Results 91 to 100 of about 814 (192)

Les Phyllocerataceae malgaches au Crétacé (Phylloceratina, Ammonoidea)

open access: yes, 1993
The present study is a revision of the cretaceous Phyllocerataceae of Madagascar. The studied material essentially comes from the Collignon's collection. The studied specimens will be kept at the "Université de Dijon" as Maurice Collignon expected.
Joly, Bernard
core  

Jaws, radula, and crop of Arnioceras (Ammonoidea)

open access: yes, 1971
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

La posición sistemática del orden Ammonoidea

open access: yesRevista 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

open access: yes, 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   +3 more
core   +1 more source

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

open access: yes, 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  

FIG. 14 in A new species of Hoploscaphites (Ammonoidea: Ancyloceratina) from cold methane seeps in the Upper Cretaceous of the U.S. Western Interior

open access: yes, 2013
FIG. 14. Hoploscaphites gilli Cobban and Jeletzky, 1965. A–C. USNM 132622, macroconch, cast, Pierre Shale, USGS Mesozoic loc. D1871, Niobrara County, Wyoming. A, Apertural; B, ventral; C, left lateral. D–F. USNM 547334, macroconch, Baculites gregoryensis
Jorgensen, Steven D.   +4 more
core   +1 more source

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