Published November 5, 2020 | Version v1
Taxonomic treatment Open

Kuronezumia Iwamoto 1974

  • 1. Department of Marine Biology, School of Marine Science and Technology, Tokai University, 3 - 20 - 1 Orido, Shimizu, Shizuoka 424 - 8610, Japan ® naonakayama @ tsc. u-tokai. ac. jp or ®

Description

Genus Kuronezumia Iwamoto, 1974

[Japanese name: Suruga-nezumidara-zoku]

Kuronezumia Iwamoto, 1974:509 [type species: Nezumia (Kuronezumia) bubonis Iwamoto, 1974, by original designation].

Diagnosis. Anus separated from anal-fin origin, closer to pelvic-fin bases; periproct teardrop-shaped, moderately developed. Small dermal window of light organ between pelvic-fin bases. Infraorbital ridge not connected with preopercular ridge, separated by distinct gap. Second spinous ray of first dorsal fin finely serrated along its leading edge. Pelvic fin inserted below or anterior to pectoral-fin base. Mouth moderately large, usually subterminal. Chin barbel well developed. Teeth small, in broad bands in both jaws; premaxillary band ending anterior to posterior edge of maxillary process. Tip and lateral angles of snout lacking prominent scutes in most species. Suborbital region almost vertical, without coarsely modified scales. Head fully scaled, except for narrow naked area above upper lip. Body scales not deciduous, closely adhered to body surfaces; scale spinules needle-like, densely scattered over exposed portion or tightly packed subparallel to convergent rows; buttresses of spinules rudimentary; reticulate structure developed on posterior parts of unexposed portion. Grooved lateral line present. Cephalic sensory pores present or absent. Branchiostegal rays 7. Body dark to swarthy, lacking silvery reflection when fresh. [Modified from Sazonov & Iwamoto(1992) and Iwamoto & Graham (2001).]

Remarks. Kuronezumia was originally established as a subgenus of Nezumia Jordan in Jordan & Starks, 1904, but Sazonov & Iwamoto (1992) elevated this taxon to full generic rank. Shcherbachev et al. (1992) provided a synopsis for all the then-known species (seven species), viz., K. bubonis Iwamoto, 1974 (type species); K. dara (Gilbert & Hubbs, 1916); K. leonis (Barnard, 1925); K. macronema (Smith & Radcliffe in Radcliffe, 1912); K. paepkei Shcherbachev, Sazonov & Iwamoto, 1992; K. pallida Sazonov & Iwamoto, 1992; and Kuronezumia sp. [this undescribed species was initially recognized by Iwamoto (1974), but still remains to be described]. Two species are distributed in Japanese waters, one of which is new to science [different from the one reported by Iwamoto (1974)] and is described below.

Key to species of Kuronezumia from Japan and adjacent waters

1a Pelvic-fin rays 11–12; posterior half of mandibular rami scaled; branchiostegal membranes naked; no open pores along cephalic sensory canals; oral cavity blackish............... .................................................................................... K. dara

1b Pelvic-fin rays 15; mandibular rami almost entirely naked except for posterior margins; scaly patches present on lower portions of branchiostegal rays; cephalic sensory pores present; oral cavity pale .............................. K. endoi sp. nov.

Notes

Published as part of Nakayama, Naohide, 2020, Grenadiers (Teleostei: Gadiformes: Macrouridae) of Japan and adjacent waters, a taxonomic monograph, pp. 1-383 in Megataxa 3 (1) on pages 227-228, DOI: 10.11646/megataxa.3.1.1, http://zenodo.org/record/6422776

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Linked records

Additional details

Biodiversity

Family
Macrouridae
Genus
Kuronezumia
Kingdom
Animalia
Order
Gadiformes
Phylum
Chordata
Scientific name authorship
Iwamoto
Taxon rank
genus
Taxonomic concept label
Kuronezumia Iwamoto, 1974 sec. Nakayama, 2020

References

  • Sazonov, Y. I. & Iwamoto, T. (1992) Grenadiers (Pisces, Gadiformes) of the Nazca and Sala y Gomez Ridges, southeastern Pacific. Proceedings of the California Academy of Sciences, 48, 27 - 95.
  • Iwamoto, T. & Graham, K. J. (2001) Grenadiers (families Bathygadidae and Macrouridae, Gadiformes, Pisces) of New South Wales, Australia. Proceedings of the California Academy of Sciences, 52, 407 - 509.
  • Jordan, D. S. & Starks, E. C. (1904) List of fishes dredged by the steamer Albatross off the coast of Japan in the summer of 1900, with descriptions of new species and a review of the Japanese Macrouridae. Bulletin of the U. S. Fish Commission, 22, 577 - 630, pls. 1 - 8.
  • Shcherbachev, Y. N., Sazonov, Y. I. & Iwamoto, T. (1992) Synopsis of the grenadier genus Kuronezumia (Pisces: Gadiformes: Macrouridae), with description of a new species. Proceedings of the California Academy of Sciences, 48, 97 - 108.
  • Gilbert, C. H. & Hubbs, C. L. (1916) Report on the Japanese macrourid fishes collected by the United States fisheries steamer " Albatross " in 1906, with a synopsis of the genera. Proceedings of the United States National Museum, 51, 135 - 214, pls. 8 - 11. http: // dx. doi. org / 10.5479 / si. 00963801.51 - 2149.135
  • Barnard, K. H. (1925) Descriptions of new species of marine fishes from S. Africa. Annals and Magazine of Natural History, Series 9, 15, 498 - 504. http: // dx. doi. org / 10.1080 / 00222932508633240
  • Radcliffe, L. (1912) Description of a new family, two new genera, and twenty-nine new species of anacanthine fishes from the Philippine Islands and contiguous waters. Proceedings of the United States National Museum, 43, 105 - 140, pls. 22 - 31. http: // dx. doi. org / 10.5479 / si. 00963801.43 - 1924.105