Male genital claspers influence female mate acceptance in the stick insect Clitarchus hookeri

Myers, Shelley S.; Buckley, Thomas R.; Holwell, Gregory I.

doi:10.1007/s00265-016-2163-6

Cited by 18 publications

(16 citation statements)

References 55 publications

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“…Alternatively, evolution of cercus morphology may be driven by sexual conflict over mating rate, in which selection favors females that are less easily grasped by males (Fincke et al 2007). Taxa such as damselflies or stick insects (Myers et al 2016) provide ideal systems to begin to tease apart mechanical and tactile contributions to RI. We might be better equipped to investigate the reproductive consequences of the widespread pattern of rapid, divergent evolution of male genitalia if we broaden our scope to include explicitly tactile mechanisms.…”

Section: Reproductive Isolation Early During Speciationmentioning

confidence: 99%

“…Where females discriminate against heterospecific reproductive structures (e.g., Bath et al 2012), the female nervous system poses a potentially more complex spectrum of incompatibilities compared to genitalia. Taxa such as damselflies or stick insects (Myers et al 2016) provide ideal systems to begin to tease apart mechanical and tactile contributions to RI. Neural circuits that integrate olfactory and auditory cues with internal physiological processes to influence female mating decisions are being mapped in Drosophila (Bussell et al 2014;Feng et al 2014;Zhou et al 2014), paving the way for similar mechanistic understanding of sensory modalities in emerging model systems.…”

Section: Reproductive Isolation Early During Speciationmentioning

confidence: 99%

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Mechanical and tactile incompatibilities cause reproductive isolation between two young damselfly species

Barnard

Fincke

McPeek

et al. 2017

Preprint

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2External male reproductive structures have received considerable attention as an early-acting support as a common cause of RI, the potential for mismatch of reproductive structures to cause 1 8 RI due to incompatible species-specific tactile cues has not been tested. We tested the 1 9 importance of mechanical and tactile incompatibilities in RI between Enallagma anna and E. 2 0 carunculatum, two damselfly species that diverged within the past ~250,000 years and currently 2 1 hybridize in a sympatric region. We quantified 19 prezygotic and postzygotic RI barriers using 2 2 both naturally occurring and lab-reared damselflies. We found incomplete mechanical isolation 2 3 between the two pure species and between hybrid males and pure species females. Interestingly, where mechanical isolation was incomplete, females showed greater resistance and refusal to 2 5 mate with hybrid or heterospecific males compared to conspecific males, which suggests that 2 6 tactile incompatibilities involving male reproductive structures can influence female mating 2 7 decisions and form a strong barrier to gene flow in early stages of speciation.

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Section: Reproductive Isolation Early During Speciationmentioning

confidence: 99%

Section: Reproductive Isolation Early During Speciationmentioning

confidence: 99%

Mechanical and tactile incompatibilities cause reproductive isolation between two young damselfly species

Barnard

Fincke

McPeek

et al. 2017

Preprint

View full text Add to dashboard Cite

show abstract

“…Additional studies have demonstrated that tactile cues from male organs influence female mating responses, via experimental manipulation of male structures and desensitization of females Briceño, Eberhard, & Robinson, 2007;Eberhard, 2002Eberhard, , 2010Myers, Buckley, & Holwell, 2016;Wulff, Schöneich, & Lehmann, 2018). Premating tactile isolation may also be important in vision-limited vertebrates.…”

Section: Introductionmentioning

confidence: 99%

Divergence in female damselfly sensory structures is consistent with a species recognition function but shows no evidence of reproductive character displacement

Barnard

Masly

2018

Ecology and Evolution

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Males and females transmit and receive signals prior to mating that convey information such as sex, species identity, or individual condition. In some animals, tactile signals relayed during physical contact between males and females before and during mating appear to be important for mate choice or reproductive isolation. This is common among odonates, when a male grasps a female's thorax with his terminal appendages prior to copulation, and the female subsequently controls whether copulation occurs by bending her abdomen to complete intromission. It has been hypothesized that mechanosensory sensilla on the female thoracic plates mediate mating decisions, but is has been difficult to test this idea. Here, we use North American damselflies in the genus Enallagma (Odonata: Coenagrionidae) to test the hypothesis that variation in female sensilla traits is important for species recognition. Enallagma anna and E. carunculatum hybridize in nature, but experience strong reproductive isolation as a consequence of divergence in male terminal appendage morphology. We quantified several mechanosensory sensilla phenotypes on the female thorax among multiple populations of both species and compared divergence in these traits in sympatry versus allopatry. Although these species differed in features of sensilla distribution within the thoracic plates, we found no strong evidence of reproductive character displacement among the sensilla traits we measured in regions of sympatry. Our results suggest that species‐specific placement of female mechanoreceptors may be sufficient for species recognition, although other female sensory phenotypes might have diverged in sympatry to reduce interspecific hybridization.

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“…Clitarchus tepaki was recently described on the basis of male and female genitalia, where this species has enlarged genital claspers compared with C. hookeri (Buckley et al, 2014). Male clasper morphology is important in stick insect classification as this organ is directly involved in mate recognition (Myers et al 2016). Clitarchus tepaki is disjunct between Te Paki/North Cape and the Parawanui area, Karikari Peninsula, a distribution that probably results from it previously extending across Northland pre-Pliocene and then becoming confined on islands during the Pliocene (Fig.…”

Section: Introductionmentioning

confidence: 99%

Genetic and morphometric data demonstrate alternative consequences of secondary contact inClitarchusstick insects

Myers

Holwell

Buckley

2017

Journal of Biogeography

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Aim Comparisons of independent secondary contact events provide insights into allopatric speciation. The geographic distribution of Clitarchus stick insects across northern New Zealand corresponds to islands that existed in the Pliocene. Subsequent joining to the mainland provided multiple opportunities for secondary contact. We address the hypothesis that secondary contact has similar effects on parental species, across two peninsulas, due to the simultaneous removal of allopatric barriers. Location Northland, New Zealand Methods We explore how genetic structure relates to morphological variation and biogeographical history of Clitarchus hookeri and C. tepaki. Mitochondrial DNA sequences were used to reconstruct phylogenetical relationships. Population structure was estimated using 14 microsatellite markers. We analysed genital morphology and genetic structure within a biogeographical context to identify the consequences of independent secondary contact events. Results Geographical patterns of genital shape indicate two independent hybrid swarms occur between C. hookeri and C. tepaki. Haplotype distributions and Bayesian cluster analyses reveal C. tepaki from the Aupouri Peninsula are distinguished from C. hookeri on the basis of both genetic structure and morphology. Clitarchus tepaki on the Karikari Peninsula did not group phylogenetically or through Bayesian clustering with C. tepaki from the Aupouri Peninsula. We observed a hybrid swarm along the Aupouri Peninsula. Main conclusions Clitarchus species were separated on Pliocene islands and then subsequently made independent secondary contact as land connections formed. Clitarchus tepaki on the Aupouri Peninsula maintained genetic integrity; whereas we hypothesize genetic swamping has occurred on Karikari Peninsula. Our data demonstrate different outcomes of independent secondary contact events.

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Male genital claspers influence female mate acceptance in the stick insect Clitarchus hookeri

Cited by 18 publications

References 55 publications

Mechanical and tactile incompatibilities cause reproductive isolation between two young damselfly species

Mechanical and tactile incompatibilities cause reproductive isolation between two young damselfly species

Divergence in female damselfly sensory structures is consistent with a species recognition function but shows no evidence of reproductive character displacement

Genetic and morphometric data demonstrate alternative consequences of secondary contact inClitarchusstick insects

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