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| Lebbeus cultrirostris Wang, Sha & Sun, 2023 |
Highlights:
• Two new species were described.
• The validity of Paralebbeus was examined.
• Paralebbeus should be synonymized with Lebbeus.
Abstract
During two expeditions to Caroline Plate seamounts and Zhenbei seamount in the NW Pacific, three Paralebbeus (we list Paralebbeus as a synonym of Lebbeus herein) specimens are sampled. Two of them are recognized as new to science herein after carefully morphological observations. L. cultrirostris sp. nov. collected with the keratoisidid coral at a depth of 866 m is characterized by the smooth rostrum, and the telson having three pairs of dorsolateral spines. L. kexuei sp. nov. collected at a depth of 796–1510 m is characterized by the rostrum only bearing two dorsal spines, and the carpus of pereopod 2 having two articles equal in length. Morphological characters and generic analysis of mitochondrial COI and 16 S rRNA genes using maximum likelihood, Bayesian inference, and pairwise uncorrected p-distances indicated that all species of Paralebbeus Bruce and Chace (1986 should be transferred into genus Lebbeus White, 1847.
Keywords: Decapoda, Paralebbeus, Lebbeus, New species, Deep sea
Superfamily Alpheoidea Rafinesque, 1815
Family Thoridae Kingsley, 1879
Genus Lebbeus White, 1847
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| Lebbeus cultrirostris sp. nov., not ovigerous female holotype, cl 10.1 mm, pcl 7.6 mm, MBM 287552. A, photographed immediately after sampling on Zhenbei seamount, by Wei Jiang; B, the keratoisidid coral collected by ROV “Faxian”, and the red arrow points to this new species. |
Lebbeus cultrirostris sp. nov.
Etymology: From the Latin cultr (= knife) and rostr (= rostrum), referring to the shape of the rostrum of the species.
Lebbeus kexuei sp. nov.
Etymology: The species name is derived from the oceanographic vessel “Kexue” of Institute of Oceanology, Chinese Academy of Sciences, which contributed substantially to biological studies of seamounts in Caroline Plate.
Yanrong Wang, Zhongli Sha and Shao'e Sun. 2023. Integrative Taxonomy reveals Two New Species of Lebbeus (Decapoda: Thoridae) from Seamounts in NW Pacific, and Questions the Validity of the Genus Paralebbeus. Deep Sea Research Part I: Oceanographic Research Papers. 197; 104044. DOI: doi.org/10.1016/j.dsr.2023.104044
