Comparative studies on alate wing formation in two related species of rotten-wood termites:: Hodotermopsis sjostedti and Zootermopsis nevadensis (Isoptera, Termopsidae)
Comparative studies on alate wing formation in two related species of rotten-wood termites:: Hodotermopsis sjostedti and Zootermopsis nevadensis (Isoptera, Termopsidae)
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DOI：
10.1007/s00040-003-0736-2
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发表时间：
2004-08-01
期刊：
影响因子：
1.3
通讯作者：
Matsumoto, T
中科院分区：
文献类型：
--
作者：
Miura, T;Koshikawa, S;Matsumoto, T
白蚁群体由几种类型的种姓组成，这些种姓在胚后发育过程中分化。在白蚁科白蚁中，有翅类通常由两个若虫龄期和三次蜕皮事件从无翅龄期区分开来。在这里，我们报告的腐木白蚁Hodotermopsis sjostedti。若虫在假蛹期和有翅期之间只有一个龄期。在每年的6月/7月的有翅繁殖季节，我们观察到一些小翅芽背肿胀。这些若虫个体随后仅通过一次蜕皮而蜕皮为有翅虫。我们研究了它们的组织学和内部形态，并观察到新形成的翅膀的折叠模式是非常不同的，从密切相关的物种Zootermopsis nevadensis的第二阶段的双翅。H. sjostedti是在相对较小的翅芽内部形成的，因此必须以复杂的方式折叠。我们的观察显示，折叠翼的尖端被拉长和弯曲，使得它们在正中平面重叠。我们认为，异时的进化变化占若虫发展到一个单一的年龄压缩。我们还认为，这可能发生在该物种的个体或群体水平。
Termite colonies are comprised of several types of castes that differentiate throughout postembryonic development. In termopsid termites (family Termopsidae), alates are normally differentiated from apterous instars by two nymphal instar stages and three moulting events. Here, we report that of the rotten-wood termite Hodotermopsis sjostedti. There is only a single nymphal instar between the pseudergate and alate stages. During the annual alate production season in June/July, we observed some nymphs with small wing buds which were dorsally swollen. Those nymphal individuals subsequently moulted into alates through only a single moult. We examined their histology and internal morphology and observed that the folding pattern of the newly formed wings was very different from that seen in second stage nymphs of the closely related species Zootermopsis nevadensis. The newly formed wings of H. sjostedti are formed inside the relatively smaller wing buds and therefore must be folded in a complicated manner. Our observations revealed that the tips of the folded wings were elongated and bent, such that they overlapped in the median plane. We suggest that heterochronic evolutionary change accounts for the compression of nymphal development into a single instar. We also suggest that this probably occurred at either the individual or colony level in this species.