andyrice11 Posted May 23, 2017 Share Posted May 23, 2017 The fossil(s) in question here were collected during the summer of 2016 from the Liston Creek Limestone (Silurian) in northern Indiana. I am using them for my senior thesis project in which I'll be comparing Ordovician trilobites with Silurian Trilobites. Anyways, I have been taking a scientific illustration class during the month of May and for my final project I decided to do a stippled illustration of one of the Cheirurus cephalons I collected in 2016 (in total i have about 7 cephalons of varying sizes, all with identical morphological characteristics). I've been trying to narrow this particular specimen down to the species level since I plan include the binomial nomenclature on my final illustration. After a days worth of researching I'm still unable to confidently identify the specimen at the species level. The literature I have on the rock formation this specimen comes from lists Cheirurus niagarensis among the common fauna. From what I've seen online, I don't think my specimen is C. niagarensis. Two other possibilities I've noted are; C. infensus, and C. insignis... So far those are the only 3 Cheirurus species that resemble my specimen the closest, but I'm still not confident in any one of them in particular. As fossil ID information is notoriously hard to find on the internet I've decided to post some pics of my specimen on here to see if anyone can help me to ID it. The first 5 pics are of the specimen I'm using for my illustration. The 6th picture is of the previously mentioned specimen (right) and a larger specimen (left). Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 would the Lane thesis be helpful? Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 17 minutes ago, doushantuo said: would the Lane thesis be helpful? I'm not sure exactly what you mean by that? Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 well,it's old,and on cheirurids Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 Just now, doushantuo said: well,it's old,and on cheirurids I'm still a bit confused haha! What exactly is the "lane thesis" you mentioned? Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 5 minutes ago, doushantuo said: Awesome!! Do you happen to have a link to the full report? Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 lane edit: sorry lane2 Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 Just now, doushantuo said: lane Thank you so much!!! Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 tril Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 kobay Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 4 minutes ago, doushantuo said: tril 4 minutes ago, doushantuo said: kobay All 3 of these seem like some wonderful resources! I will be sure to bookmark them right away! Thank you so much for the help! Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 26 minutes ago, doushantuo said: lane edit: sorry lane2 So after looking through the plates at the end of this document I would say that the new leading contender for my specimen ID is Bartoninus elongatus (Plate 9). This is of course based solely on morphological similarities.. I have yet to read what the document has to say about this particular species. Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 not Ceraurinella? Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 trip Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 4 minutes ago, doushantuo said: not Ceraurinella? I would say that is a very strong possibility as well! Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 8 minutes ago, doushantuo said: not Ceraurinella? Does Ceraurinella = Bartoninus ? Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 yep,think so Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 Just now, doushantuo said: yep,think so cool! oh the joys of old nomenclature! Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 I always check for revision. Somwhere down the line Piranha will have a say in this. He's way more knowledgable about trilobites than I am Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 old taxo: Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 7 minutes ago, doushantuo said: I always check for revision. Somwhere down the line Piranha will have a say in this. He's way more knowledgable about trilobites than I am You seem pretty knowledgeable yourself! I appreciate all the tremendous links you've shared Link to comment Share on other sites More sharing options...
doushantuo Posted May 23, 2017 Share Posted May 23, 2017 mwah,compared to Piranha(and maybe some others) I'm small fry,peanuts really. The guy is amazing when it comes to trilobitology . Trilobitewise,I'm more into paleo-ecology*/taphonomy,biogeography than systematics If it has to be systematics,than preferably incorporating advanced methods *as an example wiment.pdf Link to comment Share on other sites More sharing options...
andyrice11 Posted May 23, 2017 Author Share Posted May 23, 2017 Well hopefully he comes across this post then haha! Link to comment Share on other sites More sharing options...
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