Pseudomugil inconspicuus Roberts 1978

Predorsal scale count 14 to 17. Sexual dimorphism not apparent in this species.

Dorsal spines (total): 3 - 4; Dorsal soft rays (total): 5 - 6; Analspines: 1; Analsoft rays: 10 - 12

Found in mangrove swamps and saline creeks. This is a planktivorous species which adapts well to freshwater environment. May occur in large schools, frequently in muddy waters. Sympatric with P. cyanodorsalis over part of its range (Ref. 9786).

Found in mangrove swamps and saline creeks (Ref. 9786, 44894). Occurs infringing coastal mangroves in brackish or marine waters. Aggregations shelter among submerged roots or inundated leaves and branches (Ref. 44894). This is a planktivorous species which adapts well to freshwater environment. May occur in large schools, frequently in muddy waters. Sympatric with P. cyanodorsalis over part of its range (Ref. 9786). Probably more widespread, but has escaped notice due to its small size and largely inaccessible habitat (Ref. 44894).

fisheries: of no interest

Pseudomugil inconspicuus

USNM 217162, Holotype, Fly 75–32, 21.0 mm.

USNM 217163, Paratypes, Fly 75–32, 75: 6.3–23.1 mm.

Pseudomugil inconspicuus is a slender-bodied species, probably transparent in life, with only slight sexual dimorphism in the fins. Mouth relatively small and narrow, only about one-third as wide as head; gape relatively restricted, maxillomandibulary ligament attached far anteriorly on lower jaw; only one-third of lower jaw extending anterior to rictus when mouth fully opened; ramus of lower jaw considerably elevated posteriorly; premaxillary bone with an accessory ascending process (absent in all other Pseudomugil?); maxillary bone moderately stout (Figure 29c). Each side of upper jaw with a single row of 8–10 small teeth extending laterally from symphysis, this row continued by 6–8 greatly enlarged teeth curving outward from side of mouth; posterior third of upper jaw toothless; each side of lower jaw with one or two close-set, irregular rows totalling 8–20 very small teeth anteriorly; posterior two-thirds of lower jaw toothless (Figure 29c). First gill arch with 2 + 9 gill rakers. Pharyngeal teeth conical, somewhat enlarged posteriorly but not so much as in P. novaeguineae. Scales in lateral series 28–29; dorsomedian scales between occiput and origin of first dorsal fin 14–16; ventromedian scales between base of cleithrum and origin of pelvic fins only 7; peduncular scales only 6–7. First dorsal fin relatively small, with 3–4 spines, its origin posterior to a vertical line through base of first anal fin ray. Second dorsal fin I 41/2–51/2. Anal fin ii 10–111/2. Pectoral fin 11–12. Principal caudal fin rays 6–7 + 7. Pelvic girdle attached to sixth rib. Free vertebrae 30. Slight sexual dimorphism of fins involving dorsal and anal fins only: in mature males first dorsal fin slightly larger than in females (sometimes with a short filamentous extension); second dorsal fin with short filamentous extension. Color in life not observed; body presumably transparent. Preserved specimens have relatively little pigmentation compared to other Pseudomugil. A uniformly thin, uninterrupted, longitudinal line of black pigment extends from just above origin of first pectoral fin ray to base of caudal fin. Side of body ventral to longitudinal pigment line almost entirely lacking melanophores except near bases of pectoral, anal, and caudal fins. Peritoneum entirely or almost entirely clear, without melanophores. Median fins with melanophores parallel to leading edges and near tips of rays, otherwise clear (probably colorless in life). Lateral half of pelvic fins with scattered melanophores.

Pseudomugil inconspicuus does not seem particularly closely related to any previously described Pseudomugil. Pseudomugil tenellus Taylor, 1964, known only from the vicinity of Oenpelli in the interior of Arnhem Land, differs markedly from P. inconspicuus and other species I have examined in having serially arranged tricuspid pharyngeal teeth and peritoneum densely pigmented (probably entirely black in life), characters suggestive of adaptation to phytophagy. The shape of the premaxillary bone, the tooth-bearing margin of which is strongly notched (Figure 29d), also differs markedly from that in other Pseudomugil I have examined. Although higher classification is beyond the scope of the present contribution, it is worth noting that Pseudomugil may be near the ancestral stock of those highly specialized Southeast Asian atherinomorphs, the Phallostethoidea, and that P. inconspicuus is superficially at least more similar to phallostethoids than any other Pseudomugil.

The inconspicuous blue-eye (Pseudomugil inconspicuus) is a species of fish in the subfamily Pseudomugilinae. It is found in Papua New Guinea and Australia's Top End.

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Pseudomugil inconspicuus Pseudomugil generoko animalia da. Arrainen barruko Pseudomugilidae familian sailkatzen da.

黏滑似鯔銀漢魚，為輻鰭魚綱銀漢魚目似鯔銀漢魚科的其中一種，分布於澳洲北部及新幾內亞南部淡水流域，體長可達3.5公分，為熱帶淡水魚，棲息在溪流、沼澤底中層水域，成群活動，生活習性不明，可做為觀賞魚。