xonenine Posted February 18, 2015 Posted February 18, 2015 I don't know this trilobite species, and clueless on the second photo... (though visions of juvenile trilos are always running through my head...) the Trilobite is 3.5 cm, the unknown fossils are .5 cm each. thanks for any help, Carmine "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
JustPlainPetrified Posted February 18, 2015 Posted February 18, 2015 Could #2 photo be trilobites displaying enrollment?
Auspex Posted February 18, 2015 Posted February 18, 2015 Agnostids, maybe? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease!
JimB88 Posted February 18, 2015 Posted February 18, 2015 ~.JPG Agnostids, maybe? that would be my guess as well
xonenine Posted February 18, 2015 Author Posted February 18, 2015 (edited) see, those visions of juveniles clouded my judgement, agnostids didn't even occur to me, seeing what I hope to see and all... Edited February 18, 2015 by xonenine "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
Fossildude19 Posted February 18, 2015 Posted February 18, 2015 I think it looks more like a brachiopod, but I am clueless in the middle Cambrian. I think we need to hear from Scott! Piranha, ... paging Piranha! Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me
Seaforth Posted February 18, 2015 Posted February 18, 2015 Brachiopods were my first thought too, but Agnostids makes sense too
xonenine Posted February 18, 2015 Author Posted February 18, 2015 I wondered that also Tim, there are a few others scattered around on these matchbook sized chips of rock, I'll shoot a few more, and another box of samples came with some nice small almost complete Olenellus, so I'm sure to look some more... "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
xonenine Posted February 18, 2015 Author Posted February 18, 2015 perhaps this photo is better... "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
Auspex Posted February 18, 2015 Posted February 18, 2015 I think it looks more like a brachiopod... This was my first thought as well, but one is suggestive of a cephalon, and another is suggestive of a pygidium; the difference in the details swayed me. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease!
DeepTimeIsotopes Posted February 18, 2015 Posted February 18, 2015 Agnostids is my guess. Each dot is 50,000,000 years: Hadean............Archean..............................Proterozoic.......................................Phanerozoic........... Paleo......Meso....Ceno.. Ꞓ.OSD.C.P.Tr.J.K..Pg.NgQ< You are here Doesn't time just fly by?
piranha Posted February 19, 2015 Posted February 19, 2015 The trilobite in the first photo looks very similar to Kochina? walcotti. Sundberg, F.A., & McCollum, L.B. (2000) Ptychopariid Trilobites of the Lower-Middle Cambrian Boundary Interval, Pioche Shale, Southeastern Nevada. Journal of Paleontology, 74:604-630 The attached photo is credited to the Western Trilobite Association Pioche Shale faunal list: LINK The small ones don't look like agnostids. Agnostids also have an axial lobe just like more typical trilobite forms. Additionally, the Pioche Shale only has one genus in the Agnostida and it's an eodiscid (Pagetia) with very different morphology. The Pioche Shale has a lot of small inarticulate brachiopods to look at in this paper: Rowell, A.J., (1980) Inarticulate brachiopods of the Lower and Middle Cambrian Pioche Shale of the Pioche District, Nevada. The University of Kansas Paleontological Contributions, 98:1-34 OPEN ACCESS PDF 2
xonenine Posted February 19, 2015 Author Posted February 19, 2015 thanks a million Scott, I will enjoy both the link and PDF! Carmine "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
xonenine Posted February 20, 2015 Author Posted February 20, 2015 the PDF is very instructive, thanks again Scott. Hadrotreta primaaea primaaea is my favoured candidate, I will look for a few in better condition to shoot as well. (photo credited to: Rowell, A.J., (1980) Inarticulate brachiopods of the Lower and Middle Cambrian Pioche Shale of the Pioche District, Nevada. The University of Kansas Paleontological Contributions, 98:1-34) 1 "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
Auspex Posted February 20, 2015 Posted February 20, 2015 Not quite the same, IMO: "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease!
piranha Posted February 20, 2015 Posted February 20, 2015 They share similar features with this acrotretid (Acrotreta) brachiopod from Walcott 1912. Walcott, C.D. (1912) Cambrian Brachiopoda. United States Geological Survey, 51(1):1-872 (text) 51(2):1-363 (plates) 1
xonenine Posted February 20, 2015 Author Posted February 20, 2015 thanks again Scott "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus
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