Middle Jurassic (Bajocian) Eastern Oregon
Middle Jurassic (Bajocian) Eastern Oregon
Middle Jurassic (Bajocian) Eastern Oregon
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PLATE 11<br />
[All figures are 11atural size. All specimens are from the Weberg Member of the Snowshoe Formation]<br />
FJGURES 1- 4. Sonninia (Euhoploceras) dominans Buckman (p. 63).<br />
1, 4. Hypotype, CAS 13378 from Lupher's Joe . 228. Whorl section drawn<br />
at diameter of 180 mm. Resembles Sonninia costigera Buckman (1894,<br />
pl. 102) and S. obtus1jormis Buckman (1892, pl. 72, figs. 3-.'i).<br />
2. Small, immature septate hypotype, CAS 13380 from Lupher'R Joe. 306.<br />
3. S11ture line drawn at whorl height of 42 mm on hypotype, CAS 13377<br />
from Lupher's Joe. 226. Specimen bears ribbing comparable with that<br />
present near the adoral end of the specimen shown on pl. 12, fig. 5.
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