Search the Community
Showing results for tags 'bear gulch'.
-
From the album: Invertebrates
Polychaeta non det. Early Carboniferous Serphukovian Heath Formation Bear Gulch Montana USA -
From the album: Invertebrates
Typhloesus wellsi Melton & Scott, 1973 Early Carboniferous Serpukhovian Heath Formation Bear Gulch Montana USA In the beginning, it used to be believed that Typhloesus were conodont animals, a group of extinct agnathan vertebrates. The conodont teeth however were actually located in the gut contents of the Typhloesus, meaning that while it wasn't a conodont, they were a part of its diet. A new paper published revealed several potential mollusk-like features of the animal. -
From the album: Vertebrates
Acanthodes lundi Zidek, 1980 Lower Carboniferous Serpukhovian Heath Formation Bear Gulch Montana USA -
From the album: Misha's Carboniferous
Cardiosuctor populosum Coelacanth late Mississippian Bear Gulch Limestone The matrix of this specimen is a bit unusual and not typical of what I've seen from most other Bear Gulch fossils, does anyone know why this might be? I'm assuming it might be a specific layer within the Lagerstätte which is also rich in Coelacanths as the only other fossils I've been able to find online in similar dark colored matrix from Bear Gulch with the same type of preservation are also Cardiosuctor specimens. The dark color of both matrix and fossil make it a bit difficult to distinguish some of the features, but there's some good preservation of skull elements, the vertebral column, fins and some scales around the specimen. generously gifted to me by my friend @Dean Ruocco- 1 comment
-
- 4
-
-
- bear gulch
- coelacanth
- (and 2 more)
-
Hi all, I've had this fossil laying around for a while now, it's some kind of paleoniscid actinopterygian from the Bear Gulch Limestone in Montana USA, Mississippian in age. It's mostly preserved as an impression on a very thin piece of limestone which I framed in a 3D printed frame to make sure it doesn't fall and break, a little bit of the actual material is left but not much, it still has some nice details preserved, you can see all the fin rays, scales and classic actinopterygian skull ornamentation. I am not particularly interested in keeping this piece, and I know the quality isn't particularly great but this material doesn't pop up too often online so I thought maybe someone here on TFF would like it and give it a better home. I haven't done a trade in a while so I thought if someone's interested it could be fun, I'm not looking for anything crazy, just any interesting Paleozoic fossils Thanks for looking! Misha
-
Belotelson magister (Packard, 1886) from Bear Gulch
oilshale posted a gallery image in Member Collections
From the album: Invertebrates
Belotelson magister (Packard, 1886) Lower Carboniferous Serpukhovian Heath Shale Formation Bear Gulch, Fergus County Montana USA -
From the album: Invertebrates
Perimecturus rapax Schram & Horner, 1978 Carboniferous Serpukhovian Heath Shale Formation Bear Gulch, Fergus County Montana USA References: Ronald A. Jenner; Cees H.J. Hof; Frederick R. Schram (1998): Palaeo- and Archaeostomatopods (Hoplocarida: Crustacea) from the Bear Gulch Limestone, Mississippian (Namurian), of central Montana. Contributions to Zoology, 67 (3) 155-186. Link (04.2013): http://dpc.uba.uva.nl/ctz/vol67/nr03/art01 FREDERICK R. SCHRAM (2007): PALEOZOIC PROTO-MANTIS SHRIMP REVISITED. Journal of Paleontology, September 2007, v. 81, p. 895-916. Haug et al. (2010): Evolution of mantis shrimps (Stomatopoda, Malacostraca) in the light of new Mesozoic fossils. BMC Evolutionary Biology 2010, 10:290 Link (04.2013): http://www.core-orsten-research.de/Publications/PDF_Paper/ulm_team/2010%20Haug_JT_etal%20BMC%20Stomatopod%20Phyl.pdf Schram (1969): Some Middle Pennsylvanian Hoplocarida (Crustacea) and their phylogenetic significance. Fieldiana, Geology, Vol.12, No.14 Link (04.2013): http://archive.org/details/somemiddlepennsy1214schr -
From the album: Invertebrates
Sairocaris centurion Schram & Horner, 1978 Carboniferous Serpukhovian Heath Shale Formation Bear Gulch, Fergus County Montana USA -
From the album: Vertebrates
Fubarichthys prolatus Lowney, 1980 Lower Carboniferous Serpukhovian Heath Shale Formation Bear Gulch, Fergus County Montana USA -
Taxonomy from Fossilworks.org Etymology: The name is in honor of the French artist Henri de Toulouse-Lautrec. Diagnosis from Lund and Poplin 1997, p. 473: “Wendyichthys with the following characters: operculum-suboperculum contact loose; maxilla with postero-ventral angle moderate; dorsal process of cleithrum sharply pointed, vertical and poorly articulated with the supracleithrum; scaled axis of caudal fin at low angle to the body axis; eight predorsal and precaudal scutes; no fin guard scales." Reconstruction from Lund and Poplin 1997, p. 475: References: R. Lund and C. Poplin (1997). The Rhadinichthyids (paleoniscoid actinopterygians) from the Bear Gulch limestone of Montana (USA, Lower Carboniferous). Journal of Vertebrate Paleontology 17(3):466-486.
