The Sloans Valley Member (Paragon Formation) of Kentucky: Vertebrata

by Don R. Chesnut (chesnut<at>
ęDRC 2014
The following fossils were collected from the Slade Formation and Sloans Valley Member collectively.

Phylum Chordata Haeckel, 1874

Subphylum Vertebrata Cuvier, 1812

microicthyoliths from Chondrichthyes and Osteichthyes
Click to see microicthyolithB.jpg

Class Chondrichthyes Huxley, 1880
[most of the following are form genera and species.]

Subclass Elasmobranchii Bonaparte, 1838

Infraclass Cladoselachimorpha author?, date?

Order Cladoselachiformes author?, date?

Cladodus form-genus form-ssp.
Click to see cladodont1.jpg Click to see cladodont2.jpg Click to see cladodont3.jpg Click to see cladodont4.jpg
Click to see IMG_6012.JPGClick to see IMG_6013.JPG
Click to see IMG_6027.JPG  Click to see IMG_6028.JPG Click to see IMG_6029.JPG Click to see IMG_6030.JPG

Infraclass Euselachii (Hay, 1902)

Order Ctenacanthiformes author?, date?

Ctenacanthus form-genus form-sp.
Click to see cladodont6.jpg Click to see IMG_6017.JPG

Acondylacanthus form-genus sp.
Click to see cladodont5.jpg Click to see IMG_6019.JPG Click to see IMG_6020.JPG

incertae sedis

Lophodus/Agassizodus form genus
Click to see durophagus17.jpg

Orodus/Hybodus form genus
Click to see durophagus18.jpg 

Subclass Holocephali (Bonaparte, 1832-41)

calcified cartilage from cranium or mandible
Click to see IMG_6024.JPG  Click to see jaw7.jpg Click to see jaw8.jpg

Order Petalodontiformes Zangerl, 1981

Family Petalodontida (Zangerl, 1981)

Chomatodus chesterensis St. John andWorthen, 1875
Click to see durophagus5.jpg

Chomatodus sp.
Click to see durophagus15.jpg

Petalodus acuminatus (Agassiz, 1838)
Click to see durophagus4.jpg Click to see IMG_6023.JPG

Polyrhizodus sp.
Click to see durophagus3.jpg Click to see IMG_6021.JPG

Order Bradyodonta (Woodward, 1821)
[These are largely form genera and species.]

Copodus pusillus St. John and Worthen, 1883
Click to see durophagus2.jpg

Psammodus form-genus sp.
  Click to see durophagus1.jpg Click to see IMG_6014.JPG

Deltodus/Psephodus/Sandalodus form genera
 Click to see durophagus10.jpg Click to see durophagus11.jpg Click to see durophagus12.jpg  Click to see durophagus13.jpg

Click to see durophagus14.jpg Click to see durophagus7.jpg Click to see durophagus8.jpg Click to see durophagus9.jpg
  Click to see IMG_6015.JPG  Click to see IMG_6016.JPG   Click to see IMG_6022.JPG Click to see durophagus6.jpg 

incertae sedis

Petrodus sp. (skin denticle probably found on many genera in several classes)
Click to see durophagus16.jpg