Barathronus multidens Nielsen, 1984

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 : 246-248

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.3797797

persistent identifier

https://treatment.plazi.org/id/0A6687ED-8B24-D163-FF0B-FCA63B3EFF25

treatment provided by

Plazi

scientific name

Barathronus multidens Nielsen, 1984
status

 

Barathronus multidens Nielsen, 1984 View in CoL

Table 2. Figs. 1 View FIGURE 1 , 18–20 View FIGURE 18 View FIGURE 19 View FIGURE 20

Barathronus multidens Nielsen, 1984a: 583 View in CoL (type locality: 32°54.6’N, 11°40.0’W).

Barathronus multidens: Nielsen et al. 1999: 139 View in CoL ; Evseenko et al. 2018.

Material examined (3 specimens, SL 45–83 mm): Holotype: BMNH 1983.2 .28.1 (SL 72 mm, male), off southern Morocco, 32°54.6’N, 11°40’W, RV Discovery , cr. 77, st. 8976, bottom trawl, 3610–3646 m, 5 Aug. 1976 GoogleMaps . Paratype: ZMUC P77712 (SL 83 mm ,, male), north of Bahamas, 29°19.7’N, 73°18.6’W, RV Columbus Iselin , cr. 8007, st. CO57, 45’ otter trawl, 4269–4279 m, 19. Sep. 1980 GoogleMaps . Non-type ; IORAS 03293 (SL 45 mm, juv.), Mid-Atlantic ridge, 16°50.052’N, 46°33.045’W, RV Professor Logachev, cr. 37, st. 158, Sigsbee trawl, 3227 m, 4 Mar. 2015 GoogleMaps .

Diagnosis. Barathronus multidens differs from the other four Barathronus species with a transparent peritoneum by the following combination of characters: vomer with 11 and dentaries with 8–11 fangs, dorsal-fin rays 72–ca. 75, anal-fin rays 62– ca. 65, pectoral-fin rays 23–24, precaudal vertebrae 32–34, total vertebrae 77–79, long gill rakers on anterior arch 23–25, paired bulbs at basis of penis absent ( Fig. 19 View FIGURE 19 ), penis protected ventrally by large urogenital hood and no ventral flexure of anterior vertebrae. The very small otolith ( Fig. 20 View FIGURE 20 ) is almost circular with the undivided sulcus placed centrally. Head and body yellowish without pigmentation.

Description. For a detailed description of the holo- and paratype see Nielsen (1984a: 583) and for the juvenile see Evseenko et al. (2018: 138). The principal meristic and morphometric characters are shown in Table 2.

Comparisons. Barathronus multidens seems most similar to B. parfaiti sharing a transparent peritoneum and lack of ventral flexure of anteriormost vertebrae. They differ by B. multidens having more fangs on vomer (7–11 vs. 1+) and less long rakers on anterior gill arch (23–25 vs. 29).

Distribution ( Fig. 1 View FIGURE 1 ). The three specimens known are from the East (3610-3646 m) and West (4269-4279 m) Atlantic Ocean and from the Mid-Atlantic Ridge (3227 m), all caught in bottom fishing gear. The specimen from the Mid-Atlantic Ridge is a juvenile with weekly ossified vertebrae which indicates that it might have been caught pelagically during hauling of the trawl. The other two specimens are adult males with well-ossified vertebrae indicating a benthopelagic occurrence.

Remarks. Evseenko et al. (2018: 139) presented two phylogenies each based on two different genes.

RV

Collection of Leptospira Strains

ZMUC

Zoological Museum, University of Copenhagen

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Ophidiiformes

Family

Aphyonidae

Genus

Barathronus

Loc

Barathronus multidens Nielsen, 1984

Nielsen, Jørgen G. 2019
2019
Loc

Barathronus multidens:

Nielsen, J. G. & Cohen, D. M. & Markle, D. F. & Robins, C. R. 1999: 139
1999
Loc

Barathronus multidens

Nielsen, J. G. 1984: 583
1984
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