Morphology and systematic significance of sclerolepidia in the weevils (Coleoptera: Curculionoidea)
Morphology and systematic significance of sclerolepidia in the weevils (Coleoptera: Curculionoidea)
复制标题
DOI：
10.1017/s1477200005001714
复制
发表时间：
2006-06-01
影响因子：
1.9
通讯作者：
Hine, S. J.
中科院分区：
文献类型：
--
作者：
Lyal, C. H. C.;Douglas, D. A.;Hine, S. J.
硬鳞虫（Sclerolepidia）是象甲亚科Scolytinae、Cossoninae、Baridinae及象甲科Cryptorhynchinae、Conoderinae、Molytinae、Chellioninae和Cyclominae的某些族中仅沿着后腹缝分布的一种微小特化结构。它们的存在已被用来建立在亚科水平上的关系，虽然其中一些是值得怀疑的，因为误解的结构分布在整个类群。在石蛾科中，硬鳞虫可能是同源的，但提供的信息有限，有助于建立亚科之间的姐妹群关系，并且可能有多个缺失。类似的结构出现在Erikomidae和Eucnemidae中，但在鞘翅目的其他地方没有。结构证据表明，scleroiepidia是来自鳞片。它们的形态允许分为“鳞片状”，“指状”，“钉状”和“羽状”类型。鳞形硬鳞只有轻微的修改，从祖先的规模，可能是近形的类型，修改可能独立发生了一些时间。不同类型在种、属和更高层次上的分布提供了分类特征和系统发育信息。许多系统的变化被确定为必要的，在这个项目的研究sclerolepidia; 27属转移到部落的水平，这些变化列在附录中。硬鳞虫的功能可能在不同的科中有所不同，可能包括在飞行过程中感知后胸板和后胸板的相对位置，以及分泌的蜡或其他化学物质的扩散。
Sclerolepidia are minute specialized structures found only along the metepisternal suture in the weevil subfamilies Scolytinae, Cossoninae, Baridinae and some tribes in the Cryptorhynchinae, Conoderinae, Molytinae, Curculioninae and Cyclominae of the Curculionidae. Their presence has been used to establish relationships at subfamily level in the Curculionidae, although some of these are questionable, because of misperceptions of the distribution of the structure across taxa. Within the Curculionidae sclerolepidia are probably homologous, but provide limited information aiding establishment of sister-group relationships between subfamilies, and multiple loss is likely. Analogous structures occur in the Erirhinidae and the Eucnemidae, but not elsewhere in the Coleoptera. Structural evidence shows scleroiepidia to be derived from scales. Their morphology allows division into 'squamiform', 'digitate', 'peg-like' and 'plumose' types. Squamiform sclerolepidia are only slightly modified from the ancestral scale and are probably the plesiomorphic type, with modification probably occurring independently a number of times. Taxonomic characters and phylogenetic information are provided by distribution of different types within the weevils at species, genus and higher levels. Numerous systematic changes were identified as necessary during this project from the study of the sclerolepidia; 27 genera are transferred at tribal level and these changes are listed in an appendix. The functions of sclerolepidia probably differ across the Curculionidae, and may include sensing the relative positions of the metepisternum and metasternum during flight, and diffusion of secreted wax or other chemicals.