6533b833fe1ef96bd129c448
RESEARCH PRODUCT
Guodunites, a low-palaeolatitude and trans-panthalassic Smithian (Early Triassic) ammonoid genus
Hugo BucherHugo BucherThomas BrühwilerArnaud BrayardArnaud BrayardJames F. Jenkssubject
010506 paleontologySouth chinaOmanCeratitida • oceanic currents • Oman • Proptychitidae • Smithian (Early Triassic) • South China • UtahEarly TriassicCeratitida10125 Paleontological Institute and Museum010502 geochemistry & geophysics01 natural sciencesUtah.Paleontologyoceanic currentsGenusUtahCeratitidaSouth ChinaEcology Evolution Behavior and Systematics0105 earth and related environmental sciencesTerranebiologyPaleontologyProptychitidaebiology.organism_classification1911 Paleontology1105 Ecology Evolution Behavior and Systematics560 Fossils & prehistoric lifeBiological dispersal[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/PaleontologyGeologySmithian (Early Triassic)description
11 pages; International audience; Based on new, bed-rock controlled material from Oman and Utah, USA, the Early Triassic genus Guodunites, which was recently erected on the basis of scarce specimens from northwestern Guangxi, South China, is now shown to be a representative of Proptychitidae. This solves the question of the previously unknown phylogenetic affinity of this genus. The genus is restricted to the late middle Smithian, and to date, its biogeographical distribution comprises Oman, South China and Utah, thus indicating an essentially low palaeolatitudinal distribution during the Early Triassic. Its palaeobiogeographical distribution further strengthens the existence of significant equatorial faunal exchanges between both sides of the Panthalassa at that time. It also suggests that, in addition to the potential stepping stones represented by Panthalassic terranes, vigorous equatorial oceanic currents must have contributed largely to the dispersal of ammonoids during such time intervals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-03-01 |