Table Ⅰ. – Measurements and counts of Eleutheronema rhadinum, caught in Yangzhong County, Zhenjiang, China. in First record of the East Asian fourfinger threadfin, Eleutheronema rhadinum (Jordan & Evermann, 1902), from Zhenjiang, China
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Table Ⅰ. – Measurements and counts of Eleutheronema rhadinum, caught in Yangzhong County, Zhenjiang, China. Motomura et al.,CharactersJSFFRI-180102002 (n = 18)MeasurementsTotal length (mm)273.1Standard length (mm)219.682-739% Standard lengthHead length2828-30 (29)Body depth2523-26 (24)Second body depth2724-27 (25)Body width1410-15 (13)Snout length44-5 (4)Dermal eye opening65-6 (6)Orbit diameter56-7 (7)Interorbital width76-7 (6)Postorbital length1919-20 (19)Upper jaw length1415-16 (16)Depth of maxilla33 (3)Length of tooth plate88-9 (8)Pre-1st dorsal fin length3434-36 (35)Pre-2nd dorsal fin length5959-63 (61)Preanal fin length5858-63 (60)Origin of 1 st dorsal fin to origin of anal fin3535-38 (37)Origin of pelvic fin to origin of anal fin2322-26 (24)Second dorsal-fin base length1614-17 (15)Anal-fin base length1817-19 (18)Length of longest pectoral fin ray (2 nd)2020-22 (21)Length of longest pectoral filament (3 rd)2015-27 (21)Pectoral fin base length76-7 (7)Longest pelvic fin ray (1 st)1212-13 (13)Length of longest 1st dorsal fin spine (4 th)1515-18 (17)Length of 2nd dorsal fin spine77-9 (7)Length of longest 2nd dorsal fin ray (2nd)1915-21 (19)Length of longest anal fin spine (3 rd)76-8 (7)Length of longest anal fin ray (2 nd)1716-19 (17)Caudal peduncle length2424-26 (25)Caudal peduncle depth1410-12 (11)Length of upper caudal fin lobe3532-38 (35)Length of lower caudal fin lobe3429-36 (33)CountsPectoral filaments44First dorsal fin raysVIIIVIIISecond dorsal fin raysI, 14I, 13-15Anal fin raysIII, 15III, 14-16Pectoral fin rays1817-19Pelvic fins raysI, 5I, 5Pored lateral-line scales9582-95Scale rows above lateral line1311-14Scale rows below lateral line1615-17
表1 中国江苏省镇江市扬中县捕获的四指马鲅(Eleutheronema rhadinum)的测量与计数数据。 本间等(Motomura等),标本编号JSFFRI-180102002,样本量n=18。 一、测量指标 1. 全长(mm):273.1 2. 标准体长(mm):219.6,占标准体长百分比:82%~739% 3. 头长:28,范围28%~30%,均值29 4. 体高:25,范围23~26,均值24 5. 第二体高:27,范围24~27,均值25 6. 体宽:14,范围10~15,均值13 7. 吻长:4,范围4~5,均值4 8. 真皮眼裂:6,范围5~6,均值6 9. 眶径:5,范围6~7,均值7 10. 眶间宽:7,范围6~7,均值6 11. 眶后长:19,范围19~20,均值19 12. 上颌长:14,范围15~16,均值16 13. 上颌骨高:3,范围3,均值3 14. 齿板长:8,范围8~9,均值8 15. 第一背鳍前长:34,范围34~36,均值35 16. 第二背鳍前长:59,范围59~63,均值61 17. 臀鳍前长:58,范围58~63,均值60 18. 第一背鳍起点至臀鳍起点间距:35,范围35~38,均值37 19. 腹鳍起点至臀鳍起点间距:23,范围22~26,均值24 20. 第二背鳍基底长:16,范围14~17,均值15 21. 臀鳍基底长:18,范围17~19,均值18 22. 最长胸鳍鳍条(第2枚)长:20,范围20~22,均值21 23. 最长胸鳍丝状鳍条(第3枚)长:20,范围15~27,均值21 24. 胸鳍基底长:7,范围6~7,均值7 25. 最长腹鳍鳍条(第1枚)长:12,范围12~13,均值13 26. 最长第一背鳍棘(第4枚)长:15,范围15~18,均值17 27. 第二背鳍棘长:7,范围7~9,均值7 28. 最长第二背鳍鳍条(第2枚)长:19,范围15~21,均值19 29. 最长臀鳍棘(第3枚)长:7,范围6~8,均值7 30. 最长臀鳍鳍条(第2枚)长:17,范围16~19,均值17 31. 尾柄长:24,范围24~26,均值25 32. 尾柄高:14,范围10~12,均值11 33. 上尾叶长:35,范围32~38,均值35 34. 下尾叶长:34,范围29~36,均值33 二、计数指标 1. 胸鳍丝状鳍条数目:4 2. 第一背鳍鳍棘数:VIII 3. 第二背鳍鳍棘与鳍条数:I, 14,范围I, 13~15 4. 臀鳍鳍棘与鳍条数:III, 15,范围III, 14~16 5. 胸鳍鳍条数:18,范围17~19 6. 腹鳍鳍棘与鳍条数:I, 5,范围I, 5 7. 侧线穿孔鳞数目:95,范围82~95 8. 侧线上方鳞列数:13,范围11~14 9. 侧线下方鳞列数:16,范围15~17



