Micah Posted May 16, 2017 Share Posted May 16, 2017 I recently found a formation of what I believe to be offshore shale near Auburn, Nebraska that I'm unsure of the age of and am trying to determine what type of inarticulate brachiopod I found there. I'm leaning towards L. Carbonaria, but O. Missouriensis and C. modesta are also possibilities. Any help getting a positive ID would be appreciated! Link to comment Share on other sites More sharing options...
piranha Posted May 16, 2017 Share Posted May 16, 2017 3 minutes ago, Micah said: ...I'm leaning towards L. Carbonaria, but O. Missouriensis and C. modesta are also possibilities. Any help getting a positive ID would be appreciated! Why such a cryptic post? A lot of people will have no idea which genera you are referencing. Link to comment Share on other sites More sharing options...
Micah Posted May 16, 2017 Author Share Posted May 16, 2017 Apologies, that is a bit cryptic... was in a hurry to post it. 43 minutes ago, piranha said: Why such a cryptic post? A lot of people will have no idea which genera you are referencing. This time with the genus: do y'all think these are Crania modesta, Orbiculoidea missouriensis, Lingula carbonaria, or am I way off and they're something completely different? Link to comment Share on other sites More sharing options...
Herb Posted May 17, 2017 Share Posted May 17, 2017 Orbiculoidea missouriensis, would be my guess "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...
Micah Posted May 17, 2017 Author Share Posted May 17, 2017 Maybe an easier question would be "Does anyone know of a resource I could use to compare/figure it out?" I've been digging around online and haven't found anything useful. Link to comment Share on other sites More sharing options...
doushantuo Posted May 17, 2017 Share Posted May 17, 2017 Link to comment Share on other sites More sharing options...
doushantuo Posted May 17, 2017 Share Posted May 17, 2017 Link to comment Share on other sites More sharing options...
doushantuo Posted May 17, 2017 Share Posted May 17, 2017 O. patelliformis Link to comment Share on other sites More sharing options...
Micah Posted May 18, 2017 Author Share Posted May 18, 2017 Did a bit more digging (on the internet rather than outside sadly) and I'm pretty sure they are Orbiculoidea missouriensis which would put the shale at middle Pennsylvanian I believe. Thanks for the help! Link to comment Share on other sites More sharing options...
FossilDAWG Posted May 18, 2017 Share Posted May 18, 2017 If you can find a copy, the most definitive reference for your question is likely: DUNBAR, C.O. & G.E. CONDRA. 1932. Brachiopoda of the Pennsylvanian System in Nebraska. Nebraska Geological Survey Bulletin 5:1-377. I did not find a pdf available online; you may have to check out a university library to find a hard copy to scan or photocopy. Don Link to comment Share on other sites More sharing options...
doushantuo Posted May 18, 2017 Share Posted May 18, 2017 I hesitate to point out the revisions,eg. on Juresania Link to comment Share on other sites More sharing options...
westcoast Posted May 18, 2017 Share Posted May 18, 2017 7 hours ago, Micah said: Did a bit more digging (on the internet rather than outside sadly) and I'm pretty sure they are Orbiculoidea missouriensis which would put the shale at middle Pennsylvanian I believe. Thanks for the help! I don't think this brachiopod is useful as a zone fossil as it has quite an age range from carboniferous to permian. Link to comment Share on other sites More sharing options...
Micah Posted May 18, 2017 Author Share Posted May 18, 2017 4 hours ago, westcoast said: I don't think this brachiopod is useful as a zone fossil as it has quite an age range from carboniferous to permian. You're correct, haha never trust just one online resource... Link to comment Share on other sites More sharing options...
abyssunder Posted May 18, 2017 Share Posted May 18, 2017 I'm not familiar with your area, also, I haven't the document mentioned by Don, but if it helps, here is a plate with Orbiculoidea, including Orbiculoidea missouriensis which looks similar to your specimens: M. A. Torres-Martinez, F. Sour-Tovar. 2016. Braquiópodos discínidos (Lingulida, Discinoidea) de la Formación Ixtaltepec, Carbonífero del área de Santiago Ixtaltepec, Oaxaca. Boletín de la Sociedad Geológica Mexicana Volumen 68, núm. 2, pp.313-321 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
doushantuo Posted May 18, 2017 Share Posted May 18, 2017 http://snr.unl.edu/data/geologysoils/fossils/nebrinverthughes.aspx Link to comment Share on other sites More sharing options...
doushantuo Posted May 18, 2017 Share Posted May 18, 2017 http://snr.unl.edu/data/geologysoils/fossils/nebrinvertkiewitz-brachiopods.aspx Link to comment Share on other sites More sharing options...
doushantuo Posted May 18, 2017 Share Posted May 18, 2017 Some of you may find this one useful cover: Link to comment Share on other sites More sharing options...