-
‘Alien goldfish’ may have been a pelagic gastropod (Typhloesus wellsi, Carboniferous, Bear Gulch Limestone)
Oxytropidoceras posted a topic in Fossil News
‘Alien goldfish’ may have been unique mollusc, say scientists Nicola Davis, The Guardian, September 22, 2022 New clue found in 'alien goldfish' suggests it may have been a mollusk by Bob Yirka , Phys.org The open access paper is: Conway Morris, S. and Caron, J.B., 2022. A possible home for a bizarre Carboniferous animal: is Typhloesus a pelagic gastropod?. Biology Letters, 18(9), p.20220179. Another paper: Conway Morris, S., 1990. Typhloesus wellsi (Melton and Scott, 1973), a bizarre metazoan from the Carboniferous of Montana, US A. Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 327(1242), pp.595-624. Yours, Paul H.-
- 1
-
-
- bear gulch
- bear gulch limestone
- (and 4 more)
-
Female, head disarticulated and displaced. The fish is embedded in a mass of filamentous algae. Alternative combination: Physonemus falcatus. "The genus Physonemus was originally erected for P. arcuatus by McCoy (1848) to receive elegant forwardly-curved, well omamented Paleozoic fin spines of unknown affìnities ... The Paleozoic fin spine Physonemus falcatus St. John and Worthen 1883, from the Valmeyeran St. Louis Limestone of St. Louis, Missouri, has been found on sexually mature males of a small, highly sexually dimorphic chondrichthyan from the Chesterian Bear Gulch Limestone of Montana" (Lund 1985, p.1). Diagnosis from Lund 1985, p.3: “Small sharks, maximum known size 145 mm fork length, with forwardly-curved spines, inclined at mean angle of 14.5 degrees to the horizontal. Neither spine nor first dorsal fin present on juveniles below 124 mm length, nor on females. Males with elongate rostrum, denticles covering dorsum of rostrum, cranium and dista] portion of dorsal rod, females with short rostrum and devoid of denticles. Teeth delicate, cladodont, tooth whorls of larger, non-cladodont teeth external to jaws. Pectoral fin with five prearticular basals, a metapterygium bearing six radials, and an axis of seven elements with only one radial. Pelvic girdle supports 8—10 radials; clasper of male consisting of 6—8 axials and a three-part mixopterygium. Second dorsal fin of 12—14 well spaced radials followed by a triangular basal plate, l9—21 distal radials. Axial skeleton of 44 precaudal segments, 18 preural caudals and 16—18 ural caudals. Caudal fin deeply forked, equilobate, with no radials between dorsal and ventral lobes.” Line drawing from Lund 1985, p. 13: References: St. John, O. H. and Worthen, A. H. (1875). Descriptions of fossil fishes. Geological Survey of Illinois 6:245—488. St. John, O. H. and Worthen, A. H. (1883). Descriptions of fossil fishes; a partial revision of the Cochliodonts and Psammodonts. Geological Survey of Illinois 7:55—264. Lund, Richard (1985). The morphology of Falcatus falcatus (St. John and Worthen), a Mississippian stethacanthid chondrichthyan from the Bear Gulch Limestone of Montana, Journal of Vertebrate Paleontology, 5:1-19, DOI: 10.1080/02724634.1985.10011842.
