Marked differentiation in a new species of dwarf stonebasher, Pollimyrus cuandoensis sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers

Marked differentiation in a new species of dwarf stonebasher, Pollimyrus cuandoensis sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers
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矮石鳖的新种Pollimyrus cuandoensis sp nov(Mormyridae:Teleostei)与奥卡万戈河和赞比西河的两个兄弟物种的接触带发生显着分化

DOI:
10.1080/00222933.2013.807950
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发表时间:
2014
影响因子:
0.8
通讯作者:
F. H.
F. H.
中科院分区:
生物学4区
文献类型:
--
作者:
Kramer;Van der Bank;F. H.

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我们研究了宽多河下游Pollimyrus的系统地位,该河流两侧是奥卡万戈河,居住着Pollimyrus castelnaui(Boulenger,1911),赞比西河,居住着Pollimyrus marianneKramer等人,2003.在形态学和电器官放电(EODs),Kwando表型证明分化良好,从bothP。卡斯泰尔诺湾玛丽安cytb基因的序列分析证实,这三种或三种形成了一个单系分支,P. Castelnauissister到其他两个物种。ISSR-PCR的基因组指纹图谱证实了Kwando型的分化,我们认为这是一个不同的物种,P. cuandoensissp。十一月,来自它的姐妹物种玛丽安在不同的样品中,发现了大量的EOD和形态变异。宽登种nov.从四个不同的位置上较低的宽多河,可能是由于杂交渐渗。这似乎是一个理想的系统来测试理论的parapatric物种形成。http://www.zoobank.org/urn:lsid:zoobank.org:pub:FB644B21-04F6-44F8-AEB6-8DC09268C17C
We studied the systematic status of a form ofPollimyrusof the lower Kwando River that is flanked by the Okavango River, inhabited byPollimyrus castelnaui(Boulenger, 1911), and the Zambezi River, inhabited byPollimyrus marianneKramer et al., 2003. In morphology and electric organ discharges (EODs), the Kwando phenotype proved well differentiated from bothP. castelnauiandP. marianne. Sequence analysis of the cytbgene confirmed that the three forms or species form a monophyletic clade, withP. castelnauisister to the other two species. Genomic fingerprinting with ISSR-PCR confirmed differentiation of the Kwando form, that we recognize as a different species,P. cuandoensissp. nov., from its sister species,P. marianne. A considerable amount of EOD and morphological variation was revealed among samples ofP. cuandoensissp. nov. from four different locations on the lower Kwando River, possibly due to hybrid introgression. This seems an ideal system for testing theories of parapatric speciation. http://www.zoobank.org/urn:lsid:zoobank.org:pub:FB644B21-04F6-44F8-AEB6-8DC09268C17C
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