Nielsen Stuart V, Conradie Werner, Ceríaco Luis M P, Bauer Aaron M, Heinicke Matthew P, Stanley Edward L, Blackburn David C
University of Michigan-Dearborn, Dearborn, Michigan, USA University of Michigan Dearborn United States of America.
Florida Museum of Natural History, University of Florida, Gainesville, Florida, USA University of Florida Gainesville United States of America.
Zookeys. 2020 Oct 27;979:133-160. doi: 10.3897/zookeys.979.56863. eCollection 2020.
Recent molecular phylogenetic work has found that Merrem, 1820 comprises two major clades, one of which, the group, is widely distributed across southern sub-Saharan Africa. This group is notable for harboring abundant cryptic diversity. Of the four most recently described species, three are members of this group, and at least five additional lineages await formal description. Although has long been known to occur in Angola, no contemporary material has been collected until recently. The three most widespread taxa, , , and , may all occur in Angola, but accurate species assignment remains challenging given the rampant morphological similarity between these taxa, and, until recently, the lack of genetic resources. Phylogenetic, morphological, and acoustic analyses of recently collected samples from disparate localities within Angola provide evidence for an undescribed species that is sister to . The new species can be diagnosed from its sister taxon by lacking pale spots along the flanks, a pale patch above the vent, and a short, dark band below the nares (all present in ). Additionally, the male advertisement call differs from the three other that might occur in Angola in having both a longer interval between consecutive calls and a higher average dominant frequency. We here describe this lineage as a distinct species, currently only known from Angola, and discuss the presence of other taxa within Angola.
最近的分子系统发育研究发现，1820年的Merrem包含两个主要分支，其中一个分支，即该种群，广泛分布于撒哈拉以南非洲南部。这个种群以拥有丰富的隐性多样性而闻名。在最近描述的四个物种中，有三个是这个种群的成员，至少还有五个谱系有待正式描述。尽管长期以来人们都知道（该物种）在安哥拉存在，但直到最近才收集到当代样本。分布最广的三个分类单元，（具体物种名缺失）、（具体物种名缺失）和（具体物种名缺失），可能都出现在安哥拉，但鉴于这些分类单元之间形态上极为相似，且直到最近都缺乏遗传资源，准确的物种鉴定仍然具有挑战性。对最近从安哥拉不同地点采集的样本进行的系统发育、形态学和声学分析，为一种未描述的物种提供了证据，该物种是（另一物种名缺失）的姐妹物种。新物种与它的姐妹分类单元的区别在于，其侧腹没有浅色斑点，泄殖腔上方没有浅色斑块，鼻孔下方没有短的深色带（这些特征在（另一物种名缺失）中均有）。此外，雄性的求偶叫声与可能出现在安哥拉的其他三种（物种名缺失）不同，其连续叫声之间的间隔更长，平均优势频率更高。我们在此将这个谱系描述为一个独特的物种，目前仅在安哥拉被发现，并讨论了安哥拉境内其他（物种名缺失）分类单元的存在情况。
