Indian metoposaurid amphibians revised
スポンサーリンク
概要
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A recent collection of more than a hundred fossil bones belonging to at least six individuals of metoposaurids from the basal part of the Late Triassic, Maleri Formation of the Pranhita-Godavari valley, Gondwana succession, has helped to formulate new ideas. Detailed morphological studies have been used to include all specimens of metoposaurids so far collected from India within a single taxon, Buettneria maleriensis, a new combination. A reconstruction of the skeleton of Buettneria maleriensis is presented for the first time. Buettneria maleriensis remains are common in the continental red beds of India, deposited under fluvial conditions witnessing seasonal climate changes. While some bones of Buettneria maleriensis were rolled and transported after death and are now found as sporadic fossils in mudstone (or occasionally in sandstones and calcirudites), the other type of occurrences, the rich accumulation of bones, are present only in mudstones. Buettneria maleriensis was replaced by the Chigutisauridae, a temnospondyl family exclusive to Gondwanaland. India is the only place where both metoposaurids and chigutisaurids are found in such close succession. The paleoposition of India during the later part of the Triassic may have been responsible for this.
- 日本古生物学会の論文
- 2002-04-28