-
Does anyone have any idea what kind of brachiopod this could be? I'm sure we can't identify the species, but maybe the family or even the genus? Carboniferous Serpukhovian Bear Gulch Montana
- 14 replies
-
- 3
-
-
- bear gulch
- brachiopoda
- (and 2 more)
-
Gordoniconus beargulchensis Mapes, Weller & Doguzhaeva 2010
oilshale posted a fossil in Coleoids (Belemnites, Squid)
Taxonomy according to Mapes et al., 2010. Identified by R. Mapes, Department of Geological Sciences, Ohio University, Athens, Ohio 45701, U.S.A. References: Mapes, R. H., Weller, E. A. & Doguzhaeva, L. A. (2010) in Cephalopods—Present and Past (eds Tanabe, K., Shigeta, Y., Sasaki, T. & Hirano, H.) 155‒170 (Tokai University Press, Kanagawa, 2010) Klug, C., Landman, N.H., Fuchs, D. et al. (2019) Anatomy and evolution of the first Coleoidea in the Carboniferous. Commun Biol 2, 280. https://doi.org/10.1038/s42003-019-0523-2 Whalen, C.D., Landman, N.H. (2022) Fossil coleoid cephalopod from the Mississippian Bear Gulch Lagerstätte sheds light on early vampyropod evolution. Nat Commun 13, 1107. https://doi.org/10.1038/s41467-022-28333-5.-
- 1
-
-
- bear gulch
- big snowy
- (and 4 more)
-
From the album: Vertebrates
Wendyichthys lautreci Lund & Poplin 1997 Lower Carboniferous Serpukhovian Heath Shale Formation Bear Gulch Montana USA -
Taxonomy from Lund 2000. Diagnosis for the genus Discoserra from Lund 2000, p. 180: "Teeth of the premaxilla, maxilla and dentary long, thin, and styliform. Posterior end of maxilla does not extend back to level of anterior margin of orbit. Parietals excluded from contact in dorsal midline by postrostral 2, which contacts supraoccipital. No transverse supratemporal commissure in supraoccipital. Two rows of paired bones over orbit. One to three interopercular bones; two to three small postspiraculars and a presupracleithrum. Branchiostegals very variable in size, number and shape. Dorsal ridge scales with small, forwardly facing hooks; two to three small anal fin hooks. Origin of anterior edge of dorsal fin set well below dorsal margin of ridge scales. All fins with well spaced rays; pelvic fin reduced, caudal fin rounded." Line drawing from Lund 2000, p. 183: Identified by oilshale using Lund 2000. References: R. Lund (2000) The new Actinopterygian order Guildayichthyiformes from the Lower Carboniferous of Montana (USA). Geodiversitas 22(2):171-206
-
- 3
-
-
- bear gulch
- big snowy group
- (and 6 more)
-
Taxonomy from fossilworks.org. Synonyms: Lingula mytiloides Meek and Worthen 1873 and Lingula umbonata White 1884. From Lutz-Garihan 1979, p. 458: "Shell small, ovate, very light colored, preserved mostly as external or internal molds of undetermined valves. Posterior margins smoothly rounding into lateral margins; greatest width at mid-length or slightly toward anterior. Convexity of valve greatest along antero-posterior line at mid-width, and at apex, convexity then decreases laterally so that cross-section is almost an upside-down V. Surface marked by closely spaced growth lines. Interior of valve not seen.” Identified by oilshale using Lutz-Garihan 1979. References: Shumard, B. F. and Swallow, G.C. (1858) Descriptions of new fossils from the Coal Measures of Missouri and Kansas. Academy of Science of St. Louis Transactions 1:198-227. Yancey, T. E. (1978) Brachiopods and mollusca of the Lower Permian Arcturus Group, Nevada and Utah, Part 1: brachiopods, scaphopods, rostroconchs, and bivalves. Bulletins of American Paleontology 74(303):257-367 Lutz-Garihan, A.B. (1979) Brachiopods from the Upper Mississippian Bear Gulch Limestone of Montana. Compte Rendu, Neuvième Congrès International de Stratigraphie et de Géologie du Carbonifère. Vol. 5: 457–467.
