First Record of a Rare Eel Dysomma bucephalus (Synaphobranchidae) in the Arabian Sea

A saw-toothed eel † Serrivomer glehni sp. nov. from the Miocene of Sakhalin Island, north-western Pacific

“…In 20 specimens with an estimated 318–516 mm TL, this row is preserved completely or nearly so, and contains from 18–44 teeth. The greater number of the posterior vomerine teeth in large fishes has been noted in some modern species (Karmovskaya, 1996; Tighe, 1989), but in this fossil such a trend is not observed (R 2 = 0.0635). The ratio of the tooth height to its base length varies between 1.9 and 4.7 (average 3.0, by 59 measurements), which is characteristic for species with the “longidentatus” type of vomerine dentition (Roule & Bertin, 1929).…”

“…The closest to the locality of this fossil were recorded S. sector from the Pacific side of the southern Honshu, about 33°N (Hatooka, 2002), and S . lanceolatoides from the Pacific side of Hokkaido, about 41°N (Karmovskaya, 1996). Thus, in the Miocene, saw-toothed eels were distributed, at least, 6° latitude northward of their present range.…”

“…They are widely distributed in tropical and temperate waters of the Atlantic, Pacific and Indian oceans (Bauchot, 1959; Tighe, 1989). The northernmost limits of their range reach 60°N in the Atlantic (Saldanha & Karmovskaya, 1990), and 51°N and 41°N in the eastern and western Pacific, respectively (Karmovskaya, 1996; Mecklenburg et al, 2002). Serrivomeridae are among the most common midwater eels (Tighe, 1989).…”