Ditomopyge decurtata

Period:  Pennsylvanian

Location:  north of Cisco, Texas

Collection:  Hardin-Simmons University

Size:  13 mm head width

"tracks"

Period:  Permian

Location:  south of Merkel, Texas

Collection:  Dr. R. H. Tull

Size:  117 mm long block

Identification by:  Jo Cox & Bill May

Description: Two kinds of Trilobite tracks, left is made while foraging, right just walking.

Phacops rana

Period:  Devonian

Location:  Sylvania, Ohio

Collection:  Hardin-Simmons University

Size:  16 mm head width

Phacops rana

Period: Devonian

Location:  ? (Pennsylvania)

Collection: Judie Ostlien

Collected by: Sterling Betts of Chadron Nebraska

3 specimens

#8 Size: 66 mm long

#1 Size: 47 mm wide

#2 Size: 40 mm long

Phacops sp.

Period:  ?

Location:  Otis County, New York

Collection:  Judie Ostlien

Collected by:  Sterling Betts of Chadron Nebraska

#3 Size: 24 mm Dia.

Phacops sp.

Period: Devonian

Location: Clark county, Indiana

Collection: Judie Ostlien

Collected by: Sterling Betts of Chadron Nebraska

#4 Size: 39 mm wide

#5 Size: 34 mm wide

Reedops sp.

Period: Devonian

Location: southeast of Ada, Oklahoma

Collection: Judie Ostlien

Collected by: Sterling Betts of Chadron Nebraska

#7 Size: 19 mm wide

Olenellus sp.

Period: ?

Location: ?

Collection: Judie Ostlien

Collected by: Sterling Betts of Chadron Nebraska

#9 Size: 51 mm wide

Description: Head only.