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| (A1-A2) Paracheilinus amanda, new species; (B) P. carpenteri, (C) P. flavianalis, (D) P. mccoskeri, (E) P. rubricaudalis. in Tea & Walsh. 2023. DOI: 10.1643/i2023019 Photographs by H. H. Tan (A1); T. Yamazumi (A2); T. Cameron (B); V. Chalias (C); T. Kawamoto (D); and N. DeLoach (E). |
Abstract
Australian species of the cirrhilabrin labrid genus Paracheilinus are reviewed. Four species of Paracheilinus are reported from Australian waters: P. amanda, new species, from Flora, Holmes, and Osprey Reefs, Coral Sea, off northeast Queensland, and Harrier Reef, Great Barrier Reef; P. filamentosus from Lizard Island, Great Barrier Reef; P. flavianalis from Evans and Flinders Shoals, Timor Sea, off northeast Darwin, Northern Territory, and Ashmore, Scott, Seringapatam, and Hibernia Reefs in the north-western shelf of Western Australia; and P. nursalim from Flinders Shoal, Timor Sea, off northern Darwin, Northern Territory. Paracheilinus amanda, new species, has previously been confused for P. rubricaudalis from Melanesia, but molecular analysis of mitochondrial COI recovers both species as reciprocally monophyletic lineages, differing from each other by 1–1.2% in genetic distance. They further differ in aspects of live coloration of terminal phase (TP) males. Both species are allopatric and do not overlap in distribution. The new species is described on the basis of six specimens: the holotype and two paratypes from Harrier Reef, Great Barrier Reef, one paratype from Flora Reef, Coral Sea, and from two paratypes collected off Hula in southern Papua New Guinea, along the north-western margin of the Coral Sea. The discovery of P. nursalim in Australia represents a new and significant range extension from previous locality records of West Papua and Ambon Bay. Paracheilinus is rediagnosed, and keys, diagnoses, photographs, and Australian distribution records are presented for all species herein.
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| Paracheilinus amanda, new species, aquarium specimen from Harrier Reef, the Great Barrier Reef. Specimen not retained. Photograph by K. Endoh. |
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| A selection of Paracheilinus in life. (A1) Paracheilinus amanda, new species, ZRC 64175, male paratype, 47.6 mm SL, off Hula, southern Papua New Guinea, Coral Sea; (A2) P. amanda, new species, underwater photograph from Osprey Reef, Coral Sea; (B) P. carpenteri, underwater photograph from Mabini, Batangas, Philippines. Note the darkened posterior dorsal- and caudal-fin bases and the presence of a second stripe behind the pectoral fin; (C) P. flavianalis, underwater photograph from Bali, Indonesia; (D) P. mccoskeri, underwater photograph from Khao Lak, Thailand; (E) P. rubricaudalis, underwater photograph from Mborokua, Solomon Islands. Note the reduced markings on caudal fin. Photographs by H. H. Tan (A1); T. Yamazumi (A2); T. Cameron (B); V. Chalias (C); T. Kawamoto (D); and N. DeLoach (E). |
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| Paracheilinus filamentosus, images of live and preserved specimens. (A) Male in resting colors, underwater photograph from Guadalcanal, Solomon Islands; (B) flashing male in nuptial colors, underwater photograph from Nggatokae, western Solomon Islands; (C) flashing male in nuptial colors, underwater photograph from the Solomon Islands; (D) AMS I.17479-001, 51.7 mm SL, male paratype, Tassafaronga Point, Guadalcanal, Solomon Islands. Note purple spines and rays in preservation; (E) harem comprising one TP male (middle) and several females and immature males, underwater photograph from Lovukol, central Solomon Islands. Photographs by M. Rosenstein (A–C, E) and Y. K. Tea (D). |
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| Select individuals of Paracheilinus flavianalis demonstrating variability in the number of dorsal-fin filaments, coloration of anal fin, and spot band pattern on the anal fin. (A) Underwater photograph from Triton Bay, Indonesia; (B) underwater photograph from Wakatobi, Sulawesi, Indonesia; (C–D) underwater photographs from Bali, Indonesia. Photographs by R. Smith (A); J. Castellano (B); W. Osborn (C); and R. H. Kuiter (D). |
Yi-Kai Tea and Fenton Walsh. 2023. Review of Australian Species of Paracheilinus Fourmanoir (Teleostei: Labridae), with Description of A New Species from the Great Barrier Reef and Coral Sea. Ichthyology & Herpetology. 111(3); 397-415. DOI: 10.1643/i2023019
