Ichthyological Research

, Volume 59, Issue 2, pp 189–192 | Cite as

Ambiguities in the identification of batoid lateral line systems clarified by innervation

  • Yoshikatsu Abe
  • Ryu Asaoka
  • Masanori Nakae
  • Kunio SasakiEmail author
Short Report


Innervation of the lateral line canal system in seven batoid species (representing seven families in three orders) provided a reliable basis for the identification of each canal element. Previous topographic definitions of the canal elements have failed to recognize homologies within batoids for the scapular and hyomandibular canals. The former is innervated by the posterior lateral line nerve and the latter is innervated by an external mandibular branch of the anterior lateral line nerve. This indicates that the scapular canal is represented only by the scapular loop in Myliobatoidei.


Ray Lateral line system Nerve Homology 



We thank the Fishery Cooperation of Saga (Kochi Prefecture) and G. Hagiwara, M. Matsunuma, and M. Meguro (Kagoshima University) for their assistance in sampling. G. Hardy (Ngunguru, New Zealand) read the manuscript and offered helpful comments.


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Copyright information

© The Ichthyological Society of Japan 2011

Authors and Affiliations

  • Yoshikatsu Abe
    • 1
  • Ryu Asaoka
    • 1
  • Masanori Nakae
    • 2
  • Kunio Sasaki
    • 1
    Email author
  1. 1.Laboratory of Marine Biology, Faculty of ScienceKochi UniversityKochiJapan
  2. 2.Department of ZoologyNational Museum of Nature and ScienceTsukubaJapan

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