Early Tournaisian ammonoids from Timimoun (Gourara, Algeria)

Ebbighausen, V.; Bockwinkel, J.; Korn, Dieter; Weyer, D.

doi:10.5194/fr-7-133-2004

Cited by 2 publications

(1 citation statement)

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“…6. Gara el Kahla, 35 km south-west of Timimoun (Gourara, Algeria); Early Tournaisian Gattendorfia assemblage; 15 specimens in total, predominantly prionoceratids and a few early prolecanitids (Ebbighausen et al, 2004). 7.…”

Section: Methodsmentioning

confidence: 99%

Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

et al. 2021

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Septal crowding is widely known as a sign of maturity in conchs of ammonoids and nautiloids. However, reduced septal spacing may also occur as a consequence of adverse ecological conditions. Here, we address the question how septal spacing varied through ontogeny in representatives of some of the major clades of Devonian and Carboniferous ammonoids. We found that the degree of ontogenetic variation is similar between clades and that variation is only weakly linked with conch form. The results show that septal crowding alone is insufficient to identify adulthood in ammonoids; intermediate septal crowding is a common phenomenon and occurs in various growth stages. Changes in septal distances during ontogeny were, in addition to adulthood of the individuals, a passive reaction likely caused by fluctuating environmental conditions.

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Section: Methodsmentioning

confidence: 99%

Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

et al. 2021

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Global Carboniferous brachiopod biostratigraphy

Angiolini

Cisterna

Mottequin

et al. 2021

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We present an updated look at the Carboniferous brachiopod biozonation from most of the world framed into a revised Carboniferous palaeogeography, based on a selection of the literature published on Carboniferous brachiopods since the Nineteenth century. The biostratigraphic significance of the most important brachiopod taxa is synthetized in seven geographic correlations.The Mississippian is characterized by rich brachiopod faunas, with widespread taxa with a good potential for global correlation, such as Rugosochonetes, Delepinea, Buxtonia, Antiquatonia, Spinocarinifera, Marginatia, Fluctuaria, Ovatia, Rhipidomella, Lamellosathyris, Unispirifer, Tylothyris, and Syringothyris. From the mid–Viséan to the late Serpukhovian, taxa of gigantoproductidines are biostratigraphically significant, and occur everywhere except for South America and Australia, which remain as distinct faunal successions for most of the period. A major turnover occurs at the beginning of the Pennsylvanian, characterized by a higher degree of provincialism. Pennsylvanian brachiopod faunas are diverse in China, Russia and North America, but otherwise they are less developed and they are characterized mostly by endemic taxa, hampering long–distance correlation. An exception is the rapid diversification of taxa of the Choristitinae, which were widespread from the Bashkirian to the Moscovian, allowing long–distance correlation.

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Early Tournaisian ammonoids from Timimoun (Gourara, Algeria)

Cited by 2 publications

References 1 publication

Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

Global Carboniferous brachiopod biostratigraphy

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