Barathronus affinis Brauer, 1906

Nielsen, Jørgen G., 2019, Revision of the circumglobal genus Barathronus (Ophidiiformes, Bythitidae) with a new species from the eastern North Atlantic Ocean, Zootaxa 4679 (2), pp. 231-256 : 234

publication ID	https://doi.org/10.11646/zootaxa.4679.2.2
publication LSID	lsid:zoobank.org:pub:A3A1CEE3-DA6D-4CF8-B529-7200B987C51F
DOI	https://doi.org/10.5281/zenodo.3797803
persistent identifier	https://treatment.plazi.org/id/0A6687ED-8B28-D171-FF0B-FF673E97FCD2
treatment provided by	Plazi (2020-04-28 07:09:10, last updated 2024-11-29 12:58:43)
scientific name	Barathronus affinis Brauer, 1906
status

Treatment

Barathronus affinis Brauer, 1906 View in CoL

Table 1. Figs. 2–4 View FIGURE 2 View FIGURE 3 View FIGURE 4

Barathronus affinis Brauer, 1906: 306 View in CoL (type locality: 1°57’S, 73°19’1’’E).

Barathronus affinis: Brauer 1908: 161 View in CoL ; Munk 1966: 37; Nielsen et al. 1999: 138.

Material examined ( 1 specimen, SL 47 mm). Holotype: ZMB 17700 (SL 47 mm, female), Chagos Archipelago, Indian Ocean, 1°57’S, 73°19.1’ E, RV Valdivia, st. 220, bottom trawl, 2919 m, 21 Feb.1899. GoogleMaps

Diagnosis. Barathronus affinis differs from the other four Barathronus species with a transparent peritoneum by the following combination of characters: Two fangs on vomer, ventral flexure of anteriormost vertebrae, long rakers on anterior gill arch 20, dorsal-fin rays 77, anal-fin rays 67, pectoral-fin rays 22, precaudal vertebrae 34, total vertebrae 78. Except for black lenses the preserved specimen is uniformly white-yellowish. Otoliths dissolved.

Description. Only the holotype is known. See the detailed descriptions in Brauer (1906: 306) and Nielsen (1969: 48). The principal meristic and morphometric characters are shown in Table 1.

Comparisons. Barathronus affinis seems most similar to B. linsi but differs by having fewer fangs on vomer (2 vs 8) and fewer long gill rakers (20 vs 25).

Distribution ( Fig.2 View FIGURE 2 ). Caught in a bottom trawl at 2919 m off the Chagos Archipelago, Indian Ocean.

References

Brauer, A. (1906) Die Tiefsee-Fische. I. Systematischer Teil. Deutsche Tiefsee-Expedition Valdivia , 15, 1 - 432.

Brauer, A. (1908) Die Tiefsee-Fische. II. Anatomischer Teil. Deutsche Tiefsee-Expedition Valdivia , 15, 1 - 266.

Munk, O. (1966) Ocular degeneration of some deep-sea teleosts. Dana Report, No. 70, 1 - 62.

Nielsen, J. G. (1969) Systematics and Biology of the Aphyonidae (Pisces, Ophidioidea). Galathea Report, 10, 1 - 89.

Nielsen, J. G., Cohen, D. M., Markle, D. F. & Robins, C. R. (1999) FAO species catalogue. Vol. 18. Ophidiiform fishes of the world (Order Ophidiiformes). An annotated and illustrated catalogue of pearlfishes, cusk-eels, brotulas and other ophidiiform fishes known to date. FAO Fisheries Synopsis. No. 125. Vol. 18. FAO, Rome, 178 pp.