Abstract Ammonoids suffered a diversity bottleneck during the Permian-Triassic mass extinction (PTME) and experienced rapid diversification in Early Triassic. However, kinds of ammonoids that were more likely to survive PTME fueled subsequent are still poorly known. We compiled comprehensive morphological data set used nonmetric multidimensional scaling method reveal impact on selectivity ammon...

The end-Permian mass extinction (EPME) led to a severe terrestrial ecosystem collapse. However, the ecological response of insects EPME remains poorly understood. Here, we report new species assigned Chauliodites , tongchuanensis sp. nov. (Grylloblattida: Chaulioditidae), from Middle Triassic Tongchuan Formation Shaanxi, northwestern China, and redescribe fuyuanensis ( Lin, 1978 ) Lower Kayitou...

The extinction curve derived from ISO mid-infrared (IR) observations of the Galactic center (GC) exhibits a surprisingly flat behavior in the ∼ 3 to 8 μm region, contrary to the deep minimum expected from standard interstellar dust models consisting of bare silicate and graphite dust particles. We show that this extinction is likely caused by the presence of metallic needles in the interstellar...