Why the Long "Horns"? Fine‐Scale Morphology Suggests Tactile Demands Contributed to the Exaggeration of Male Longhorned Beetle Antennae (Coleoptera: Cerambycidae).
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| Title: | Why the Long "Horns"? Fine‐Scale Morphology Suggests Tactile Demands Contributed to the Exaggeration of Male Longhorned Beetle Antennae (Coleoptera: Cerambycidae). |
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| Authors: | French, Rowan L. K.1 (AUTHOR) rowan.french@mail.utoronto.ca, Kowalewska Groszkowska, Magdalena2 (AUTHOR), Rowe, Locke1 (AUTHOR), Mahler, D. Luke1 (AUTHOR), Karpiński, Lech2 (AUTHOR) |
| Source: | Ecology & Evolution (20457758). May2025, Vol. 15 Issue 5, p1-18. 18p. |
| Subject Terms: | *Insects, Cerambycidae, Antennas (Electronics), Sexual dimorphism, Senses |
| Abstract: | Insect antennae are covered in hairlike sensilla that detect diverse environmental cues. Selection on these functions has produced a bewildering variety of antennal forms, including many examples of sexual dimorphism (SD). Antenna length SD is particularly common, but poorly understood, in longhorned beetles (Coleoptera: Cerambycidae). Extremely elongate male antennae may extend the reach of individuals searching for mates, enabling rapid recognition via antennal contact. Alternatively, they may increase sensitivity to airborne pheromones by bearing more olfactory sensilla. We tested these hypotheses by modeling sensillum distributions and abundances across species and sexes of Anoplistes, a cerambycid genus with extensive variation in antenna length and SD. We found limited evidence that olfactory sensillum abundance scales with antenna segment length; instead, mechano‐ and contact chemosensory sensilla cluster near the antenna tip, consistent with contact‐mediated mate recognition. If the tip segment serves an important tactile role, that may explain why it is exceptionally elongated in males of several species with long, sexually dimorphic antennae. In other Anoplistes species with strong antennal SD, however, all segments exhibit similar levels of dimorphism. Collectively, our results suggest that alternative pathways to antenna SD evolved rapidly in Anoplistes, perhaps due to different patterns of selection on tactile sensation. [ABSTRACT FROM AUTHOR] |
| Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 185491538 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Why the Long "Horns"? Fine‐Scale Morphology Suggests Tactile Demands Contributed to the Exaggeration of Male Longhorned Beetle Antennae (Coleoptera: Cerambycidae). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22French%2C+Rowan+L%2E+K%2E%22">French, Rowan L. K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rowan.french@mail.utoronto.ca</i><br /><searchLink fieldCode="AR" term="%22Kowalewska+Groszkowska%2C+Magdalena%22">Kowalewska Groszkowska, Magdalena</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rowe%2C+Locke%22">Rowe, Locke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mahler%2C+D%2E+Luke%22">Mahler, D. Luke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Karpiński%2C+Lech%22">Karpiński, Lech</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ecology+%26+Evolution+%2820457758%29%22">Ecology & Evolution (20457758)</searchLink>. May2025, Vol. 15 Issue 5, p1-18. 18p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Insects%22">Insects</searchLink><br /><searchLink fieldCode="DE" term="%22Cerambycidae%22">Cerambycidae</searchLink><br /><searchLink fieldCode="DE" term="%22Antennas+%28Electronics%29%22">Antennas (Electronics)</searchLink><br /><searchLink fieldCode="DE" term="%22Sexual+dimorphism%22">Sexual dimorphism</searchLink><br /><searchLink fieldCode="DE" term="%22Senses%22">Senses</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Insect antennae are covered in hairlike sensilla that detect diverse environmental cues. Selection on these functions has produced a bewildering variety of antennal forms, including many examples of sexual dimorphism (SD). Antenna length SD is particularly common, but poorly understood, in longhorned beetles (Coleoptera: Cerambycidae). Extremely elongate male antennae may extend the reach of individuals searching for mates, enabling rapid recognition via antennal contact. Alternatively, they may increase sensitivity to airborne pheromones by bearing more olfactory sensilla. We tested these hypotheses by modeling sensillum distributions and abundances across species and sexes of Anoplistes, a cerambycid genus with extensive variation in antenna length and SD. We found limited evidence that olfactory sensillum abundance scales with antenna segment length; instead, mechano‐ and contact chemosensory sensilla cluster near the antenna tip, consistent with contact‐mediated mate recognition. If the tip segment serves an important tactile role, that may explain why it is exceptionally elongated in males of several species with long, sexually dimorphic antennae. In other Anoplistes species with strong antennal SD, however, all segments exhibit similar levels of dimorphism. Collectively, our results suggest that alternative pathways to antenna SD evolved rapidly in Anoplistes, perhaps due to different patterns of selection on tactile sensation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/ece3.71380 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Insects Type: general – SubjectFull: Cerambycidae Type: general – SubjectFull: Antennas (Electronics) Type: general – SubjectFull: Sexual dimorphism Type: general – SubjectFull: Senses Type: general Titles: – TitleFull: Why the Long "Horns"? Fine‐Scale Morphology Suggests Tactile Demands Contributed to the Exaggeration of Male Longhorned Beetle Antennae (Coleoptera: Cerambycidae). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: French, Rowan L. K. – PersonEntity: Name: NameFull: Kowalewska Groszkowska, Magdalena – PersonEntity: Name: NameFull: Rowe, Locke – PersonEntity: Name: NameFull: Mahler, D. Luke – PersonEntity: Name: NameFull: Karpiński, Lech IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20457758 Numbering: – Type: volume Value: 15 – Type: issue Value: 5 Titles: – TitleFull: Ecology & Evolution (20457758) Type: main |
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