly what it appears to be). You'll probably find if you prep it a bit that the pleurae are elongated into long spines... I can see the base of one or two, I think" PL. Link to comment Share on other sites More sharing options...
Dicranurus Posted February 21, 2011 Share Posted February 21, 2011 Here is my top 4 favorite trilobites from my collection. Sphaerocoryphe thompsoni Reed, 1901 Ordovician, Ashgill Series, Girvan, Ayrshire, Scotland, UK Lloydolithus lloydi Murchison, 1839 Ordovician, Llandeilo Series, Meadowtown, Shropshire, UK. Cyphaspis carrolli Lower Devonian Haragan Formation, Coal County, Oklahoma, USA. Walliserops trifurcates Morzadec, 2001 Devonian. Foum Ziguid, Zagora, Morocco. "It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living." -Sir David Attenborough Link to comment Share on other sites More sharing options...
piranha Posted February 21, 2011 Share Posted February 21, 2011 Here is my top 4 favorite trilobites from my collection. Sphaerocoryphe thompsoni Reed, 1901 Ordovician, Ashgill Series, Girvan, Ayrshire, Scotland, UK Hi Dicranurus, Thank you for showing us your fantastic trilobites. The Sphaerocoryphe is my favorite of the TOP four !! Link to comment Share on other sites More sharing options...
piranha Posted February 21, 2011 Share Posted February 21, 2011 Hi Peter, This trilobite will not be classified very easily as Joe points out. I should have been more clear about the figured trilobites coming from the treatise volume from 1959 Moore et al., not the best source for a difficult taxonomic riddle such as this. I offered it to discover the subfamily as a jumping off point in the right direction. Sorry for being vague to any degree, for now the best we can say is similar to .... and fill in the blanks. I don't see the parallel for Lehua as a possibility. Too many features are incorrect in my opinion. Even assuming your specimen to be a juvenile form, the third link you provided shows that genal spines should be indicated for that stage of development. Perhaps an earlier meraspid stage will verify the absence but your trilobite did not have genal spines. Further speculation that thoracic/pygidial spines are missing or could reveal with additional prep appears unlikely. Additionally, the broad glabellar furrows, larger eye/eye-ridge and peculiar truncated pygidium tend more to the protopliomerid type trilobites. It's all one big happy Family Cheiruridae at the end of the day. I'll forward this one to my friend who is a top specialist with literally every trilobite paper that has ever been published and thousands of species in his collection to reference from. I'll report back with his evaluation and any relevant publications cited. Link to comment Share on other sites More sharing options...
pleecan Posted February 21, 2011 Share Posted February 21, 2011 Hi Peter, This trilobite will not be classified very easily as Joe points out. I should have been more clear about the figured trilobites coming from the treatise volume from 1959 Moore et al., not the best source for a difficult taxonomic riddle such as this. I offered it to discover the subfamily as a jumping off point in the right direction. Sorry for being vague to any degree, for now the best we can say is similar to .... and fill in the blanks. I don't see the parallel for Lehua as a possibility. Too many features are incorrect in my opinion. Even assuming your specimen to be a juvenile form, the third link you provided shows that genal spines should be indicated for that stage of development. Perhaps an earlier meraspid stage will verify the absence but your trilobite did not have genal spines. Further speculation that thoracic/pygidial spines are missing or could reveal with additional prep appears unlikely. Additionally, the broad glabellar furrows, larger eye/eye-ridge and peculiar truncated pygidium tend more to the protopliomerid type trilobites. It's all one big happy Family Cheiruridae at the end of the day. I'll forward this one to my friend who is a top specialist with literally every trilobite paper that has ever been published and thousands of species in his collection to reference from. I'll report back with his evaluation and any relevant publications cited. Thank you Scott! That would be super. I just got a message a few minutes ago from the ROM and they are also in agreement with you of the opinion it is not a Lehua. Best Regards, Peter Link to comment Share on other sites More sharing options...
