New dextral flounder Samariscus hexaradiatus sp. nov. (Samaridae, Pleuronectiformes) from the Solomon Islands, South-West Pacific Ocean

Díaz de Astarloa J.M., Causse R., Pruvost P.

Date de parution: octobre 2013
Volume: 37
Number: 4
Pagination: 241–246
Editeur: Société Française d'Ichtyologie
doi: https://doi.org/10.26028/cybium/2013-374-002
Résumé

A new right eyed flounder, Samariscus hexaradiatus, is described on the basis of two specimens collected from the Solomon Islands, southwestern Pacific Ocean, at depths of 135-325 m. The new species is distinguished from other species of the genus by the following characters: 6 pectoral-fin rays; 82 dorsal-fin rays and 60-62 anal-fin rays; 9 abdominal vertebrae and 32 caudal vertebrae; presence of ctenoid scales on the interorbital space and high number (74-75) of lateral-line scales. Ocular side of body light brown with four and three distinguishable horseshoe-shaped spots along margins of both dorsal and ventral profiles, respectively. Two indistinct dusky blotches on the lateral line, one situated before the distal end part of the pectoral fin when flattened posteriorly, the other placed near the last one-third of the body length. Two distinct black spots placed on the upper and lower margins of the caudal peduncle at the posterior end of the dorsal and anal fins, respectively. Pectoral fin with dark pigmentation. Dorsal and anal fins dusky brown near the proximal and distal ends of the fin-rays, respectively, and with distinct series of small dusky spots on the medial parts the fin-rays.

Mots-clés: New species - Pleuronectiformes - Samaridae - Samariscus hexaradiatus sp. nov. - Solomon Islands
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