{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,24]],"date-time":"2025-09-24T10:33:30Z","timestamp":1758710010081},"reference-count":110,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2007,9,27]],"date-time":"2007-09-27T00:00:00Z","timestamp":1190851200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Morphology"],"published-print":{"date-parts":[[2008,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The perciform notothenioid fish <jats:italic>Eleginops maclovinus<\/jats:italic>, representing the monotypic family Eleginopidae, has a non\u2010Antarctic distribution in the Falkland Islands and southern South America. It is the sister group of the five families and 103 species of Antarctic notothenioids that dominate the cold shelf waters of Antarctica. <jats:italic>Eleginops<\/jats:italic> is the ideal subject for documenting the ancestral morphology of nervous and sensory systems that have not had historical exposure to the unusual Antarctic thermal and light regimes, and for comparing these systems with those of the phyletically derived Antarctic species. We present a detailed description of the brain and cranial nerves of <jats:italic>Eleginops<\/jats:italic> and ask how does the neural and sensory morphology of this non\u2010Antarctic notothenioid differ from that seen in the phyletically derived Antarctic notothenioids? The brain of <jats:italic>Eleginops<\/jats:italic> is similar to those of visually oriented temperate and tropical perciforms. The tectum is smaller but it has well\u2010developed olfactory and mechanoreceptive lateral line areas and a large, caudally projecting corpus cerebellum. Eye diameter is about twofold smaller in <jats:italic>Eleginops<\/jats:italic> than in many Antarctic species. <jats:italic>Eleginops<\/jats:italic> has a duplex (rod and cone) retina with single and occasional twin cones conspicuous centrally. Ocular vascular structures include a large choroid rete mirabile and a small lentiform body; a falciform process and hyaloid arteries are absent. The olfactory rosette is oval with 50\u201355 lamellae, a large number for notothenioids. The inconspicuous bony canals of the cephalic lateral line system are simple with membranous secondary branches that lack neuromasts. In Antarctic species, the corpus cerebellum is the most variable brain region, ranging in size from large and caudally projecting to small and round. \u201cStalked\u201d brains showing reduction in the size of the telencephalon, tectum, and corpus cerebellum are present in the deep\u2010living artedidraconid <jats:italic>Dolloidraco longedorsalis<\/jats:italic> and in most of the deep\u2010living members of the Bathydraconini. Eye diameter is generally larger in Antarctic species but there is a phylogenetic loss of cellularity in the retina, including cone photoreceptors. Some deep\u2010living Antarctic species have lost most of their cones. Mechanosensation is expanded in some species, most notably the nototheniid <jats:italic>Pleuragramma antarcticum<\/jats:italic>, the artedidraconid genera <jats:italic>Dolloidraco<\/jats:italic> and <jats:italic>Pogonophryne<\/jats:italic>, and the deep living members of the bathydraconid tribe Bathydraconini. Reduction in retinal cellularity, expansion of mechanoreception, and stalking are the most noteworthy departures from the morphology seen in <jats:italic>Eleginops<\/jats:italic>. These features reflect a modest depth or deep\u2010sea effect, and they are not uniquely \u201cAntarctic\u201d attributes. Thus, at the level of organ system morphology, perciform brain and sensory systems are suitable for conditions on the Antarctic shelf, with only minor alterations in structure in directions exhibited by other fish groups inhabiting deep water. Notothenioids retain a relative balance among their array of senses that reflects their heritage as inshore perciforms. J. Morphol., 2008. \u00a9 2007 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/jmor.10571","type":"journal-article","created":{"date-parts":[[2007,9,27]],"date-time":"2007-09-27T16:50:35Z","timestamp":1190911835000},"page":"84-103","source":"Crossref","is-referenced-by-count":22,"title":["Brain and sense organ anatomy and histology of the Falkland Islands mullet, <i>Eleginops maclovinus<\/i> (Eleginopidae), the sister group of the Antarctic notothenioid fishes (Perciformes: Notothenioidei)"],"prefix":"10.1002","volume":"269","author":[{"given":"Joseph T.","family":"Eastman","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael J.","family":"Lannoo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2007,9,27]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511759376"},{"key":"e_1_2_1_3_1","first-page":"1","article-title":"Genera and subfamilies of the family Nototheniidae (Pisces. 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