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Uncovering overlooked diversity using molecular phylogenetic approach: a case of Japanese sphaeriid clams (Bivalvia: Sphaeriidae)
Saito, T.; Fujimoto, K.; Uchida, S.; Yamazaki, D.; Hirano, T.; Sano, I.; Ye, B.; Kagawa, O.; Shariar, M.S.; Do, V.T.; Morii, Y.; Prozorova, L.; Chiba, S. (2022). Uncovering overlooked diversity using molecular phylogenetic approach: a case of Japanese sphaeriid clams (Bivalvia: Sphaeriidae). Mol. Phylogenet. Evol. 173: 107508. https://dx.doi.org/10.1016/j.ympev.2022.107508
In: Molecular Phylogenetics and Evolution. Elsevier: Orlando, FL. ISSN 1055-7903; e-ISSN 1095-9513
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Mollusca [WoRMS]
    Zoet water
Author keywords
    Biodiversity hotspot, Cryptic biodiversity, Dispersal, Freshwater, Mollusca, Species delimitation
Auteurs  Top 
  • Saito, T.
  • Fujimoto, K.
  • Uchida, S.
  • Yamazaki, D.
  • Hirano, T.
  • Sano, I.
  • Ye, B.
  • Kagawa, O.
  • Shariar, M.S.
  • Do, V.T.
  • Morii, Y.
  • Prozorova, L.
  • Chiba, S.
Abstract
    Revealing the species and lineage diversity of a taxon is important for many biological studies of wildlife. In recent decades, DNA-based approaches have been widely utilised to elucidate the diversity of taxa, especially those that are difficult to distinguish based on morphological traits. This study focused on freshwater clams (Sphaeriidae) in Japan, a biodiversity hotspot of freshwater molluscs. Molecular phylogenetic approaches, including divergence time estimation, species delimitation, rarefaction, and biogeographic area estimation, were used to reveal the nature of the species diversity and its formation process, which are largely unknown. Our delimitation and rarefaction analyses suggest that Japanese sphaeriid clams consist of at least 18 delimitated lineages. This lineage diversity is relatively high compared to other Japanese freshwater molluscs, and in addition, the majority of the Japanese lineage appears to have high endemicity despite the possibility of long-distance dispersal in sphaeriid clams. Our biogeographical analyses suggest that this diversity may be due to the combination of colonisation, during the period when Japan was connected to the continent, and the relatively recent dispersal. Our results highlight the overlooked biodiversity of Japan and provide a basis for further Japanese sphaeriid research, including conservation perspectives.
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