Zenopsis filamentosa (Zeidae), a new mirror dory from the western Pacific Ocean, with redescription of Zenopsis nebulosa

Abstract

A new mirror dory, Zenopsis filamentosa, is described from specimens collected off the Pacific coast of southern Japan (Mie and Tosa Bay), the Kyushu-Palau Ridge, Fiji, and Tonga. Within Zenopsis, the new species is most similar to Zenopsis nebulosa, widely distributed in the Pacific Ocean, in having nine dorsal-fin spines and similar buckler numbers along the anal-fin base. However, it can be distinguished from the latter in having 24–27 (modally 26) dorsal-fin soft rays (vs. 25–28, modally 27 in Z. nebulosa), 24–25 (usually 25) anal-fin rays (vs. 25–27, usually 26), filamentous membranes extending from the spinous portion of the dorsal fin, of length more than twice SL (vs. moderately elongated, not exceeding the caudal-fin posterior margin when adpressed); 6–9 (modally 7) bucklers between the pelvic and anus (vs. 7–10, modally 8), no bucklers above the anal-fin spines (vs. a small buckler present), and the pelvic fin with three to five dark stripes of all sizes (vs. lacking distinct markings in specimens >ca. 100 mm SL). Sequence variations on the mitochondrial DNA COI region demonstrated the validity of each species. Zenopsis nebulosa is redescribed, on the basis of western and Central Pacific Ocean specimens.

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Acknowledgements

We greatly appreciate N. Nakayama and M. Takami (Tokai University), T. Naito and H. Endo (BSKU), and S. Yanagimoto (National Research Institute of Fisheries Science, Japan) for the collection of some specimens examined here, and also G. Shinohara and M. Nakae (NSMT), H. Imamura and T. Kawai (HUMZ), H. Motomura (KAUM), and A. Barshukin (ZIN) for access to collections, and R. Misawa (FAKU) for the provision of holotype data of Z. oblonga. We also thank M. McGrouther and S. Reader (AMS) for providing photos and X-rays of the holotype of Z. scopus, T. Yamakawa (Kochi, Japan) for providing photos of the lectotype of Z. nebulosa, and G. S. Hardy (Ngunguru, New Zealand) for his critical reading of the manuscript.

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Correspondence to Yoshiaki Kai.

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This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as 015438F9-E6E7-428B-A8DF-56315991E94D.

This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number.

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Kai, Y., Tashiro, F. Zenopsis filamentosa (Zeidae), a new mirror dory from the western Pacific Ocean, with redescription of Zenopsis nebulosa. Ichthyol Res 66, 340–352 (2019). https://doi.org/10.1007/s10228-018-00679-1

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Keywords

  • New species
  • COI
  • Zenopsis conchifer
  • Zenopsis oblonga
  • Western North Pacific