Early Triassic Conchostracans (Crustacea: Branchiopoda) from the terrestrial Permian–Triassic boundary sections in the Moscow syncline

Biostratigraphic correlation and mass extinction during the Permian-Triassic transition in terrestrial-marine siliciclastic settings of South China

“…For PTB sections that lack conodonts and ammonoids, biostratigraphic subdivisions and correlations are often based on bivalve assemblages. From the end of the Late Palaeozoic to the Late Mesozoic, conchostracans have the highest biostratigraphic significance of all terrestrial fossils, and in some intervals Weems, 2010, 2011;Scholze et al, 2015), they play the same role as ammonoids and conodonts in pelagic marine beds. They are distributed across a wide range of ecological dimensions and geographic regions, as well as in a variety of facies, such as freshwater deposits, brackish deposits, deltaic marginal marine beds, and some bedding planes or brackish intervals of very shallow marine deposits, which offer the greatest potential for correlation with marine facies (Kozur and Weems, 2010).…”

“…Euestheria gutta was the dominant conchostracan fossil in each section. Previous studies have shown that Euestheria gutta was widespread in Early Triassic deposits from different areas, including the Calvörde Formation and Bernburg Formation of the Germanic Basin (Kozur and Seidel, 1983), the Rybinskian horizon on the Russian platform (Lutkevitch, 1937), and the Vokhma Formation in the Moscow Syncline (Scholze et al, 2015). The Euestheria gutta-bearing conchostracan fauna has been assigned an Early Triassic stratigraphic range in Central Russia and Germany, though the real lowest stratigraphic extent of this species seems to be less certainly known, due to the poorly-preserved specimens that were found in the uppermost Zechstein Group (Fulda Formation; Late Permian) of the Germanic Basin (Kozur and Weems, 2010).…”

Microsculpture Study of Late Permian and Early Triassic Conchostracans From the Babii Kamen Section (Western Siberia)

“…in the Babii Kamen section. This species is an indicator of the Lower Triassic [4,18,20] and has a fine pitted shell microsculpture ( Fig. 3).…”

A Hope for an Integrated Taxonomy of Fossil and Extant Clam Shrimps

“…All these special features make clam shrimps the very successful colonizers of ephemeral freshwater ecosystems [4] under a wet and dry alternating climate setting in the earth history [5]. This results in very abundant fossil records worldwide in the Mesozoic fine lacustrine deposits [6]- [11].…”