Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan

Early Cretaceous Freshwater Fish Fauna in Kyushu,Japan 219
Fig. 82. Diplomystus sp., caudal skeleton of KMNH VP 100,211.
are 23 anal fin pterygiophores. The number of ventral scutes is 19, with 4 scutes
below the pectoral fin, 11 scutes between the pectoral and pelvic fins, and 8 scutes
between the pelvic and anal fins. The total number of vertebrae is 35, with 16
caudal vertebrae. The number of ribs is 17. Seven median supraneurals are
present. The first supraneural is wide and leaf-shape with a ridge running from the
dorsal end to the ventral end.
In KMNH VP 100,214, the body depth is contained 3.5 times in the standard
length. The head length is contained 3.7 times in the standard length. The dorsal
fin base is contained 1.8 times in the anal fin base. The number of principal dorsal
fin rays is 11. There are 11 dorsal fin pterygiophores. The number of principal
anal fin rays is 25. There are 25 anal fin pterygiophores. Five dorsal scutes are
visible. The number of ventral scutes is 18, with 10 scutes between the pectoral and
pelvic fins, and 8 scutes between the pelvic and anal fins. The total number of
vertebrae is 34, with 16 caudal vertebrae. The number of ribs is 16. Seven median
supraneurals are present.
In KMNH VP 100,215, the body depth is contained 3.5 times in the standard
length. The head length is contained 3.9 times in the standard length. The
number of ventral scutes is 18, with 11 scutes between the pectoral and pelvic fins,
and 7 scutes between the pelvic and anal fins. The total number of vertebrae is 34,
with 16 caudal vertebrae. The number of ribs is 16. Six median supraneurals are
present. The first preural centrum bears the plate like parhypural. The first
hypural is the largest. The second hypural is about half of the first one in width.
The second hypural is fused with the first ural vertebra.