First Fossil Record of the Family Phormosomatidae (Echinothurioida : Echinoidea) from the Early Miocene Morozaki Group, Central Japan
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概要
- 論文の詳細を見る
A fossil echinothurioid echinoid is described from the Early Miocene Morozaki Group in the Chita Peninsula of Aichi Prefecture, central Japan. Based on geological observations, the fossil species is supposed to be the inhabitant of the bathyal zone. The diagnosis of the species is as follows : A small body size for an echinothurioid, large and deep areoles in the oral side, slender teeth with a sharp point, and a large peristome area. From the supposed habitat and the diagnosis, this species is considered to be identical with or a direct ancestor of Phormosoma bursarium, a common extant species in the bathyal zone of the Indo-Pacific region including the southern coasts of the Japanese main islands. This is not only the first fossil record in the world of the family Phormosomatidae, but also the third fossil species for the order Echinothurioida.
- 社団法人日本動物学会の論文
- 1994-04-15
著者
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Ohta Suguru
Ocean Researcg Institute, University of Tokyo
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Amemiya S
Univ. Tokyo Tokyo Jpn
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Amemiya Shonan
Laboratory Of Innovational Biology Department Of Integrated Biosciences Graduate School Of Frontier
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Amemiya Shonan
Misaki Marine Biological Station Faculty Of Science University Of Tokyo
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Mizuno Yoshiaki
Tokai Fossil Society
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Amemiya Shonan
Misaki Marine Biological Station University Of Tokyo
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