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• W3000332130 abstract "Akin to all damselflies, Calopteryx (family Calopterygidae), commonly known as jewel wings or demoiselles, possess dichoptic (separated) eyes with overlapping visual fields of view. In contrast, many dragonfly species possess holoptic (dorsally fused) eyes with limited binocular overlap. We have here compared the neuronal correlates of target tracking between damselfly and dragonfly sister lineages and linked these changes in visual overlap to pre-motor neural adaptations. Although dragonflies attack prey dorsally, we show that demoiselles attack prey frontally. We identify demoiselle target-selective descending neurons (TSDNs) with matching frontal visual receptive fields, anatomically and functionally homologous to the dorsally positioned dragonfly TSDNs. By manipulating visual input using eyepatches and prisms, we show that moving target information at the pre-motor level depends on binocular summation in demoiselles. Consequently, demoiselles encode directional information in a binocularly fused frame of reference such that information of a target moving toward the midline in the left eye is fused with information of the target moving away from the midline in the right eye. This contrasts with dragonfly TSDNs, where receptive fields possess a sharp midline boundary, confining responses to a single visual hemifield in a sagittal frame of reference (i.e., relative to the midline). Our results indicate that, although TSDNs are conserved across Odonata, their neural inputs, and thus the upstream organization of the target tracking system, differ significantly and match divergence in eye design and predatory strategies.Video AbstracteyJraWQiOiI4ZjUxYWNhY2IzYjhiNjNlNzFlYmIzYWFmYTU5NmZmYyIsImFsZyI6IlJTMjU2In0.eyJzdWIiOiI0OWJkOGZiOWI3ZGExNjQ3Y2YzNGZkMTIwNmY1ZGEzNSIsImtpZCI6IjhmNTFhY2FjYjNiOGI2M2U3MWViYjNhYWZhNTk2ZmZjIiwiZXhwIjoxNjMyNDA2MDI1fQ.cofkzRB_yBx8arTluJ_zvB6MjrJJPujWRW4r4MEd539Zs19EqJVx5_X47uH5Ro-Vdgs2mMUCZXrUviOLKY1D1ixEaY5S9jpQPzdbfnmpNjndiE2iyDPv1erQb1241no2mX6AYUvFb840ioLLHubLINW5fbFpYx0uDt1LLBYQZa_FpofhgYejAZuFt5vpBHX76x_E9b_AAcEBywXeZ-bFMPR5jU0zOhOp5UJvJFkfQ_moROeZiSRhGTL0aPNbMVJM_YMPw7UZ9McLCfdzetsgffpHApngyDc_dUOf1qRX22vpAtWGhbRZmB85vzdza2g2yJrlJsdUx9mPkhvY7ESfuA(mp4, (53.25 MB) Download video" @default.
• W3000332130 created "2020-01-23" @default.
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• W3000332130 date "2020-02-01" @default.
• W3000332130 modified "2023-10-06" @default.
• W3000332130 title "Binocular Encoding in the Damselfly Pre-motor Target Tracking System" @default.
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• W3000332130 doi "https://doi.org/10.1016/j.cub.2019.12.031" @default.
• W3000332130 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31956029" @default.
• W3000332130 hasPublicationYear "2020" @default.
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