Published October 2, 2019 | Version v1
Taxonomic treatment Open

Barathronus bruuni Nielsen 1969

Description

Barathronus bruuni Nielsen, 1969

Table 1. Figs. 2, 9

Barathronus bruuni Nielsen, 1969: 51 (type locality: 29°45’S, 64°58’E).

Barathronus bruuni: Nielsen et al. 1999: 138.

Material examined (1 specimen, SL 39 mm). Holotype: USNM 202104 (SL 39 mm, female), SW Indian Ocean, 29°45’S, 64°58’E, RV Anton Bruun, cr. 6, st. 351 B, Isaacs-Kidd midwater trawl, about 1700 m (sounding 4825 m), 28 June 1964.

Diagnosis. Barathronus bruuni differs from the other five Barathronus species with pigmented peritoneum by the following combination of characters: dorsal-fin rays 81, anal-fin rays 73, pectoral-fin rays 25, long rakers on anterior gill arch 33, precaudal vertebrae 36, total vertebrae 86, no ventral flexure of anteriormost vertebrae, 3 fangs on vomer. A distinct brown streak in midline of body and a concentration of brown pigment between dorsal fin and nape. The rounded, 1 mm long otoliths seen through of the skull.

Description. Only the holotype is known. For a detailed description see Nielsen (1969: 51). The principal meristic and morphometric characters are shown in Table 1.

Comparisons. Barathronus bruuni seems most similar to B. maculatus but differs by having more anal fin rays (73 vs 54–66), more vertebrae (86 vs 74–79) and origin of anal fin below dorsal fin ray no. 10 in B. bruuni and below nos. 15–23 in B. maculatus.

Distribution (Fig. 2). Caught pelagically between 1700 m and the surface in the southwestern Indian Ocean.

Notes

Published as part of Nielsen, Jørgen G., 2019, Revision of the circumglobal genus Barathronus (Ophidiiformes, Bythitidae) with a new species from the eastern North Atlantic Ocean, pp. 231-256 in Zootaxa 4679 (2) on page 239, DOI: 10.11646/zootaxa.4679.2.2, http://zenodo.org/record/3772453

Files

Files (2.0 kB)

Name Size Download all
md5:9aa883a72cee1866b1cd855fe82fa5fe
2.0 kB Download

System files (15.4 kB)

Name Size Download all
md5:b70c6b9a39c05dddbacb8c6b450f4ec6
15.4 kB Download

Linked records

Additional details

Biodiversity

Collection code
RV
Event date
1964-06-28
Family
Aphyonidae
Genus
Barathronus
Kingdom
Animalia
Material sample ID
USNM 202104
Order
Ophidiiformes
Phylum
Chordata
Scientific name authorship
Nielsen
Species
bruuni
Taxon rank
species
Type status
holotype
Verbatim event date
1964-06-28
Taxonomic concept label
Barathronus bruuni Nielsen, 1969 sec. Nielsen, 2019

References

  • 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.