岐阜県吉城郡上宝村福地の新産デボン紀三葉虫

概要

論文の詳細を見る
Among 15 known species of trilobite from the Middle Paleozoic rocks in Japan, 9 species have been reported in the Devonian. Here we can add to them 4 species which were found in the Fukuji Series in Gifu Prefecture as follows: 1. Gravicalymene? sp. 2. Crotalocephalus sp. α (small form) 3. Crotalocephalus sp. β (large form) 4. Scutellum sp. Of the first species some cranidia, hypostoma and pygidia are known as the first occurrence in our country. Two forms of Crotalocephalus seem to be allied to the Crotalocephalus species reported by KOBAYASHI & IGO (1956). However, they were obtained from the limestone apparently lower than the latter's horizon. Scutellum species is represented by a fragmentary but characteristic pygidium.
地学団体研究会の論文
1970-09-25