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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Neospathodus
Taxonomy and correlation of Lower Triassic (Spathian) segminate conodonts from Oman and revision of some species of Neospathodus
Neospathodus Praekummeli-A New Species of Conodont from Lower Triassic of Spiti
Key elements of the Neospathodus dieneri and Novispathodus waageni Zone...
Fig. 14. ( 1–4 ) Neospathodus dieneri Sweet. (1, 2) Morphotype 1 Zhao and...
Conodont P 1 elements recovered from Jiarong section, south China. Note: S...
Mg/(Mg + Ca) ratio variation for studied sections (see Fig. 1 for locatio...
Conodont Biostratigraphy of the Lower Triassic in Spiti Himalaya, India
SEM photos of conodonts from the Lower Triassic strata of the Bianyang sect...
Conodont biostratigraphy of the Lower Triassic Mackenzie Dolomite Lentil, Sulphur Mountain Formation in the Cadomin area, Alberta
Key elements of Sweetospathodus kummeli and Ns. dieneri Zones character...
SEM photographs of the key elements of conodonts from the Motianling sectio...
Sequences of Permian samples from the western United States include specimens of most species described from single samples from Greenland, Germany, Sicily, Greece, Pakistan, and China. Wolf-campian collections from Nevada and Utah include abundant Idio-gnathodus, some Adetognathus and “Gnathodus,” and representatives of a few Gondolella species. Two assemblage zones are recognized in the Nevada Riepe Springs and Riepetown Formations (Wolfcampian) ; the Idiognathodus ellisoni Assemblage Zone in the lower part and the Gondolella bisselli-Spathognathodus whitei Assemblage Zone in the upper part. Elements of the faunas of these zones have been reported from the Kansas Big Blue Group and the Wyoming Tensleep Formation. Leonardian faunas are poorly known but lower Leonard strata include sequences of samples with Streptognathodus sulcoplicatus, and younger Leonardian rocks contain specimens of this species and representatives of Gondolella, including G. idahoensis. Early Guada-lupian (Wordian) strata contain the Gondolella serrata fauna, which includes many of the same species that are present in older Leonardian rocks, and a fauna characterized by Neospathodus arcucristatus. Higher Guadalupian (probably lower Capitanian) rocks are characterized by abundant Gondolella rosenkrantzi. The Plympton and Gerster Formations of eastern Nevada contain the N. arcucristatus and G. rosenkrantzi faunas, respectively, and upper Gerster beds contain Neospathodus divergens. Elements of these faunas have also been reported from late Guadalupian or younger strata in the German Zechstein and in Greenland. Youngest Permian conodonts known are those described by Sweet (1970) from Pakistan and include species formerly assigned to Spathognathodus. Earliest Permian faunas are dominated by platform genera of Late Pennsylvanian type. These rapidly became extinct during the later Early Permian and were replaced during the Middle and Late Permian by new species of Gondolella, Neospathodus, and several new genera, some of which are also important in Early Triassic faunas.