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Showing results for tags 'heath shale'.
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Kalops monophrys is known by over 125 specimens from the Bear Gulch Limestone. K. monophrys is distinguished from its smaller sister species, Kalops diophrys, by having more caudal fin rays, a different number of supraorbital bone rows, and the development of its ganoine ridging at a larger size. The cranial osteology of Kalops most closely resembles that of the poorly known Palaeoniscus and "Elonichthys" serratus. The snout structure is closest to that of the Tarrasiiformes. Diagnosis from Poplin & Lund 2002, p. 1014: "Total length ranging from 44 to 116 mm; postrostral meeting the frontal in the midline anteriorly to mid-orbit level; ovoid antorbital; one row of supraorbitals; about five infraorbitals and five suborbitals; anterior extremity of the preopercle as high as the posterior plate of the maxillary; about 15 branchiostegal rays; one pair of extrascapulars; supracleithrum higher than opercle; from eight up to 17 predorsal median scutes, continuous between skull and dorsal fin; dorsal fin spanning 14 scale rows; anal fin with fulcra; scaled lobe of the caudal fin at 25 degrees to the body axis." Line drawing from Poplin & Lund 2002, p. 1017: Identified by oilshale using Poplin & Lung 2002. References: Poplin, C., & R. Lund (2002) "Two Carboniferous fine-eyed paleoniscoids (Pisces, Actinopterygii) from Bear Gulch (USA)." Journal of Paleontology 76: 1014-1028.
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Lit.: MOORE, R., McKENZIE, S. and LIEBERMAN, B. (2007): A CARBONIFEROUS SYNZIPHOSURINE (XIPHOSURA) FROM THE BEAR GULCH LIMESTONE, MONTANA, USA. Palaeontology, Vol. 50, Part 4, 2007, pp. 1013–1019. Schram, F. (1979): Limulines of the Mississippian Bear Gulch limestone of central Montana, USA. Transactions of the San Diego Society of Natural History 19:67-74 (1979)
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References: Lund, R. 1982 - Harpagofututor volsellorhinus new genus and species (Chondrichthyes, Chondrenchelyiformes) from the Namurian Bear Gulch Limestone, Chondrenchelys problematica Traquair (Visean), and their sexual dimorphism. Journal of Paleontology, 56 (4): 938-958. Lund, R. & Grogan, E.D. 1997 - Soft tissue pigments of the Upper Mississippian chondrenchelyid, Harpagofututor volsellorhinus (Chondrichthyes, Holocephali) from the Bear Gulch Limestone, Montana, USA. Journal of Paleontology, 71 (2): 337-342.
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A modern Ratfish, Bischoff Island, British Columbia, Canada (from Wikipedia: Clark Anderson/Aquaimages) Lit.: Grogan, E. Lund, R. 2002: The geological and biological environment of the Bear Gulch Limestone (Mississippian of Montana, USA) and a model for its deposition. Geodiversitas 2002, 24 (2): 296-315 Lund, R. 1977 - Echinochimaera meltoni new genus and species (Chimaeriformes), from the Mississippian of Montana. Annals of Carnegie Museum, 46 (13): 195-221. Hagadorn, J.: Bear Gulch: An exceptional Upper Carboniferous Plattenkalk
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Paraconularia subulata (Hall 1858) together with Aviculopecten sp., a bivalve mollusc. References: Babcock, L. E., and R. M. Feldmann (1986): Devonian and Mississippian conulariids of North America. part B. Paraconularia, Reticulaconularia, New Genus, and organisms rejected from Conulariida. Annals of Carnegie Museum 55: 411-479.
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Taxonomy from Fossilworks.org. Diagnosis from Factor & Feldman 1985 p.344: “Eumalacostracan, shrimp-like in overall appearance, with large, smooth carapace; rostrum long; 8 pairs of long, subequal, achelate thoracopods.” Line drawing from Factor & Feldman 1985, p 345. Bar represents 1 cm. Identified by oilshale. 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.
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This fish belongs to the Tarrasiids, a group of extinct bony fish with elongated body and a diphycercal caudal fin that was continuous with the dorsal and anal fins. The continuous dorsal-caudal-anal fin is well webbed between the fin rays. Fish with this fin disposition today are slow weak swimmers that move either forward or backward, by body undulation, median fin undulation or pectoral paddling. Fish such as these are shelter dwellers in geometrically complex shallow water environments, such as weed or sponge beds. No valid description seems to exist. For Apholidotos ossna Lund, the reference given is "in Frickhinger, 1991". Another name - Apholidotus ossuosus Lund - is used by UMPC (University of Montana Paleontology Center) in their catalog. In his own much later publications (e.g. in 1999), Lund himself in not using any of these combinations, he is only using the nickname "Garden Eel".
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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: Vertebrates
Hardistella montanensis Janvier & Lund, 1983 A Lamprey Lower Carboniferous Heath Shale Formation Bear Gulch Montana USA Lit.: Janvier, P. & Lund, R. 1983 – Hardistiella montaniensis from the Lower Carboniferous of Montana with remarks on the affinity of the lampreys. J. Vert. Paleont. 2, 407-413. Janvier, P. & Lund, R. 1986 – A second lamprey from the Lower Carboniferous of Bear Gulch Montana. Geobios 19, 647-652. Robert S. Sansom, Sarah E. Gabbott, and Mark A. Purnell Decay of vertebrate characters in hagfish and lamprey (Cyclostomata) and the implications for the vertebrate fossil record Proc. R. Soc. B. 2011 278 1709 1150-1157 -
From the album: Vertebrates
Wendyichthys lautreci Lund & Poplin 1997 Lower Carboniferous Serpukhovian Heath Shale Formation Bear Gulch Montana USA
