VALENCIENNEA HELSDINGENII - (BLEEKER, 1858)
Actinopteri (Class) > Perciformes (Order) > Gobioidei (Suborder) > Gobiidae (Family) > Gobiinae (Subfamily) > Valenciennea (Genus)
Gobie à ruban, Gobie rayé, Black-lined sleeper-goby, Blacklined glider goby, Blacklined glidergoby, Black lined sleeper goby, Railway glider, Railway sleeper goby, Twostripe goby, Kuroitohaze,
Synonymes
Calleleotris helsdingenii (Bleeker, 1858)
Eleotriodes helsdingeni (Bleeker, 1858)
Eleotriodes helsdingenii (Bleeker, 1858)
Valenciennea helsdingeni (Bleeker, 1858)
Valenciennesia helsdingenii (Bleeker, 1858)
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Description
Dorsal spines (total): 7; Dorsal soft rays (total): 11; Anal spines: 1; Anal soft rays: 11. Characterized by pale grey body color with broad white midlateral stripe bordered by pair of black to brownish stripes; first dorsal fin with large black spot; truncate to slightly emarginate caudal fin, ray above and below central three rays prolonged as filament in adult; length of caudal fin 2.4-5.0 in SL; longitudinal scale series 127-146; ctenoid body scales except cycloid on abdomen; head or midline of nape without scales; in adult, cycloid scales extending forward on side of nape to above middle of operculum; base of pectoral fin and prepelvic area scaled in adult; depth of body 5.0 in SL. Max length : 25.0 cm. Common length : 18.0 cm. Depth range 1 - 45 m, usually 1 - 30 m.
The body of twostripe gobies is elongated and laterally compressed. They are commonly 18 cm (7.1 in) in length, with a maximum length of 25 cm (9.8 in). The body is predominantly white to pale gray in color, with the dorsal surface a darker brownish gray. It has two prominent orange, dark red, reddish-brown, or black lines running longitudinally on the sides of its body, darkest at the anterior end and growing lighter towards the back. The upper line begins from the front of the snout, goes through the eye, and ends at the tip of the upper fork of the caudal fin. The lower line is parallel to the upper line and begins from the side of the upper lip, through the middle of the base of pectoral fins, and ends at the tip of the lower fork of the caudal fin. Both upper and lower lines are outlined in white at the caudal fin. A large oval black spot is also present between the third and fifth spines of the dorsal fin. The pelvic fins are completely separated, no membrane is present between the first and the second dorsal fins. The first dorsal fin is shallow and its margin rounded, and the fourth spine is slightly longer than the other spines. The caudal fin in adults is deeply notched with two long filaments. Juveniles have more rounded caudal fins.
Etymology
Valenciennea: From Achille Valenciennes 1794-1865; he worked with Duméril, Cuvier and Lacepède since 1815; malacologist, author of a "Histoire naturelle des poissons".
helsdingenii: in honnor of W.F.C. van Helsdingen, Civil servant added to the Gouvernor of the Moluccan Islands. Goram-Archipel.
Pieter Bleeker, in Ichthyologiae - Archipelagi Indici - Promodus, 1858 vol.1 - P. 17 writed : "The larger part of the honour of the numerous discoveries, mentioned in this work, therefore is due to those disinterested co-operators and therefore it is for me a dire obligation, to mention here with gratitude the names of all, who by their consignments have enabled me to advance science with a not unimportant step. Those names already form a long list and at present I see among them many who have succumbed to the blows of the tropical climate."
Twostripe gobies were first described by the Dutch ichthyologist Pieter Bleeker in 1858 as Eleotriodes helsdingenii. The type specimens were originally collected from Pulau-Pulau Gorong, Maluku, Indonesia.
Distribution
Indo-West Pacific: southern Red Sea and East Africa (where common) to Indonesia, north to southern Japan, south to the Great Barrier Reef. Reported from New Caledonia.
Biology
A relatively rare species occurring singly but usually in pairs over silty flat sand patches, or rubble substrates; a mound-building species. Usually found on outer reefs at the bottom of coral or rocky drop-offs, rarely in lagoons. Feeds on small burrowing animals by sifting mouthfuls of sand. Monogamous. Eggs hatched 2 days after spawning in aquaria; 35 days after, the larvae reached 5.25 mm. Juveniles are usually found near rocks in clear estuaries.
