Neobythites stefanovi Nielsen & Uiblein, 1993

Uiblein, Franz & Nielsen, Jørgen G., 2018, Review of the steatiticus - species group of the cuskeel genus Neobythites (Ophidiidae) from the Indo-Pacific, with description of two new species, Zootaxa 4387 (1), pp. 157-173: 169-170

publication ID

https://doi.org/10.11646/zootaxa.4387.1.7

publication LSID

lsid:zoobank.org:pub:45B4B1FD-5DC6-4D13-9470-B729013E2D8E

persistent identifier

http://treatment.plazi.org/id/6570D216-FFFC-8F3F-FF69-E23A36905358

treatment provided by

Plazi

scientific name

Neobythites stefanovi Nielsen & Uiblein, 1993
status

 

Neobythites stefanovi Nielsen & Uiblein, 1993  

( Figures 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 , Tables 1–3)

Neobythites stefanovi Nielsen & Uiblein, 1993: 110   .

Neobythites stefanovi: Nielsen 1995   : page 15; Nielsen 2002: 86 (in part); Kannan et al. 2013: 1 (here tentatively referred to N. steatiticus   ).

Holotype. ZM MGU P18923 View Materials (male, 166 mm SL), Gulf of Aden, NW Indian Ocean, 14°48.8' N, 51°16.1' E, RV Dmitry Stefanov cr. 3, trawl 91, 245– 335 m depth; 5 Jan. 1989. GoogleMaps  

Paratypes (n = 25, 42–195+ mm SL). BMHN 1939.5. 24.1437 (female, 195+ mm SL), Gulf of Aden, 13°14.4' N, 46°14.2' E, RV John Murray, st. 35, otter trawl, 457–549 m depth, 16 Oct. 1933; SMF 26427 View Materials –29 (2 females, 2 males, and 4 unsexed; 42–122 mm SL), Gulf of Aden , 12°16' N, 44°09.5' E, RV Meteor, MeS-287, beam-trawl GoogleMaps   ; 472–479 m depth, 16 Mar. 1987; USNM 302930 View Materials , female, 179 + mm SL, Gulf of Aden, 11°10.6'N, 48°11.2'E, RV Beinta, cr. 19, haul 32, 351 GoogleMaps   384 m depth, 19 Feb. 1987; ZM MGU P-18924 (female, 139 mm SL), Gulf of Aden, 13°15.5' N, 46°14.3' E, RV Akademik Petrovsky cr. 14, st. 34, 250 GoogleMaps   300 m depth, 26 Sep. 1983; ZM MGU P-18925 (male, 130 mm SL), Gulf of Aden, 15°59.8' N, 52°23.9' E, RV Dmitry Stefanov cr.3, trawl 9, 80 GoogleMaps   110 m depth, 19 Nov. 1988; ZM MGU P-18926 (female, 162+ mm SL), Gulf of Aden 14°49.2' N, 50°35.1' E, RV Dmitry Stefanov, trawl 78, 375 m depth, 3 Feb. 1989; ZM MGU P-18927 (female, 168 mm SL), same data as holotype; ZM MGU P- 18928 (female, 180 mm SL), Gulf of Aden , 13°13.7' N, 45°41.8' E, RV Dmitry Stefanov, cr.5, trawl 48, 355 GoogleMaps   365 m depth, 22 Nov. 1989; ZM MGU P-18929 (female, 190 mm SL), and ZMUC P77841 View Materials (female, 198 mm SL), Gulf of Aden, 13°09' N, 45°41' E, RV Dmitry Stefanov, trawl 51 GoogleMaps   ; 460 m; 24 Nov. 1989; ZM MGU P-18930 (female and male, 165–179 mm SL), and ZMUC P77842 View Materials (male, 168 mm SL), Gulf of Aden , 13°25.1' N 47°14.S' E, RV Dmitry Stefanov, trawl 68, 367 m depth, 28 Nov. 1989; ZM MGU P 18931 View Materials (female, male, and unsexed, 130–172 mm SL), and ZMUC P77843 View Materials –44 (male and female, 163–166 mm SL), Gulf of Aden, RV Dmitry Stefanov, 1989.  

