dichotomus is a popular and familiar insect to children and adults, and is sold as a pet at department stores and DIY shops during the summer. 2 Adult beetles belonging to Dynastini (Coleoptera, Scarabeidea Dynastini). (A) Trypoxylus dichotomus (male), (B) Trypoxylus dichotomus (female), (C) Chalcosoma atlas (male), (D) Beckius beccarii (male), (E) Dynastes hercules (male), (F) Dynastes tityus (male), (G) Megasoma elephas (male), (H) Eupatorus birmanicus (male), (I) Augosoma centaurus (male).įirst, I will introduce T. My postdoc project is to understand how exaggerated horns are acquired and formed in Japanese rhinoceros beetles ( Trypoxylus dichotomus) (Fig. Elucidating how these novel traits were acquired in Scarab species will lead to better understanding of the mechanisms of morphological diversification during evolution. Beetle horns display sexual dimorphism in many Scarab beetles, and their shapes, numbers, sizes and forming regions are highly diverged even among closely related species (Fig. (Q) The horn evo-devo team: Teruyuki Niimi (right) and myself.īeetle horns are thought to be an evolutionary novelty and are used as weapons for intraspecific combats between males. (C-P) The insects we work on in the lab: (C) Harmonia axyridis, (D) Aiolocaria hexaspilota, (E) Propylea japonica, (F) Doubledaya bucculenta, (G) Homoeogryllus japonicus, (H) Gryllus bimaculatus, (I) Conocephalus maculatus, (J) Cardiodactylus guttulus, (K) Bombyx mori, (L) Eurema mandarina, (M) Pedetontus nipponicus, (N) Thermobia domestica, (O) Acyrthosiphon pisum, (P) Gastrolina depressa. (B) Picture of the National Institute for Basic Biology building. 1 Location of the Niimi ‘s laboratory and our experimental insects (A) Location of National Institute for Basic Biology, Okazaki, Japan (). Our research interests focus on the evolutionary novelties that insects have acquired, and how various insect morphologies have arisen during evolution (Fig. I am Shinichi Morita, a postdoctoral researcher in Teruyuki Niimi’s lab at the National Institute for Basic Biology, Japan (Fig.
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