On the taxonomy of three sympatric sibling species of the Brachionus plicatilis (Rotifera) complex from Spain, with the description of B-ibericus n. sp.
On the taxonomy of three sympatric sibling species of the Brachionus plicatilis (Rotifera) complex from Spain, with the description of B-ibericus n. sp.
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DOI：
10.1093/plankt/23.12.1311
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发表时间：
2001-12-01
影响因子：
2.1
通讯作者：
Serra, M
中科院分区：
文献类型：
--
作者：
Ciros-Pérez, J;Gómez, A;Serra, M
在过去的十年中，证据的积累导致褶皱臂尾轮虫复合体（轮虫）分裂成两个形态上可识别的物种：B。plicatilisMuller和B.圆型Tschugunoff，以前称为L型和S型B。褶皱（s.l.），分别然而，最近的群体遗传学和分子研究表明，这些类群中的每一个都涉及神秘的物种复合体。特别是在西班牙地中海沿岸的托雷布兰卡沼泽，这轮虫复杂的三个遗传上不同的群体已被证明是共同出现的。遗传标记、生态偏好、混合反应、交配行为的差异，以及它们之间没有基因流动的证据，都导致了必须将它们视为三个不同生物物种的结论。在这项研究中，我们提出了一个详细的比较分析，使用光学和扫描电子显微镜的实验室菌株，使这三个物种的形态特征。精细形态学和形态测量学揭示了足够恒定的分类特征，以识别三种定义明确的形态，这些形态总是与所识别的相应生物物种相对应。由于没有B两种类型的材料。皱襞和B.圆型是可用的，我们设计了我们的西班牙克隆作为新模式，这将允许进一步的比较工作。此外，B.伊比利亚人; sp.描述。这项研究为全面描述这一经济上重要的物种复合体中所含的生物多样性迈出了第一步。
The accumulation of evidence during the last decade led to the splitting of the Brachionus plicatilis complex (Rotifera) into two morphologically recognizable species: B. plicatilis Muller and B. rotundiformis Tschugunoff, previously referred to as L- and S-type B. plicatilis (s.l.), respectively. However, recent population genetics and molecular studies have revealed that each of these taxa concern cryptic species complexes. In particular, in Torreblanca Marsh, a wetland on the Mediterranean coast of Spain, three genetically distinct groups in this rotifer complex have been shown to co-occur. Differences in genetic markers, ecological preferences, mixis responses, mating behaviour and no evidence of gene flow between them have led to the conclusion that they must be considered as three different biological species. In this study we present a detailed comparative analysis using light and scanning electron microscopy of laboratory strains enabling a morphological characterization of the three species. Fine morphology and morphometry revealed taxonomic characters constant enough to recognize three well-defined morphologies, which always correspond with the respective biological species identified. Since no type material of both B. plicatilis and B. rotundiformis is available, we designed our Spanish clones as neotypes, which would allow further comparative work. Furthermore, B. ibericus n. sp. is described. This study sets the first step for a complete characterization of the biological diversity contained within this economically important species complex.