Welcome to Catnapin's

Pennsylvanian Fossil Gallery - Brachiopod

Brachiopoda, Articulata, Strophomenida

(Phylum, Class, Order)

Previous Arrow    Fossil Index     Next Arrow

Red text = needs information 

Fossil identification by Jo Cox unless otherwise noted

*****************************************************************

Chonetidae

(Family)

Chonetinella verneuiliana

Period: Pennsylvanian

Location: near Gunsight Texas

Collection: Jo Cox

Size: 16 mm hinge (left)

Chonetinella verneuilliana 1a c.jpg (117469 bytes)   Chonetinella verneuilliana 1b c.jpg (91325 bytes)   Chonetinella verneuilliana 1c c.jpg (102059 bytes)

Description: convexi-concave --- deep sulcus on the pedicle valve, fold on brachial valve, even or widest at hinge, hinge has 4 spines

 

Mesolobus decipiens

Period: Pennsylvanian

Location: ? (near Moran, Texas)

Collection: Hardin-Simmons University

Size: 14 mm hinge

Mesolobus decipiens 1a.jpg (54015 bytes)   Mesolobus decipiens 1b.jpg (50799 bytes)

Description: convexi-concave  --- double sulcus on the pedicle valve

 

Neochonetes sp. (? puebloensis)

Period: Pennsylvanian

Location: between Cisco & Moran, Texas

Collection: Jo Cox

Size: 27 mm hinge

Neochonetes puebloensis.jpg (1501790 bytes)

2 specimens

Description: convexi-concave, fine radial ribs, fine growth rings --- widest at hinge, shape wider than long -- spine bumps on pedicle valve hinge line

*****************************************************************

Linoproductidae

(Family)

Linoproductus prattenianus

Period: Pennsylvanian

Location: ? (north of Cisco, Texas)

Collection: Hardin-Simmons University

Size: 35 mm hinge

Linoproductus prattenianus.jpg (950105 bytes)

Description: convexi-concave, fine radial ribs --- pedicle valve covered with evenly spaced spines --- ears have prominent spine attachments

*****************************************************************

Marginiferidae

(Family)

Kozlowskia splendens

Period: Pennsylvanian

Location: near Moran, Texas

Collection: Hardin-Simmons University

Size: 21 mm hinge

Chonetinella primitiva 1a.jpg (63275 bytes)   Chonetinella primitiva 1b.jpg (83667 bytes)

Description: convexi-concave, smooth surface  --- deep narrow sulcus on the tall pedicle valve with one spine attachment on each lobe, this specimen no longer has wings so hinge is narrower than width  --- brachial valve fold is at the lamellose anterior margin only

*****************************************************************

Orthotetidae

(Family)

Derbyia crassa

Period: Pennsylvanian - Permian

Location: ?

Collection: Hardin-Simmons University

Size: 36 mm wide

Derbya crassa 2a.jpg (951986 bytes)   Derbya crassa 2b.jpg (106648 bytes)

Description: both valves almost flat convex, fine even radial ribs --- growth rings --- hinge nearly as wide as valve

 

Derbyia jacksboroensis

Period: Pennsylvanian - Permian

Location: ?

Collection: Hardin-Simmons University

Size: 74 mm wide, 83 mm wide

Derbyia jacksboroensis 2a.jpg (2445584 bytes)   Derbyia jacksboroensis 2b.jpg (1291237 bytes)

Description: both valves almost flat convex, fine even radial ribs --- growth rings --- hinge nearly as wide as valve

*****************************************************************

Previous Arrow    Fossil Index     Next Arrow

Email:
fossilcritter"at"catnapin.com

to reduce spam, change "at" to @
please be specific

Home Page    IconWriting   Art Index   Martial Arts Index   Wildflower Index   Critter Index   About Us   Links

Copyright Notice:  All photos are copyrighted and protected by the laws of the United States.
Unauthorized duplication for sale or distribution is prohibited.