Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan

Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan
149
caudal fin rays from Kitakyushu and China.
A. pratdorsalis
gen. et sp. nov.
Paralycoptera wui
Yungkangichlys hsilanesis
57.7-146.7 mm 67.0 mm 36.0 mm
11-13 10 11
15-17 18 19
35
(17+18)
40-42
(20-22+20)
44
(22+22)
15 20-22 16(20?)
2.7-2.8 3.0-3.4 2.1
1.2
D/A A/D D=A
Aokiichthys toriyamai sp. nov.
(Figs. 31-34, PI. 44)
Diagnosis. It differs from other species of the genus Aokiichthys in having the
combination of following characters. The body is moderate and the body depth is
contained 3.0 to 3.7 times in the standard length. The median fins are relatively
posterior in position. The dorsal origin is vertical with the anal origin. The
number ofprincipal dorsal fin rays is 9 to 12. The number ofprincipal anal fin rays
is 18 to 20. The range ofsize is 34.8 to 74.9 mm in standard length. The number
of vertebrae is 35 to 36, with 17 to 19 caudal vertebrae. The number of ribs is 14 to
15.
Holotype.
exposed.
KMNH VP 100,160, an almost complete specimen, with its left side
The standard length is 34.8 mm.
Paratypes. KMNH VP 100,160, an almost complete specimen with its left side
exposed, with the counter part ofthe anterior part ofthe body. The standard length
is 40.2 mm. KMNH VP 100,162, an almost complete specimen with its right side
exposed. The standard length is 72.8 mm. KMNH VP 100,163, an almost com
plete specimen with its left side exposed, but a part ofdorsal fin and a posterior part
of the lower lob of the caudal fin are missing. The standard length is 36.7 mm.
KMNH VP 100,164, an almost complete specimen with its left side exposed. The
standard length is 74.9 mm. KMNH VP 100,165, an almost complete specimen
with its left side exposed. The standard length is 71.1 mm.
Locality. Tokuriki (TO-1), Kokura-minami-ku (Kokura Southern Ward), Kitakyu-