Barathronus pacificus Nielsen & Eagle, 1974

Nielsen, Jørgen G., Pogonoski, John J. & Appleyard, Sharon A., 2019, Aphyonid-clade species of Australia (Teleostei, Bythitidae) with four species new to Australian waters and a new species of Barathronus, Zootaxa 4564 (2), pp. 554-572 : 565-566

publication ID

https://doi.org/ 10.11646/zootaxa.4564.2.12

publication LSID

lsid:zoobank.org:pub:DC307771-D3DB-46DE-891F-CC0EAF9BB5A6

DOI

https://doi.org/10.5281/zenodo.5924638

persistent identifier

https://treatment.plazi.org/id/03C487AB-FFAD-031C-CAD7-FCD4FE1CC74F

treatment provided by

Plazi (2019-03-10 07:04:36, last updated 2024-11-27 00:44:28)

scientific name

Barathronus pacificus Nielsen & Eagle, 1974
status

 

Barathronus pacificus Nielsen & Eagle, 1974 View in CoL

Table 1, Figs. 1 View FIGURE 1 , 9–10 View FIGURE 9 View FIGURE 10

Barathronus pacificus Nielsen & Eagle, 1974: 1067 View in CoL (type locality: 44°41.1’N, 133°24.1’W).

Barathronus pacificus: Nielsen et al. 1999: 139 View in CoL .

Material examined. (2 specimens, 86–95 mm SL): CSIRO H 8092-03, male, 86 mm SL, GAB, SA, 35°42.95’S, 131°39.38’E, RV Investigator , st. IN2017_C01/178, beam trawl, 3817–3950 m, 16 Apr. 2017. CSIRO H 8093-01 View Materials (GenBank Accession MH 491987 View Materials ; head badly damaged during capture), male, 95 mm SL, GAB, SA, 35°48.86’S, 131°42.16’E, RV Investigator , st. IN2017_C01/179, beam trawl, 4618–4750 m, 17 Apr. 2017 GoogleMaps .

Size. Largest known specimen is a ripe female 140 mm SL.

Diagnosis. Barathronus pacificus differs from the other nine Barathronus species by the following combination of characters: Dorsal fin rays 67–80, anal fin rays 61–69, pectoral fin rays 25–27, precaudal vertebrae 37–39, total vertebrae 82–89, anterior gill arch with 28–35 long rakers, 6–8 fangs on vomer, peritoneum transparent, no ventral flexure of anteriormost vertebrae and a pair of small claspers at basis of penis.

Distribution ( Fig. 1 View FIGURE 1 ). Six earlier known specimens from nearby localities in the NE Pacific at 3334–3860 m, from a 42 mm SL juvenile from the Tasman Sea and now from two GAB stations in close proximity at 3817–4750 m.

Remarks. The present two specimens are compared to the six earlier known specimens, including the type material from the Northeast Pacific. Table 1 shows just a few minor differences between the specimens from the two areas. Also included in the table is a 42 mm SL pelagic juvenile of B. pacificus recorded by Okiyama & Kato (1997) from the Tasman Sea between Lord Howe and Norfolk Islands (30°00’S, 163°00’E) which was not part of the Australian Exclusive Economic Zone in 1997. It was therefore not included by Bray et al. (2015) in their summary of the Aphyonidae .

Bray, D. J., Paxton, J. R., Gates, J. E & Hoese, D. F. (2015) Aphyonidae. Australian Faunal Directory. Australian Biological Resources Study, Canberra. Available from: https: // biodiversity. org. au / afd / taxa / APHYONIDAE (accessed 27 Aug 2018)

Nielsen, J. G. & Eagle, R. J. (1974) Descriptions of a New Species of Barathronus (Pisces, Aphyonidae) and Four Specimens of Sciadonus sp. from the Eastern Pacific. Journal Fisheries Research Board Canada, 31 (6), 1067 - 1072. https: // doi. org / 10.1139 / f 74 - 121

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. Rome, FAO. 1999. 178 pp.

Okiyama, M. & Kato, H. (1997) A pelagic juvenile of Barathronus pacificus (Ophidiiformes: Aphyonidea) from the Southwest Pacific with notes on its metamorphosis. Ichthyological Research, 44 (2), 222 - 226. https: // doi. org / 10.1007 / BF 02678701

Gallery Image

FIGURE 1. Records of aphyonid-clade species in Australian waters including the non-Australian paratypes of Barathronus algrahami n. sp. Some symbols represent more than one specimen (Image © NASA, TerraMetrics, Google Earth).

Gallery Image

FIGURE 9. Barathronus pacificus, OS 12519, 96 mm SL, female (37°43.2’N, 127°28.9’W) (Image: Marcus Krag).

Gallery Image

FIGURE 10. Right otolith from Barathronus pacificus, CSIRO H 8093-01, 95 mm SL: A—inner face, B—ventral view.

CSIRO

Australian National Fish Collection

MH

Naturhistorisches Museum, Basel

GAB

National Museum, Monuments, and Art Gallery

SA

Museum national d'Histoire Naturelle, Laboratiore de Paleontologie

RV

Collection of Leptospira Strains

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Ophidiiformes

Family

Aphyonidae

Genus

Barathronus