Phylum: Arthropoda 
Subphylum: Schizoramia

Super Class Arachnomorpha (trilobites, etc.)

Pennsylvanian Period:
unknown trilobite (folded in half) Strata: Mineral Wells (Salesville sh.?) Period: Pennsylvanian (c. 300 mya) Loc: Palo Pinto Co., TX.  Dec 22, 2005.	unknown trilobite (folded in half) Strata: ? Period: Pennsylvanian (c. 300 mya) Loc: Palo Pinto Co., TX.  April 19, 2008.
Ditomopyge sp. trilobite Strata:   Period: Pennsylvanian (c. 300 mya) Loc: Palo Pinto Co., TX.  April 19, 2008.	Ditomopyge sp. Strata: Mineral Wells (Salesville sh.?) Period: Pennsylvanian (c. 300 mya) Loc: Palo Pinto Co., TX. May 8, 2010.
unknown trilobite Strata: Mineral Wells (Salesville shale) Period: Pennsylvanian (c. 300 mya) Loc: Palo Pinto Co., TX.  Oct. 13, 2007.	unknown trilobite (folded in half) Strata: ? Period: Pennsylvanian (c. 300 mya) Loc: Wise Co., TX.  27 April 2014.

Ordovician Period:

Cryptolithus sp. trilobite (molt)   [block]  Strata: Viola Group Period: Ordovician (448-443 mya)  Loc: near Ardmore, Ok.  Dec. 2, 2007.