A new species of scorpionfish, Ebosia vespertina (Scorpaenidae: Pteroinae), from the southwestern Indian Ocean

作者：Matsunuma Mizuki^*; Motomura Hiroyuki

来源：Ichthyological Research, 2016, 63(1): 110-120.

DOI：10.1007/s10228-015-0479-2

• South Africa
• Mozambique
• Madagascar
• Sexual dimorphism
• Ontogenetic change

A new species of scorpaenid fish, Ebosia vespertina sp. nov., is described on the basis of 19 specimens from off Mozambique, South Africa, and Madagascar, southwestern Indian Ocean. The new species is most similar to Ebosia falcata and Ebosia saya, known from the northern and eastern Indian Ocean and Saya de Malha Bank, respectively, in having usually 8 anal-fin soft rays, usually more than 17 pectoral-fin rays, and the elongated parietal spine in males narrow and strongly curved posterodorsally. However, E. vespertina can be distinguished from the two latter species by the following combination of characters: pectoral-fin rays 17-18 (modally 18); scale rows above the lateral line 4-6 (5); scale rows between the last dorsal-fin spine base and lateral line 4-5 (5); scale rows between the sixth dorsal-fin spine base and lateral line 4-5 (5); postorbital length 17.4-20.3 (mean 18.7) % of standard length (SL); longest pectoral-fin ray length 54.6-73.9 (65.1) % of SL; longest pelvic-fin soft ray length 32.4-44.0 (37.6) % of SL. The remaining congener, Ebosia bleekeri, known from the western Pacific Ocean, usually has 7 anal-fin soft rays and 16 pectoral-fin rays, and the elongated parietal spine in males relatively broad and not so strongly curved.

• 出版日期2016-1