FN Archimer Export Format PT J TI A true caudal fin or not? New insights in the evolution of the gadiform caudal fin BT AF Moritz, Timo Walter, Jacqueline Grunow, Bianka Thieme, Philipp AS 1:1,2;2:2;3:3;4:1,4; FF 1:;2:;3:;4:; C1 Deutsches Meeresmuseum , Katharinenberg 14–20, 18439 Stralsund , Germany Institute of Biological Sciences, University of Rostock , Albert-Einstein-Straße 3, 18059 Rostock , Germany Research Institute for Farm Animal Biology (FBN), Fish Growth Physiology , 18196 Dummerstorf , Germany MARBEC, Université de Montpellier, IRD , Ifremer, CNRS, cc093, Place E. Bataillon, 34095 Montpellier Cedex 05 , France C2 DEUTSCHES MEERESMUSEUM, GERMANY UNIV ROSTOCK, GERMANY FBN, GERMANY UNIV MONTPELLIER, FRANCE UM MARBEC IN WOS Cotutelle UMR copubli-europe IF 2.8 TC 0 UR https://archimer.ifremer.fr/doc/00843/95445/103259.pdf LA English DT Article DE ;Homology;morphology;ontogeny;osteology;Paracanthopterygii AB The distinctive caudal-fin skeleton of gadiforms has puzzled scientists for a long time, because of its many differences in comparison to other teleosts. Contradicting hypotheses interpreted this structure as (i) a highly derived teleostean caudal fin, (ii) a new formation with parts from the caudal, dorsal and anal fins, a so called pseudocaudal, or (iii) a complete evolutionary novelty, a so called neocaudal. To shed light on to this issue, the caudal-fin ontogeny of Lota lota was studied in detail. It differs from the development in non-gadiform teleostean taxa, e.g. by absence of a distinct and early notochord flexion. However, there are also many similarities with other teleosts, e.g. the caudal fin develops before the dorsal and anal fins. Furthermore, the morphology of adult caudal fins of all major gadiform families were studied and reviewed. Our results, in combination with the latest molecular phylogenies, allowed us to discuss the evolution of the gadiform caudal fin and resolve the origin of this highly debated character complex. Although their caudal-fin skeleton shows several derived apomorphies, the gadiform caudal fin is homologous to the caudal fins of other teleosts, without principal inclusion of dorsal- or anal-fin elements. PY 2023 PD SEP SO Zoological Journal Of The Linnean Society SN 0024-4082 PU Oxford University Press (OUP) VL 199 IS 1 UT 001004968100001 BP 26 EP 44 DI 10.1093/zoolinnean/zlad017 ID 95445 ER EF