Barathronus diaphanus 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 : 241-243

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.3797793
persistent identifier	https://treatment.plazi.org/id/0A6687ED-8B21-D17E-FF0B-FF673AB8FE29
treatment provided by	Plazi
scientific name	Barathronus diaphanus Brauer, 1906
status

Treatment

Barathronus diaphanus Brauer, 1906 View in CoL

Table 1. Figs. 2 View FIGURE 2 , 10–12 View FIGURE 10 View FIGURE 11 View FIGURE 12

Barathronus diaphanus Brauer, 1906: 305 View in CoL (type locality: 2°58.8’N, 47°6.1’E).

Barathronus diaphanus: Weber 1913: 551 View in CoL ; Beaufort & Chapman 1951: 406; Nielsen 1969: 44; Nielsen et al. 1999: 138; Nielsen & Møller 2008: 39.

Material examined ( 24 specimens, SL 54-130 mm). Holotype: ZMB 17699 (SL 117, female), off Somalia, 2°58.8’N, 47°6.1’E, RV Valdivia, st. 259, trawl, 1289 m, 28 Mar. 1899. Non-types: ZMA 104.467 View Materials (SL 59 mm, female), off Timor, 10°48.6’S, 123°23.1’E, RV Siboga, st. 300, trawl, 918 m, 30 Jan. 1900. ZSI 1050/1 (SL 65 and 70 mm, 2 females), Andaman Sea, 13°29’30’’N, 95°29’E, RV Investigator, St. 310, Agassiz trawl, 1756 m, 5 Nov. 1902. HKFRS- uncatalogued (SL 92 mm, male), South China Sea, 19°40’N, 115°30’E, RV Cape St. Mary, cr. 1/64, st. 26, Agassiz trawl, 732–796 m, 7 Jan. 1964. MNHN 2019-0035 About MNHN (SL 113 mm, female), off Northwest Madagascar, 12°27’S, 48°10’E, RV Vauban, trawl 22, 680– 700 m, 19 Jan. 1972. MNHN 2019—0031 About MNHN - 34 About MNHN (4 spms., SL 100–110 mm, 4 females), off Southeast Madagascar, 22°16.9’S, 42°56’E, RV Vauban, Crosnier coll., trawl 109, 1500 m, 30 Nov. 1973. MNHN 2019-0036 About MNHN (SL 115 mm, male), off Northwest Madagascar, 13°04’S, 47°51.5’E, RV Vauban, trawl 134, 1865– 2030 m, 21 Jan. 1975. MNHN 2002-3134 About MNHN (SL 85 mm, male), Coral Sea, 19°54’S, 158°37’58.8’’E, RV Coriolis/Musorstom 5, dw337, 412– 430 m, 15 Oct. 1986. MNHN 1995-0913 About MNHN (SL 95 mm, female), off Vanuatu, 18°51’S, 168°55’1.2’’E, RV Alis/Musorstom 8, cp1007, 720– 830 m, 25 Sep. 1994. MNHN 1995-0919 About MNHN (SL 54 mm, male), off Vanuatu, 15°48’S, 167°24’E, RV Alis/Musorstom 8, cp1074, 775– 798 m, 4 Oct. 1994. MNHN 1995- 0914 About MNHN (SL 96 and 104 mm, 2 males), off Vanuatu, 14°49’1.2’’S, 167°15’E, RV Alis / Musorstom 8, cp1110, 1360 m, 8 Oct. 1994. MNHN 2004-0924 About MNHN (SL 72 mm, female), off Fiji Is., 17°09’S, 177°55’58.8’’E, RV Alis / Musorstom 10, cp1331, 694– 703 m, 8 Aug. 1998. MNHN 2004-0925 About MNHN (SL 88 mm, male), off Fiji Is., 17°03’S, 177°46’58.8’’E, RV Alis / Musorstom 10, cp1335, 729– 753 m, 9 Aug. 1998. MNHN 2015-0052 About MNHN (SL 112 mm, male), Tonga, 23°28’S, 176°22’W, RV Alis / Bordau 2, st. cp 1625, 824 m, 19 June 2001. MNHN 2006-0699 About MNHN (SL 65 mm, male), Solomon Isls., 9°0’21.6’’S, 159°4’15.6’’E, RV Alis / Salomon 2, cp2175, 579– 585 m, 21 Oct. 2004. ZMUC P 771585 View Materials (SL 96 mm, female), Solomon Sea , 13°45’S, 156°41’E, RV Galathea 3, st. 0611219-05, otter trawl, 2255–2283 m, 19 Dec. 2006, ZMUC P 771586 View Materials (SL 112 mm, female), Solomon Sea , 7°25’S, 155°44.7’E, RV Galathea 3, st. 061227-01, 1.2 m Agassiz trawl, 1012–1094 m, 27 Dec. 2006. NSMT-P 111903 (SL 130 mm, female), Ryukyu Is., 25°19.992’N, 125°24.912’E to 25°20.354’N, 125°26.659’E, RV Tansei-maru , beam trawl, 1927– 1901 m, 30 Nov. 2012. MNHN 2016-0166 About MNHN (SL 110+ mm, female), Mahajanga, Madagascar, 15°31’S, 45°42’E, MOZ1 _CP4, beam trawl, 806 m, 9 Oct. 2014. GoogleMaps

Diagnosis. Barathronus diaphanus differs from the other five species of the genus with dark-pigmented peritoneum by the following combination of characters: dorsal-fin rays 58–73, anal-fin rays 48–61, long rakers on anterior gill arch 25–35, precaudal vertebrae 30–35, total vertebrae 66–75, vomer with 1–5 fangs, paired bulbs at basis of penis not developed, no ventral flexure of anteriormost vertebrae. Ripe males with rather thick penis. Newly-caught specimens bright red, preserved specimens light-brownish with dark-blue peritoneum. Otolith ( Fig. 11 View FIGURE 11 ) similar to that of B. bicolor ( Fig. 8 View FIGURE 8 ).

Description. For a detailed description see Nielsen (1969: 44). The principal meristic and morphometric characters are shown in Table 1.

Comparisons. For a comparison to the very similar species, B. bicolor , see page 6.

Distribution ( Fig. 2 View FIGURE 2 ). From Madagascar to Japan and Tonga ls. at depths of 579–2030 m.