Results 81 to 90 of about 927 (147)

La posición sistemática del orden Ammonoidea

Revista del Museo de La Plata
Si quisiéramos comprobar la influencia de la especialización profesionalsobre la orientación mental de dos clases distintas de estudiosos, podríamospreguntar a un geólogo y a un zoólogo: ? ¿Qué se entiende por Ammonites?
Enrique Fossa Mancini
doaj  

Ontogenetic and evolutionary patterns of septal neck transformation in the Ammonoidea

, 1992
Four types of septal necks are present in the Ammonoidea: (1) retrochoanitic (entirely projected adapically), (2) modified retrochoanitic (projected adorally or both adorally and adapically on the dorsal side and adapically on the ventral side), (3 ...
Kazushige Tanabe, Wolfgang Weitschat, Royal H. Mapes, Neil H. Landman   +3 more
core   +1 more source

Spatial distribution of oncocerid cephalopods on a Middle Devonian bedding plane suggests semelparous life cycle. [PDF]

Sci Rep, 2020
Pohle A, Fuchs D, Korn D, Klug C.
europepmc   +1 more source

Origination, diversity, and extinction metrics essential for analysis of mass biotic crisis events: An example from cretaceous ammonoidea [PDF]

, 1988
Traditional mass extinction research has predominently concentrated on statistically demonstrating that mass extinction intervals are significantly above background levels of familial and generic extinction in terms of extinction percentage, extinction ...
Collom, Christopher J.
core  

057_03: 28-29 Large Ammonite from Baha, California

, 2021
This black and white photograph features a fossil of an ammonite. Also known as Ammonoidea, it is a tightly wound shell on a display platform.
Sternberg, George Fryer, 1883-1969
core  

Origin of the Tethyan Hemihoplitidae tested with cladistics (Ancyloceratina, Ammonoidea, Early Cretaceous): an immigration event?

, 2014
International audienceLes Hemihoplitidae du Barrémien supérieur (Ancyloceratina, Ammonoidea) sont connus sur la plus grande partie de la marge Nord Téthysienne et dans le Bassin de Essaouira-Agadir (Maroc).
Bersac, Stéphane, Bert, Didier
core   +1 more source

The Giganteuston Member of Öschingen (Humphriesianum Zone, Lower Bajocian, Swabian Alb), with comments on the genera Dorsetensia Buckman, 1892 and Nannina Buckman, 1927 [PDF]

, 2011
Dietze, Volker, Schweigert, Günter, Wannenmacher, Norbert, Fidder, Uwe   +3 more
core   +1 more source

A new species of Hoploscaphites (Ammonoidea, Ancyloceratina) from cold methane seeps in the Upper Cretaceous of the U.S. Western Interior. (American Museum novitates, no. 3781)

, 2013
39 pages : illustrations (some color), map ; 26 cm.We describe Hoploscaphites gilberti, n. sp. (Ammonoidea: Ancyloceratina), from the Upper Cretaceous (middle-upper Campanian) Pierre Shale spanning the zones of Baculites scotti and Didymoceras ...
Cobban, William A., 1916-2015., Kennedy, W. J. (William James), Jorgensen, Steven D., Kennedy, W. J. (William James), Larson, Neal L., Cobban, William Aubrey, 1916-, Landman, Neil H.   +6 more
core   +1 more source

Vertical escape tactics and movement potential of orthoconic cephalopods. [PDF]

PeerJ, 2021
Peterman DJ, Ritterbush KA.
europepmc   +1 more source

Rare Middle Jurassic ammonites of the families Erycitidae, Otoitidae and Stephanoceratidae from southern Germany [PDF]

, 2010
Dietze, Volker, Furze, Roger, Schreiber, Dietmar, Schneider, Erich, Schweigert, Günter, Dangelmaier, Wolfgang, Auer, Wolfgang, Neisser, Elmar, Gräbenstein, Stefan, Dietl, Gerd, Kutz, Michael   +10 more
core   +1 more source