여을멸속 (여을멸과, 여을멸목) 2 미기재종의 분류학적 검토

Abstract

In this study, for clarify the taxonomic position of two undescribed Albula sp., based on one species collected from southerneast of Korea in October 2007 and Taiwan in June 2006, and the other species collected from southerneast of Korea in June 1938, compare with eleven Albula species recognized in the world by morphological and molecular analysis. Albula sp. 1 was easily distinguished from A. nemoptera by length of last dorsal and anal ray (short in Albula sp. 1 vs. elongate in A. nemoptera) and posterior location of maxillary (not reaching to anterior margin of eye vs. reaching to anterior margin of eye). It was distinguished from A. vulpes by distribution (west Pacific in Albula sp. 1 vs. Caribbean Sea in A. vulpes), the number of predorsal scales (25 vs. 14-24), gill rakers (16 vs. 18-24) and vertebrae (77-78 vs. 69-70). It was distinguished from A. glossodonta by anterior shape of lower jaw (pointed in Albula sp. 1 vs. rounded in A. glossodonta). It was differed from A. oligolepis by posterior location of pelvic fin (anterior margin of anus in Albula sp. 1 vs. middle of anus in A. oligolepis), the number of pored lateral line scales (77-80 vs. 61-65), scales above lateral line (9 vs. 7.5-8) and vertebrae (77-78 vs. 64-66). It was differed from A. virgata by posterior location of pelvic fin (anterior margin of anus in Albula sp. 1 vs. posterior margin of anus in A. virgata), the number of anal fin rays (9 vs. 8), pored lateral line scales (77-80 vs. 63-67), gill rakers (16 vs. 18-21) and vertebrae (77-78 vs. 65-68). It was differed from A. argentea by the number of anal fin rays (9 in Albula sp. 1 vs. 8 in A. argentea), pored lateral line scales (77-80 vs. 68-74), predorsal scales (25 vs. 17-24), gill rakers (16 vs. 17-25) and vertebrae (77-78 vs. 71-74). Results of molecular analysis using a total of 524bp mitochondrial DNA cytochrome b sequences, Albula sp. 1 was closest clustered with Albula sp. B among nine Albula species from neighbor-joining tree by genetic distance was d=0.099-0.101, whereas A. vulpes (d=0.125-0.127), A. neoguinaica (d=0.154-0.162) and A. forsteri (d=0.162) were far clustered which were recognized in Korea. Albula sp. 2 was easily distinguished from A. nemoptera by length of last dorsal and anal ray (short in Albula sp. 2 vs. elongate in A. nemoptera) and posterior location of maxillary (not reaching to anterior margin of eye vs. reaching to anterior margin of eye). It was distinguished from A. vulpes by distribution (west Pacific in Albula sp. 2 vs. Caribbean Sea in A. vulpes), the number of pectoral fin rays (16 vs. 17-19), pored lateral line scales (78 vs. 68-77), scales below lateral line (9 vs. 6-7), predorsal scales (27 vs. 14-24) and vertebrae (74 vs. 69-70). It was distinguished from A. glossodonta by anterior shape of lower jaw (pointed in Albula sp. 2 vs. rounded in A. glossodonta). It was differed from A. argentea by posterior location of pelvic fin (not reaching to anterior margin of anus in Albula sp. 2 vs. anterior margin of anus in A. argentea), the number of dorsal fin rays (19 vs. 17-18), anal fin rays (9 vs. 8), pored lateral line scales (78 vs. 68-74), scales below lateral line (9 vs. 5-6) and predorsal scales (27 vs. 17-24). It was differed from A. oligolepis by posterior location of pelvic fin (not reaching to anterior margin of anus in Albula sp. 2 vs. middle of anus in A. oligolepis), the number of pectoral fin rays (16 vs. 17-19), pored lateral line scales (78 vs. 61-65), scales above lateral line (9 vs. 7.5-8), scales below lateral line (9 vs. 6), predorsal scales (27 vs. 18-25) and vertebrae (74 vs. 64-66). It was differed from A. virgata by posterior location of pelvic fin (not reaching to anterior margin of anus in Albula sp. 2 vs. posterior margin of anus in A. virgata), the number of dorsal fin rays (19 vs. 17-18), anal fin rays (9 vs. 8), pectoral fin rays (16 vs. 17-18), pored lateral line scales (78 vs. 63-67), scales below lateral line (9 vs. 6-6.5), predorsal scales (27 vs. 22-26) and vertebrae (74 vs. 65-68). Therefore, to compare with among eleven Albula species by morphological and molecular analysis, Albula sp. 1 was distinguished among those of Albula species by two analysis but further more specimens are needed. Albula sp. 2 was distinguished among those of Albula species by morphological analysis but molecular analysis are difficult, so further more specimens and molecular analysis are needed.