taxonID	type	description	language	source
BEDA88598AB95B1EA0E116CC287D44EF.taxon	type_taxon	Type species. Polymixia nobilis Lowe, 1836.	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
7B2FEDD0F8105E4699D8487F4F59B26E.taxon	description	Figs 1, 2, 3, 4 A, 5 B, 6, 7; Tables 1, 2, 3, 4 New English name. Black-mouth beardfish New Chinese name. 黑口鬚銀眼鯛	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
7B2FEDD0F8105E4699D8487F4F59B26E.taxon	etymology	Etymology. The specific name melanostoma is a combination of Greek melano and stoma, meaning “ black mouth ”, in reference to its unique black oral cavity.	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
7B2FEDD0F8105E4699D8487F4F59B26E.taxon	diagnosis	Diagnosis. Polymixia melanostoma sp. nov. differs from its congeners in having the following combination of characters: dorsal-fin rays IV – V, 35 – 37; gill rakers on the outer face of first gill arch 3 + 1 + 6 = 10; S 1 6 – 8; S 2 12 – 14; pyloric caeca 40; snout rounded, with surface rough and gelatinous, its tip evidently protrude anterior margin of premaxilla; ctenii on body scales arranged in wedge shape, forming three rows; 4 th anal-fin spine long, 1.0 – 1.2 in eye diameter; dorsal-fin long, 49.6 – 53.0 % SL; oral-branchial cavity, not including the underside of tongue, black.	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
7B2FEDD0F8105E4699D8487F4F59B26E.taxon	description	Description. Meristic and morphometric data are provided in Tables 1, 2. Data below are for the holotype, followed by a range of paratypes in parentheses, except where indicated. Dorsal-fin rays V, 35 (IV – V, 36 – 37); pectoral-fin rays 17 (15 – 16); pelvic-fin rays i + 6 (i + 6); anal-fin rays IV, 14 (IV, 14 – 16); principal caudal-fin rays 9 + 9 = 18 (9 + 9 = 18), uppermost and lowermost rays unbranched; procurrent caudal-fin rays 5 (6) dorsally and 5 (5) ventrally; lateral-line scales 35 (35 – 39); S 1 6 (7 – 8); S 2 12 (14); S 3 15 (16, n = 1); gill rakers on the outer face of first gill arch 3 + 1 + 6 = 10 (3 + 1 + 6 = 10); pseudobranchial filaments 27 (33); pyloric caeca 40; branchiostegal rays 7 and only posterior 4 visible. Vertebrae 12 + 17 = 29 (12 + 17 = 29); supraneural and pterygiophore insertion formula: 0 / 0 // 0 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 + 1 / 1 + 1 + 1 / 2 (0 / 0 // 0 / 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 / 1 / 1 + 1 / 1 + 1 / 1 + 1 + 1 / 1 + 1 + / 1 + 1 + 1 / 1 + 1 / 1 + 1 / 1 + 1 + 1 / 1 + 1 / 1 + 1 + 1 / 1 + 1 / 1 + 1 + 1 / 1 + 2, n = 1). Body rather slender, longer than deep, depth at dorsal-fin origin 2.8 (2.5 – 3.0) in SL. Head large, its length 2.9 (2.8 – 2.9) in SL; from snout to forehead rising gently; upper profile in front of dorsal fin slightly concave; forehead narrow, its width 6.1 (7.5 – 7.6) in HL; eyes large, 2.8 (2.6 – 3.0) in HL; snout rounded, its surface rough and gelatinous with several small bumps, tip protruding anteriorly from premaxilla, its length 6.1 (5.8 – 6.1) in HL; space between eyes convex and rather narrow, interorbital width 3.0 (3.1 – 3.4) in HL. Mouth large, posterior end of maxilla extending distinctly beyond vertical through posterior margin of eye. Nostrils close together but separated by narrow membranes, both immediately in front of anterior margin of eye and below horizontal through of eye; posterior nostril much larger than anterior one. No knob at symphysis of dentaries. Two supramaxillae, with anterior one triangular and posterior one rectangular, rounded posteriorly, not covering posterior portion of maxilla; postventral corner of maxilla exposed. Posterior-ventral margin of preopercle serrated with tip slightly pointed. Lower-jaw barbels, length 1.2 (1.0 – 1.1) in HL, its end exceeds pelvic-fin origin. Most portions of lateral and medial surfaces of premaxilla and dentary covered with villiform teeth. Palatine and ectopterygoid with narrow band of villiform teeth; vomer with an oblong patch of villiform teeth. Endopterygoid with a large patch of villiform teeth. Gill rakers rod-shaped, somewhat laterally compressed, with villiform teeth on inner surfaces; those in outer row of the first arch longest; rakers on inner row of the first arch and both inner and outer rows of the second to third arches short, forming bumps; those on the fourth arch forming bumps; small tooth patches forming bumps, present on midline of all four outer arches. Villiform, teardrop-like tooth patches present on the fifth ceratobranchial. Small villiform teeth patch on the second pharygobranchial forming oval patches. Large, teardrop-like tooth patches on the third pharyngobranchial. Body covered with firmly attached ctenoid scales; ctenii on body scales arranged in a wedge shape, forming three rows (Fig. 3 A). Isthmus with ctenoid scales; gular region naked, without scales. Dorsal fin long, 2.0 (1.9 – 2.0) in SL. Dorsal-fin spines progressively longer posteriorly, length of the longest spine 0.9 (0.8 – 0.9) in eye diameter; outer margin of soft rays slightly concave; the first soft ray longest, and gradually shorter posteriorly. Anal-fin spines progressively longer posteriorly, length of the longest spine rather long, 1.2 (1.0 – 1.2) in eye diameter; outer margin of soft rays slightly concave; first soft ray longest. Pectoral fin short, 1.6 (1.5 – 1.8) in HL, its tip not reaching lateral line when adpressed to body. Pelvic fin without spine, its end slightly exceeds through pectoral-fin end vertical. Caudal-fin concave and pointed. Pyloric caeca pale, unbranched.	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
7B2FEDD0F8105E4699D8487F4F59B26E.taxon	description	Size. Moderately small species. The biggest specimen examined was 153.0 mm SL.	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
7B2FEDD0F8105E4699D8487F4F59B26E.taxon	distribution	Distribution. This species is known from specimens collected from southwestern and eastern Taiwan and the Chesterfield Islands of New Caledonia, suggesting a broad distribution in the western Pacific Ocean. Inhabits at depth down to 778 m (based on MNHN 2014 - 2291).	en	Fan, You-Ci, Su, Yo, Lin, Chien-Hsiang, Chang, Chih-Wei, Lin, Hsiu-Chin (2024): Polymixia melanostoma, a new beardfish from the western Pacific (Teleostei, Polymixiiformes, Polymixiidae). ZooKeys 1220: 105-121, DOI: 10.3897/zookeys.1220.125127
