ECSENIUS ISOS - (MCKINNEY & SPRINGER, 1976)
Actinopterygii (Gigaclass) > Actinopteri (Class) > Teleostei (Subclass) > Blenniiformes (Order) > Blennioidei (Suborder) > Blenniidae (Family) > Salariinae (Subfamily) > Ecsenius (Genus)
Blennie ponctuée, Dotted blenny, Dotted combtooth blenny, 伊索异齿鳚,
Description
Dorsal spines (total): 12; Dorsal soft rays (total): 14-15, deeply notched between spinous and segmented-ray portions; Segmented anal fin rays: 16-17; Pectoral fin rays: 13-14 (usually: 13); Segmented caudal-fin rays: 13. Vertebrae: 10 + 22-23; Gill rakers: 13-14; Dentary incisor teeth (includes anterior canine teeth, which differ little, if at all, in appearance from incisors): 43-51; Posterior dentary canines 1 on each side. Lateral line without pairs of pores, terminating posteriorly at point between verticals from dorsal-fin spines 8 and 11. Cirrus present on posterior rim of anterior nostril; None on anterior rim. With bilateral pair of dark spots on the ventrolateral surface of the head in both males and females, and a dark, somewhat diffused, spot in the pectoral-fin axil. Lateral line generally extending slightly further posteriorly. Max. length: 3.2 cm SL. Depth range: 1 - 20 m.
Color
Head diffusely dusky, darker dorsally, with series of up to 4 small spots extending ventroanteriorly from opercular area; When four spots are present, dorsalmost is on opercle dorsally, and is diffusely or darkly dusky; Next spot is also on opercle, mid-laterally, and is dark or diffusely dusky; Next spot is on opercle just posterior to ventralmost preopercular pores, and is dark or diffusely dusky; Last spot is on mid-lateral ventral surface of head, always present, dark, and most prominent of series; Another, small dark or dusky spot occasionally present on cheek anterior to first from dorsalmost spot of opercular series; Ventral margin of lower lip dusky anteriorly. Side of body with two longitudinal series of markings, dorsal series beginning below spinous dorsal anteriorly as diffuse, relatively deep stripe of somewhat connected blotches, gradually intensifying as dark spots in area below mid-section of segmented-ray portion of fin; Terminal spot of dorsal series positioned no further posteriorly than very end of body; Ventral longitudinal series of markings similar to, and paired with, dorsal series (no more than 3 or 4 pairs of dark spots). Pectoral-fin axil with noticeable dark spot or marking in well-preserved specimens, diffusely represented in poorly preserved specimens. Fleshy pectoral-fin base with dark or dusky spot dorsally and another at about level of seventh from dorsalmost ray; Another spot just posterior (distal) to that at seventh ray extending from base a short distance onto fin rays. Spinous-dorsal fin with a diffusely dusky stripe suprabasally, usually continuous on segmented-ray portion, which has a diffusely dusky stripe distally. Anal fin with a deep, subdistal dusky stripe. Diffuse dusky extensions from terminal pair of spots on body extend a short distance on caudal fin. Pelvic fins unmarked.
Etymology
Ecsenius: origine uncertain, from Greek, ekseio = shake out or off, or from Greek, exenios, -os, -on = uncontrolled, immoderate.
Isos: from Ancient Greek, ísos = equal, like. referring to the presence of dark spots beneath the head on specimens of both sexes.
Original description: Ecsenius isos McKinney & Springer, 1976 - Type locality: New Hebrides (Vanuatu), Efate, British Bathing Beach, Pango Peninsula, collected by R. H. Snider, 22 November 1964.
Distribution
Western Central Pacific: Vanuatu and New Caledonia.
Biology
Inhabits shallow rocky and coral areas. Oviparous. Eggs are demersal and adhesive, and are attached to the substrate via a filamentous, adhesive pad or pedestal. Larvae are planktonic, often found in shallow, coastal waters.
Similar species
Ecsenius lubbocki (Springer, 1988) - Reported from Eastern Indian Ocean: Andaman Sea to Sumatra (Indonesia).
Ecsenius stictus (Springer, 1988) - Reported from Indo-West Pacific. Body pale with a distinct, dark Y-shaped mark on the fleshy pectoral-fin base, a black "chin-strap", fine spots sparsely peppering the rear of the body, a dark horizontal stripe from the rear of the eye above the gill cover, a dark lower lip followed by a conspicuous pale salmon-pink area on the chin and a dark dusky area behind.
Ecsenius trilineatus (Springer, 1972) - Reported from Western Pacific: Malaysia and Indonesia east to New Ireland (Papua New Guinea) and Solomon Islands.