Gobie à ruban, Gobie rayé, Black-lined sleeper-goby, Blacklined glider goby, Blacklined glidergoby, Black lined sleeper goby, Railway glider, Railway sleeper goby, Twostripe goby, Kuroitohaze,
Synonymes
Calleleotris helsdingenii (Bleeker, 1858)
Eleotriodes helsdingeni (Bleeker, 1858)
Eleotriodes helsdingenii (Bleeker, 1858)
Valenciennea helsdingeni (Bleeker, 1858)
Valenciennesia helsdingenii (Bleeker, 1858)
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Description
Dorsal spines (total): 7; Dorsal soft rays (total): 11; Anal spines: 1; Anal soft rays: 11. Characterized by pale grey body color with broad white midlateral stripe bordered by pair of black to brownish stripes; first dorsal fin with large black spot; truncate to slightly emarginate caudal fin, ray above and below central three rays prolonged as filament in adult; length of caudal fin 2.4-5.0 in SL; longitudinal scale series 127-146; ctenoid body scales except cycloid on abdomen; head or midline of nape without scales; in adult, cycloid scales extending forward on side of nape to above middle of operculum; base of pectoral fin and prepelvic area scaled in adult; depth of body 5.0 in SL. Max length : 25.0 cm. Common length : 18.0 cm. Depth range 1 - 45 m, usually 1 - 30 m.
The body of twostripe gobies is elongated and laterally compressed. They are commonly 18 cm (7.1 in) in length, with a maximum length of 25 cm (9.8 in). The body is predominantly white to pale gray in color, with the dorsal surface a darker brownish gray. It has two prominent orange, dark red, reddish-brown, or black lines running longitudinally on the sides of its body, darkest at the anterior end and growing lighter towards the back. The upper line begins from the front of the snout, goes through the eye, and ends at the tip of the upper fork of the caudal fin. The lower line is parallel to the upper line and begins from the side of the upper lip, through the middle of the base of pectoral fins, and ends at the tip of the lower fork of the caudal fin. Both upper and lower lines are outlined in white at the caudal fin. A large oval black spot is also present between the third and fifth spines of the dorsal fin. The pelvic fins are completely separated, no membrane is present between the first and the second dorsal fins. The first dorsal fin is shallow and its margin rounded, and the fourth spine is slightly longer than the other spines. The caudal fin in adults is deeply notched with two long filaments. Juveniles have more rounded caudal fins.
Etymology
Valenciennea: From Achille Valenciennes 1794-1865; he worked with Duméril, Cuvier and Lacepède since 1815; malacologist, author of a "Histoire naturelle des poissons".
helsdingenii: in honnor of W.F.C. van Helsdingen, Civil servant added to the Gouvernor of the Moluccan Islands. Goram-Archipel.
Pieter Bleeker, in Ichthyologiae - Archipelagi Indici - Promodus, 1858 vol.1 - P. 17 writed : "The larger part of the honour of the numerous discoveries, mentioned in this work, therefore is due to those disinterested co-operators and therefore it is for me a dire obligation, to mention here with gratitude the names of all, who by their consignments have enabled me to advance science with a not unimportant step. Those names already form a long list and at present I see among them many who have succumbed to the blows of the tropical climate."
Twostripe gobies were first described by the Dutch ichthyologist Pieter Bleeker in 1858 as Eleotriodes helsdingenii. The type specimens were originally collected from Pulau-Pulau Gorong, Maluku, Indonesia.
Distribution
Indo-West Pacific: southern Red Sea and East Africa (where common) to Indonesia, north to southern Japan, south to the Great Barrier Reef. Reported from New Caledonia.
Biology
A relatively rare species occurring singly but usually in pairs over silty flat sand patches, or rubble substrates; a mound-building species. Usually found on outer reefs at the bottom of coral or rocky drop-offs, rarely in lagoons. Feeds on small burrowing animals by sifting mouthfuls of sand. Monogamous. Eggs hatched 2 days after spawning in aquaria; 35 days after, the larvae reached 5.25 mm. Juveniles are usually found near rocks in clear estuaries.