Non-types (n = 22, 29– 122 mm SL). SMF 26430 (female, 122 mm SL), Red Sea, 18°35.3' N, 39°03.5' E, RV Meteor, MeS-171, beam trawl, 434–469 m depth, 23 Feb. 1987; SMF 26431 and 26434 (3 unsexed, 45–94 mm SL), Red Sea, 19°18.2' N, 38°15.5' E, RV Meteor, MeS-194, beam trawl, 537–681 m depth, 28 Feb. 1987; SMF 26432 (2 unsexed, 75–84 mm SL), Red Sea, 22°05' N, 37°09.3' E, RV Meteor, MeS-96, beam trawl, 600 m depth, 9 Feb. 1987; SMF 26433 (2 unsexed, 44–99 mm SL), Red Sea, 19°44.5' N, 37°40.2' E, RV Meteor, MeS-148, beam trawl, 517–583 m depth, 20 Feb. 1987; SMF 26435 and 26440 (2 unsexed, 49– 31 mm SL), Red Sea, 21°28.97' N, 38°15.55' E, RV Valdivia   , st. 111 TA, closing trawl, 740–785 m depth, 12 Apr. 1979; SMF 26436 and 26441 (3 unsexed, 29–46 mm SL), Red Sea, 21°26.5' N, 38°38.3' E, RV Valdivia   , st. 121 TA, closing trawl, 779–801 m depth, 15 Apr. 1979; SMF 26437 and 26785 (2 unsexed, 63–115 mm SL), Red Sea, 20°94.9' N, 37°26.1' E; RV Sonne 35 TA, c1osing trawl, 490–588 m, 17 Oct. 1977; SMF 26438 (42 mm SL), Red Sea, 21°10.8' N, 37°34.0' E, RV Sonne 27 TA, closing trawl, 733–757 m depth, 16 Oct. 1977; SMF 26439 (38 mm SL), Red Sea, 21°12.0' N, 37°26.8' E, RV Sonne, 25 TA, closing trawl, 724–747 m depth, 15 Oct. 1977; SMF 26442 (5 unsexed, 29–42 mm SL), Red Sea, 21°33' N, 38°21' E, RV Valdivia   , 99 TA, closing trawl, 753–804 m depth, 9 Apr. 1979.

Diagnosis. No spines on hind margin of preopercle; dorsal fin-rays 89–95; anal-fin rays 73–78; pectoral finrays 24–26; precaudal vertebrae 12; total vertebrae 52–56; pseudobranchial filaments 2–6; long gill rakers on anterior arch 10–13; head length 23.0–27.5 % SL; pelvic-fin length 14.5–20.5 % SL, pelvic fins not reaching anus; orbit length 5.4–6.9 % SL, 21.5–27.5 % head length, and 1.7–2.3 times in upper-jaw length; longest gill filament 1.4–3.7 % SL and 5.4–16.0 % head length; ocellus spot placed well behind a vertical line through anus, the ocellusspot distance being 45.5–56 % SL, and the spot covering 8–12 dorsal-fin rays; dorsal and anal fins with dark margins throughout; no vertical bars on body; otolith length 4.6–5.2 % SL, sulcus length 3.4–4.1 % SL, and ostium height 20.0–28.5 % sulcus length.

Distribution. Gulf of Aden, NW Indian Ocean, at 80-549 m depth and Red Sea, 434–804 m depth.

Remarks. Kannan et al. (2013) reported on two specimens of N. stefanovi   from Gulf of Manar, Tamil Nadu (NW Indian Ocean). After inspection of the photo and some of the data provided by Kannan et al. (2013), we assume that these specimens should be treated as tentatively referred to N. steatiticus   .

Uiblein (1995) reported considerable differences between the populations of the Red Sea and the Gulf of Aden based on quantitative studies of meristic, morphometric and ocellus characters. Those differences were however only statistically detectable and did not support the erection of a distinct taxon in the Red Sea. We have reconsidered these earlier findings when examining the differentiation degree among the three rather similar species N. gloriae   n. sp., N. steatiticus   , and N. stefanovi   . While these species can be well separated by five diagnostic characters (singly or in combination), the two N. stefanovi   populations clearly overlap with each other in those as well as in all other characters studied ( Figure 3 View FIGURE 3 , Tables 2–3).

SMF

Forschungsinstitut und Natur-Museum Senckenberg

ZMUC

Zoological Museum, University of Copenhagen

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Ophidiiformes

Family

Ophidiidae

Genus

Neobythites

Loc

Neobythites stefanovi Nielsen & Uiblein, 1993

Uiblein, Franz & Nielsen, Jørgen G. 2018
2018
Loc

Neobythites stefanovi Nielsen & Uiblein, 1993 : 110

Nielsen & Uiblein, 1993 : 110
Loc

Neobythites stefanovi: Nielsen 1995

Nielsen 2002 : 86
Kannan et al. 2013 : 1