Phylum: Chordata

Class: Chondrichthyes, Subclass: Elasmobranchii
Order: Lamniformes
(regular sharks)

Cretaceous period: (click for Pennsylvanian-Permian Period)
Cretalamna appendiculata

Formation: Kiamichi (upper)
Period: Cretaceous (102-103 mya)
Tarrant co., Tx.  April 2, 2011.
Cretalamna appendiculata

Formation: Fort Worth
Period: Cretaceous (c. 99 mya)
Tarrant co., Tx.  Aug. 18, 2007.
Cretalamna appendiculata

Formation: Grayson
Period: Cretaceous (c. 95-96 mya)
Tarrant co., Tx.  Dec. 8, 2007.
Cretalamna appendiculata

Formation: Grayson
Period: Cretaceous (c. 95-96 mya)
Tarrant co., Tx.  April 28, 2013


Leptostyrax macrorhiza  

Formation: Kiamichi (upper)
Period: Cretaceous (102-103 mya)
Tarrant co., Tx.  April 2, 2011.
Leptostyrax macrorhiza
 
Formation: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  Dec. 10, 2006.
Leptostyrax macrorhiza
[+]
Formation: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  May 5, 2012.
Leptostyrax macrorhiza

Formation: Weno
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  Aug. 15, 2009.


Squalicorax falcatus  

Formation: Austin (Atco)
Period: Cretaceous 
Collin co., Tx.  July 3, 2010.
Squalicorax falcatus  (same)

Formation: Austin (Atco)
Period: Cretaceous 
Collin co., Tx.  July 3, 2010.
Squalicorax pristodontus

Formation: Ozan?
Age: Cret. (Campanian 83-72 mya)
Location: NE Texas by Tera S. 
Squalicorax pristodontus

Formation
: Ozan?
Age: Cret. (Campanian 83-72 mya)
Location: NE Texas by Tera S.
Squalicorax curvatus?

Formation: Eagle Ford
Period: Cretaceous (c. 94 mya)
Tarrant co., Tx.  May 2010.
Squalicorax curvatus? (same)

Formation: Eagle Ford
Period: Cretaceous (c. 94 mya)
Tarrant co., Tx.  May 2010.
Squalicorax shark teeth

Formation: Eagle Ford
Period: Cretaceous (c. 94 mya)
Tarrant co., Tx.  2005-2006.
 


Cretoxyrhina mantelli

Formation: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant co., Tx.  2005-2006.
Cretoxyrhina mantelli

Formation: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant co., Tx.  2005-2006.


Cretodus crassidens

Formation: Eagle Ford - Austin (Atco)
Period: Cretaceous
Ellis co., Tx.  March 7, 2009.
[Found by W Knight]
Cretodus crassidens

Formation: Eagle Ford - Austin (Atco)
Period: Cretaceous
Ellis co., Tx.  March 7, 2009.
[Found by W Knight]
Cretodus crassidens
[+]
Formation: Eagle Ford - Austin
Period: Cretaceous
Grayson co., Tx.  2012.
[Found by Bobby]
Cretodus crassidens
[+]
Formation: Eagle Ford - Austin
Period: Cretaceous
Grayson co., Tx.  2012.
[Found by Bobby]
Cretodus?
[+]
Formation: Eagle Ford
Period: Cretaceous (c. 92 mya)
Tarrant co., Tx.  May 1, 2010.
     


Protolamna sp.

Formation: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  Nov. 2013.
Protolamna sp.

Formation: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  Nov. 2013.
Protolamna sp.

Formation: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx . Sep. 13, 2014.
Protolamna sp.

Formation: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  Sep. 13, 2014.


Paraisurus sp.
[Roz M]
Formation: Kiamichi
Period: Cretaceous (c. 102-103 mya)
Tarrant co., Tx.  June 25, 2011.
Paraisurus sp.
[Roz M]
Formation: Kiamichi
Period: Cretaceous (c. 102-103 mya)
Tarrant co., Tx.  June 25, 2011.
Paraisurus sp.
[Roz M]
Formation: Kiamichi
Period: Cretaceous (c. 102-103 mya)
Tarrant co., Tx.  June 25, 2011.


Shark centrums (vertebrae) :

Formation: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Collin co., Tx.  July 3, 2010.
(same)
Formation: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Collin co., Tx.  July 3, 2010.

Formation: Fort Worth
Period: Cretaceous (c. 99 mya)
Tarrant co., Tx.  Aug. 18, 2007.

Formation: Weno
Period: Cretaceous (c. 98 mya)
Tarrant co., Tx.  Aug. 15, 2009.
[+]
Formation: Duck Creek / Fort Worth
Period: Cretaceous (c. 100 mya)
Tarrant co., Tx.  Sept. 17, 2010.
[+]
Formation: Duck Creek / Fort Worth
Period: Cretaceous (c. 100 mya)
Tarrant co., Tx.  Sept. 17, 2010.
[+]
Formation: Duck Creek / Fort Worth
Period: Cretaceous (c. 100 mya)
Tarrant co., Tx.  Sept. 17, 2010.

Formation:
Period: Cretaceous
North Texas by Sterling Z.


Order: Hybodontoidae
(Hybodont sharks) teeth

Ptychodus latissimus?

Formation: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Midlothian, Tx.  Oct. 30, 2010.
Ptychodus latissimus? (same)

Formation: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Midlothian, Tx.  Oct. 30, 2010.
Ptychodus latissimus?

Formation: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Midlothian, Tx.  Oct. 6, 2007.
Ptychodus marginalis (top)

Formation: Eagle Ford 
(Kamp Ranch LS)
Period: Cretaceous (c. 92 mya)
Dallas co., Tx.  April 13, 2008.
Ptychodus marginalis (side)
 
Formation: Eagle Ford 
(Kamp Ranch LS)
Period: Cretaceous (c. 92 mya)
Dallas co., Tx.  April 13, 2008.
Ptychodus marginalis
 
Formation: Eagle Ford 
(Kamp Ranch LS)
Period: Cretaceous (c. 92 mya)
Dallas co., Tx.  Sep. 25, 2011.
Ptychodus tooth set (reproduction)

Courtesy Roger F.
Ptychodus tooth set (reconstruction)

Courtesy Shawn H.
Ptychodus tooth set (reconstruction)

Courtesy Shawn H.
Ptychodus shark teeth
 
Formation: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant co., Tx.
Ptychodus shark teeth
 
Formation: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant co., Tx.
Ptychodus whipplei teeth

Formation: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91? mya)
Midlothian, Tx.  Oct. 6, 2007.
Paraptychodus washitaensis

Formation: Duck Creek
Period: Cretaceous (c. 102 mya)
Tarrant co., Tx.  May 31, 2009.
Paraptychodus washitaensis (same)

Formation: Duck Creek
Period: Cretaceous (c. 102 mya)
Tarrant co., Tx.  May 31, 2009.
 
Ptychodus mortoni

Formation: Austin Group
Age: Cretaceous
Location: North Texas by Tera S.
Ptychodus mortoni

Formation: Austin Group
Age: Cretaceous
Location: North Texas by Tera S.
Ptychodus mortoni

Formation: Austin Group
Age: Cretaceous
Location: North Texas by Tera S.


Hybodus sp. (Polyacrodus)

Formation: Kiamichi Formation
Period: Cretaceous (c. 102-103 mya)
Loc: Tarrant co., Tx.  June 26, 2014.
Hybodus sp. (Polyacrodus)

Formation: Kiamichi Formation
Period: Cretaceous (c. 102-103 mya)
Loc: Tarrant co., Tx.  June 26, 2014.