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Hamburg, Germany

Nielsen J.G.,Copenhagen University | Schwarzhans W.,Ahrensburger Weg 103 D
Beagle | Year: 2011

A new genus and species of bathyal bythitid fish (Teleostei: Ophidiiformes) is described based on a single specimen caught at a depth of 392 m in the Timor Sea off the coast of northwestern Australia. Timorichthys disjunctus gen. nov., sp. nov. differs from all other bythitid genera by the position of the anus midway between the tip of the snout and origin of the anal fin. The joined vertical fins and the type of intromittant organ furthermore place the new genus in the subfamily Bythitinae.

Nielsen J.G.,Copenhagen University | Schwarzhans W.,Ahrensburger Weg 103 D | Cohen D.M.,100 Thorndale Dr.
Zootaxa | Year: 2012

Material of three similar and probably related genera of the viviparous ophidiiform family, Bythitidae, has been studied. The monotypic Hastatobythites is only known from the original two specimens; re-examination of the paratype and information of the holotype clearly demonstrates the validity of the genus. The revision of Saccogaster (Cohen & Nielsen 1972) was based on 15 specimens. Since then 29 additional specimens have been collected representing 11 species, three of which are here described: S. brayae, horrida and nikoliviae. Three of the 11 Saccogaster species, S. melanomycter, S. normae and S. rhamphidognatha, differ so much from the remaining eight that a new genus, Parasaccogaster, is described. The main diagnostic characters used for the three genera are: A pair of spines on frontal plate behind eyes, spines on snout, length of gill filaments on anterior arch, number and length of developed gill rakers, size of gill opening, thickness of skin, head pores, otolith morphology, color marks on head, neuromasts on head and head morphometrics, fin ray counts. Copyright © 2012, Magnolia Press.

A new genus, Robaloscion gen. nov., is described to include the Peruvian robalos: Sciaena wieneri Sauvage, 1883 and Sciaena starksi Evermann & Radcliffe, 1917, on the basis of all known specimens. The new genus is defined as a sciaenid with: a pair of horn-like appendages arising at the anterior extremity of the gas bladder; emarginate to lunate caudal fin; very elongate sagitta with a large, globose umbo on the outer face; small eye contained 10 to 17 times in head length. Sciaena starksi is treated as a junior synonym of S. wieneri based on examination of the type series of both species. Robaloscion wieneri is one of the largest sciaenids of the eastern Pacific, reaching a size of 1400 mm, and is distributed from northern Peru to northern Chile. © SFI.

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