doushantuo Posted May 18, 2017 Share Posted May 18, 2017 the new taxa in Dunbar/Condra: This study covers the brachiopods of the northern Mid-Continent region, of which 43 genera, 133 sp. and vars. are recognized. Of these the following genera are new: TRIGONOGLOSSA (p.35) (Lingulidae), type T. nebrascensis* (Lingula scotia var. n. Meek) (p.37) ; DERBYOIDES (p.114) (Strophomenidae), type D. nebrascensis* (p.115) ; MESOLOBUS (p.159) (Chonetidae), type M. mesolobus (Chonetes m. Norwood & Pratten) (p.161); LISSOCHONETES (p.169) (Chonetidae), type L. geinitzianus (Chonetes geinitziana Waagen) (p.170) ; LEPTOLOSIA (p.260) (Productidae), type Strophalosia scintilla Beecher, including L. spondyliformis* (Aulosteges s. White & St. John) (p.262) ; WELLERELLA (p.286) (Camarotoechiidae), type W. tetrahedra* (p. 291), including W. osagensis* (Rhynchonella o. Swallow) (p.288). New spp. and varieties are: Trigonoglossa kentuckyensis* (p.39), Schizophoria oklahomae* (p.58), Derbya crassa v. subcircularis* (p.84), D. c. var. texana* (p.84), D. deercreekensis* (p.90), D. hooserensis* (p.92), D. h. var. elliptica* (p.94), D. wabaunseensis* (p.95), D. ciscoensis* (p.104), D. plattsmouthensis* (p.106), D. jacksboroensis* (p.108), D. kansasensis* (p.109), D. haesitans* (p.110), Meekella striatocostata with vars. grandicosta* (p.129), ventricosa* (p.130), and convexicosta* (p.131), Orthotetina kansasensis* (p.132), Chonetes granulifer v. transversalis* (p. 145), Cnonetina(?) rostrata* (p.150), C. flemingi with vars. alata* (p.154), plebeia* (p.156), and crassiradiata* (p.157), Mesolobus mesolobus v. lioderma* (p.164), Lissochonetes geinitzianus with vars. plattsmouthensis* (p. 173), geronticus* (p.174), and senilis* (p.175), Juresania ovalis* (p.200), Echinoconchus semipunctatus v. knighti* (p.208), E. moorei* (p.209), Krotovia meeki* (p.211), Dictyoclostus portlockianus v. crassicostatus* (p.217), D. americanus* (p.218), Marginifera muricatina* (Productus muricatus Nor. & Prat., preocc.) (p.222), M. wabashensis v. armata* (p.237), M. hystricula* (p.238), M. fragilis* (p.239), Linoproductus magnispinus* (p. 244), L. carinatus* (p.248), L. canalis* (p.250), L. oklahomae* (p.251), L. platyumbonus* (p.254), L. meniscus* (p.255), Leptalosia ovalis* (p.263), Wellerella osagensis v. immatura* (p.290), W. truncata* (p.292), W. delicatula* (p.293), W. dekalbensis* (p.294), Cryptacanthia whitei* (p.310), Spirifer matheri* (p.322), Neospirifer triplicatus with vars. alatus* (p.332) and gibbosus* (p. 333), N. latus* (p.336), Ambocoelia expansa* (p.348), Composita elongata* (p.371), C. trilobita* (p.372). All the old spp. are fully descr. and illustrated. Derbya crassa v. richmonda* (Orthis r. McChesney) (p.83) ; D. bennetti v. broadheadi* (D. broadheadi Hall & Clarke) (p.89) ; D. multistriata* (Orthisina umbraculum var. m. Meek & Hayden) (p.101) ; Chonetes granulijer v. meekanus* (C. meekanus Girty) (p.143). The subg. of Chonetes, Tornquistia Paeckelmann, emend. descr., is raised to generic rank. Marginifera missouriensis* (M. muricata v. m. Girty) (p.224); Linoproductus missouriensis* (Productus insinuatus v. m. Sayre) (p.252). The following specific names long neglected are revived in new combinations: Schuchertella pratteni* (Orthis p. McChesney) (p.117), Chonetina flemingi* (Chonetes f. Nor. & Prat.) (p.151), Dictyoclostus portlockianus* (Productus p. Nor. & Prat.) (p.215), Linoproductus prattenianus* (Productus prattiananus Nor. & Prat.) (p.241), Cancrinella boonensis* (Productus b. Swallow = P. pertenuis Meek & Hayden) (p.258), and Neospirifer kansasensis* (Spirifer camerata v. k. Swallow) (p.337). The discussion of the Productidae includes a key to the genera and a demonstration of the mode of origin and growth of the spines. For the first time the dorsal valve of Poikilosakos is descr. Link to comment Share on other sites More sharing options...
abyssunder Posted May 18, 2017 Share Posted May 18, 2017 I think, Lingula is more elongated and flattened in shape than Orbiculoidea. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Micah Posted May 19, 2017 Author Share Posted May 19, 2017 6 hours ago, doushantuo said: Some of you may find this one useful cover: This is a fantastic broad overview of nebraska's fossils. Thank you! Link to comment Share on other sites More sharing options...
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