化石研究が明らかにした最古の幼生の高解像度視覚(Fossil Study Reveals Oldest Larval Eyes with High-Resolution Vision)

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2025-03-03 ミュンヘン大学(LMU)

ミュンヘン大学(LMU)の研究者たちは、約1億年前の琥珀に閉じ込められた化石を調査し、白亜紀のクサカゲロウの幼虫が高度に発達した視覚システムを持っていたことを明らかにしました。現生の多くの昆虫幼虫は、単純な眼(ステマタ)を持ち、基本的な視覚機能を果たしていますが、一部の捕食性幼虫は、アリジゴクやハンミョウの幼虫のように、高度な視覚システムを進化させています。今回の化石研究により、クサカゲロウの幼虫も同様の視覚能力を持っていたことが示され、これはこの種の幼虫が高解像度の視覚を持っていた最古の証拠となります。

<関連情報>

両眼視を持つ白亜紀のクサカゲロウの幼虫は、洗練された単純な目の収斂進化を示している Cretaceous lacewing larvae with binocular vision demonstrate the convergent evolution of sophisticated simple eyes

Carolin Haug, Florian Braig, Simon J. Linhart, Derek E. G. Briggs, Roland R. Melzer, Alejandro Caballero, Yanzhe Fu, Gideon T. Haug, Marie K. Hörnig, Joachim T. Haug
Insect Science  Published: 18 February 2025
DOI:https://doi.org/10.1111/1744-7917.13509

化石研究が明らかにした最古の幼生の高解像度視覚(Fossil Study Reveals Oldest Larval Eyes with High-Resolution Vision)

Abstract

Many insects and their relatives are renowned for sophisticated compound eyes, which are also preserved in the fossil record. Yet there are other types of eyes, notably the so-called stemmata of holometabolans, such as beetles, bees, and butterflies. Stemmata are not as effective as compound eyes, except in some predatory larvae. Here we report three lacewing larvae with large forward-directed stemmata from Cretaceous Kachin amber, Myanmar. The stemmata are large relative to those of other fossil lacewing larvae, comparable to the simple eyes of modern larvae capable of image formation. The head is very wide in one larva, representing a new type of morphology as demonstrated by a quantitative comparison of the head and stylets of over 400 fossil and extant lacewing larvae. The arrangement of the exceptionally large stemmata of the larvae reported here provides stereoscopic vision. These new specimens demonstrate the convergent evolution of highly developed simple eyes in at least two additional lineages of lacewings, showcasing the enormous diversity of lacewing larvae in the Cretaceous.

生物化学工学
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