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Evidence of rodent pollination inCajophora coronata (Loasaceae)

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Abstract

Vegetative and floral features ofCajophora coronata (Loasaceae) suggest adaptations to pollination by rodents: (1) mammal guard represented by a covering of stinging hairs; (2) geoflory; (3) white corolla; (4) open flowers with copious low concentration nectar; (5) abundant pollen; (6) maximum pollen and nectar presentation in the afternoon hours and in the night. Palynological analysis revealed pollen loads ofC. coronata on the nostrils and whiskers of captured rodents (Graomys griseoflavus, fam.Muridae). Pollen and anther remains were also found in faeces sampled in the surroundings. Additional evidence includes rodent footprints obtained by placing smoked plates beneath the flowers, which revealed flower visitation during the night. These observations are to our knowledge the first evidence of flower visitation by rodents in South America and the first in the New World outside the range of flower bats and bat flowers.

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Authors and Affiliations

  1. Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET), 495-5000, Casilla de Correo, Córdoba, Argentina

    Andrea A. Cocucci & Alicia N. Sérsic

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  1. Andrea A. Cocucci
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  2. Alicia N. Sérsic
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Cocucci, A.A., Sérsic, A.N. Evidence of rodent pollination inCajophora coronata (Loasaceae). Pl Syst Evol 211, 113–128 (1998). https://doi.org/10.1007/BF00984916

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  • DOI: https://doi.org/10.1007/BF00984916

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