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Intake of Plant Resin Through the Genitalia of Two Asian Assassin Bugs (Reduviidae: Harpactorinae: Harpactorini)
Journal of Insect Behavior ( IF 1 ) Pub Date : 2020-10-08 , DOI: 10.1007/s10905-020-09757-7
Tatsunori Takeda , Daisuke Sakata , Yukihiro Nishikawa , Takafumi Mizuno , Toshiharu Akino

Many insects use tactics to protect their eggs from predation, infection, and water loss, among other risks. Some assassin bugs only in the New World tribe Apiomerini are known to use plant substances, such as resin, instead of secretions to protect their eggs. Here, we report a novel storage mechanism and the utilization of plant resin for egg protection in Asian assassin bugs, Velinus nodipes and Agriosphodrus dohrni (tribe: Harpactorini). Adult females of both species were observed to take in plant resin through their genitalia. We reported on the handling of resin by these species and confirmed that A. dohrni adult females stored resin in their subrectal glands and that the substance covering their egg masses was derived from plant resin. This is the first report on the storage of plant resin inside the bodies of assassin bugs and on resin-protected eggs in Harpactorini. Such internal resin storage was not accompanied by external morphological features, as observed in some Apiomerini assassin bugs, thereby suggesting that this tactic has been overlooked and may have evolved in broader tribes of assassin bugs than previously thought.

中文翻译:

通过两种亚洲刺客臭虫(Reduviidae:Harpactorinae:Harpactorini)的生殖器摄入植物树脂

许多昆虫使用策略来保护它们的卵免受捕食、感染和失水等风险。一些仅在新世界部落 Apiomerini 中的刺客臭虫已知使用植物物质,例如树脂,而不是分泌物来保护它们的卵。在这里,我们报告了一种新的储存机制和植物树脂在亚洲刺客虫、Velinus nodipes 和 Agriosphodrus dohrni(部落:Harpactorini)中保护卵的利用。观察到这两个物种的成年雌性通过它们的生殖器摄取植物树脂。我们报告了这些物种对树脂的处理,并证实 A. dohrni 成年雌性将树脂储存在其直肠下腺中,并且覆盖其卵块的物质来自植物树脂。这是关于在刺虫体内储存植物树脂和 Harpactorini 中树脂保护的鸡蛋的第一份报告。这种内部树脂储存并没有像在一些 Apiomerini 刺客虫中观察到的那样伴随着外部形态特征,因此表明这种策略已被忽视,并且可能在比以前认为的更广泛的刺客虫部落中进化。
更新日期:2020-10-08
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