千葉県木更津市桜井の上部更新統木下層産の魚類耳石化石
1991 年 45 巻 4 号 p. 259-274
詳細
1991 年 45 巻 4 号 p. 259-274
Fossil fish otoliths from the Upper Pleistocene Kioroshi Formation in Sakurai, Kisarazu City, Chiba Prefecture, are described. Following 16 species are first reported from the Kioroshi Formation: Trachinocephalus myops (Schneider), Neoscopelus sp., Rhynchocymba sp., Uroconger sp., Trachurus Japonicus (Temminck et Schlegel), Argyrosomus argentatus (Houttuyn), Sillago japonica Temminck et Schlegel, S. paruisquamis Gill, Evynnis sp., Calliurichthys sp., Callionymus sp. cf. C. richardsoni Bleeker, Chaeturichthys sp., Sagamia genionema (Hilgendorf), Hypodytes rubripinnis (Temminck et Schlegel), Cociella sp., Engyprosopon sp.. Though deep-sea (36%) and shallow-sea (64%) fish otoliths co-occurred from the Kioroshi Formation, the sedimentary environment of this formation is presumed to have been the sandy and muddy bottom of the sea, of which the depth was 5-50m, and the temperature was the same as that of the Recent Bay of Tokyo or somewhat warmer. A predatory, Cociella sp., and a preyed, Callionymus sp. cf. C. richardsoni Bleeker, co-occurred.
