Back-fin Barracudina, Stemonosudis retrodorsalis Ho, Russell, Graham & Psomadakis 2019

Cite this page as:

Bray, D.J. 2025, Stemonosudis retrodorsalis in Fishes of Australia, accessed 30 Jun 2025, https://fishesofaustralia.net.au/home/species/5710

Back-fin Barracudina, Stemonosudis retrodorsalis Ho, Russell, Graham & Psomadakis 2019

More Info

Distribution	Off Broken Bay, NSW, 33° 30'S, 152°04'E in 922-1015 m. The locality data provided for this non-type specimen (in Ho et al 2019: 225) as "FRV Soela, sta. So 2/82/43,45, 18°44’S, 117°02’E, 210 km north west of Port Hedland, Northwest Shelf, Eastern Indian Ocean, 396–406 m, Engel trawl, 13 Apr 1982" is incorrect). Elsewhere, the species occurs in the East-Indo-west Pacific: Indonesia and the Philippines.
Features	Dorsal fin 9-10; Anal fin32-34; Pectoral fin 12-13; Pelvic fin 9; Lateral-line scales 75-77; Vertebrae total 89-91, prehaemal 42-43, caudal 46-49, prepelvic 38-40, predorsal 57-58, preanal 56-58.
Similar Species	Differs from all others paralepidids in having the dorsal fin originating far back on the body, at about the same vertical as the anal-fin origin. It is most similar to Stemonosudis rothschildi in coloration, body proportions, and fin and vertebral formulae.
Etymology	The specific name is from the Latin retro (= backwards, in past times) and dorsalis (= of, or relating to the back), in reference to the far posterior position of the dorsal fin.
Species Citation	Stemonosudis retrodorsalis Ho, Russell, Graham & Psomadakis 2019, Zootaxa 4702(1): 225, Figs. 2C, 4-5. Type locality: Off Tawitawi Island, the Philippines, Sulu Sea, 5°40.9'N, 119°46.3'E - 5°43.1'N, 119°47.0'E, depth 460-514 m
Author	Bray, D.J. 2025
Resources	Atlas of Living Australia Australian Faunal Directory Catalog of Fishes

Back-fin Barracudina, Stemonosudis retrodorsalis Ho, Russell, Graham & Psomadakis 2019

References

Ho, H.-C., Russell, B., Graham, K. & Psomadakis, P.N. 2019. Review of the Stemonosudis rothschildi species complex, with descriptions of two new species from the Indo-west Pacific Ocean (Aulopiformes: Paralepididae). Zootaxa 4702(1): 216-229. https://doi.org/10.11646/zootaxa.4702.1.19