Insect Mouthparts: Evolution, Biomechanics, and Ecological Significance

A special issue of Insects (ISSN 2075-4450).

Deadline for manuscript submissions: closed (15 January 2026) | Viewed by 1470

Special Issue Editor


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Guest Editor
Department of Biological Sciences, Kent State University at Stark, North Canton, OH, USA
Interests: fluid-feeding insects; evolutionary ecology; insect mouthpart functionality; conservation biology; insect cuticle adaptations; biomechanics

Special Issue Information

Dear Colleagues,

In terms of biodiversity and ecological services, no group of eukaryotic organisms are as successful as insects. Their successes are linked to their ability to feed on an extensive array of food sources, including hard and soft materials and Newtonian and non-Newtonian fluids, which have allowed insects to flourish in a range of environmental conditions and contribute to their global occupancy. Studies of insect mouthparts branch into many fields, including biomechanics, ontogenetics, and phylogenetics. In addition, research on this topic has become more rigorous and multidisciplinary, employing novel techniques and technology, involving biologists, physicists, and engineers. Here, we are pleased to invite submissions of research and review articles to this Special Issue of Insects. Papers that consider all aspects of insect mouthparts will be considered, including their development, material and mechanical properties, role in ecological services, and evolutionary history.

Dr. Matthew Lehnert
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biomechanics
  • feeding habits
  • feeding mechanisms
  • mouthpart ontogeny

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Published Papers (1 paper)

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Research

34 pages, 66240 KB  
Article
Morphological Modification of the Mouthparts of Aphids (Hemiptera: Sternorryncha: Aphididae)
by Yuchen Shi, Łukasz Depa, Jolanta Brożek and Wu Dai
Insects 2026, 17(1), 87; https://doi.org/10.3390/insects17010087 - 13 Jan 2026
Cited by 1 | Viewed by 877
Abstract
Comparative morphological analysis of the labrum and labium among nine aphid species—Uroleucon sp., Glyphina betulae, Myzus cerasi, Panaphis juglandis, Chaitophorus sp., Lachnus roboris, Forda sp., Paracletus cimiciformis, and Trama sp., belonging to six subfamilies—reveals marked interspecific variation [...] Read more.
Comparative morphological analysis of the labrum and labium among nine aphid species—Uroleucon sp., Glyphina betulae, Myzus cerasi, Panaphis juglandis, Chaitophorus sp., Lachnus roboris, Forda sp., Paracletus cimiciformis, and Trama sp., belonging to six subfamilies—reveals marked interspecific variation in structure, segmentation, and sensilla equipment. The labrum is generally triangular and plate-like, ranging from 88.8 μm (M. cerasi) to 358.1 μm (L. roboris). However, Trama sp. exhibits a distinctive conical labrum (311.1 μm) bearing three pairs of sensilla trichodea (St2)—unique among the examined taxa. Most species possess a four-segmented labium, while Trama sp. and L. roboris exhibit five segments. The second segment is the longest and most elaborate, bearing dense arrays of sensilla or spiniform tubercles in several species. Sensilla trichodea (St1–St5) are widespread across taxa, showing the highest densities in Chaitophorus sp St1, Trama and L. roboris St2, Uroleucon sp St3, and P. cimiciformis St4, whereas Trama sp. uniquely combines sensilla St2, St3, St5, and sensilla basiconica (Sb2). Sensilla basiconica (Sb1) are consistently positioned at the base of the labrum and the fourth labial segment, except in Trama sp., which presents sensilla St3. Distinct cuticular modifications—including apical cuticular processes and granular protrusions—occur only in Trama sp. and L. roboris, suggesting lineage-specific adaptations. These morphological patterns indicate that aphid mouthpart diversity reflects functional specialisation linked to host-plant structural variation. Full article
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