Detecting taxonomic signal in an under-utilised character system: geometric morphometrics of the forcipular coxae of Scutigeromorpha (Chilopoda).
Detecting taxonomic signal in an under-utilised character system: geometric morphometrics of the forcipular coxae of Scutigeromorpha (Chilopoda).
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DOI：
10.3897/zookeys.156.1997
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发表时间：
2011
期刊：
影响因子：
1.3
通讯作者：
Edgecombe GD
中科院分区：
文献类型：
--
作者：
Gutierrez BL;Macleod N;Edgecombe GD
尽管Markus w<s:1> rmli在其1974年的分类特征综述中提出在这些结构中可能发现一些潜在的信息变异，但迄今为止，这些结构在确定刀叉形蜈蚣的系统分类中几乎没有发挥任何作用。几何形态计量学分析用于评估w<s:1> rmli的建议，特别是确定指点髋的形状是否包含对诊断物种有用的信息。采用基于地标和半地标的采样方法，对来自Sphendononema、Scutigera、Dendrothereua、Thereuonema、Thereuopoda、Thereuopodina、Allothereua和Parascutigera属的8个物种的尾骨几何特征进行了表征，以总结类群特有的形态变化。典型变量分析表明，这些结构在不同系统水平的分类群之间存在显著差异。为典型变量空间计算的模型有助于识别属之间的主要形状差异，包括总长度/宽度、外臀缘曲率以及髋股骨髁向外侧突出的程度。Jackknifed判别函数分析表明，在平均61%的情况下，forcipular尾端训练集标本被分配到正确的物种，其中最准确的分配是Parascutigera （Parascutigera guttata）和Thereuonema （Thereuonema microstoma）。在我们的数据集中，地理上分布广泛的物种长角龙足虫、龙骨蝶、鞘翅目鳞翅目和林氏树突甲表现出最少的诊断性协同。来自东亚和东南亚不同地区的长角兽类种群之间存在明显的区别，表明在这种情况下，广泛的同义关系可能掩盖了可诊断的种间尾端形状差异。
To date, the forcipules have played almost no role in determining the systematics of scutigeromorph centipedes though in his 1974 review of taxonomic characters Markus Würmli suggested some potentially informative variation might be found in these structures. Geometric morphometric analyses were used to evaluate Würmli’s suggestion, specifically to determine whether the shape of the forcipular coxa contains information useful for diagnosing species. The geometry of the coxae of eight species from the genera Sphendononema, Scutigera, Dendrothereua, Thereuonema, Thereuopoda, Thereuopodina, Allothereua and Parascutigera was characterised using a combination of landmark- and semi-landmark-based sampling methods to summarize group-specific morphological variation. Canonical variates analysis of shape data characterizing the forcipular coxae indicates that these structures differ significantly between taxa at various systematic levels. Models calculated for the canonical variates space facilitate identification of the main shape differences between genera, including overall length/width, curvature of the external coxal margin, and the extent to which the coxofemoral condyle projects laterally. Jackknifed discriminant function analysis demonstrates that forcipular coxal training-set specimens were assigned to correct species in 61% of cases on average, the most accurate assignments being those of Parascutigera (Parascutigera guttata) and Thereuonema (Thereuonema microstoma). The geographically widespread species Thereuopoda longicornis, Sphendononema guildingii, Scutigera coleoptrata, and Dendrothereua linceci exhibit the least diagnostic coxae in our dataset. Thereuopoda longicornis populations sampled from different parts of East and Southeast Asia were significantly discriminated from each other, suggesting that, in this case, extensive synonymy may be obscuring diagnosable inter-species coxal shape differences.
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影响因子：
--
作者：
Adams, DC;Rohlf, FJ;Slice, DE
通讯作者：
Slice, DE
DOI：
10.1111/j.1096-3642.2009.00564.x
发表时间：
2009-06-01
影响因子：
2.8
作者：
Bolton, Samuel J.;MacLeod, Norman;Edgecombe, Gregory D.
通讯作者：
Edgecombe, Gregory D.
影响因子：
3.6
作者：
Edgecombe, Gregory D.;Giribet, Gonzalo
通讯作者：
Giribet, Gonzalo
影响因子：
2.2
作者：
Edgecombe, Gregory D.;Giribet, Gonzalo
通讯作者：
Giribet, Gonzalo
影响因子：
12.1
作者：
MacLeod, N
通讯作者：
MacLeod, N