YABUMOTO, Y. & UYENO, T. (1994) (Meso Cénozoïque Japon).pdf


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258

Y. Yabumoto and T. Uyeno

Table 11 Middle Miocene elasmobranchs from the Mizunami
Group in Gifu Prefecture (Itoigawa et al. 1985). Locality no.
24 in Fig. 1.

Table 12 Middle Miocene elasmobranchs from the Ichishi Formation in Tsu, Mie Prefecture (Uyeno et al. 1980). Locality no.

Chlamydoselachidae

Chondrichthyes
Lamnidae

Chlamydoselachus? sp.
Hexanchidae

Hexanchus spp.
Heptranchias? sp.

27 in Fig. 1.

Carcharodon sulcidens (Agassiz)
Isurus oxyrinchus Rafinesque
Carcharodon meaalodon (Aaassiz)

Orectolobidae

Nebrius delfortriei (Daimeries)
Odontaspididae

Odontaspis acutissima Agassiz
Odontaspis, cf. volax Le Hon
Odontaspis cuspidata (Agassiz)
Pseudocarcharias sp.
Scyliorhinidae
Galeus? sp.
Lamnidae
Alopias, cf. latidens (Leriche)
Alopias cfr. exigua (Probst)
Alopias sp.
Cetorhinus spp.
Carcharodon megalodon (Agassiz)
Isurus benedeni (Le Hon)
Isurus retrojfexus (Agassiz)
Isurus desori (Sismonda)
Isurus hastalis (Agassiz)
Isurus, cf. paucus Guitart Manday
Isurus, cf. oxyrinchus Rafinesque
Carcharhinidae
Hemipristis serra Agassiz
Carcharhinus eggertoni (Agassiz)
Carcharhinus spp.
Galeocerdo aduncus Agassiz
Negaprion kraussi (Probst)
‘Negaprion’ cfr. acanthodon (Le Hon)
Sphyrnidae
Sphyrna sp.
Squalidae
Squalus spp.
Dalatias licha (Bonnarterre)
Pristiophoridae
Pristiophorus sp.
Squatinidae
Squatina sp.
Rhinobatidae
Rhynchobatus spp.
Rajidae
Raja spp.
Dasyatidae
‘Dasyatis’ nipponensis (Hatai & Kataka)
Dasyatis sp.
Myliobatididae
Aetobatis sp.
Rhinoptera sp.
Mobulidae
Manta sp.
Mobula? sp.

Kwanmon Group in Kitakyushu City of Fukuoka
Prefecture (Uyeno 1979; Yabumoto 1994). Many
freshwater fish fossils are found from Neogene
sediments in Japan. Among them, the freshwater
fish fossils from Iki Island in Nagasaki Prefecture

(Hayashi 1975) and Kusu Basin in Oita Prefecture
(Uyeno et al. 1975b; Yamumoto 1987b) are representatives of Miocene and Pleistocene freshwater
fishes in Japan.
FAUNAL CHANGES AMONG THE LATE MESOZOIC AND
CENOZOIC FISHES IN JAPAN

Considerable changes in fish faunas occurred a t the
end of the Cretaceous. Elasmobranch genera Ptychodus, Notidanodon, Hexanchus, Squalicorax,
Scapanorhynchus,
Cretolamna, Orthacodus,
Paraorthacodus, Ischyrhixa and others are found
in the Cretaceous sediments. Hexanchus, Carcharodon and Odontaspis are abundant in Oligocene
sediments. Cretaceous genera Ptychodus, Squalicorax, and Ischyrhixa seem to become extinct a t
the end of the Cretaceous. Shark fossils are especially abundant in Miocene beds. After the Early
Miocene, modern sharks of the family Carcharhinidae became abundant, and sharks of the Hexanchidae and Lamnidae were on the decline
(Table 22).
Few teleostean marine fish fossils are found in
Cretaceous sediments, for example Eurypholis
from Ehime Prefecture. Abundant teleostean fish
fossils have been found from Miocene beds in
northern Honshu, the Tokai district, Tottori Prefecture and several other localities (Fig. 1). Miocene
fish genera are mostly assignable to extant genera.
Abundant fishes are found from Pleistocene beds in
Tanegashima Island. Most of Pleistocene fishes are
assignable to extant species (Table 23).
Records of marine teleostean fish fossils are few
in the Mesozoic, especially in the Triassic and
Jurassic in Japan, but abundant freshwater fish
fossils are found from the Cretaceous beds in the
northern part of Kyushu Island. This freshwater
fish fauna somewhat resembles faunas of the same
age from southeastern China (Yabumoto 1994).
Abundant freshwater fish fossils are found from
the Miocene sediments, but these fossils have still
not been studied in detail. Further studies are
expected for these Miocene fish fossils. Numerous
pharyngeal teeth of Pliocene cyprinid fishes have