Ecsenius yaeyamaensis (Aoyagi, 1954) - Reported from New Caledonia. A semi-translucent pale greyish blenny with a black ‘chinstrap’ and a black V-shaped mark on the pectoral-fin base, black dashes behind the eye and white spots on the body.
Blennie ponctuée, Dotted blenny, Dotted combtooth blenny, 伊索异齿鳚,
Description
Dorsal spines (total): 12; Dorsal soft rays (total): 14-15, deeply notched between spinous and segmented-ray portions; Segmented anal fin rays: 16-17; Pectoral fin rays: 13-14 (usually: 13); Segmented caudal-fin rays: 13. Vertebrae: 10 + 22-23; Gill rakers: 13-14; Dentary incisor teeth (includes anterior canine teeth, which differ little, if at all, in appearance from incisors): 43-51; Posterior dentary canines 1 on each side. Lateral line without pairs of pores, terminating posteriorly at point between verticals from dorsal-fin spines 8 and 11. Cirrus present on posterior rim of anterior nostril; None on anterior rim. With bilateral pair of dark spots on the ventrolateral surface of the head in both males and females, and a dark, somewhat diffused, spot in the pectoral-fin axil. Lateral line generally extending slightly further posteriorly. Max. length: 3.2 cm SL. Depth range: 1 - 20 m.
Color
Head diffusely dusky, darker dorsally, with series of up to 4 small spots extending ventroanteriorly from opercular area; When four spots are present, dorsalmost is on opercle dorsally, and is diffusely or darkly dusky; Next spot is also on opercle, mid-laterally, and is dark or diffusely dusky; Next spot is on opercle just posterior to ventralmost preopercular pores, and is dark or diffusely dusky; Last spot is on mid-lateral ventral surface of head, always present, dark, and most prominent of series; Another, small dark or dusky spot occasionally present on cheek anterior to first from dorsalmost spot of opercular series; Ventral margin of lower lip dusky anteriorly. Side of body with two longitudinal series of markings, dorsal series beginning below spinous dorsal anteriorly as diffuse, relatively deep stripe of somewhat connected blotches, gradually intensifying as dark spots in area below mid-section of segmented-ray portion of fin; Terminal spot of dorsal series positioned no further posteriorly than very end of body; Ventral longitudinal series of markings similar to, and paired with, dorsal series (no more than 3 or 4 pairs of dark spots). Pectoral-fin axil with noticeable dark spot or marking in well-preserved specimens, diffusely represented in poorly preserved specimens. Fleshy pectoral-fin base with dark or dusky spot dorsally and another at about level of seventh from dorsalmost ray; Another spot just posterior (distal) to that at seventh ray extending from base a short distance onto fin rays. Spinous-dorsal fin with a diffusely dusky stripe suprabasally, usually continuous on segmented-ray portion, which has a diffusely dusky stripe distally. Anal fin with a deep, subdistal dusky stripe. Diffuse dusky extensions from terminal pair of spots on body extend a short distance on caudal fin. Pelvic fins unmarked.
Etymology
Ecsenius: origine uncertain, from Greek, ekseio = shake out or off, or from Greek, exenios, -os, -on = uncontrolled, immoderate.
Isos: from Ancient Greek, ísos = equal, like. referring to the presence of dark spots beneath the head on specimens of both sexes.
Original description: Ecsenius isos McKinney & Springer, 1976 - Type locality: New Hebrides (Vanuatu), Efate, British Bathing Beach, Pango Peninsula, collected by R. H. Snider, 22 November 1964.
Distribution
Western Central Pacific: Vanuatu and New Caledonia.
Biology
Inhabits shallow rocky and coral areas. Oviparous. Eggs are demersal and adhesive, and are attached to the substrate via a filamentous, adhesive pad or pedestal. Larvae are planktonic, often found in shallow, coastal waters.
Similar species
Ecsenius lubbocki (Springer, 1988) - Reported from Eastern Indian Ocean: Andaman Sea to Sumatra (Indonesia).
Ecsenius stictus (Springer, 1988) - Reported from Indo-West Pacific. Body pale with a distinct, dark Y-shaped mark on the fleshy pectoral-fin base, a black "chin-strap", fine spots sparsely peppering the rear of the body, a dark horizontal stripe from the rear of the eye above the gill cover, a dark lower lip followed by a conspicuous pale salmon-pink area on the chin and a dark dusky area behind.
Ecsenius trilineatus (Springer, 1972) - Reported from Western Pacific: Malaysia and Indonesia east to New Ireland (Papua New Guinea) and Solomon Islands.
Ecsenius yaeyamaensis (Aoyagi, 1954) - Reported from New Caledonia. A semi-translucent pale greyish blenny with a black ‘chinstrap’ and a black V-shaped mark on the pectoral-fin base, black dashes behind the eye and white spots on the body.