Research on Graptolites confirm the precise stratigraphic correlation of Upper Ordovician in Myanmar
As a predominant category in the Paleozoic evolutionary fauna, grapholites increased rapidly in the Ordovician and evolved rapidly. Late Ordovician graptolites from the Mandalay Region, Myanmar were first collected and reported by Reed in 1915, and then there were few reports after that.
Based on detailed
systematic paleontological description and identification, 13 species in 5
genera (Avitograptus, Korenograptus, Metabolograptus, Neodiplograptus and
Normalograptus) were described from the Mandalay Region. Two of these species,
Korenograptus selectus X. Chen n. sp. and Neodiplograptus mandalayensis X. Chen
n. sp., were new. On the basis of the community analysis and international
correlation, a biostratigraphic scheme for the uppermost Ordovician
(Hirnantian: Metabolograptus extraordinarius Biozone and Metabolograptus?
persculptus Biozone) strata was erected in this area.
Xu*, Chen Qing, Kyi Pyar Aung, Lucy A. Muir. 2020. Latest Ordovician
graptolites from the Mandalay Region, Myanmar. Palaeoworld, 29: 47–65. https://doi.org/10.1016/j.palwor.2019.09.003
Graptolite species range chart of the Upper Ordovician interval in the Shwethin Village–Yebyantaung waterfall section, Mandalay, Myanmar
Typical graptolites pictures