Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan

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204 Yoshitaka Yabumoto 1mm Fig. 70. Diplomistus kokuraensis Uyeno, 1979, caudal skeleton of KMNH VP 100,035. From Uyeno, 1979. The number of dorsal fin pterygiophores is 11 to 12. The number of anal fin pterygiophores is 20 to 22. The total number of vertebrae is 36, with 20 abdominal vertebrae and 16 caudal vertebrae. The ventral scutes are well-developed, and their number is 17 to 18, with 9 scutes between the pectoral and pelvic fins, and 8 scutes between the pelvic and anal fins. The number of predorsal interneural spines is 7. The intermuscular bones are well developed. Description ofthe holotype. The body is thick and the body depth is contained 1.9 times in the standard length. The head length is contained 3.4 times in the standard length. The dorsal fin is situated at about the middle of the body, and the pelvic fin, below the dorsal fin. The pectoral fin is situated near the ventral edge of the body at the posteroventral corner of the head. The number of dorsal fin pterygiophores is 12, and the number of anal fin pterygiophores is 23. Four predorsal scutes are visible. The ventral scutes are well-developed, totaling 17 in number, with 9 scute between the pectoral and pelvic fins, and 8 scutes between the pelvic and anal fins. The total number of vertebrae is 32, with 18 abdominal and 14 caudal vertebrae. Seven predorsal interneural spines are present. The neural spines of the first to the 7th vertebrae are divided into two. The intermuscular bones are well-developed. At least 2 epurals are visible. A parhypural and 6? hypurals are present. Description of additional specimens. In KMNH VP 100,203, the body depth is contained 2.7 times in the standard
Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan 205 EP1—3 CSC Fig. 71. Diplomistus kokuraensis Uyeno, 1979, caudal skeleton of the paratype, KMNH VP 100,035. From Uyeno and Yabumoto, 1980. length. The head length is contained 3.8 times in the standard length. The number of dorsal fin rays is 10. The number of dorsal fin pterygiophores is 10. The number of anal fin rays is 17. The number of anal fin pterygiophores is 17. Four predorsal scutes are visible. The number of ventral scutes is 17, with 11 scutes between the pectoral and pelvic fins, and 6 scutes between the pelvic and anal fins. The total number of vertebrae is 35, with 17 caudal vertebrae. The number of ribs is 16. The depth between the dorsal margin of the body and the abdominal vertebral column at the maximum depth of the body is contained 2.2 times in the depth between the abdominal vertebral column and the ventral margin of the body. In KMNH VP 100,204, the body depth is contained 2.6 times in the standard length. The head length is contained 3.7 times in the standard length. The number of dorsal fin rays is 10. The number of dorsal fin pterygiophores is 10. Five predorsal scutes are visible. The number of ventral scutes is 17, with 9 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. The depth between the dorsal margin of the body and the abdominal vertebral column at the maximum depth of the body is contained 1.9 times in the depth between the abdominal vertebral column and the ventral margin of the body. In KMNH VP 100,205, the body depth is contained 3.1 times in the standard length. The head length is contained 3.6 times in the standard length. The number of dorsal fin rays is 12. The number of ventral scutes is 16, with 10 scutes between the pectoral and pelvic fins, and 6 scutes between the pelvic and anal fins. The total number of vertebrae is 34, with 16 caudal vertebrae. The number of ribs is 16. The depth between the dorsal margin of the body and the abdominal
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Bull. Kitakyushu Mus. Nat. Hist., 1
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Fig. 19. Chuhsiungichthys yanagidai
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40-42 2.9 Early Cretaceous Freshwat
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Early Cretaceous Freshwater Fish Fauna in Kyushu, Japan

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