Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan

Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan 131
1974 from Upper Cretaceous of Yunnan Province in China, C.yanagidai sp. nov. and
C.japonicus sp. nov.
Chuhsiungichthys yanagidai sp. nov.
(Figs. 17-21, Pis. 39-40)
Diagnosis. This species differs from other species in having the combination of
following characters. The dorsal fin is large and long. The dorsal origin is slightly
before the anal origin. The length of the first dorsal fin ray is contained 4.7 times in
the standard length. The length of the dorsal fin base is contained 1.4 times in the
anal fin base. The number of dorsal fin rays is 20. The number of anal fin rays is
32 and this number is the smallest in this genus. The total number of vertebrae is
40 to 42, with 21 to 24 caudal vertebrae. The number of ribs is 17. The body
depth is contained 3.6 times in the standard length. The head length is contained
4.0 times in the standard length.
Holotype. KMNH VP 100,148, an almost complete specimen, but the bones of the
head region is poorly preserved and the anterior and posterior parts of the caudal
vertebrae slightly are moved. The standard length is 168.2 mm.
Paratype. KMNH VP 100,149, an incomplete specimen, the dorsal part of the head
is missing, anterior caudal vertebrae is detached. The standard length is 120.0 mm.
Locality.
Tokuriki (TO-1), Kokura-minami-ku (Kokura Southern Ward), Kitakyu-
Rt(
10mm
Fig. 17. Chuhsiungichthys yanagidai sp. nov., the dorsal fin of the holotype, KMNH VP
100,148.