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Two specimens exhibited spotless phenotypes, whereas one exhibited hypermelanism. Morphological assessments were conducted for two individuals, alongside genetic analysis of mitochondrial genes to determine phylogeographic relationships. Both specimens belonged to the South Pacific\/Atlantic\/Mediterranean haplogroup, with the first one associated with the main haplotype and the second one linked to a rarer haplotype. This study emphasizes the need for proper identification based on morphology and genetics when pigment disorders hinder a clear\u2010cut species assignment.\n                  <\/jats:p>","DOI":"10.1111\/jfb.70339","type":"journal-article","created":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T05:00:37Z","timestamp":1769749237000},"page":"1402-1406","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Pigmentation disorders in three specimens of spiny dogfish,\n                    <scp>\n                      <i>Squalus acanthias<\/i>\n                    <\/scp>\n                    Linnaeus, 1758, from the Gulf of Venice, northern Adriatic Sea"],"prefix":"10.1111","volume":"108","author":[{"given":"Jacopo","family":"Bernardi","sequence":"first","affiliation":[{"name":"Department of Biology University of Padua  Padua Italy"},{"name":"CESTHA, Centro Sperimentale per la Tutela degli Habitat Marina di Ravenna  Ravenna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Licia","family":"Finotto","sequence":"additional","affiliation":[{"name":"Department of Biology University of Padua  Padua Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giusy","family":"Catalano","sequence":"additional","affiliation":[{"name":"Department of Biological, Geological and Environmental Sciences University of Bologna  Ravenna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4210-9755","authenticated-orcid":false,"given":"Valentina","family":"Crobe","sequence":"additional","affiliation":[{"name":"Department of Biological, Geological and Environmental Sciences University of Bologna  Ravenna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alessia","family":"Cariani","sequence":"additional","affiliation":[{"name":"Department of Biological, Geological and Environmental Sciences University of Bologna  Ravenna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alice","family":"Ferrari","sequence":"additional","affiliation":[{"name":"Department of Biological, Geological and Environmental Sciences University of Bologna  Ravenna Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,1,29]]},"reference":[{"key":"e_1_2_4_2_1","volume-title":"PERMANOVA + for PRIMER: Guide to software and statistical methods","author":"Anderson M. 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