Description of two new species of Santelmoa (Teleostei, Zoarcidae) from the Southern Ocean
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Detailed examination of eelpouts in collected material from the Gerlache Strait and the Bellingshausen Sea, during the Spanish Antarctic Expeditions Bentart 03 and Bentart 06, and from the Bransfield Strait, during the Danish Galathea 3 Expedition, at depths between 1,056 and 1,837 m, revealed two undescribed species of Santelmoa Matallanas 2010. Herein, Santelmoa fusca sp. nov. and Santelmoa antarctica sp. nov. are described on the basis of twelve specimens. Santelmoa fusca can be separated from all other Santelmoa species by the following characters: mouth terminal; two posterior nasal pores; lateral line double; two irregular rows of palatine teeth; dorsal fin rays 109–113; anal fin rays 88–94; vertebrae 27–29 + 87–91 = 114–118; two pyloric caeca well developed; scales reduced to tail; pelvic fins and vomerine teeth present. Santelmoa antarctica can be separated from all other Santelmoa species by the following characters: mouth subterminal; two posterior nasal pores; suborbital pores seven (6 + 1); lateral line double; single row of palatine teeth; supraoccipital dividing the posterior end of frontals; central radials notched; dorsal fin rays 109–112; anal fin rays 89–93; vertebrae 27 + 89–92 = 116–119; two pyloric caeca well developed; scales, ventral fins and vomerine teeth present. Santelmoa fusca and S. antarctica can readily be separated from each other by squamation (reduced to tail vs. on the tail and on the posterior part of body); suborbital pore pattern (6 + 0 vs. 6 + 1), as well as several morphometric characters. The relationships of the two new species with congeners are discussed.
KeywordsEelpouts Santelmoa fusca Santelmoa antarctica
We thank the scientific team, the captain, crew and UTM technicians of the R/V Hespérides for their help during the Bentart 03 and Bentart 06 cruises, on which many specimens were captured. Special thanks to José Castro “Córdoba” for his expertise in fishing with the traps and to Dr. Ignacio Olaso for helping onboard with the collection of type specimens. We are also grateful to Carmen Benito for the X-rays, Jordi Corbera for the illustrations, and Muriel, daughter of the first author, for the English correction of the draft manuscript. This manuscript also benefited from the constructive criticism by reviewers (Gento Shinohara and Mario la Mesa). The Bentart cruises were supported by the Spanish Antarctic Programme (CICYT), and the Galathea 3 Expedition was conducted under the auspices of the Danish Expedition Foundation. This study was supported by a grant from the Ministerio de Ciencia e Innovación, Spain: “Culminación del estudio taxonómico integrado de Zoárcidos (Teleostei, Perciformes) antárticos (CTM2011-1585-E)”, and a grant from the Danish National Research Foundation, “Evolution of Polar fishes”.
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