Lethaia《国际古生物学与地层学杂志》(季刊). Lethaia is a quarterly open access journal that publishes articles of international interest in the fields of palaeontology and stratigraphy. Articles concentrate on the development of new ideas and methods, and on descriptions of new features of wide significance. Palaeobiology, integrating the study of fossil organisms with modern biology, and palaeoecology are core topics of the journal.