Istiblennius lineatus

Distribution and habitat. New Ireland: 4. — General distribution: Laccadive and Maldive islands east to Marshall Islands and Pitcairn, north to southern Japan, south to northern Australia and New Caledonia. Found in groups on rocky shores and exposed intertidal areas, 0 – 3 m depth. Marine.

Sumber: Checklist of the marine and estuarine fishes of New Ireland Province, Papua New Guinea, western Pacific Ocean, with 810 new records

Habitat. The specimen was collected from a rocky intertidal tidepool at a depth of approximately 0.1 – 0.4 m.

Sumber: New records of six combtooth blennies in the genera Blenniella, Cirripectes, Istiblennius, and Salarias (Perciformes: Blenniidae) from Taiping Island, South China Sea

Description. Dorsal-fin rays XII, 23; anal-fin rays II, 23; pectoral-fin rays 13; pelvic-fin rays I, 4; segment caudal-fin rays 6 + 5 (no branched); vertebrae 11 + 28; no nuchal cirri; supraorbital cirri 1 (single supraorbital cirrus present on each side, the right one extending into five branches); nasal cirri 5 (both side); lateral line tubes 14 (both side). Morphometric data are presented in Table 1. The body is elongate, moderately compressed posteriorly, and deepest at the base of the pectoral fin. The dorsal profile from the anterior margin of the eye to the snout is slightly concave, then gently rising posteriorly toward the nape and the origin of the first dorsal fin, gradually descending toward the caudal peduncle, and slightly arching again near its posterior end. The ventral profile is slightly convex from the tip of the lower jaw to the origin of the pelvic fin, then slightly convex again at the abdominal region, and thereafter nearly straight and parallel to the body axis toward the anus, slightly rising along the anal-fin base, and nearly straight again before reaching the posterior part of the caudal peduncle. The anus is located slightly anterior to mid-body. The head is bluntly rounded and widest at the mid-cheek region. The eye is moderately sized and positioned anterodorsally on the head. The nuchal cirri are arranged in two separated clusters at the midpoint of the nape. A complex cephalic sensory pore system is present. The posterior dorsal-fin rays are separated from the fin base, and the posteriormost membrane is not attached to the caudal peduncle. The anal-fin base extends from a point directly below the 11 th dorsal-fin spine to a point below the posterior end of the dorsal-fin base; the posteriormost anal-fin ray is split from its base. The caudal fin is arcuate. The pectoral-fin origin is located below the second dorsal-fin spine, and the ventralmost pectoral-fin base is positioned below the third dorsal-fin spine; the longest ray reaches a point anterior to the anus, and the posterior margin is rounded. The pelvic-fin origin is positioned anterior to the vertical level of the nuchal cirri, and the fin reaches to a level below the base of the third dorsal-fin spine. The general body coloration is dark gray, with several black longitudinal streaks extending from the posterior margin of the pectoral fin to the caudal peduncle. The head is grayish black. The iris is bicolored, with the upper half brownish red and the lower half grayish white. The first dorsal fin (including membrane) is gray; the second dorsal fin (including membrane) is also gray, but with black longitudinal streaks distally. The pectoral fin is grayish and semi-transparent. The pelvic fin is grayish white. The caudal fin is grayish red, with several black spots at its base.

Sumber: New records of six combtooth blennies in the genera Blenniella, Cirripectes, Istiblennius, and Salarias (Perciformes: Blenniidae) from Taiping Island, South China Sea