View data on Catalog of Fishes here.
There is no apparent sexual dimorphism in barbel characters. Barbel length appears first to increase relative to SL, from 24%–35% at 66–70 mm to 52%–57% at 118–130 mm, and then to decrease to 35%–49% at 134–153 mm. The axis of the stem is moderately darkly pigmented in most specimens, lightly or very darkly in a few. The pigment becomes much lighter toward the distal end and is usually absent well proximal to the bulb; in a few specimens pigment reaches all the way to the bulb. The distal projection is unpigmented. External chevron-shaped or roundish striated areas of the stem are unpigmented and become closely spaced distally, though not contiguous. Spherical to ovoid inclusions are present in most of the distal half of the stem in specimens larger than about 90 mm SL. These inclusions are small and widely spaced proximally, becoming somewhat larger and more crowded distally. Their size and number appear to increase with specimen size. In specimens smaller than 90 mm SL, the inclusions may or may not be apparent; if present they are few and small.
The terminal bulb tends to be quite slender proximally and to widen distally. The distal projection, when developed, is a small, more or less conical hump and may or may not contain a few inclusions. The bulb without its terminal projection decreases relative to SL from 0.8%–1.3% at less than 100 mm to 0.4%–1.0% at greater than 100 mm. Combining bulb and projection, the decrease is from 0.9%–1.6% to 0.4%–1.1%.
The postorbital organ is small in a 109-mm male, but enlarged (1.2% SL) in one of 110 mm and in all larger ones (120–152 mm). The enlarged postorbital is l.l%–2.0% SL and 50%–83% of fleshy orbit.
A single terminal bulb 0.4%-1.3% SL, its length more than twice its width, with a very short or no terminal projection (up to 25% of bulb length, not over 0.2 mm long). Bulb and projection combined 0.4%–1.6% SL. Barbel length 35%–57% SL, except in 1 young specimen. Axis of stem moderately pigmented proximally, usually becoming much lighter distally. External chevron-shaped or roundish striated areas unpigmented, becoming closely spaced distally. Spherical to ovoid inclusions present in distal half of stem, small and widely spaced proximally, becoming fairly crowded distally, difficult to discern in specimens smaller than about 90 mm SL. Middorsal paired spots between occiput and dorsal-fin origin 8, occasionally 7 or 9.
Known only from the vicinity of the Hawaiian Islands.
Gibbs RH, Jr, Clarke TA, Gomon JR. 1983. Taxonomy and distribution of the stomioid fish genus Eustomias (Melanostomiidae), I: Subgenus Nominostomias. Smithsonian Contributions to Zoology 380:1–139.
Eustomias curtatus is a member of the subgenus Nominostomias Reagan and Trewavas (1930). The following description applies to all member of Nominostomias.
Three well-developed, free pectoral rays. Seven pelvic rays. Barbel with slender stem having little or no external pigment (axis often pigmented), no row of dark spots, and no branches proximal to the terminal bulbs (E. multifilis may have a few short filaments on the stem near the bulb). One or 2 relatively small terminal bulbs, the distalmost with a projection or filament of variable complexity (the projection almost indiscernible in a few species). No wide ventral body groove posterior to pectoral-fin base (a narrow, shallow groove observed in some specimens). Photophore and vertebral counts high. Photophores in ventral series (IC) 69–80 (seldom fewer than 72, species modes mostly 75–78), in lateral series (OC) 63–73 (seldom fewer than 66, species modes mostly 69–72), VAV and VAL 15–21 (seldom fewer than 16, species modes 17–18 and 18–19, respectively). Vertebrae in continuous series 64–71 (seldom fewer than 65, species modes mostly 67–69). No paired photophores in lateral series. Number of teeth high: premaxillary 11–20, mandibular 14–29 in large specimens (fewer in many specimens less than 100 mm SL).
Counts of fin-rays, photophores, vertebrae, and teeth are of little use in distinguishing most species of Nominostomias, for even those species that show modal differences overlap the ranges of most other species.
None of the body proportions examined by Gibbs et al. (1983) showed convincing differences among species of Nominostomias. Differences in size or relative-growth patterns appeared to characterize a number of species for which few specimens were measured, but these are believed to be artifacts of sampling. The cloud of points of species with abundant measurements usually encompassed those of species with few measurements, and in those abundant species, isometric growth is indicated for almost every body part once metamorphosis is complete. The only body measurement to indicate allometric growth is the least caudal-peduncle depth, which decreases relative to SL.
Gibbs RH, Jr, Clarke TA, Gomon JR. 1983. Taxonomy and distribution of the stomioid fish genus Eustomias (Melanostomiidae), I: Subgenus Nominostomias. Smithsonian Contributions to Zoology 380:1–139.
Regan CT, Trewavas E. 1930. The fishes of the families Stomiatidae and Malacosteidae. Danish Dana Expedition 1920−22 6:1−143.
To at least 153 mm SL.
Central North Pacific [west of Oahu, Hawaiian Islands], 21°20'N, 158°20'W, depth 0-350 meters.
Holotype: USNM 224203.
Eustomias curtatus és una espècie de peix de la família dels estòmids i de l'ordre dels estomiformes.
És un peix marí i d'aigües profundes que viu fins als 1.000 m de fondària.[3]
Es troba a prop de Hawaii.[3][5]
Eustomias curtatus és una espècie de peix de la família dels estòmids i de l'ordre dels estomiformes.
Eustomias curtatus es una especie de pez de la familia Stomiidae en el orden de los Stomiiformes.
• Los machos pueden llegar alcanzar los 15,2 cm de longitud total.[1][2]
Es un pez de mar y de aguas profundas que vive hasta 1.000 m de profundidad.
Se encuentra cerca de Hawaii.
Eustomias curtatus Eustomias generoko animalia da. Arrainen barruko Stomiidae familian sailkatzen da.
Eustomias curtatus is een straalvinnige vissensoort uit de familie van Stomiidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1983 door Gibbs, Clarke & Gomon.
Bronnen, noten en/of referenties
