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Gnatholepis anjerensis Eye-bar goby New Caledonia Gobiidae distinct flap present at end of lower lip

GNATHOLEPIS ANJERENSIS - (BLEEKER, 1851)

Actinopterygii (Gigaclass) > Actinopteri (Class) > Teleostei (Subclass) > Gobiiformes (Order) > Gobiidae (Family) > Gobiinae (Subfamily) > Gnatholepis (Genus)

Gobie à oeil barré, Cabot sauteur, Anjer eye-bar goby, Eye-bar goby, Eyebar goby, Eye-bar sand-goby, Orange ear goby, Shoulderspot goby, Shoulderspot sandgoby, Yellowspot goby, Familien-Sandgrundel, Ade-ômonhaze, Ômonhaze,

Description
Épines dorsales (Total): 6 - 7; Rayons mous dorsaux (Total): 11; Épines anales 1; Rayons mous anaux: 11. Le gobie à oeil barré a une robe de couleurs fades, marbrée de taches brunâtres sur fond crème, et ponctuée de fins points foncés. Une trait vertical barre son oeil. Les yeux sont proéminents. Le museau est carré avec de petits appendices à la commissures des lèvres. Taille adulte 6.0 cm - 8.0 cm. Profondeur 1 - 45 m.

Etymologie
Gnatholepis : du Grec, gnathos = machoire, mandibule, maxillaire + du Grec, lepis = écaille de poisson.
anjerensis : De Anjer (maintenant Anyer) dans le détroit de Sunda, Java.
Description originale : Gobius anjerensis Bleeker, 1851.
Localité type : Gobius anjerensis a été décrit par Bleeker (1851) à la vue d'un simple dessin monochrome d'un spécimen qui avait été collecté durant la période de 1821-1823 par Kuhl et van Hasselt dans la localité de Anjer (maintenant Anyer) dans le détroit de Sunda, Java.

Distribution
Indo-Pacifique tropical de la mer Rouge, Afrique Est, jusqu'aux îles d'Hawaï, des Marquises et de la Societé. Présent en Nouvelle-Calédonie.

Espèces ressemblantes
Gobius geniporus (Valenciennes, 1837) - Présent uniquement en Méditerranée.
Asterropteryx spinosa (Goren, 1981) - Présent en Nouvelle-Calédonie.
Asterropteryx senoui (Shibukawa & Suzuki, 2007) - Présent en îles Ryukyu, Japon, Indonésie et Australie.

Synonymes
Gnatholepis deltoides (Seale, 1901)
Gnatholepis knightii (Jordan & Evermann, 1903)
Gobius anjerensis (Bleeker, 1851)
Gobius capistratus (Peters, 1855)
Gobius deltoides (Seale, 1901)

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Description
Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 11; Anal spines: 1; Anal soft rays: 11. Distinguished by the following characteristics: ctenoid scales on head, predorsal midline and pectoral fin base, distinct flap present at end of lower lip; at least three dark spots along first spine of first and second dorsal fins, followed by at least three rows of dark spots or short streaks, pectoral fin with rows of fine dark and white speckles; second dorsal and anal fin rays nearly always I,11; pectoral rays 14-17, modally 16; lateral scales 25-29, modally 27; predorsal scales 7-13, usually 9-10, mostly ctenoid, may be cycloid anteriorly or toward midline; body compressed, width at anus 11.9-28.1% (mean 15.2%) of SL; body stocky in appearance, body depth at anus 19.6-26.6% of SL, body depth at first dorsal fin origin 14.3-27.7% of SL; head compressed, broader ventrally, slightly deeper than wide, HL 26.6-33.3% of SL; head depth at posterior preopercular margin 62.0-83.7% of HL; head width at posterior preopercular margin 53.7-82.2% of HL; head profile bluntly pointed; nape slightly convex behind eyes; mouth subterminal to nearly terminal, slightly oblique; jaws generally reaching to below anterior margin of eye; upper jaw length 32.0-41.5% of HL; upper lip smooth, narrower than lower, lower lip papillose close to teeth, with twist or fold posteriorly, forming triangular flap, lip interrupted at chin; eye moderate to relatively small in large specimens, dorsolateral, 22.7-30.5% of HL; preorbital width 18.2-27.8% of HL; snout bluntly pointed, 22.4-44.4% of HL; posterior naris round to almost triangular, close to anterior margin of eye; anterior naris in short tube, higher on posterior margin of eye, about level with middle of eye or somewhat ventral to it; interorbital narrow, 4.7-11.3% of HL; caudal peduncle compressed, length 12.9-18.6% (mean 16.1%) of SL; caudal peduncle depth 10.7-13.8% of SL. Max length : 8.4 cm. Depth range 1 - 46 m.

Color
 Color varies greatly depending on the habitat, with individuals from sand areas being much lighter and those from dark habitats such as mangrove mud, much darker.
Body white with silvery reflections on some scales. All markings referred to as "dark" are black-brown. A bright yellow humeral spot, the anterior half of yellow humeral spot surrounded by dark pigment that then runs forward to eye as a line. Pupil black, surrounded by a narrow yellow ring. Iris white, with a small dark spot at center at both the front and back of eye. A dark bar running from ventral edge of pupil down across cheek. A narrow, dark bar dorsally on eye. centered over posterior half of pupil. Snout with reticulated dark markings. Both upper and lower jaws with some dark markings. Opercle with a dark line extending from center of pectoral-fin base to edge of preopercle where it widens. Six dark blotches running along side of body, just ventral to midline. A series of much smaller, distinct, dark spots scattered along dorsal half of body anteriorly, and extending to lower half of body from second dorsal fin posteriorly to caudal-fin base. Pectoral and pelvic fins immaculate. Dorsal fins with a few, scattered small, dark spots. Caudal fin crossed by a number of rows of small, dark spots.

Etymology
Gnatholepis: from Greek, gnathos = jaw, mandible, maxilla + Greek, lepis = a scale of a fish.
anjerensis: from Anjer (now Anyer) in the Sunda Straight, Java.
Original description: Gobius anjerensis Bleeker, 1851.
Locality type: Gobius anjerensis was described by Bleeker (1851) from a simple drawing without color markings of a specimen that had been collected in the period of 1821-1823 by Kuhl and van Hasselt from Anjer (now Anyer) in the Sunda Strait, Java.

Distribution
Indo-Pacific: Red Sea and East Africa to the Hawaiian, Marquesan and Society islands. Reported from New Caledonia.

Biology
Solitary or in loose groups in sand. Inhabits shallow coastal bays and estuaries on silty sandy substrates with sparse algae-reef or seagrasses. Benthic.

Similar species
Gobius geniporus (Valenciennes, 1837) - Mediterranean Sea, endemic.
Asterropteryx spinosa (Goren, 1981) - Reported from New Caledonia.
Asterropteryx senoui (Shibukawa & Suzuki, 2007) - Reported from Indonesia, east to Papua New Guinea, north to Ryukyu Islands And Australia.