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Phylogenetic relationships in Stephanopinae: systematics of Stephanopis and Sidymella based on morphological characters (Araneae: Thomisidae)
Organisms Diversity & Evolution ( IF 1.6 ) Pub Date : 2021-01-03 , DOI: 10.1007/s13127-020-00472-x
Miguel Machado , Renato Augusto Teixeira

A matrix of 117 morphological characters scored for 77 terminal taxa was subjected to parsimony analysis under equal and implied weighting schemes and to Bayesian inference in order to test the relationships in and between Stephanopis and Sidymella species, as well as its implications for the systematics of the subfamily Stephanopinae. A sensitivity test was performed to evaluate nodal stability. Our results indicate the polyphyletism of both genera and the topologies obtained allowed the proposition of the following taxonomic acts: The “ altifrons clade” is the only group considered as Stephanopis (stricto sensu), with species restricted to the Australian region; most species from the Neotropical region, hitherto attributed to this genus, formed the well-supported “ pentacantha clade”, while two of them, restricted to Central America, were recovered as the “ championi clade”. The latter shows significative evidences for the revalidation of Paratobias gen. rev .; the “ cambridgei clade” emerged with I. punctata nested within, having all its component species transferred to Isala . None of the Sidymella species with Australian distribution seems to be part of this genus, which occurs in fact only in the Neotropical region and is closely related to Coenypha . This latter has an increment of three species transferred from Stephanopis . Aside from the “ lucida clade”, which is considered here as Sidymella (stricto sensu), three other groups and a single species emerged apart from this genus: the “ hirsuta clade”, “ trapezia clade”, “ angularis clade” and Si. rubrosignata . Morphological evidences seem to justify the proposition of all these groups as new genera.

中文翻译:

Stephanopinae的系统发育关系:基于形态特征的Stephanopis和Sidymella的系统学(Araneae:Thomisidae)

对 77 个终端分类群的 117 个形态特征进行评分的矩阵在相等和隐含的加权方案和贝叶斯推理下进行简约分析,以测试 Stephanopis 和 Sidymella 物种之间的关系,以及其对系统学的影响亚科 Stephanopinae。进行敏感性测试以评估节点稳定性。我们的结果表明,属的多系性和获得的拓扑允许以下分类行为的命题:“altifrons clade”是唯一被认为是 Stephanopis (stricto sensu) 的群体,物种仅限于澳大利亚地区;大多数来自新热带地区的物种,迄今为止都归于该属,形成了得到充分支持的“pentacantha clade”,而其中两个仅限于中美洲,被恢复为“冠军进化枝”。后者显示了重新验证 Paratobias gen 的重要证据。转。“cambridgei clade”出现了 I. punctata 嵌套在其中,其所有组成物种都转移到了 Isala。澳大利亚分布的 Sidymella 物种似乎都不是该属的一部分,它实际上只出现在新热带地区并且与 Coenypha 密切相关。后者增加了从 Stephanopis 转移的三个物种。除了这里被认为是 Sidymella(严格意义上的)的“lucida clade”之外,除了这个属之外,还出现了其他三个组和一个物种:“hirsuta clade”、“trapezia clade”、“angularis clade”和 Si。红花。形态学证据似乎证明所有这些群体都是新属的命题。
更新日期:2021-01-03
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