PART I 
CHAZYAN AND RELATED BRACHIOPODS—COOPER 
ANNOTATED LIST OF GENERA AND SPECIES—Continued 
Species 
S. elongatus Cooper 
S. halli( Hall and Clarke) 
S. mediocostatus Cooper 
S. obtusus Cooper 
S. oklahomensis Cooper 
S. perfectus Cooper 
S. platys Cooper 
S. rectangulatus Cooper 
S. transversus Cooper 
Sowerbyella aequicostellata 
Cooper 
S. aequistriata (Willard) 
S. angulata Cooper 
S. bellarugosa Ulrich and 
Cooper 
S. cava Cooper 
S. compacta Cooper 
S. curdsvillensis (Foerste) 
S. eximia Cooper 
S. indistincta Cooper 
S. lebanonensis Bassler 
S. medio plicata Cooper 
S. merriami Cooper 
S. monilifera Cooper 
S. nasuta Cooper 
S. negritus (Willard) 
S. parva Cooper 
S. perplexa Cooper 
SPECIES 
Stage Formation 
Trenton Martinsburg 
(Salona) 
Wilderness Lebanon 
Porterfield Chatham Hill, 
Benbolt 
Porterfield- Edinburg 
Wilderness (Nidulites zone) 
Porterfield Bromide 
(Mountain Lake) 
Wilderness Bromide 
(Pooleville) 
Porterfield Little Oak 
Wilderness Oranda 
Porterfield Effna-Rich Valley 
Porterfield Edinburg 
(Nid. and Cyr- 
tonotella zone), 
Shippensburg 
(Pinesburg) 
Wilderness Wardell 
Trenton Hermitage 
Whiterock Upper Pogonip 
(Rhysostrophia 
zone) 
Wilderness Oranda, Martins- 
burg (Salona), 
Salona 
Porterfield Benbolt, Dryden 
Trenton Martinsburg 
(Curdsville) 
Wilderness- Oranda, Martins- 
Trenton burg (Salona) 
Porterfield Bromide 
(Mountain Lake) 
Wilderness Lebanon 
Ashby Lincolnshire 
Wilderness Dark shale under 
Eureka quartzite 
Trenton Decorah (Ion) 
Porterfield Chatham Hill 
Porterfield Effna, Ward Cove, 
Botetourt, 
Chatham Hill, 
Whitesburg 
Porterfield Ward Cove 
Porterfield Chatham Hill 
Geographic 
location 
Was 
Tenn. 
Va. 
PRasoVias 
Va. 
MdsPa., Va. 
Tenn. 
Ala. 
Nev. 
Pay Vas; 
Ala., Tenn., 
Va. 
Ky., Tenn., 
Va. 
Va. 
Okla. 
Tenn. 
Va. 
Ney. 
Towa, Minn., 
Wis. 
Va. 
Va. 
Wide 
Va. 
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