-
- 4
-
-
- bear gulch
- carboniferous
- (and 4 more)
-
Together with Bryozoa and other Brachiopods. Taxonomy from Fossilworks.org, From Lutz-Garihan 1979, p. 463: “ Shell small; pedicle valve with moderately well-developed ears, convexity unknown because of deformation of shells, but umbo extends somewhat beyond hinge; greatest width at mid-length of valve; ornamentation of pedicle valve consists of rugae and growth lines, some rugae enlarged as nodes occasionally, and in some specimens, some costae develop at about half the distance from posterior but are somewhat irregular; relatively thick spines along hinge and irregularly across valve. Brachial valve gently concave, with ears: surface ornamentation has a wavy appearance because of sometimes irregular growth lines and rugae; some rugae interrupted by nodes; costae irregularly developed an some brachial valves; but not extending completely to posterior; spines probably absent, some brachial valves convex at center of hinge on exterior for a minute part of length, giving appearance of a node at this position. No interior structures seen.” Identified by oilshale using Lutz-Garihan 1979. References: Girty, G. (1911) THE FAUNA OF THE MOOREFIELD SHALE OF ARKANSAS. DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY. BULLETIN 439. 1-145 Lutz-Garihan, A.B. (1979) Brachiopods from the Upper Mississippian Bear Gulch Limestone of Montana. Compte Rendu, Neuvième Congrès International de Stratigraphie et de Géologie du Carbonifère. Vol. 5: 457–467pp. Link: Browse Collections - College of Humanities and Sciences / UM Paleontology Center - University Of Montana (umt.edu)
-
- 1
-
-
- bear gulch
- carboniferous
- (and 5 more)
-
Taxonomy according to Mickle et al., 2009. The University of Montana, UM Paleontology Center website (Browse Collections - College of Humanities and Sciences / UM Paleontology Center - University Of Montana (umt.edu)) lists "Yogoniscus gulo" as an old taxon on some specimens (but not on all specimens) of Beagiascus pulcherrimus. Obviously, confusion has occurred. Diagnosis from Mickle et al., p. 639: “A lower actinopterygian fish defined by the following combination of characters: elongate fusiform body, narrow in cross section; premaxillae narrowly sutured in midline; nasal notched anteriorly and posteriorly; posterodorsal process of antorbital forms base of posterior nasal notch; frontal with a sinuous sagittal suture; crescent-shaped dermosphenotic; large dermopterotic with a wide posterior plate, laterally spurred, anteromedial process situated within a notch in the frontal; three large suborbitals situated within curve of preoperculum, small fourth suborbital overlapping large suborbital, suborbital between posteroventral infraorbital and maxilla; four infraorbitals – narrow infraorbital ventral to orbit, crescent-shaped posteroventral infraorbital, an intervening element, and T-shaped posterodorsal infraorbital, tapered anterior end of posterodorsal infraorbital comes in contact with tapered posterior end of nasal; mosaic of several small bones in curve of posterodorsal infraorbital for spiracular bone; long maxillary plate; two rows of pointed, posteriorly inclined teeth down length of maxilla; prominent posteroventral process of maxilla; anteriorly inclined hatchet shaped preoperculum; one row of 5 or 6 anteopercular bones along anterior margin of operculum – ventral-most anteopercular bone wider and longer than the others; rectangular, anteriorly inclined operculum with transverse ganoine ridges; rhombic suboperculum with vertical ganoine ridges; total of 14 or 15 branchiostegal rays – five above mandibular corner, 9 or 10 at and below mandibular corner, first branchiostegal twice as high as second; anterior and posterior extrascapular rows sharing median extrascapular (anterior row – three lateral bones, posterior-single bone bearing supratemporal commissure); unsutured postspiracular; one row of rhombic postcleithral scales; narrow ventrolateral