Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan

Early Cretaceous Freshwater Fish Fauna in Kyushu,Japan
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Table 6.
Comparison of charactersin the species of the new genus Paraleptolepis.
Paraleptolepis kikuchii
gen. et sp. nov.
P. elegans gen et sp. nov.
Counts
D. 11-12
D. pterygiophore 10-12
A. 17-19
A. pterygiophore 17-19
P. 10-11
P2 5
C. 18
V.
40-42
(20--22 + 20-19)
ribs 18-20
ratio
10-12
10-11
18-19
18-20
12
5-6
19
41-42
(22+19-20)
20
SL/BD 3.2-3.7
SL/HL 3.5-4.3
AB/DB 1.4-1.6
other character
Size of pelvic fin
small
4.7-5.5
4.1-5.1
4.5-2.5
middle
A., anal fin rays; AB, anal fin base; BD, body depth; C, caudal fin rays; D., dorsal fin
rays; DB, dorsl fin base; HL, head length; P,, pectoral fin rays; P2, pelvic fin rays; SL,
standard length; V., vertebrae.
vertebrae. The number of ribs is 20.
Holotype. KMNH VP 100,227, an almost complete specimen with its right side
exposed, but the posterior part of the caudal fin is missing. The standard length is
48.9 mm.
Paratypes. KMNH VP 100,228, an almost complete specimen with its left side
exposed, but the anterior part of the head region and the pelvic fin are missing. The
length from the pelvic insertion to the posterior margin of the hypural is 30.3 mm.
KMNH VP 100,229, an almost complete specimen with its right side exposed, but a
part between the end of the dorsal fin base and the middle of the anal fin base is
missing. The standard length is 41.0 mm. KMNH VP 100,230, an almost com
plete specimen with its right side exposed, but the caudal bones are missing. The
length from the snout to the posterior end of the first preural centrum is 35.6 mm.
KMNH VP 100,231, an almost complete specimen with its right side exposed, but
the anterior end of the head and the posterior part of the caudal fin are missing.
Thestandard length is 58.8 mm. KMNH VP 100,232, an almost complete specimen
with its right side exposed, but a part of the caudal region is missing. The standard