Ischyrhiza mira Leidy, 1856

Remarks

• Collector :   Michael Yuro www.njfossilman.com *website down on last check 07/29/08
• Formation:   Monmouth Group, Navesink Formation
• Location:     Monmouth County, NJ

Remarks

• Collector:    Tony Fabian
• Formation:  Monmouth Group, Navesink Formation
• Location:    Monmouth County, NJ

Rostral tooth in Dan Woehr's collection from the

Taylor Group, Ozan Formation, Fannin County, TX

General Info

Synonyms (older names and misidentifications in the literature)

• Sawfish

• 1856 Ischyrhiza mira Leidy

• 1860 Ischyrhiza mira Leidy

• 1872 Ischyrhiza mira Leidy; Cope

• 1875 Ischyrhiza mira Leidy; Cope

• 1911 Ischyrhiza mira Leidy; Fowler

• 1964 Ischyrhiza mira Leidy; McNulty and Slaughter

• 1967 Ischyrhiza mira Leidy; Case

• 1968 Ischyrhiza mira mira Leidy; Slaughter and Steiner

• 1973 Ischyrhiza mira mira Leidy; Case

• 1975 Ischyrhiza mira Leidy; Cappetta and Case

• 1983 Ischyrhiza mira Leidy; Lauginiger and Hartstein

• 1989 Ischyrhiza mira Leidy; Finsley

• 1992 Ischyrhiza mira Leidy; Case

• 1993 Ischyrhiza mira Leidy; Welton and Farish

Stratigraphic Occurrence

• Rancocas Group, Hornerstown Fm (Paleocene) of NJ

• Monmouth Group, Navesink Fm of NJ

• Monmouth Group, Mount Laurel Fm of NJ and DE

• Matawan Group, Marshalltown Fm of NJ and DE

• Matawan Group, Merchantville Fm of NJ and DE

• Lower Taylor Group, Ozan Fm of north TX

• Belly River Grp, Dinosaur Park Fm, Lethbridge Coal Zone Mbr of Alberta

• Peedee Fm of NC

Age

• Ischyrhiza mira Leidy ranges from the Menabites (Delawarella) delawarensis (Morton) zone into the early Tertiary Period (Paleocene, Danian Stage), ~82–62 mya.

Geographic Occurrence (not an all-inclusive list)

• Alberta, Canada

• Burlington County, NJ

• Camden County, NJ

• Dallas County, TX

• Fannin County, TX

• Hunt County, TX

• Monmouth County, NJ

• New Castle County, DE

Remarks

        For identification and descriptions, see:

• Case, G. R.  1992.  A Pictorial Guide to Fossils.  Malabar, FL:  Kreiger.

• Lauginiger, E. M.; Hartstein, E. F.  1983.  A Guide to Fossil Sharks, Skates, and Rays from the Chesapeake and Delaware Canal Area, Delaware.  Delaware Geological Survey Open File Report 21.