Three hundred and forty-six articulated fossil specimens of two species from the Middle or Upper Jurassic Karabastau Formation of the Karatau Range (Kazakhstan, Asia) were studied to revise two little-known palaeonisciform fish: Pteroniscus turkestanensis and Morrolepis aniscowitchi. Detailed morphological analysis shows that P. turkestanensis, Daqingshaniscus longiventralis and Uighuroniscidae form a closely related group. They are far more distantly related to the Palaeoniscidae than previously inferred. The first detailed scanning electron microscopy of the unique scale cover of M. aniscowitchi is presented. Morrolepis is found to be devoid of denticles on the surface of the bones, scales and lepidotrichia-so far considered to be a key coccolepidid characteristic. However, it bears exceptionally robust lateral line scales. Comparison of the axial skeletons of M. aniscowitchi and Morrolepis andrewsi reveals their close affinities within Coccolepididae. The axial skeleton, despite its rare preservation in palaeonisciforms, may be taxonomically informative, at least at the family level. The Karatau palaeonisciforms, being among the youngest examples of basal actinopterygians (persisting in Asia through the late Mesozoic), possess a set of conservative morphological characters that suggest they were relictual taxa by Jurassic times, thus highlighting some freshwater systems as refuges for plesiomorphic taxa.
机构:
Univ St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Lamb, Melissa A.
Hickson, Thomas A.
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Hickson, Thomas A.
Umhoefer, Paul J.
论文数: 0引用数: 0
h-index: 0
机构:
No Arizona Univ, Dept Geol, Room 210 Geol Annex, Flagstaff, AZ 86011 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Umhoefer, Paul J.
Anderson, Zachary W.
论文数: 0引用数: 0
h-index: 0
机构:
Utah Geol Survey, Mapping Program, 1594 W North Temple,Suite 3110, Salt Lake City, UT 84116 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Anderson, Zachary W.
Pomerleau, Crystal
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Pomerleau, Crystal
Souders, Katrina
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Souders, Katrina
Lee, Lindsey
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Lee, Lindsey
Dunbar, Nelia
论文数: 0引用数: 0
h-index: 0
机构:
New Mex Inst Min & Technol New Mex Tech, New Mex Bur Geol & Mineral Resources, 801 Leroy Pl, Socorro, NM 87801 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Dunbar, Nelia
McIntosh, William
论文数: 0引用数: 0
h-index: 0
机构:
New Mex Inst Min & Technol New Mex Tech, New Mex Bur Geol & Mineral Resources, 801 Leroy Pl, Socorro, NM 87801 USAUniv St Thomas, Dept Earth Environm & Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
机构:
Univ St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Lamb, Melissa A.
Hickson, Thomas A.
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Hickson, Thomas A.
Umhoefer, Paul J.
论文数: 0引用数: 0
h-index: 0
机构:
No Arizona Univ, Dept Geol, Room 210 Geol Annex, Flagstaff, AZ 86011 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Umhoefer, Paul J.
Anderson, Zachary W.
论文数: 0引用数: 0
h-index: 0
机构:
Mapping Program, Utah Geol Survey, 1594 W North Temple,Suite 3110, Salt Lake City, UT 84116 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Anderson, Zachary W.
Pomerleau, Crystal
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Pomerleau, Crystal
Souders, Katrina
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Souders, Katrina
Lee, Lindsey
论文数: 0引用数: 0
h-index: 0
机构:
Univ St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Lee, Lindsey
Dunbar, Nelia
论文数: 0引用数: 0
h-index: 0
机构:
Mapping Program, Utah Geol Survey, 1594 W North Temple,Suite 3110, Salt Lake City, UT 84116 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA
Dunbar, Nelia
McIntosh, William
论文数: 0引用数: 0
h-index: 0
机构:
Mapping Program, Utah Geol Survey, 1594 W North Temple,Suite 3110, Salt Lake City, UT 84116 USA
New Mex Inst Min & Technol New Mex Tech, New Mex Bur Geol & Mineral Resources, 801 Leroy Pl, Socorro, NM 87801 USAUniv St Thomas, Dept Earth Environm & Soc, Soc, OWS 153,2115 Summit Ave, St Paul, MN 55105 USA