Phylum: Chordata

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

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

Strata: Kiamichi (upper)
Period: Cretaceous (102-103 mya)
Tarrant Co., TX.  April 2, 2011.		 Cretalamna appendiculata

Strata: Fort Worth
Period: Cretaceous (c. 99 mya)
Tarrant Co., TX.  Aug. 18, 2007.		 Cretalamna appendiculata

Strata: Grayson
Period: Cretaceous (c. 95-96 mya)
Tarrant Co., TX.  Dec. 8, 2007.		 Cretalamna appendiculata

Strata: Grayson
Period: Cretaceous (c. 95-96 mya)
Tarrant Co., TX.  April 28, 2013


Leptostyrax macrorhiza

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

Strata: Weno
Period: Cretaceous (c. 98 mya)
Tarrant Co., TX.  Aug. 15, 2009.


Squalicorax falcatus  

Strata: Austin (Atco)
Period: Cretaceous 
Collin Co., TX.  July 3, 2010.		 Squalicorax falcatus  (same)

Strata: Austin (Atco)
Period: Cretaceous 
Collin Co., TX.  July 3, 2010.		 Squalicorax pristodontus

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

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

Strata: Eagle Ford
Period: Cretaceous (c. 94 mya)
Tarrant Co., TX.  May 2010.		 Squalicorax curvatus? (same)

Strata: Eagle Ford
Period: Cretaceous (c. 94 mya)
Tarrant Co., TX.  May 2010.		 Squalicorax shark teeth

Strata: Eagle Ford
Period: Cretaceous (c. 94 mya)
Tarrant Co., TX.  2005-2006.		  


Cretoxyrhina mantelli

Strata: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant Co., TX.  2005-2006.		 Cretoxyrhina mantelli

Strata: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant Co., TX.  2005-2006.


Cretodus crassidens

Strata: Eagle Ford - Austin (Atco)
Period: Cretaceous
Ellis Co., TX.  7 Mar 2009.
[Found by W Knight]		 Cretodus crassidens

Strata: Eagle Ford - Austin (Atco)
Period: Cretaceous
Ellis Co., TX.  7 Mar 2009.
[Found by W Knight]		 Cretodus crassidens
 [+]
Strata: Eagle Ford - Austin
Period: Cretaceous
Ellis Co., TX.  28 Oct 2012.
[Found by Bobby]		 Cretodus crassidens
 [+]
Strata: Eagle Ford - Austin
Period: Cretaceous
Ellis Co., TX. 28 Oct 2012.
[Found by Bobby]
Cretodus sp.
[+]
Strata: Eagle Ford
Period: Cretaceous (c. 92 mya)
Tarrant Co., TX.  May 1, 2010.		      


Protolamna sp.

Strata: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant Co., TX.  Nov. 2013.		 Protolamna sp.

Strata: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant Co., TX.  Nov. 2013.		 Protolamna sp.

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

Strata: Pawpaw
Period: Cretaceous (c. 98 mya)
Tarrant Co., TX.  Sep. 13, 2014.


Paraisurus sp.
[Roz M]
Strata: Kiamichi
Period: Cretaceous (c. 102-103 mya)
Tarrant Co., TX.  June 25, 2011.		 Paraisurus sp.
[Roz M]
Strata: Kiamichi
Period: Cretaceous (c. 102-103 mya)
Tarrant Co., TX.  June 25, 2011.		 Paraisurus sp.
[Roz M]
Strata: Kiamichi
Period: Cretaceous (c. 102-103 mya)
Tarrant Co., TX.  June 25, 2011.


Shark centrums (vertebrae) :

Strata: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Collin Co., TX.  July 3, 2010.		 (same)
Strata: Eagle Ford-Austin (Atco)
Period: Cretaceous (c. 91 mya)
Collin Co., TX.  July 3, 2010.
Strata: Fort Worth
Period: Cretaceous (c. 99 mya)
Tarrant Co., TX.  Aug. 18, 2007.
Strata: Weno
Period: Cretaceous (c. 98 mya)
Tarrant Co., TX.  Aug. 15, 2009.
[+]
Strata: Duck Creek / Fort Worth
Period: Cretaceous (c. 100 mya)
Tarrant Co., TX.  Sept. 17, 2010.		 [+]
Strata: Duck Creek / Fort Worth
Period: Cretaceous (c. 100 mya)
Tarrant Co., TX.  Sept. 17, 2010.		 [+]
Strata: Duck Creek / Fort Worth
Period: Cretaceous (c. 100 mya)
Tarrant Co., TX.  Sept. 17, 2010.
Strata:
Period: Cretaceous
North Texas by Sterling Z.


Order: Hybodontoidae
(Hybodont sharks) teeth

Ptychodus latissimus?

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

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

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

Strata: Eagle Ford 
(Kamp Ranch LS)
Period: Cretaceous (c. 92 mya)
Dallas Co., TX.  April 13, 2008.		 Ptychodus marginalis (side)
 
Strata: Eagle Ford 
(Kamp Ranch LS)
Period: Cretaceous (c. 92 mya)
Dallas Co., TX.  April 13, 2008.		 Ptychodus marginalis
 
Strata: 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
 
Strata: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant co., Tx.		 Ptychodus shark teeth
 
Strata: Eagle Ford
Period: Cretaceous (c. 90-94 mya)
Tarrant co., Tx.		 Ptychodus whipplei teeth

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

Strata: Duck Creek
Period: Cretaceous (c. 102 mya)
Tarrant Co., TX.  May 31, 2009.		    
Ptychodus mortoni

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

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


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