Abstract
Osteological and myological studies on the caudal complex of flying fishes (Exocoetidae) plusOxyporhamphus (of Hemiramphidae) revealed the following shared derived conditions: 1) neural spines of preural vertebrae broader than haemal spines; 2) spur present on posterior margin of preural vertebra 2;3) upper hypural plates steeply angled; 4) lower hypural plate extending strongly posteriorly; 5) lower hypural plate deeply surrounded by caudal fin rays; 6) flexor ventralis well developed, arising from neural spines; 7) flexor ventralis externus well developed; 8) adductor dorsalis well developed.Oxyporhamphus and exocoetids also share a lower jaw of adults not elongate and the premaxilla with a straight anterior margin. Therefore,Oxyporhamphus is transferred to the Exocoetidae, with which it shares a total of 10 derived conditions.
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Dasilao, J.C., Sasaki, K. & Okamura, O. The hemiramphid,Oxyporhamphus, is a flyingfish (exocoetidae). Ichthyological Research 44, 101–107 (1997). https://doi.org/10.1007/BF02678688
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DOI: https://doi.org/10.1007/BF02678688