Namiotko Tadeusz, Danielopol Dan L, Belmecheri Soumaya, Gross Martin, Von Grafenstein Ulrich
Laboratory of Limnozoology, Department of Genetics, University of Gdańsk, Kładki 24, 80-822 Gdańsk, Poland.
Commission for the Stratigraphical and Palaeontological Research of Austria, Austrian Academy of Sciences, c/o Institute for Earth Sciences (Geology and Palaeontology), Karl-Franzens University, Heinrichstraße 26, A-8010 Graz, Austria.
Int Rev Hydrobiol. 2012 Aug 16;97(4):356-374. doi: 10.1002/iroh.201211496.
Klie, one of few non-marine species of the family Leptocytheridae (Ostracoda), is redescribed from specimens recently collected from the long-lived Lake Ohrid on the Albanian-Macedonian border. Detailed morphologies of valves and limbs of this species were compared with those of other Ohrid-Prespa leptocytherids, of some recent marine representatives of the genera Sars and Ruggieri from the Mediterranean, Irish and Baltic seas as well as with that of fossil non-marine species from the Miocene palaeo-Lake Pannon belonging to the genera Devoto and Stancheva. Comparison with other species of Leptocytheridae inhabiting fresh to brackish waters of the Black-Azov, Caspian and Aral seas were also carried out using descriptions provided in the literature. Based on the comparative morphological studies it is shown that and other Ohrid leptocytherids have a number of characters distinguishing them from other members of the genus but demonstrating a relationship with species of the genus . The most reliable of these characters are: a) anterior valve vestibulum from where mostly uni-ramified pore canals start, b) the entomodont hinge type with a strong anterior anti-slip tooth, a smooth posterior anti-slip bar on the left valve, and c) the hemipenis with underdeveloped lateral lobe and reduced clasping organ. From this strong evidence, the Ohrid leptocytherid species are allocated to the genus . Finally, a biogeographic scenario on the origin of the Ohrid leptocytherids is proposed which matches the "Lake Pannon derivate hypothesis". Close relationship of the Ohrid species with the non-marine leptocytherid taxa from the Neogene lakes of Central and Eastern Europe and with extant taxa from the Black and Caspian seas may indicate that the Ohrid derived from Lake Pannon species which were able to colonise lakes in Southern Europe through a stepping-stone process and subsequently to adapt to freshwater environment.
Klie是薄壳介科（介形纲）少数非海洋物种之一，根据最近从阿尔巴尼亚-马其顿边境的长寿奥赫里德湖采集的标本对其进行了重新描述。将该物种的瓣膜和附肢的详细形态与其他奥赫里德-普雷斯帕薄壳介、地中海、爱尔兰海和波罗的海的一些最近的Sars属和Ruggieri属海洋代表以及中新世古潘诺湖属于Devoto属和Stancheva属的化石非海洋物种的形态进行了比较。还利用文献中提供的描述，将其与栖息在黑海-亚速海、里海和咸海的淡水至微咸水的薄壳介科其他物种进行了比较。基于比较形态学研究表明，奥赫里德薄壳介和其他奥赫里德薄壳介具有一些将它们与该属其他成员区分开来的特征，但显示出与某属物种的关系。这些特征中最可靠的是：a）前瓣膜前庭，大多数单分支孔道从此处开始；b）具强前防滑齿的昆虫齿铰链类型，左瓣膜上有光滑的后防滑条；c）半阴茎具不发达的侧叶和退化的抱握器官。基于这一有力证据，奥赫里德薄壳介物种被归入某属。最后，提出了一个关于奥赫里德薄壳介起源的生物地理情景，该情景与“潘诺湖衍生假说”相匹配。奥赫里德某物种与中欧和东欧新近纪湖泊的非海洋薄壳介分类群以及黑海和里海的现存分类群的密切关系可能表明，奥赫里德某起源于潘诺湖物种，这些物种能够通过踏脚石过程在南欧的湖泊中定殖，随后适应淡水环境。
