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Mathematical Model and microCT-Based Kinematic Analysis of the Rostrum Mouthparts in Cyrtotrachelus buqueti Guer (Coleoptera: Curculionidae)

Published online by Cambridge University Press:  17 May 2021

Longhai Li ,
Ce Guo ,
Shun Xu ,
Huafeng Guo ,
Ping Yu ,
Lei Liu  and
Jing Tian
Longhai Li
Affiliation:
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou221018, China
Ce Guo*
Affiliation:
Institute of Bio-inspired Structure and Surface Engineering, College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing210016, China
Shun Xu
Affiliation:
Key Laboratory of Bionic Engineering (Ministry of Education, China), College of Biological and Agricultural Engineering, Jilin University, Changchun130025, China
Huafeng Guo
Affiliation:
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou221018, China
Ping Yu
Affiliation:
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou221018, China
Lei Liu
Affiliation:
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou221018, China
Jing Tian
Affiliation:
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou221018, China
*
*Author for correspondence: Ce Guo, E-mail: guozc@nuaa.edu.cn
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Abstract

To uncover the chewing mechanism of Cyrtotrachelus buqueti Guer, a mathematical model was created and a kinematic analysis of its rostrum mouthparts was conducted for, to our knowledge, the first time. To reduce noise and improve the quality of scanning electron micrographs of the weevil's mouthparts, nonlocal means and integral nonlocal means algorithms were proposed. Additionally, based on a comparison and analysis of five classical edge detection algorithms, a multiscale edge detection algorithm based on the B-spline wavelet was used to obtain the boundaries of structural features. The least squares method was used to analyze the data of the mouthparts to fit the mathematical model and fitted curves were obtained using Gaussian equations. The results show that curvature and concave–convex variations of the weevil's mouthparts can highlight fluctuations in friction effects when it chews bamboo shoots, which is helpful in preventing debris from bamboo shoots or other debris from sticking to the mouthpart surfaces. Moreover, this paper highlights the utility of micro-computed tomography (microCT) for three-dimensional (3D) reconstruction and a flowchart is suggested. The reconstructed slices were 9.0 μm thick and an accurate 3D rendered model was obtained from a series of microCT slices. Finally, a real model of the rostrum mouthparts was analyzed using finite-element analysis. The results provide a biological template for the design of a novel bionic drilling mechanism.

Keywords

finite-element analysismathematical modelmicro-computed tomographyrostrum mouthpartsweevil
Type
Biological Applications
Information
Microscopy and Microanalysis , Volume 27 , Issue 4 , August 2021 , pp. 860 - 877
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of the Microscopy Society of America

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