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動物・自然 総合スレ / 1166

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amamas 2018/12/12 (水) 08:12:40

ヒラオヤモリ Hemidactylus platyurus は、小さな飛膜を持ち、スレンダーな体格という、飛行性ヤモリだけど、非飛行性ヤモリとの中間的な形態を示します…。
 

Acrobatic geckos, highly maneuverable on land and in the air, can also race on water: Geckos combine surface tension with foot slapping to stay above water surface
Asian geckos were observed running over water at nearly a meter per second, as fast as on land. Lab experiments show how. They get support from surface tension but also slap the water rapidly with their feet. They also semi-plane over the surface and use their tail for stabilization and propulsion. They thus sit between insects, which use only surface tension, and larger animals, which run upright via foot slapping alone.
ScienceDaily

 
中間的形態であるからこそ、地上・樹上(垂直平面上)・空中と、素早く行動圏を変更し、水上を走る事も出来るらしいです。
 
{飛行性生物への進化の移行段階も、或いは、非飛行性生物への進化過程も、その各段階での特徴(形質)は、それぞれの環境に適していた(適応的形質)であったのかなぁ…と}
(浪漫を感じます)

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