Detailed biostratigraphic scales as based on the palaeobiogenetical approach (an example of the Upper Bajocian – Lower Bathonian ostracod scale of the Russian Platform)
Journal Title: Volumina Jurassica - Year 2017, Vol 0, Issue 1
Abstract
Two new species of ostracods of the family Progonocytheridae Sylvester-Bradley Camptocythere (C.) lateres Tesakova et Shurupova, sp. nov. and C. (C.) angustius Tesakova et Shurupova, sp. nov. from the Michalskii and Besnosovi ammonite zones (Upper Bajocian – Lower Bathonian, Middle Jurassic) of the Sokur section (Saratov) are described. The changes in ontogenesis in the phylogeny of Camptocythere (C.) lateres Tesakova et Shurupova in the stratigraphical interval corresponding to the Palaeocytheridea kalandadzei ostracod Zone, and especially to the beds with C. (C.) lateres, have been studied. The levels of the change in the predominant type of sculpture (corresponding to evolutionary boundaries) are recognized in the sculpture development among the adult representatives of the species in its phylogeny. This palaeobiogenetic (heterochrony) approach allows subdivision of the beds with C. (C.) lateres into three stratigrapical intervals characterized by changes in the type of sculpture.
Authors and Affiliations
Yana Shurupova, Ekaterina TESAKOVA
Keywords
Related Articles
- EP ID EP238762
- DOI 10.5604/01.3001.0010.6074
- Views 66
- Downloads 0
News and Reviews – The Polish-Slovak Working Group of the Jurassic System
News and Reviews – Newsletter of the International Subcomission on Jurassic Stratigraphy: Foreword
Lower Toarcian organic-rich sediments from the Tuscan Succession (Northern Apennines, Italy): preliminary results
For the first time is here documented the presence of Lower Toarcian black shales in the lower portion of the [i]Calcari e marne a Posidonia[/i] (Posidonia Marls [i]auctt[/i].) belonging to the Tuscan Nappe. It consists...
Charakterystyka palinofacjalna najwyższego bajosu i batonu okolic Włocławka
The Upper Sinemurian ammonite succession in the Sierra Madre Oriental (Mexico)
In the Sierra Madre Oriental (Mexico), the biostratigraphic subdivision of the Upper Sinemurian can be refined. It has been possible to differentiate 11 horizons from the upper Obtusum Zone to the top of the Raricostatum...