岐阜県福地層産デボン紀パキポーラ超科床板珊瑚類

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Five tabulate coral species of the superfamily Pachyporoidea are described from the Lower Devonian (Emsian?) of the Fukuji Formation, Gifu Prefecture, Central Japan. They include pachyporids consisting of Hillaepora sp. cf. H. altaica Dubatolov in Dubatolov and Spasskiy, 1964, Isurugiopora obesa gen. et sp. nov., Striatopora takayamaensis sp. nov. and Thamnopora hayasakai sp. nov., and a parastriatoporid of Parastriatopora innae Dubatolov, 1963. Among the previously known pachyporid genera, a new genus Isurugiopora is most similar to Gertholites, differing mainly in its exceptionally inflated median dark line. Dendropora dubrovensis Dubatolov, 1959 from the Givetian of the Kuznetsk Basin, southwestern Siberia is assigned to Isurugiopora. The conspecific and closely related species are reported from the Kuznetsk Basin and Altai of southwestern Siberia. The tabulate coral faunas from Salair and the Kuznetsk Basin of southwestern Siberia, Inner Mongolia, the Urals, Tarim, and Belgium also have comparable species with the Fukuji fauna. From a paleobiogeographic point of view, this fauna shows most strong affinities with those in southwestern Siberia.
2005-12-22