Fishes of the Indo-Pacific genus Eviota with descriptions of eight new species (Teleostei: Gobiidae). Fishes of the Indo-Pacific genus Eviota with descriptions of eight new species (Teleostei, Gobiidae). Descriptive data on the nominal species were also incomplete and inaccurate, partly due to the small size of these fish.
Counts of the number of pelvic fin rays were inaccurately recorded, the small fifth ray often being overlooked. The purpose of this study is (1) to develop and analyze a set of characters useful in determining the species, (2) to transcribe and compare 20 valid nominal forms using this set of characters as a basis for the interpretation of the species . , (3) to describe as new 8 species that are either closely related to the nominal forms, or appear to be, based on general body shape and color pattern, and (4) to compare the geographic distributions of the 31 species in this study. PECTORALFIN RAYS.-The uppermost ray is considered the first ray of the pectoral fin, and those below are numbered consecutively, up to 19 rays.
SKULLS.-The lateral scale row count was made from the upper edge of the gill opening posteriorly to the scale overlying the end of the hypural base. Transverse scale rows were counted from the origin of the second dorsal fin, downward and posteriorly, to the anal fin.
PITO AITO
AOT AITO
Head sensory pore system without NA, PITO and IT pores; a large, dark spot in the middle of the caudal fin, the lower part of the spot extending posteriorly to the end of the fin; fourth pelvic-fin ray with many branches, modal 14, range 11-17; segments between branches of fourth pelvic fin almost always absent; without spinous dorsal fin extension (wide range, Red Sea eastward to central Oceania and Great Barrier Reef) E. DIAGNOSIS.—Pectoral fin rays 4-16 usually branched; spinous dorsal fin in males elongate or filamentous; fifth pelvic-fin ray small, usually two-tenths the length of fourth pelvic-fin ray; The first and second dorsal spines of males and females may be elongated and filiform, the longest reaching the end of the second dorsal fin; males and females at 13 mm SL may have filiform dorsal spines; the pelvic fins usually extend beyond the origin of the anal fin.
ETYMOLOGY. The specific name melasma is Greek and means black spot, and refers to the dark occipital spot on each side of the head. In some specimens, traces of the predorsal transverse bars are visible on the dorsal midline to approximately the origin of the second dorsal fin. Dark spots on the ventral midline: Typically six subcutaneous spots occurring along the ventral midline from approximately the base of the second anal fin ray to the end of the caudal peduncle.
Our numbers are: dorsal VI-I,8, anal 1,7, and the fifth ray of the pelvic fin is unbranched and about six-tenths the length of the fourth ray. These species differ in the extent of ray development of the fifth pelvic fin, three-tenths to five-tenths in E. Although many of the specimens in the type series are identified below as belonging to E.
Number of pelvic fin rays: Approximately one-third of specimens from the Lord Howe-Norfolk and Indonesia-Philippines populations have rudimen-. Five dark subcutaneous bars on the lower rear of the trunk from about the beginning of the anal fin to a vertical through the middle of the caudal peduncle, joined by 5 distinct, ventral median spots. Genital papilla in males not fimbriate, long and slender, may reach base of third ray of anal fin, slightly indented and bordered at tip.
The first four spines of the dorsal fin may be elongated or filamentous in both sexes, the second or third spine longest in males, extending to the end of the second dorsal fin base when depressed, and to the base of the eighth dorsal ray in females; pelvic fins long, extending beyond anal fin origin. Eviota parasites have a dark spot at the base of the caudal fin below the midline, which is absent in E.
Species Pectoral fin rays
Vertebrae 25 26 27
1abax
Species
Length of fifth pelvic fin ray
The taxonomic position of the Western Atlantic Goby, Eviota personata, with descriptions of two new related species. The Fishes of Samoa: Description of the Species Found in the Archipelago, with a Preliminary Checklist of the Fishes of Oceania. Fishes of the Genus Eviota from the Red Sea with descriptions of three new species (Teleostei: Gobiidae).
A revision of the Indo-Pacific fish genus Gobiopsis with descriptions of four new species (Pisces: . Gobiidae). Fishes of the Phoenix and Samoan Islands collected in 1939 during the expedition of the U.S. Manuscripts intended for serial publication receive substantive review within their originating Smithsonian museums or offices and are submitted to the Smithsonian Institution Press with the approval of the appropriate museum authority on Form SI-36.
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