conodont


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co·no·dont

 (kō′nə-dŏnt′, kŏn′ə-)
n.
1. Any of various small marine chordates of the group Conodonta of the Paleozoic Era and the Triassic Period, preserved primarily in the form of their conelike teeth.
2. A fossil tooth of this chordate. Conodonts are the most widespread Paleozoic microfossils and are important for biostratigraphic indexing.

[Greek kōnos, cone; see kō- in Indo-European roots + -odont.]

conodont

(ˈkəʊnədɒnt; ˈkɒn-)
n
(Palaeontology) any of various small Palaeozoic toothlike fossils derived from an extinct eel-like marine animal
[C19: from Greek kōnos cone + odont]

co•no•dont

(ˈkoʊ nəˌdɒnt, ˈkɒn ə-)

n.
a toothlike Paleozoic and early Mesozoic microfossil, representing the remains of small eellike marine animals of the order Conodonta.
[1855–60; < German Conodonten (pl.) < Greek kôn(os) cone + -odont -odont]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.conodont - the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
tooth - hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
2.conodont - small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
agnathan, jawless fish, jawless vertebrate - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
Conodonta, Conodontophorida, order Conodonta, order Conodontophorida - extinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications considered a separate phylum
References in periodicals archive ?
Records of the conodont Icriodus woschmidti allowed these beds to be dated more precisely as the Lochkovian (Early Devonian) (Zhivkovich & Chekhovich 1985).
The conodont fauna suggest that the PT boundary coincides with the disconformity at the Chhidru-Mianwali formations but the palynological assemblages from the upper-most Chhidru Formation have affinities with Permian as well as Griesbachian (basal Early Triassic).
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).
There were several metres of thin to medium-bedded Claraia vermicular limestone inter-bedded with coloured shale above the key bed; this belonged to the Early Triassic, based on a study of conodont fragments.
Preliminary report on conodont and Sm-Nd isotope data from Upper Ordovician Red River strata (Herald and Yeoman formations) in the Williston Basin, Berkley et al Midale 12-2-7-11W2, southeastern Saskatchewan.
To date, this record has been exploited successfully but solely for its biostratigraphic significance; the evolutionary significance of lineages, reconstructed through biostratigraphy, has not been realised because the tooth function of conodont elements has been determined only very recently.
Other chapters offer a detailed analysis of the marine platform-deltaic system of Argentina's San Rafael Block and the upper Devonian miospore and conodont zone correlation in western Europe.
Although unconformities separate these carbonate units (the Walberg Unconformity separates the Columbus Limestone from the underlying Salina undifferentiated and the australis conodont zone is unrecorded in Central Ohio [Sparling 1983, 1985] between the Columbus Limestone and the overlying Delaware Limestone), the Silurian and Devonian carbonates act as a single hydrologic unit, confined below by Ordovician shale-rich units.
In terms of North Atlantic conodont succession the stage seems to correspond to the uppermost part of the Pygodus anserinus Zone, the Prioniodus variabilis (most part of the stage) and to the lowermost Prioniodus gerdae subzones of the Amorphognathus tvaerensis Zone (Mannil 1986)".
Conodonts from the condensed interval represent several standard Chesterian conodont zones and, by comparison with conodonts from the rest of the section, sugge st a tentative correlation of the Bangor to no more than the Haney Limestone through the lower part of the Menard Formation in the standard North American Illinois Basin section.
Less than half of the 42 samples collected for conodont studies were productive, and only 163 elements were obtained.