DOI: 10.5061/dryad.h4j6c
title: Data from: Mimicry refinement: Phenotypic variations tracking the local optimum

description: 1. Müllerian mimicry between chemically defended preys is a textbook
 example of natural selection favouring phenotypic convergence onto a
 shared warning signal. Studies of mimicry have concentrated on deciphering
 the ecological and genetic underpinnings of dramatic switches in mimicry
 association, producing a well-known mosaic distribution of mimicry
 patterns across geography. However, little is known about the accuracy of
 resemblance between natural co-mimics when the local phenotypic optimum
 varies. 2. In this study, using analyses of wing shape, pattern and hue,
 we quantify multimodal phenotypic similarity between butterfly co-mimics
 sharing the so-called postman pattern in different localities with varying
 species composition. 3. We show that subtle but consistent variation
 between populations of the localised species, Heliconius timareta
 thelxinoe, enhance resemblance to the abundant co-mimics which drive the
 mimicry in each locality. 4. Those results suggest that rarer co-mimics
 track the changes in the phenotypic optimum caused by gradual changes in
 the composition of the mimicry community, providing insights into the
 process by which intra-specific diversity of mimetic pattern may arise.
 Furthermore, our results suggest a multimodal evolution of similarity,
 with coordinated convergence in different features of the phenotype such
 as wing outline, pattern and hue. 5. Finally, multilocus genotyping allows
 estimating local hybridization rates between H. timareta and co-mimic H.
 melpomene in different populations, raising the hypothesis that mimicry
 refinement between closely-related co-mimics may be enhanced by adaptive
 introgression at loci modifying the accuracy of resemblance.
description: Phenotypic and genotypic
 caracterisation of the samplesThe data file includes a
 full list of specimen with collection places, sexes and species, a
 genotype spreadsheet with the microsatellites alleles and several
 spreadsheets with the data quantifying the different modalities of the
 phenotype (details below). Each specimen is identified by a unique id in
 the genotype/phenotype data. Please refer to the specimen information for
 its caracteristics. For all: FW = forewing HW = hindwing v = ventral d =
 dorsal * Specimen information: All collection details on the specimen used
 in the study (cf supplementary information) * Genotype (microsatellites):
 Each line is a specimen. Each column is a microsatellite locus. 000000 are
 missing data. * Shape data (morphometrics): Each line is a specimen. The
 14 (HW) or 15 (FW) columns corresponds to 14 or 15 landmarks with 2
 coordinates (X, Y). * Pattern data (Colour pattern modelling): Each line
 is a specimen. The columns are coordinates along the principal components.
 * Shape data (outline): Each line is a specimen. The columns are
 coordinates along the principal components. * Colour data (spectrometry):
 Spreadsheets called "Red, Yellow or Black" The first column is
 the wavelength. Each column corresponds to the reflectance of the given
 colour (in % of the white reference) for an individual. Measurements are
 averaged over two spectra (one measured on the right wing, the other on
 the left wing - or twice on the same wing if the other wing was
 damaged).Dryad_data.xlsx