Smalleye Lanternshark, Etmopterus litvinovi Parin & Kotlyar 1990

Other Names: Smalleye Lantern Shark

Summary:

A small uniformly black lantern shark with withan anteroposteriorly oblong narrow pineal window, and a narrow unpigmented posterior margin on the pectoral, dorsal, and caudal fins, and a pale green pupil. No apparent flank markings or demarcated clusters of photophores are apparent.

Cite this page as:

Bray, D.J. 2023, Etmopterus litvinovi in Fishes of Australia, accessed 28 Apr 2024, https://fishesofaustralia.net.au/Home/species/5717

Smalleye Lanternshark, Etmopterus litvinovi Parin & Kotlyar 1990

More Info

Distribution	SW of Christmas Island in the eastern Indian Ocean, AUS EEZ. Elsewhere the species occurs along the Nazca and Sala y Gomez Submarine Ridges in the Eastern Pacific. Inhabits seamounts, ridges and rises.
Features	Snout short with pre-narial length 2.9–4.0% TL, pre-oral length 6.9–9.0% TL; mouth broad and strongly arched, mouth width 1.0–1.5 times into pre-oral length. Dentition exhibits strong disjunct dignathic heterodonty with upper teeth comprised of single median cusp, flanked by 1–2 pairs of lateral cusplets, lower teeth with low, distally-inclined cusps lacking serrations and a low posterior blade; dermal denticles short, slender, with slightly hook-like conical crowns; denticles below second dorsal fin arranged in irregular patch densities and align into rows along the ceratotrichia of the fins; denticles dense around eyes and gill openings, sparse to bare on ventrum of snout tip and around mouth; first dorsal fin similar in size to second dorsal fin; second-dorsal-fin spine 1.6–2.3 times longer than first-dorsal-fin spine; second-dorsal-fin spine height greater than second-dorsal fin apex; interdorsal-fin space moderately long, 19.2–21.4% TL.
Biology	Reproduction is viviparous and size-at-birth is <17 cm TL.
Remarks	Etmopterus benchleyi is a synonym of E. litvinovi (Agne et al. 2022).
Etymology	The species is named in honour of Russian ichthyologist Fedor Fedorovich Litvinov, who helped collect the type specimen aboard the RV Professor Schtockman.
Species Citation	Etmopterus litvinovi Parin & Kotlyar in Kotlyar 1990 Trudy Instituta Okeanologii Imeni P.P. Shirshova 125: 141, Fig. 7. Type locality: 25°53'S, 84°34'W, southeastern Pacific, depth 1030-1050 m.
Author	Bray, D.J. 2023
Resources	Atlas of Living Australia Australian Faunal Directory Catalog of Fishes

Smalleye Lanternshark, Etmopterus litvinovi Parin & Kotlyar 1990

References

Agne, S., Naylor, G.J.P., Preick, M., Yang, L., et al. 2022. Taxonomic Identification of two poorly known lantern shark species based on mitochondrial DNA from wet-collection paratypes. Frontiers in Ecology and Evolution 10:910009. https://doi.org/10.3389/fevo.2022.910009

Ebert, D.A., Concha, F., Herman, K. & Kyne, P.M. 2020. Etmopterus litvinovi. The IUCN Red List of Threatened Species 2020: e.T63159A124463835. https://dx.doi.org/10.2305/IUCN.UK.2020-3.RLTS.T63159A124463835.en. Accessed on 06 July 2023.

Kotlyar, A.N. 1990. Dogfish sharks of the genus Etmopterus Rafinesque from the Nazca and Sala y Gómez submarine ridges. Trudy Instituta Okeanologii Imeni P.P. Shirshova 125: 127-147 (in Russian, English summary)

Last, P. R., Burgess, G.H. & Séret, B. 2002. Description of six new species of lantern-sharks of the genus Etmopterus (Squaloidea: Etmopteridae) from the Australasian region. Cybium 26(3): 203-223 https://doi.org/10.26028/cybium/2002-263-006

Vásquez, V.E., Ebert, D.A. & Long, D.J. 2015. Etmopterus benchleyi n. sp., a new lanternshark (Squaliformes: Etmopteridae) from the central eastern Pacific Ocean. Journal of the Ocean Science Foundation 17: 43-55. https://doi.org/10.5281/zenodo.1051834