Iwatsuki Yukio, Newman Stephen J, Tanaka Fumiya, Russell Barry C
Department of Marine Biology & Environmental Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai-nishi, Miyazaki City, Miyazaki 889-2192, Japan..
Zootaxa. 2018 Mar 29;4402(3):467-486. doi: 10.11646/zootaxa.4402.3.3.
Psammoperca datnioides Richardson 1848, long considered a synonym of P. waigiensis (Cuvier in Cuvier Valenciennes 1828), is redescribed as a valid species of Psammoperca Richardson 1848. The species is likely to be endemic to Australia, where it was formerly considered to be P. waigiensis, but differs from P. waigiensis in having the following characters: more slender body (mean depth 28.9% of SL vs. mean depth 36.7% of SL in P. waigiensis), pored lateral-line scales 49-54 (vs. 46-48 in P. waigiensis), scale rows above and below lateral line 6½ / 10½-11½ (vs 4½ / 9½-10½ in P. waigiensis), and vertical at hind margin of maxilla posterior/behind center of eye (vs. vertical at hind margin of maxilla anterior to/in front of hind margin of eye in P. waigiensis). Live specimens of Psammoperca datnioides have a uniformly dense black or brownish body, with this dark colour on body scales and pored lateral-line scales persisting even in preserved specimens. Live specimens of Psammoperca waigiensis have a brownish body, often golden in colour, and pored lateral-line scales that are yellow-edged. The COI sequence (cytochrome c oxidase subunit I, 612 bp) of P. datnioides also is distinct from P. waigiensis, and the related and poorly known Hypopterus macropterus (Günther 1859). The latter species is redescribed and diagnosed with eight indistinct dark bands on the head and body, and dorsal-fin rays VII-I, 14-15 (vs. no dark bands and dorsal-fin rays VII-I, 12-13 in Psammoperca). Nominal species in the genus Psammoperca are discussed and Cnidon chinensis Müller Troschel 1849 (type locality: Manila, Philippines) is included as a junior synonym of P. waigiensis. Psammoperca vaigiensis Boulenger 1895 is an unneeded emendation and thus an invalid name. Psammoperca macroptera Günther 1859 is retained in the monotypic genus Hypopterus Gill 1861 in the family Latidae, although the species has been overlooked in most studies on the Latidae and/or Centropomidae. A key to the Latidae is provided.
1848年的达氏似弱棘鱼（Psammoperca datnioides Richardson）长期以来一直被视为瓦氏似弱棘鱼（P. waigiensis，由居维叶于1828年在居维叶和瓦朗谢讷共同发表的著作中描述）的同物异名，现被重新描述为1848年的似弱棘鱼属（Psammoperca Richardson）的一个有效物种。该物种可能是澳大利亚特有的，此前在澳大利亚它被认为是瓦氏似弱棘鱼，但与瓦氏似弱棘鱼不同，具有以下特征：身体更细长（平均体深为标准体长的28.9%，而瓦氏似弱棘鱼为标准体长的36.7%），有孔侧线鳞49 - 54枚（瓦氏似弱棘鱼为46 - 48枚），侧线上下的鳞列分别为6½ / 10½ - 11½行（瓦氏似弱棘鱼为4½ / 9½ - 10½行），上颌后缘垂直于眼后中心/眼后（瓦氏似弱棘鱼的上颌后缘垂直于眼后缘之前/眼前）。达氏似弱棘鱼的活体标本身体颜色均匀为深黑色或褐色，即使在保存标本中，身体鳞片和有孔侧线鳞上的这种深色也依然存在。瓦氏似弱棘鱼的活体标本身体呈褐色，通常为金黄色，并带有黄色边缘的有孔侧线鳞。达氏似弱棘鱼的细胞色素c氧化酶亚基I（COI）序列（612 bp）也与瓦氏似弱棘鱼以及相关且鲜为人知的大鳍下锯脂鲤（Hypopterus macropterus， Günther 1859）不同。后一物种被重新描述并诊断为头部和身体有八条不明显的深色带，背鳍鳍条为VII - I，14 - 15（似弱棘鱼没有深色带，背鳍鳍条为VII - I，12 - 13）。对似弱棘鱼属中的名义物种进行了讨论，并将中华锯脂鲤（Cnidon chinensis Müller Troschel 1849，模式产地：菲律宾马尼拉）列为瓦氏似弱棘鱼的次异名。1895年的瓦氏似弱棘鱼（Psammoperca vaigiensis Boulenger）是一个不必要的修订名，因此是一个无效名称。1859年的大鳍似弱棘鱼（Psammoperca macroptera Günther）保留在1861年吉尔（Gill）建立的单型属下锯脂鲤属（Hypopterus）中，属于锯盖鱼科（Latidae），尽管该物种在大多数关于锯盖鱼科和/或尖塘鳢科的研究中被忽视。提供了锯盖鱼科的检索表。
