A New Record of Juvenile Chromis mirationis (Perciformes: Pomacentridae) from Korea, Revealed by Molecular Analysis, with a Comparison to Juvenile Chromis notata

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  • ABSTRACT

    A single juvenile pomacentrid specimen (5.9 mm standard length) was collected from the Korea Strait in October 2010. The specimen is characterized by punctate-stellate melanophores scattered on the operculum and dorso-ventral region in front of the caudal peduncle, the lack of melanophores on the posterior end of the anal fin base, the presence of 14 spines and 14 soft rays on the dorsal fin, and the presence of 2 spines and 12 soft rays on the anal fin. A molecular analysis based on mitochondrial DNA 16S rRNA sequences showed that this specimen is closely related to adult Chromis mirationis (d = 0.002), but that it differs from Chromis notata (d = 0.017). Juvenile C. mirationis differ from juvenile C. notata in having no melanophores on the posterior end of the anal fin base. We propose a new Korean name, “tti-ja-ri-dom” for C. mirationis.


  • KEYWORD

    Chromis mirationis , Chromis notata , Juvenile , New record , MtDNA 16S rRNA , Korea

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  • [Fig. 1.] Photo (A) and illustration (B) of Chromis mirationis, NIBR-P22498, 5.9 mm standard length (SL); photo (C) and illustration (D) of Chromis notata, PKUI 96, 5.1 mm SL. Scale Bars = 2 mm.
    Photo (A) and illustration (B) of Chromis mirationis, NIBR-P22498, 5.9 mm standard length (SL); photo (C) and illustration (D) of Chromis notata, PKUI 96, 5.1 mm SL. Scale Bars = 2 mm.
  • [Fig. 2.] Comparative specimens of Chromis mirationis examined. (A) 24.7 mm standard length (SL), KPM-NI 23617, (B) 52.8 mm SL, KPM-NI 30479, and (C) 100.1 mm SL, KPM-NI 18916.
    Comparative specimens of Chromis mirationis examined. (A) 24.7 mm standard length (SL), KPM-NI 23617, (B) 52.8 mm SL, KPM-NI 30479, and (C) 100.1 mm SL, KPM-NI 18916.
  • [Table 1.] Comparison of meristic characters between Chromis mirationis and four species of genus Chromis
    Comparison of meristic characters between Chromis mirationis and four species of genus Chromis
  • [Fig. 3.] Neighbor-joining tree constructed by the mitochondrial DNA 16S rRNA sequences for juvenile Pomacentridae sp. and five Chromis species, with one outgroup (Thalassoma lunare). Numbers at branches indicate bootstrap probabilities in 10,000 bootstrap replications. Bar indicates genetic distance of 0.02. Parenthesis and superscripts indicate the NCBI registratioin number and voucher number, respectively.
    Neighbor-joining tree constructed by the mitochondrial DNA 16S rRNA sequences for juvenile Pomacentridae sp. and five Chromis species, with one outgroup (Thalassoma lunare). Numbers at branches indicate bootstrap probabilities in 10,000 bootstrap replications. Bar indicates genetic distance of 0.02. Parenthesis and superscripts indicate the NCBI registratioin number and voucher number, respectively.