Etmopterus lii

Ng, Liu & Joung, 2024



Classification: Elasmobranchii Squaliformes Etmopteridae

Reference of the original description
Ng, S.-L. & Liu, K.-M. & Joung, S.-J. (2024)
Description of a new lanternshark species from the South China Sea, with additional description of Etmopterus sheikoi from Taiwanese waters (Squaliformes: Etmopteridae). Raffles Bulletin of Zoology, 72, 26–41



Description :


Citation: Etmopterus lii Ng, Liu & Joung, 2024: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 07/2024

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Etmopterus lii Ng, Liu &.Joung, 2024, (A, holotype, ASIZP0081745, mature male, 341 mm TL; B, paratype, ASIZP0081742, immature female, 381 mm TL. Scale bar=10 mm, South China Sea © Ng, Liu &.Joung, 2024
Common names
eng Li’s lanternshark

Short Description
Original diagnosis of Ng, Liu &.Joung, 2024 [32564]: A medium-sized species of Etmopterus differing from all other congeners except E. sheikoi, by having a combination of flat and frustum-shaped denticles, elongated anterior and posterior lateral flank markings, and multicuspid lower jaw teeth in mature males. It differs from E. sheikoi by having a much narrower posterior flank marking, the shape and position of the caudal base marking, the length of posterior caudal marking, relatively larger gill slits, relatively more monospondylous, precaudal and total centra.

Distribution
northern South China Sea [32564]

Size / Weight / Age
TL (max): males to 341 mm, females to 381 mm TL, specimens smaller than 143 mm TL representing the approximate birth size [32564]

Habitat
marine; depth approximately 500 m [32564]

Dentition
Teeth dissimilar in upper and lower jaw, with strong ontogenetic and sexual dimorphism (Fig. 4); upper teeth multicuspid, in three functional series, small, central cusp thick; immature males and females with two cusplets on each side of the cusp of upper teeth, while mature males have three cusplets; inner pair of cusplet longest, length about two-third of the central cusp; teeth in lower jaw unicuspid in immature individuals, in three series, one functional; lower teeth blade-like, with strongly oblique cusp; the cusps of lower teeth of mature males are flanked with two to three small cusplets on each side, the outer one minute. Tooth count of upper jaw 23 (21–25), lower jaw 30 (27–32), total count 53 (49–55) [32564]

Remarks
shark-references Species-ID=16810