taxonID	type	description	language	source
48F926337D635EF98CB94FF4249C2D28.taxon	description	Figs 2, 3, 4, 5, 6, 7, Table 2 New English common name: Java croaker New Indonesian name: Gulamah Jawa	en	Lin, Bai-an, Pogonoski, John J., Fahmi,, Wibowo, Kunto, Chao, Ning Labbish, Seymour, Mathew (2025): Johnius javaensis, a new species of croaker (Acanthuriformes, Sciaenidae) from the southern coast of Java, Indonesia. ZooKeys 1259: 169-183, DOI: 10.3897/zookeys.1259.160425
48F926337D635EF98CB94FF4249C2D28.taxon	diagnosis	Diagnosis. A new species of Johnius characterized by five vesicular mental barbels on the chin, 11 or 12 swim-bladder appendages, and the ventral margin of the sagitta head expanded into a distinct convexity.	en	Lin, Bai-an, Pogonoski, John J., Fahmi,, Wibowo, Kunto, Chao, Ning Labbish, Seymour, Mathew (2025): Johnius javaensis, a new species of croaker (Acanthuriformes, Sciaenidae) from the southern coast of Java, Indonesia. ZooKeys 1259: 169-183, DOI: 10.3897/zookeys.1259.160425
48F926337D635EF98CB94FF4249C2D28.taxon	description	Description. Dorsal fin X + I, 32 (X + I, 30 – 32); anal fin II, 7; pectoral fin rays 18 (17 – 18); caudal fin rays 17; pored lateral line scales 48 (46 – 48); scale rows above lateral line 5 (4 – 5), below 8 (7 – 8); outer gill rakers of 1 st arch 6 + 1 + 12 = 19 (5 – 6 + 1 + 11 – 12 = 17 – 19); vertebrae 11 + 14, last well-developed pleural rib on 10 th vertebra, first anal proximal radial between 11 th – 12 th vertebrae; swim-bladder appendages 11 – 12. Proportions as % of SL: head length 28.4 (25.9 – 27.2); eye diameter 5.4 (5.8 – 6.1); body depth 31.7 (27.1 – 29.2); body width 18.4 (14.5 – 16.7). Proportions as % of HL: eye diameter 18.9 (22.2 – 22.6); snout length 27.0 (24.4 – 25.5); interorbital width 26.2 (25.2 – 27.6); post-orbital length 58.1 (53.1 – 57.1); maxillary length 35.5 (34.2 – 35.9); second anal spine length 30.8 (34.5 – 40.1). Body moderately deep, dorsal profile evenly arched, ventral profile rather flat; head conical, 25.9 – 28.4 % of SL. Snout bluntly rounded, projecting in front of upper jaw; three upper and three marginal snout pores; underside of lower jaw with five mental pores, median mental pore with two small openings inside, very closely positioned. Five vesicular mental barbels at chin, with anterior pair of mental barbels on both sides of anterior point of inner mental pore, one middle mental barbel at the posterior end of median mental pore, and posterior pair of mental barbels at the posterior end of outer mental pore. Mouth inferior with upper jaw longer than lower jaw, upper jaw extending posteriorly to below middle of eye or hind margin of pupil. Upper jaw with a single, outer row of teeth slightly enlarged, and an inner band of small, conical teeth. Lower jaw with broad band of uniformly small, conical teeth. Eye circular, eye diameter small in holotype (18.9 % of HL) and moderately large in paratypes (22.2 – 22.6 % of HL). Eye diameter smaller than interorbital width. Anterior and posterior nostrils circular and somewhat ovate, respectively, just anterior to eye; posterior nostril twice the size of the anterior. Gill rakers short and stiff, its length approximately 31.4 – 46.2 % of gill filament length at angle of the gill arch. Scales large, cycloid on head (except operculum), throat, membrane of dorsal, anal and caudal fins; body scales ctenoid, ctenii well developed. Opercular scales a mix of cycloid and ctenoid. Third or fourth dorsal spine longest. First soft ray of pelvic fin with short filament. Second anal-fin spine stiff, its length 59.6 – 74.9 % of first anal-fin ray and 30.8 - 40.1 % of head length. Caudal fin rhomboid. Sagitta thick and triangular; ostium of sulcus in head with long axis lying obliquely to sagitta; cauda expanded and deepened as hollow cone; outer surface with crest-like elevations; ventral margin of sagitta head expanded to a distinct convexity. Swimbladder hammer-shaped, with 11 or 12 pairs of arborescent diverticula attached to anterior and lateral sides of main chamber, becoming tubular posteriorly. First anterior pair of diverticulae pierces through septum transversum, reaching to the base of cranium (basioccipital and exoccipital bones). Drumming muscles restricted to male (absent in female) and positioned on the lateral body cavity wall.	en	Lin, Bai-an, Pogonoski, John J., Fahmi,, Wibowo, Kunto, Chao, Ning Labbish, Seymour, Mathew (2025): Johnius javaensis, a new species of croaker (Acanthuriformes, Sciaenidae) from the southern coast of Java, Indonesia. ZooKeys 1259: 169-183, DOI: 10.3897/zookeys.1259.160425
48F926337D635EF98CB94FF4249C2D28.taxon	distribution	Geographical distribution. All specimens of the new species were collected from the west and central coast of southern Java, Indonesia.	en	Lin, Bai-an, Pogonoski, John J., Fahmi,, Wibowo, Kunto, Chao, Ning Labbish, Seymour, Mathew (2025): Johnius javaensis, a new species of croaker (Acanthuriformes, Sciaenidae) from the southern coast of Java, Indonesia. ZooKeys 1259: 169-183, DOI: 10.3897/zookeys.1259.160425
48F926337D635EF98CB94FF4249C2D28.taxon	etymology	Etymology. The specific name ‘‘ javaensis ’’ is proposed, as all collected specimens were from the west and central of southern Java.	en	Lin, Bai-an, Pogonoski, John J., Fahmi,, Wibowo, Kunto, Chao, Ning Labbish, Seymour, Mathew (2025): Johnius javaensis, a new species of croaker (Acanthuriformes, Sciaenidae) from the southern coast of Java, Indonesia. ZooKeys 1259: 169-183, DOI: 10.3897/zookeys.1259.160425
