Search

Here we consider the role of depth as a driver of evolution in a genus of deep-sea fishes. We provide a phylogeny for the genus Coryphaenoides (Gadiformes: Macrouridae) that represents the breadth of habitat use and distributions for these species. In our consensus phylogeny species found at abyssal depths (> 4000 m) form a well-supported lineage, which interestingly also includes two non-abyssal species, C. striaturus and C. murrayi, diverging from the basal node of that lineage. Biogeographic analyses suggest the genus may have originated in the Southern and Pacific Oceans where contemporary species diversity is highest. The abyssal lineage seems to have arisen secondarily and likely originated in the Southern/Pacific Oceans but diversification of this lineage occurred in the Northern Atlantic Ocean. All abyssal species are found in the North Atlantic with the exception of C. yaquinae in the North Pacific and C. filicauda in the Southern Oceans. Abyssal species tend to have broad depth ranges and wide distributions, indicating that the stability of the deep oceans and the ability to live across wide depths may promote population connectivity and facilitate large ranges. We also confirm that morphologically defined subgenera do not agree with our phylogeny and that the Giant grenadier (formally Albatrossia pectoralis) belongs to Coryphaenoides, indicating that a taxonomic revision of the genus is needed. We discuss the implications of our findings for understanding the radiation and diversification of this genus, and the likely role of adaptation to the abyss.

En 1998 y 1999 se llevó a cabo la expedición INVEMAR MACROFAUNA I a lo largo del Caribe colombiano desde Punta Estrella en La Guajira hasta Cabo Tiburón en límites con Panamá. Se hicieron 80 arrastres entre los 200 y 500 m de profundidad en la porción superior del talud continental, por medio de una red para faenas de arrastre demersal tipo semibalón. Se listan 17 nuevos registros de peces para el Caribe colombiano de los órdenes Myctophiformes, Polymixiiformes, Gadiformes, Ophidiiformes y Lophiiformes. Diplacanthopoma brachysoma es primer registro para el Caribe y Neoscopelus microchir, Chaunax pictus y Malthopsis gnoma lo son para el Caribe sur. Neobythites gilli incluye otras dos especies que habían sido recientemente validadas, N. ocellatus y N. monocellatus. Between 1998 and 1999, the expedition INVEMARMACROFAUNA I was conducted through the Colombian Caribbean slope, from Punta Estrella (Guajira) to Cabo Tiburón, near the Panamá border. Eighty trawls were performed between 200 and 500 m depth, with a semi balloon net. Seventeen first records of fishes for the Colombian Caribbean of the orders Myctophiformes, Polymixiiformes, Gadiformes, Ophidiiformes, and Lophiiformes are listed here. Diplacanthopoma brachysoma is a first record for the Caribbean and Neoscopelus microchir, Chaunax pictus and Malthopsis gnoma are also first records for the southern Caribbean. Neobythites gilli includes other two species that were recently validated, N. ocellatus y N. monocellatus.

Con el fin de obtener un mejor conocimiento de la ictiofauna en la parte superior del talud continental del Caribe colombiano se realizó la expedición INVEMAR MACROFAUNA I, en la cual se efectuaron 80 arrastres durante cinco cruceros entre octubre de 1998 y abril de 1999, frente a las ecorregiones Guajira, Palomino, Tayrona, Magdalena, Morrosquillo y Darién, entre 200 y 525 m de Profundidad con una red de arrastre tipo “semi-ballon”. En esta publicación se registran por primera vez 19 especies para Colombia de los órdenes Albuliformes, Anguilliformes, Osmeriformes, Stomiiformes, Ateleopodiformes, Aulopiformes y Pleuronectiformes y se ratifica la presencia de dos especies. Se presenta un primer registro para el Caribe, tres primeros registros para el Caribe Sur y 15 primeros registros para el Caribe colombiano. Con los datos colectados en cada estación se amplía el ámbito batimétrico de dos especies y se aumenta la Talla máxima de otra especie. Five cruises were made between October 1998 and April 1999 in order to improve the knowledge about the fish fauna of the upper continental slope in the Colombian Caribbean, as a part of the project “INVEMAR MACROFAUNA I”. A total of 80 trawls were made during five cruises between October of 1998 and April of 1999, distributed along of the ecoregions of Guajira, Palomino, Tayrona, Magdalena, Morrosquillo, and Darién, along the continental slope of the Colombian Caribbean between 200 and 525 m depth using a semi-balloon trawling net. Nineteen species of the orders Albuliformes, Anguilliformes, Osmeriformes, Stomiiformes, Ateleopodiformes, Aulopiformes, and Pleuronectiformes are reported for the first time from Colombian waters, and the presence of two others is ratified. The results show a first report for the Caribbean, three first reports for the Southern Caribbean, and 15 first reports for the Colombian Caribbean. The data extend the depth range of two species and the maximum size of another one.