Chiloscyllium missouriensis

CASE, 1979


Classification: Elasmobranchii Orectolobiformes Hemiscylliidae

Reference of the original description
CASE, G.R. (1979)
Additional fish records from the Judith River Formation (Campanian) of Montana. Géobios, 12 (2): 223–233, 1 fig., 2pl.

Synonyms / new combinations and misspellings
Chiloscyllium missouriense

Types
Chiloscyllium missouriensis
Holotype: USTL: MTA-39;


Description:


Citation: Chiloscyllium missouriensis CASE, 1979: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Chiloscyllium missouriensis CASE, 1979, lower jaw, lateral tooth, MTA 39, holotype, 1b. Labial view; 1c. Profile view; 1d. Lingual view; and 1e. Basal view © G. Case

Distribution Geographic
Suction Creek, Blaine County, Montana [389]; Broom Draw Quad, Worland SE Quad, Wyoming, USA [393]; Southeastern Alberta, USA [26316]; Parowan Canyon, southern Utah [21412]; southern Utah [20268]

Distribution Strategraphy
Upper Judith River Formation (Campanian) [389]; Late Campanian, Mesaverde Formation [393]; Judith River Group (the Foremost and Oldman formations) [26316]; Iron Springs Formation (Upper Cretaceous) [21412]; Straight Cliffs Formation, Upper Cretaceous[20268]

Material
type only [389]; 7 specimen [393]; 15 specimen [26316]; UMNH VP 14466 and UMNH VP 14489 [21412]; [20268]

Description
Original diagnose after Case, 1979 [389]:Tooth minute in size, less than 1/2 of a mm in its greatest width, and approximately 0,25 mm in height, tooth is short, squat, and slightly worn with usage, with no sharp point to the apex of its crown.

Remarks
valid after Case (1979) p. 224 [389];

Taxonomic remark: KIRKLAND et al. 2013 [20268] synonymized ths species with Cantioscyllium bighornensis, but it is douptful, EATON et al. 2014 [21412] didn't follow KIRKLAND et al. 2013 [20268]

References
KIRKLAND, J.I. (2014)
When sharks, rays, & sawfish ruled Utah's rivers. Survey Notes, May 2014: 6–7
EATON, J.G. & GARDNER, J.D. & KIRKLAND, J.I. & BRINKMAN, D.B. & NYDAM, R.L. (2014)
Vertebrates of the Iron Springs formation, upper Cretaceous, southwestern Utah. In: MacLean, J.S., Biek, R.F., and Huntoon, J.E., editors, Geology of Utah’s Far South: Utah Geological Association Publication 43: 523–556
KIRKLAND, J.I. & EATON, J.G. & BRINKMAN, D.B. (2013)
Elasmobranchs from upper Cretaceous freshwater facies in southern Utah. In: At the top of the Grand Staircase – The Late Cretaceous of southern Utah. LOEWEN, Alan L. TITUS & Mark A. (eds.), Indian Univ. Press.: 153–194, fig. 9.1–9.22
PENG, J. & RUSSELL, A.P. & BRINKMAN, D.B. (2001)
Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman formations of the Judith River group (Campanian) of Southeastern Alberta : an illustrated guide. Provincial Museum of Alberta Natural History, Occassional Paper No. 25
PENG, J. (1997)
Palaeoecology Of Vertebrate Assemblages From The Upper Cretaceous Judith River Group (Campanian) Of Southeastern Alberta, Canada. unpublished thesis, University of Calgary
CASE, G.R. (1987)
A new selachian fauna from the Late Campanian of Wyoming (Teapot Sandstone Member, Mesaverde Formation, Big Horn Basin). Palaeontographica, Abt. A, 197 (1–3): 1–37, 12 fig., 15 pl., 3 tabl.
CASE, G.R. (1979)
Additional fish records from the Judith River Formation (Campanian) of Montana. Géobios, 12 (2): 223–233, 1 fig., 2pl.
DOI: 10.1016/S0016-6995(79)80080-7