Results 21 to 30 of about 722 (144)

Molluscan Taxonomy [PDF]

open access: yes, 2017
The molluscs belong to the large and diverse phylum Mollusca, which includes a variety of familiar animals well-known as decorative shells or as seafood.
Mohamed, K S, Venkatesan, V, Vidya, R
core  

Evidence for a stratigraphic basis for the Anthropocene [PDF]

open access: yes, 2014
The Anthropocene was proposed as a term (Crutzen and Stoermer 2000) before consideration was given to the nature of the key signatures, contrasting with standard procedures for defining such units.
Cooper, Anthony H.   +5 more
core   +2 more sources

Proposed Early Cambrian cephalopods are chimaeras, the oldest known cephalopods are 30 m.y. younger [PDF]

open access: yes, 2023
Peer ...
Geyer, Gerd   +3 more
core   +1 more source

Marine flora and fauna of the eastern United States Mollusca: Cephalopoda [PDF]

open access: yes, 1989
The cephalopods found in neritic waters of the northeastern United States include myopsid and oegopsid squids, sepiolid squids, and octopods. A key with diagnostic illustrations is provided to aid in identification of the eleven species common in the ...
Roper, Clyde F. E.   +2 more
core  

A unique Valanginian paleoenvironment at an iron ore deposit near Zengővárkony (Mecsek Mts, South Hungary), and a possible genetic model [PDF]

open access: yes, 2007
The spatially restricted Early Valanginian iron ore (limonite) and manganese deposit at Zengõvárkony (Mecsek Mts, southern Hungary) contains a rich, strongly limonitized, remarkably large-sized (specimens are 30–70% larger than those at their type ...
Abed-Navandi D.   +42 more
core   +1 more source

FIRST EVIDENCE OF COLOR PATTERNS ON CONCHS OF THE LOWER MOSCOVIAN (MIDDLE PENNSYLVANIAN) COILED NAUTILOIDS FROM THE DONETS BASIN, UKRAINE [PDF]

open access: yes, 2023
New finds of well-preserved remains of coiled nautiloids from lower Moscovian sediments (Kamenskaya Formation) of the Donets Basin (eastern Ukraine) allowed to describe the color pattern on the conch surface of species of the genera Parametacoceras ...
Dernov, Vitaly
core   +2 more sources

First possible evidence of parasite infestation in Upper Devonian Discosorida (Nautiloidea) [PDF]

open access: yesSwiss Journal of Palaeontology, 2018
The small, but rather deep pit in the internal mould of the body chamber of Upper Devonian Cyclopoceras (nom. nov.) abundans (Taxyceratidae, Discosorida) from Central Russia is described in this paper. Similar pits are known to exist on internal moulds of Paleozoic cephalopod shells including nautiloids and Devonian ammonoids, and are interpreted as ...
openaire   +1 more source

Late Emsian Rutoceratoidea (Nautiloidea) from the Prague Basin, Czech Republic: morphology, diversity and palaeoecology [PDF]

open access: yesPalaeontology, 2011
Abstract: Nautiloids of the superfamily Rutoceratoidea from the late Emsian (late Early Devonian) of the Prague Basin (Czech Republic) are commented upon. Species recognized include the hercoceratidsHercoceras mirum,H.?transiens,Ptenoceras proximum,P. nudum,P.
ŠTĚPÁN MANDA, VOJTĚCH TUREK
openaire   +1 more source

MIDDLE JURASSIC NAUTILOIDEA FROM WESTERN FRANCE

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2004
The Middle Jurassic shelf margin limestones and marly limestones of Western France yield quite numerous Nautilida. This record is here described for the first time in detail, nine genera and more than forty species, whose range rarely exceeds one or two ammonite biozones, constitute a rather precise tool to date Middle Jurassic beds.
openaire   +2 more sources

Cephalopod classification and taxonomy [PDF]

open access: yes, 2015
Chambered nautilus, cuttlefishes, squids and octopus are the four major groups of cephalopods, which belong to the highly evolved class of phylum Mollusca. Cephalopods are the third largest molluscan class after bivalves and gastropods and consist of
Mohamed, K S, Venkatesan, V
core  

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