Cigliano Marfa Marta
Division Entomología, Museo de La Plata, 1900 La Plata, Argentina.
Cladistics. 1989 Dec;5(4):379-393. doi: 10.1111/j.1096-0031.1989.tb00570.x.
Abstract- A cladistic analysis of the endemic South American family Tristiridae was performed using 29 characters from external morphology and the genitalia. Polarity of characters was based on the outgroup comparison method. One most parsimonious cladogram of 54 steps was obtained, from which a classification of the family Tristiridae was constructed. The analysis of phylogenetic relationships showed that the different kinds of characters define taxa at different levels in the cladogram. Those mostly from the phallic complex define suprageneric taxa while those from external morphology characterize genera. It is hypothesized that in Tristiridae differentiation of the phallic complex preceded differentiation of external morphology and that characters from the phallic complex arc less conservative than those from the external morphology.
摘要——利用来自外部形态和生殖器的29个特征，对南美洲特有的三丝科进行了支序分析。特征的极性基于外类群比较法。得到了一个包含54步的最简约支序图，并据此构建了三丝科的分类。系统发育关系分析表明，不同类型的特征在支序图中定义了不同层次的分类单元。那些主要来自阴茎复合体的特征定义了超属分类单元，而那些来自外部形态的特征则表征了属。据推测，在三丝科中，阴茎复合体的分化先于外部形态的分化，并且来自阴茎复合体的特征不如来自外部形态的特征保守。
