长蝽类高级阶元系统发育初探(半翅目)

本文运用支序分析的原理和方法,采用Hennig86程序研究长蝽类（lygaeoidcomplex）亚科以上阶元间的系统发育关系．研究用分类单元代表共计21种,选用性状共48个,内群共包括19个OTUs,并采用“理想祖先”作为单一外群．计算得到的首选最简约树步长＝165,CI＝0．32,RI＝0．51．相应支序图所提示的系统发育再建景象主要包括：（1）原有意义上的长蝽科为一并系群或复系群．（2）Rhyparochrominae与红蝽类互成姐妹群．（3）Artheneinae似为一较原始而孤立的支系．（4）支持Cyminae与Berytidae接近的意见．（5）支持“malcidline”意见．

A PRELIMINARY STUDY ON THE PHYLOGENETIC RELATIONSHIPS BETWEEN THE HIGHER GROUPS OF LYGAEOID COMPLEX,(HEMIPTERA:HETEROIPTERA)

he phylogenetic relationships between groups higher than subfamilial rank in the lygaeoid complex were studied using cladistic method. The ingroups comprised of 19 OTUs,an hypothetical ancestor was used as the outgroup. 48 characters were selected for theanalyses. The calculations were performed using the Henning 86 programm (version 1. 5)based on the principle of parsimony. One preferred parsimonious tree (length~ 165, CI0. 32, RI = 0. sl ) was obtained and the relevant cladogram (fig. 1 ) depicted. The reconstructed phylogeny implied by the cladogram includes the following main points: (1). The"Lygaeidae" in the conventional sense is a paraphyletic or polyphyletic group. (2). TheRhyparochrominae is the sister group of the pyrrhocoroids, which in turn forms the sisterclade of the "Lygaeid" clade. (3). Artheneidae is probably a comparatively isolated andprimitive clade. (4). Supporting the "Cyminae--Berytidae connection" hypothesis. (5). Supporting the "Malcid line" hypothesis.