學術資源整合系統-相關推薦

 
作者Jeng, M.-L.;Y. Suzuki;C.-Y. Chang;T.-R. Chen
出版日期2021
已接受20201120
接受證明Full Text
著作名稱Do holometabolous insects molt spontaneously after adulthood? An exceptional case report in fireflies (Coleoptera: Lampyridae), with discussion of its inferred endocrine regulation especially in relation to paedomorphism
刊名Arthropod Structure & Development
被收錄索引SCI
主題動物
關鍵字paedomorphism, Lamprigera, post-imago molt, endocrine regulation, reproductive stress
摘要It has been a traditionally held view that winged insects stop molting after they reach adulthood. We observed a fascinating phenomenon of a post-imago molt occurring in the paedomorphic females of a firefly species in Taiwan over the last two years. By rearing Lamprigera minor larvae to adults, four out of the five unmated females studied were found undergoing an extra molt 8-18 days after adult eclosion. They have been reproductively mature when the post-imago molt occurred, as evidenced by the eggs inside their bodies. The four females died without oviposition whereas the only normal female laid eggs. A comparison of exuviae of different stages confirmed the existence of post-imago ecdysis. The adult skin differs from the pupal one mainly in the mouthparts and leg structures. No mix of pupal and adult traits was seen in the adult skin. The females retained the same morphology after the extra molt. A close examination of the post-imago molting females revealed that their oviduct openings were all blocked by larval or pupal skin and thus unable to lay eggs. The reproductive stress may invoke an endocrine disorder and lead to an extra molt. We propose that L. minor females retain their prothoracic glands even as adults, allowing them to molt as adults under certain environmental or physiological conditions. Thus, paedomorphosis of L. minor is reflected in both the external morphology as well as the internal physiology. The possible developmental changes associated with the evolution of paedomorphism are discussed.
系統號NO000005863

Aug 16 2018 10:46:44
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