piranha Posted February 21, 2011 Share Posted February 21, 2011 Thank you Scott! That would be super. I just got a message a few minutes ago from the ROM and they are also in agreement with you of the opinion it is not a Lehua. Best Regards, Peter Not much to report unfortunately Peter. The possibility of Lehua should however remain in the discussion. It appears this group is not very well described ontogenetically. Adding to the difficulty is the weathered preservation of the adult examples. Often the very small ones are better preserved. Considering the small size of your trilobite an early meraspid stage with unformed genal spines and unformed elongated thoracic/pygidial spines is possible. Coincidentally my friend is presently sorting out the Devonian equivalent. Great trilobite Peter, thanks for sharing it with us !! Vela, Joan Antoni & Corbacho, Joan 2007. A New Especies of Lehua from Lower Ordovician of Dra Valley of Morocco. [una nueva especie de Lehua del Ordovícico inferior del Valle del Dra (Marruecos).] Batalleria 13:75-80 Lehua adseri Vela, Joan Antoni 2007. Three New Species of Lehua from the Lower Ordovician of Dra Valley. Scripta Musei Geologici Seminarii Barcinonensis, Series Palaeontologica 4:24-37 Lehua colli, orbachoi, ponti Corbacho, Joan 2008. Nuevas especies de Lehua del Ordovícico inferior del Valle de Dra (Marruecos). Scripta Musei Geologici Seminarii Barcinonensis, Series Palaeontologica 5:3-13 Lehua iannacconei, tahirii, velai; Link to comment Share on other sites More sharing options...
pleecan Posted February 21, 2011 Share Posted February 21, 2011 Not much to report unfortunately Peter. The possibility of Lehua should however remain in the discussion. It appears this group is not very well described ontogenetically. Adding to the difficulty is the weathered preservation of the adult examples. Often the very small ones are better preserved. Considering the small size of your trilobite an early meraspid stage with unformed genal spines and unformed elongated thoracic/pygidial spines is possible. Coincidentally my friend is presently sorting out the Devonian equivalent. Great trilobite Peter, thanks for sharing it with us !! Vela, Joan Antoni & Corbacho, Joan 2007. A New Especies of Lehua from Lower Ordovician of Dra Valley of Morocco. [una nueva especie de Lehua del Ordovícico inferior del Valle del Dra (Marruecos).] Batalleria 13:75-80 Lehua adseri Vela, Joan Antoni 2007. Three New Species of Lehua from the Lower Ordovician of Dra Valley. Scripta Musei Geologici Seminarii Barcinonensis, Series Palaeontologica 4:24-37 Lehua colli, orbachoi, ponti Corbacho, Joan 2008. Nuevas especies de Lehua del Ordovícico inferior del Valle de Dra (Marruecos). Scripta Musei Geologici Seminarii Barcinonensis, Series Palaeontologica 5:3-13 Lehua iannacconei, tahirii, velai; D from the ROM is an arthropod expert said the same thing Scott! " early meraspid stage " due to the over all proportions which make diagnostics even more complicated. Scott you surely know your trilobites! Appreciate your analysis. Thanks. Peter Link to comment Share on other sites More sharing options...
piranha Posted February 24, 2011 Share Posted February 24, 2011 Another odontopleurid, a Dicranurus from Oklahoma. Dicranurus hamatus elegantus 2" (5cm) Lower Devonian - Haragan Fm Coal County, Oklahoma Link to comment Share on other sites More sharing options...
alopias Posted February 24, 2011 Share Posted February 24, 2011 the Dicranurus is truly a nice trilobite you have some very nice trilobite in your collection Link to comment Share on other sites More sharing options...
xonenine Posted February 24, 2011 Share Posted February 24, 2011 woe is me, for there seems to be hardly any Harpetida to be had here... "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus Link to comment Share on other sites More sharing options...
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