A New Genus of Pennsylvanian Fish (Crossopterygii, Coelacanthiformes) from Kansas
By Joan Echols
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A New Genus of Pennsylvanian Fish (Crossopterygii, Coelacanthiformes) from Kansas - Joan Echols
Joan Echols
A New Genus of Pennsylvanian Fish (Crossopterygii, Coelacanthiformes) from Kansas
Published by Good Press, 2021
goodpress@okpublishing.info
EAN 4064066189976
Table of Contents
INTRODUCTION
SYSTEMATIC DESCRIPTIONS
Subclass CROSSOPTERYGII
Endocranium and parasphenoid
Dermal bones of the skull
Visceral skeleton
Axial skeleton
Girdles and paired fins
Unpaired fins
Squamation
COMMENTS ON CLASSIFICATIONS
ENVIRONMENT
SUMMARY
LITERATURE CITED
INTRODUCTION
Table of Contents
In 1931 and 1932, H. H. Lane, C. W. Hibbard and W. K. McNown collected the specimens that Hibbard (1933) described and made the basis of two new species. These were from the Rock Lake shale member of the Stanton formation, six miles northwest of Garnett, Anderson County, Kansas. In 1954, from a locality (KAn-1/D, see page 480) approximately one fourth mile southwest of the first locality, specimens were quarried by F. E. Peabody, R. W. Wilson and R. Weeks. In 1955 R. R. Camp collected additional blocks of Rock Lake shale from this second locality. Study of all of the materials from the above mentioned localities reveals the existence of an hitherto unrecognized genus of coelacanth. It is named and described below.
I wish to thank Prof. Theodore H. Eaton, Jr., for suggesting the project and for much helpful advice. I am indebted to Dr. E. I. White of the British Museum (Natural History) for furnishing a cast of the endocranium of Rhabdoderma elegans (Newberry) for comparison, and to Drs. Donald Baird (Princeton University), Bobb Schaeffer (American Museum of Natural History) and R. H. Denison (Chicago Natural History Museum) for loans and exchanges of specimens for comparison. I am grateful to Dr. Bobb Schaeffer for advice on the manuscript. Mr. Merton C. Bowman assisted with the illustrations. The study here reported on was made while I was a Research Assistant supported by National Science Foundation Grant G-14013.
SYSTEMATIC DESCRIPTIONS
Table of Contents
Subclass CROSSOPTERYGII
Table of Contents
Superorder Coelacanthi
Order Coelacanthiformes
Suborder DIPLOCERCIDOIDEI
Family Diplocercidae
Subfamily Rhabdodermatinae, new subfamily
Type genus.—Rhabdoderma Reis, 1888, Paleontographica, vol. 35, p. 71.
Referred genus.—Synaptotylus new, described below.
Horizon.—Carboniferous.
Diagnosis.—Sphenethmoid region partly ossified, and consisting of basisphenoid, parasphenoid, and ethmoid ossifications; paired basipterygoid process and paired antotic process on basisphenoid; parasphenoid of normal size, and