Intercastes in the ant Aphaenogaster rugulosa (Formicidae: Myrmicinae): morphological variation and adaptive potential

IF 1.4 3区 农林科学 Q2 ENTOMOLOGY
A. Khalife, H. Sasaki, F. Ito
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引用次数: 0

Abstract

Among eusocial insects, ants show the most advanced morphological division of labor with large winged queens, smaller wingless workers, and phenotypically intermediate castes. These intermediate castes may have evolved from the selection of developmental errors called intercastes. Intercastes are unusual phenotypes that show uncoordinated expression of worker and queen traits. These rare specimens provide remarkable insights into the advanced morphological evolution of the division of labor unique to ants. While they have been reported in several genera of the subfamily Myrmicinae, a single recent study described intercastes in the genus Aphaenogaster (210 spp). Here, we provide the first record of intercastes in an Asian species, Aphaenogaster rugulosa, endemic to the Japanese island of Yonaguni-jima. Using allometric measurements, scanning electron microscopy and dissections, we describe the trait combination of seven intercastes and compare it to worker and queen phenotypes. We discuss the modular origin of these rare phenotypes and elaborate on the potential role of intercastes in ant evolution.

Abstract Image

蚂蚁 Aphaenogaster rugulosa(蚁科:蚁属)的蚁后:形态变异和适应潜力
在社会性昆虫中,蚂蚁显示出最先进的形态分工,有大翅膀的蚁后、较小的无翅膀工蚁以及表型上的中间种群。这些中间种群可能是由被称为 "种间"(intercastes)的发育错误选择进化而来的。中间种群是一种不寻常的表型,表现出工蜂和蜂王不协调的特征。这些罕见的标本为了解蚂蚁特有的分工的高级形态进化提供了非凡的见解。虽然在蚁亚科的多个属中都有关于它们的报道,但最近的一项研究描述了Aphaenogaster属(210种)中的蚁后。在这里,我们首次记录了亚洲物种 Aphaenogaster rugulosa(日本与那国岛的特有物种)的鞘间虫。通过异速测量、扫描电子显微镜和解剖,我们描述了7种间种的性状组合,并将其与工蜂和蜂后的表型进行了比较。我们讨论了这些罕见表型的模块起源,并阐述了蚁后在蚂蚁进化中的潜在作用。
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来源期刊
Insectes Sociaux
Insectes Sociaux 生物-昆虫学
CiteScore
2.70
自引率
7.70%
发文量
43
审稿时长
6-12 weeks
期刊介绍: Insectes Sociaux (IS) is the journal of the International Union for the Study of Social Insects (IUSSI). It covers the various aspects of the biology and evolution of social insects and other presocial arthropods; these include ecology, ethology, morphology, population genetics, reproduction, communication, sociobiology, caste differentiation and social parasitism. The journal publishes original research papers and reviews, as well as short communications. An international editorial board of eminent specialists attests to the high quality of Insectes Sociaux, a forum for all scientists and readers interested in the study of social insects.
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