Ammonites from the Weno limestone (Albian) in northeast Texas. American Museum novitates ; no. 3236

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New York, NY : American Museum of Natural History
The Weno Limestone of northeast Texas is an upper Albian unit that has previously been imprecisely dated in terms of the European standard zonal sequence. Ammonite faunas, chiefly from the lower Weno, show it to be equivalent to a part of the lowest Mortoniceras (Subschloenbachia) rostratum Subzone of the highest Albian Stoliczkaia dispar Zone of Europe on the basis of the presence of M. (S.) rostratum (J. Sowerby, 1817), together with Engonoceras serpentinum (Cragin, 1900), Engonoceras aff. subjectum (Hyatt, 1903), Cantabrigites aff. subsimplex (Spath, 1933), Mortoniceras (Angolaites) drakei (Young, 1957), Mortoniceras (Angolaites) wintoni (Adkins, 1920), Stoliczkaia (Stoliczkaia) argonautiformis (Stoliczka, 1864), Neophlycticeras (Neophlycticeras) sp., Anisoceras armatum (J. Sowerby, 1817), Anisoceras perarmatum Pictet and Campiche, 1861, and Mariella (Wintonia) sp. Mortoniceras (Subschloenbachia) Spath, 1921, is regarded as the senior synonym of Durnovarites Spath, 1932, and Mortoniceras (Angolaites) Spath, 1932, as the senior synonym of Drakeoceras Young, 1957. Most previous studies have interpreted the ammonites of the Weno Limestone as predominantly endemic to Texas. However, Mortoniceras (Angolaites) was originally described from Angola, S. (S.) argonautiformis from southern India, and M. (S.) rostratum and the species of Cantabrigites, Neophlycticeras, and Anisoceras from western Europe.
46 p. : ill. ; 26 cm.
Includes bibliographical references (p. 43-46).