The brachiopod genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky /

Brachiopod fauna of Saturday Mountain Formation, southern Lemhi Range, Idaho /
by: Ross, Reuben James, 1918-
Published: (1959)

Fossils in Ordovician tuffs, northeastern Maine /
by: Neuman, Robert B., 1920-, et al.
Published: (1964)

Receptaculitids : a phylogenetic debate on a problematic fossil taxon /
by: Nitecki, Matthew H.
Published: (1999)

Echinoderms from Middle and Upper Ordovician rocks of Kentucky /
by: Parsley, Ronald L.
Published: (1981)

Contributions to the Ordovician paleontology of Kentucky and nearby states /
Published: (1979)

The Lower Ordovician gastropod Ceratopea /
by: Yochelson, Ellis L. (Ellis Leon), 1928-2006, et al.
Published: (1957)

Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati arch region /
by: Wahlman, G. P. (Gregory Paul)
Published: (1992)

Teiichispira, a new early Ordovician gastropod genus /
by: Yochelson, Ellis L. (Ellis Leon), 1928-2006, et al.
Published: (1968)

Some Middle Ordovician brachiopods and trilobites from the basin ranges, Western United States /
by: Ross, Reuben James, 1918-, et al.
Published: (1967)

Trepostome and cystoporate bryozoans from the Lexington limestone and the Clays Ferry formation (Middle and Upper Ordovician) of Kentucky /
by: Karklins, Olgerts L., 1924-
Published: (1984)

Ordovician brachiopods, trilobites, and stratigraphy in eastern and central Nevada /
by: Ross, Reuben James, 1918-
Published: (1970)

Shorter contributions to paleontology and stratigraphy /
Published: (1991)

Ordovician and Silurian graptolite succession in the Trail Creek area, central Idaho -- a graptolite zone reference section /
by: Carter, Claire
Published: (1977)

Ordovician and Silurian coral faunas of western United States /
by: Duncan, Helen
Published: (1956)

Systematics, environment, and biogeography of some late Cambrian and early Ordovician trilobites from eastern New York State /
by: Taylor, Michael E., et al.
Published: (1974)

Otter Creek coral bed and its fauna, east-central Kentucky /
by: Simmons, George Clarke, 1923-, et al.
Published: (1967)

Some silicified Strophomenacean brachiopods from the Ordovician of Kentucky, with comments on the genus Pionomena /
by: Pope, John K.
Published: (1982)

Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati arch region of Kentucky, Indiana, and Ohio /
by: Frey, Robert C.
Published: (1995)

The Canadian and Ordovician formations and fossils of South Manchuria,
by: Endo, Riuji
Published: (1932)

Palaeocopid and Podocopid Ostracoda from the Lexington Limestone and Clays Ferry Formation (Middle and Upper Ordovician) of central Kentucky /
by: Warshauer, S. M., et al.
Published: (1982)

Shorter contributions to paleontology and stratigraphy /
Published: (1989)

Trepostomatous bryozoan fauna of the upper part of the Whitewater formation (Cincinnatian) of eastern Indiana and Western Ohio /
by: Utgaard, John
Published: (1964)

The Cambrian-Ordovician boundary : sections, fossil distributions, and correlations /
Published: (1982)

Catalog of fossils from the Middle and Upper Ordovician of Oklahoma.
by: Amsden, Thomas William
Published: (1957)

The Caradoc faunal associations of the area between Bala and Dinas Mawddwy, north Wales /
by: Lockley, M. G.
Published: (1980)

Upper Bromide Formation and Viola Group (Middle and Upper Ordovician) in eastern Oklahoma.
Published: (1983)

The Richmond formation of Michigan /
by: Hussey, Russell C. (Russell Claudius), 1888-
Published: (1926)

Stratigraphy, structure, and graptolites of an Ordovician and Silurian sequence in the Terra Cotta Mountains, Alaska Range, Alaska /
by: Churkin, Michael, 1932-, et al.
Published: (1996)

An account of the ordovician rocks of the Shelve Inlier in west Salop and part of north Powys /
by: Whittard, Walter Frederick, 1902-
Published: (1979)

The Middle and Upper Ordovician conodont faunas of Minnesota /
by: Webers, Gerald F., 1932-
Published: (1966)

Ordovician trilobites of Argentina /
by: Harrington, Horacio Jaime, 1910-
Published: (1957)

Conodont evolution and biostratigraphy of the Upper Cambrian and lowest Ordovician /
by: Miller, James Frederick, 1943-
Published: (1971)

Middle and Late Ordovician solitary rugose corals of the Cincinnati Arch region /
by: Elias, Robert J.
Published: (1983)

Leperditicopid ostracodes from Ordovician rocks of Kentucky and nearby states and characteristic features of the Order Leperditicopida /
by: Berdan, Jean Milton
Published: (1984)

The Ordovician trilobite faunas of the Builth-Llandrindod inlier, central Wales /
by: Hughes, C. P.

Studies of the Actinoceratida : I. The Ordovician development of the Actinoceratida, with notes on actinoceroid morphology and Ordovician stratigraphy. II. Macroloxoceras, a Devonian homeomorph of the Actinoceratida /
by: Flower, Rousseau Hayner, 1913-
Published: (1957)