Two geographically non-overlapping species are currently described within the sparid genus Spondyliosoma: Spondyliosoma cantharus (Black Seabream) occurring across Mediterranean and eastern Atlantic waters from NW Europe to Angola; and S. emarginatum (Steentjie) considered endemic to southern Africa. To address prominent knowledge gaps this study investigated range-wide phylogeographic structure across both species. Mitochondrial DNA sequences revealed deep phylogeographic structuring with 4 regionally partitioned reciprocally monophyletic clades; a Mediterranean clade and three more closely related Atlantic clades (NE Atlantic, Angolan, and South Africa (corresponding to S. emarginatum)). Divergence and distribution of the lineages reflects survival in, and expansion from, disjunct glacial refuge areas. Cytonuclear differentiation of S. emarginatum supports its validity as a distinct species endemic to South African waters. However, the results also indicate that S. cantharus may be a cryptic species complex wherein the various regional lineages represent established/incipient species. A robust multi-locus genetic assessment combining morphological data and detailing interactions among lineages is needed to determine the full diversity within Spondyliosoma and the most adequate biological and taxonomic status. This article is protected by copyright. All rights reserved.

中文翻译：

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深部系统地理学结构可能表明 Sparid 属 Spondyliosoma 内的隐秘物种

两种在地理上不重叠的物种目前被描述在鲭属 Spondyliosoma 中： Spondyliosoma cantharus（黑鲷）分布于地中海和东大西洋水域，从欧洲西北部到安哥拉；和 S. emarginatum (Steentjie) 被认为是南部非洲的特有种。为了解决突出的知识差距，这项研究调查了两个物种的范围广泛的系统地理学结构。线粒体 DNA 序列揭示了具有 4 个区域划分的相互单系进化枝的深层系统地理学结构；一个地中海进化枝和三个更密切相关的大西洋进化枝（东北大西洋、安哥拉和南非（对应于 S. emarginatum））。谱系的分化和分布反映了在分离的冰川避难区中的生存和扩张。S.的细胞核分化。emarginatum 支持其作为南非水域特有的独特物种的有效性。然而，结果还表明 S. cantharus 可能是一个隐秘的物种复合体，其中各种区域谱系代表已建立/初期的物种。需要结合形态学数据和谱系之间详细相互作用的强大的多位点遗传评估来确定脊椎体内的完整多样性以及最充分的生物学和分类学状态。本文受版权保护。版权所有。需要结合形态学数据和谱系之间详细相互作用的强大的多位点遗传评估来确定脊椎体内的完整多样性以及最充分的生物学和分类学状态。本文受版权保护。版权所有。需要结合形态学数据和谱系之间详细相互作用的强大的多位点遗传评估来确定脊椎体内的完整多样性以及最充分的生物学和分类学状态。本文受版权保护。版权所有。