conodont


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conodont

a tooth-like fossil, amber in colour. Conodonts occur in sediments from the CAMBRIAN to the TRIASSIC and are thought to be associated with the mouth-parts of primitive chordates such as members of the AGNATHA.
References in periodicals archive ?
Recognition of the Boda event in the Pin Formation of Northern India based on new [delta][.sup.13]C and conodont data.
Churchill-Dickson (2007) reviewed vertebrate records from the Silurian--Devonian of Maine, noting Silurian records of 'fish teeth' (probably conodonts) from the Edmunds Formation and acanthodian spines from the Ames Knob Formation, as well as Devonian placoderm remains ('Asterolepis') from the Chapman Sandstone.
The present study has adopted an elaborate field-cum-laboratory study program including bed-by-bed sampling of different faunal groups, taxonomic study of a few selected faunas, Unitary Association methods, diversity analyses, palynology and particulate organic matter analysis as well as diverse paleo environmental proxy data, such as d13C of carbonates and organic matter, and d18O of conodont apatite.
Recovery in conodont bearing-samples ranged from one element from the black shale in Location D and from the gray shale at the top of Location B to 160 elements from the gray shale at the top of Location A.
Biological biozoning studies were thus based on conodont elements in the studied section's complete rock sequence.
BROADER IMPACT: Evolutionary developmental biologists interested in the primitive vertebrate skeleton and isotope geochemists interested in the use of conodont apatite as a proxy for seawater chemistry in deep time, together facilitating a new vista of research integrating evolutionary patterns, feeding ecology and environmental variations revealed in seawater chemistry.
Conodont biostratigraphy and biofacies of Lower and Middle Devonain Limestones, North-central Ohio.
We have undertaken a study of conodonts in the Viivikonna Formation with several objectives: to discover if this specific facies harboured an environmentally distinctive conodont fauna; to determine if the collections from different lithologies were dominated by different taxa; and to refine the biostratigraphy of the formation, especially through determination of the position of the base of the Amorphognathus tvaerensis Zone.
This new species of conodont is characterized by the presence of a reduced platform.
Paleontologists debated whether this conodont animal was a true vertebrate or an invertebrate chordate similar to amphioxus.
Huang, "Ordovician conodont zones and sedimentary sequences of the Tarim Basin, Xinjiang, NW China," Journal of Stratigraphy, vol.
The miospores belong to the Emphanisporites annulatus--Camarozonotriletes sextantii Assemblage Zone (Richardson and McGregor 1986), which corresponds approximately to the Polygnathus dehiscens to Polygnathus serotinus conodont zones of early Emsian to early late Emsian age (Blieck and Cloutier 2000).