Neotrygon yakkoei, a new bluespotted maskray (Dasyatidae) from Japan

IF 0.6 4区生物学 Q4 FISHERIES

Ichthyological Research Pub Date : 2024-08-01 DOI:10.1007/s10228-024-00989-7

Eishiro Hata, Hiroyuki Motomura

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Abstract

Neotrygon yakkoei (Dasyatidae), a new species of bluespotted maskray from Japan, previously confused with Neotrygon kuhlii (Müller and Henle 1841) or Neotrygon orientalis Last, White and Séret 2016, is described on the basis of 35 specimens [146.4–425.2 mm disc width (DW)] from Japan. The new species is characterized by the following characteristics: greenish brown body in fresh with a single dark mask-like marking between eyes (often indistinct); fewer spots (mean 20.4 spots); small pale blue spots [its diameter 1.2–3.4% (mean 2.6%) of DW] surrounded by dark brown outer rings when fresh; and longer head length 35.9–43.4% (mean 39.1%) of DW. Molecular analysis based on 576 bp of partial COI mitochondrial gene also supports that N. yakkoei is a distinct species from all other congeners, except for Neotrygon vali Borsa 2017, which lacked genetic data. The new species is currently known only from Japan: Hokkaido (Japan Sea and Pacific sides), Wakasa Bay (Japan Sea), the Izu and Ogasawara islands, the Pacific coast of Japan from Sagami Bay to southern Kyushu, and the Osumi, Amami, Okinawa, and Yaeyama islands.

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Neotrygon yakkoei，一种来自日本的新蓝斑面具鱼（Dasyatidae）

Neotrygon yakkoei (Dasyatidae)是来自日本的蓝斑面具鱼的一个新种，以前曾与 Neotrygon kuhlii (Müller and Henle 1841) 或 Neotrygon orientalis Last, White and Séret 2016 混淆，本报告基于来自日本的 35 个标本 [146.4-425.2 mm disc width (DW)] 进行了描述。该新品种具有以下特征：新鲜时身体呈绿褐色，两眼之间有一个深色面具状斑纹（通常模糊不清）；斑点较少（平均 20.4 个）；新鲜时有淡蓝色小斑点[其直径为盘宽的 1.2-3.4%（平均 2.6%）]，周围有深褐色外圈；头部较长，为盘宽的 35.9-43.4%（平均 39.1%）。基于部分 COI 线粒体基因 576 bp 的分子分析也支持 N. yakkoei 是一个不同于所有其他同系物的物种，但 Neotrygon vali Borsa 2017 除外，因为它缺乏遗传数据。该新物种目前仅产于日本：北海道（日本海和太平洋沿岸）、若狭湾（日本海）、伊豆和小笠原群岛、相模湾至九州南部的日本太平洋沿岸，以及大隅、奄美、冲绳和八重山群岛。

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来源期刊

Ichthyological Research 生物-动物学

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

3 months

期刊介绍： Ichthyological Research is an official journal of the Ichthyological Society of Japan and is published quarterly in January, April, July, and November. Ichthyological Research primarily publishes research papers on original work, either descriptive or experimental, that advances the understanding of the diversity of fishes. Ichthyological Research strives to cover all aspects of fish biology, including taxonomy, systematics, evolution, biogeography, ecology, ethology, genetics, morphology, and physiology.