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Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2026,10,13]]},"abstract":"<jats:p>\n                    The evolution of allometry, changing how morphological traits scale to body size, has fueled adaptive radiations. In ants, allometry has facilitated the repeated evolution of a worker\u2013soldier caste system. Here, we reveal an unexpected morphological pattern and its superorganismal regulation within the hyperdiverse genus\n                    <jats:italic toggle=\"yes\">Pheidole<\/jats:italic>\n                    . We uncovered that antennal sizing between the small worker and the big soldier is identical, lacking intercaste scaling (antennae-body scaling is decoupled) yet retaining intracaste scaling. Furthermore, we have pinpointed the evolutionary origin of this decoupling. Finally, manipulations of social environment, developmental hormones, and interorgan signaling influence the modularity-integration of trait-body covariation, uncovering head-to-body decoupling and the production of novel nanoworkers and nanosoldiers. Collectively, this challenges our previous understandings of trait covariation, modularity, and their regulation, from individual to society and across species.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2612172123","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T18:04:38Z","timestamp":1791309878000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":0,"title":["Breaking trait scaling via the evolution and regulation of dimorphic decoupling in ants"],"prefix":"10.1073","volume":"123","author":[{"given":"Erica","family":"Vong","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03c4mmv16","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Biology, University of Ottawa","place":["Ottawa, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shannon","family":"Parisien","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03c4mmv16","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Biology, University of Ottawa","place":["Ottawa, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H\u00e9l\u00e8ne","family":"Orfali","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03c4mmv16","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Biology, University of Ottawa","place":["Ottawa, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7054-8619","authenticated-orcid":false,"given":"Rajendhran","family":"Rajakumar","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03c4mmv16","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Biology, University of Ottawa","place":["Ottawa, Canada"]},{"id":[{"id":"https:\/\/ror.org\/03c4mmv16","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Cellular and Molecular Medicine, University of Ottawa","place":["Ottawa, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"e_1_3_4_1_2","volume-title":"Vier B\u00fccher von Menschlicher Proportion","author":"D\u00fcrer A.","year":"1528","unstructured":"A. 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