Studies on Lethrinitrema Lim & Justine, 2011 (Monogenea: Dactylogyridae), with the description of two new species, a key to the genus and a phylogenetic analysis based on rDNA sequences
Studies on Lethrinitrema Lim & Justine, 2011 (Monogenea: Dactylogyridae), with the description of two new species, a key to the genus and a phylogenetic analysis based on rDNA sequences
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DOI：
10.1007/s11230-014-9482-7
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发表时间：
2014-05
影响因子：
1.3
通讯作者：
Yuan-lin Sun;Min Li;Ting-bao Yang
中科院分区：
文献类型：
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作者：
Yuan-lin Sun;Min Li;Ting-bao Yang
描述了采自中国南海雾状裸颊鱼Lethrinus nebulosus（Forsskål）鳃部的6种LethrinitremaLim & Justine，2011，包括2个新分类群。与该属其它成员的不同之处在于，其交配器官具有一个短的、远端下弯的管，一个杯状的基部和一个薄的附属片，附属片从管的远端发出，连接处不明显。sp.的交配器官为C形管，杯状基部，无附属片，与其同类相区别。comb.和华南裸缘木（Lethrinitrema austrosinense（Li & Chen，2005）n.梳子，先前包括在Haliotrema Johnston & Tiegs，1922中的，被转移到Lethrinitrema，并重新描述了更多的细节，包括在性腺后面联合并在后面继续作为两个憩室的肠盲囊，以及在进入腹侧锚每一侧的浅表侧沟之前分叉的每个触囊的细长管状远端。本文还描述了两种未鉴定的Lethrinitrema的硬化部分。1不同于其他Lethrinitremaspp。雄性的交配器官由一个短的锥形管和一个坚固的杯状基部组成，缺少附属部分。2与其同类的不同之处在于具有一个由短而细的管组成的交配器官，没有附属片，精致的腹杆和背杆，以及发育不良的锚外根。本文报道了27种指环虫的部分28 S rDNA（D1-D2结构域）和完整18 S rDNA序列，其中包括五种裸缘指状虫Lethrinitrema fleti（Young，1968）Lim & Justine，2011，L. nebelosum，L. Zhanjiangense，L.大安全管1被用来评估的单系性的莱斯菌氮，这是支持高自助值。
Six species ofLethrinitremaLim & Justine, 2011, including two new taxa, are described from the gills ofLethrinus nebulosus(Forsskål) from the South China Sea.Lethrinitrema nebulosumn. sp. differs from all other members of the genus in possessing a copulatory organ with a short, distally recurved tube, a cup-shaped base and a thin accessory piece, arising from distal end of tube, junction inconspicuous.Lethrinitremazhanjiangensen. sp. can be distinguished from its congeners by possessing a copulatory organ with a C-shaped tube, a cup-shaped base and without accessory piece.Lethrinitrema grossecurvitubum(Li & Chen, 2005) n. comb. andLethrinitrema austrosinense(Li & Chen, 2005) n. comb., previously included inHaliotremaJohnston & Tiegs, 1922, are transferred toLethrinitremaand redescribed with additional details, including the intestinal caeca that unite posterior to gonads and continue posteriorly as two diverticula, and the elongate tubular distal end of each haptoral reservoir bifurcating prior to entering a superficial lateral groove on each side of the ventral anchor. The sclerotised parts of two unidentified species ofLethrinitremaare also described.Lethrinitremasp. 1 differs from the otherLethrinitremaspp. in possessing a male copulatory organ consisting of a short tapered tube with a robust cup-shaped base and in lacking accessory piece.Lethrinitremasp. 2 differs from its congeners in possessing a copulatory organ comprised of a short slender tube and without accessory piece, delicate ventral and dorsal bars, and poorly developed outer roots of the anchors. Sequences of partial 28S rDNA (domains D1–D2) and complete 18S rDNA for 27 dactylogyrids including five species ofLethrinitrema, i.e.Lethrinitrema fleti(Young, 1968) Lim & Justine, 2011,L. nebulosum,L. zhanjiangense,L. grossecurvitubumandLethrinitremasp. 1 were used to assess the monophyly ofLethrinitremawhich was supported by high bootstrap values.