flank scales; f ank scales finely pectinated; fan-like pectoral fin; triangular pelvic fin, triangular dorsal and anal fins with posterior edges tapering off gradually; heterocercal caudal fin deeply forked, accessory flap on epicaudal lobe; all fins bear long, stout, overlapping fringing fulcra on leading edges; precaudal ridge scales continuous between the anal and caudal, and dorsal and caudal fins. Meristic, morphometric, and cranial measurements are presented in Tables 9 to 12.” Line drawing from Mickle et al., 2009, p. 642: ID by oilshale using Mickle et al., 2009. Reference: Mickle, K. E., Lund, R. and Grogan. E. D. (2009): Three new palaeoniscoid fishes from the Bear Gulch limestone (Serpukhovian, Mississippian) of Montana (USA) and the relationships of lower actinopterygians. Geodiversitas 31(3):623-668. DOI: 10.5252/g2009n3a6
- 2 comments
-
- 3
-
-
- beagiascus
- bear gulch
- (and 6 more)
-
Taxonomy according to Schram and Horner, 1978, p. 394. Diagnosis (Schram and Horner, 1978, p. 394): "Rhinocarid of large size; carapace covered with hairlike ornament; furcae about 1 ½ times as long as the telson." Dithyrocaris rolfei, reconstruction from Schram and Horner, 1978, p. 395. Identified by oilshale using Schram and Horner, 1978. References: Schram, F. R. and Horner J. (1978): Crustacea of the Mississippian Bear Gulch Limestone of Central Montana. Journal of Paleontology 52(2):394-406. Factor D. F. and Feldmann R. M. (1985): Systematics and Paleoecology of Malacostracan Arthropods in the Bear Gulch Limestone (Namurian) of central Montana. Carnegie Museum of Natural History. 54, 319-356. Jenner, R. A., Hof, C. and Schram, F. R. (1998): Palaeo- and archaeostomatopods (Hoplocarida, Crustacea) from the Bear Gulch Limestone, Mississippian (Namurian), of central Montana. Contributions to Zoology 67 (3) 155-185.
-
- 3
-
-
- bear gulch
- carboniferous
- (and 6 more)
-
Echinochimaera snyderi belongs to the peculiar looking chimaeras (also called sea cats, ratfish or ghost sharks). Chimaeras possess two dorsal fins; the first dorsal fin is supported by a movable spine associated with a venom gland. Recent sea cats live in all oceans of the world, preferably at depths between 200 and 2000m. This juvenile specimen of Echinochimaera snyderi is most likely a female; adult males are slightly smaller and have a more curved dorsal spine. References: R. Lund. 1988. New Mississippian Holocephali (Chondrichthyes) and the evolution of the Holoceephali. In Teeth Revisited: Proceedings of the VII Int. Symp. on Dental Morph., Paris, May 1986, Russel, D.E., Santoro, J.P. and Sigogneau-Russel, D., Eds., Mem. Mus. Natn. Hist. Nat., Paris, (serie C) 53:195-205 R. Lund and E. Grogan. 2004. Five new euchondrocephalan Chondrichthyes from the Bear Gulch Limestone (Serpukhovian, Namurian E2b) of Montana, USA. In G. Arratia, M. Wilson, R. Cloutier (eds.), Recent Advances in the Origin and Early Radiation of Vertebrates 505-531
- 5 comments
-
- 5
-
-
-
- bear gulch
- carboniferous
- (and 7 more)
-
From the album: Vertebrates
Echinochimaera snyderi Lund, 1988 Lower Carboniferous Serpukhovian Bear Gulch Montana USA Lit.: Lund, R. 1988 - New Mississippian Holocephali (Chondrichthyes) and the evolution of the Holocephali. Memoires du Museum National d'Histoire Naturelle Serie C Sciences de la Terre, 53: 195-205. Lund, R. 1977 - Echinochimaera meltoni new genus and species (Chimaeriformes), from the Mississippian of Montana. Annals of Carnegie Museum, 46 (13): 195-221 -
From the album: Vertebrates
Fish non det. Early Carboniferous Serpukhovian Bear Gulch Montana USA-
- 1
-
-
- bear gulch
- carboniferous
- (and 3 more)
-
From the album: Vertebrates
Discoserra pectinodon Lund, 2000 Early Carboniferous Serpukhovian Heath shale Bear Gulch Montana USA-
- 1
-
-
- bear gulch
- carboniferous
- (and 4 more)
-
From the album: Vertebrates
Fish non det. Early Carboniferous Serpukhovian Heath shale Bear Gulch Montana-
- 1
-
-
- bear gulch
- carboniferous
- (and 3 more)
