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Grasseichthys gabonensis  Géry, 1964

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Grasseichthys gabonensis
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drawing shows typical fish in this Family.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 輻鰭魚綱 (條鰭魚) > Gonorynchiformes (Milkfish) > Kneriidae (Shellears)
Etymology: Grasseichthys: Greek, grassos, -ou = stink, dirt + Greek, ichthys = fish (Ref. 45335).   More on author: Géry.

環境 / 氣候 / 範圍 生態學

; 淡水 底中水層性.    , preferred ?

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Africa: scattered localities in the Ivindo and the larger Ogowe basin of Gabon; reports from the central Congo basin refer to another species (Ref. 81636).

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL 雄魚/尚未辨別雌雄; (Ref. 42473)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 0; 背的軟條 (總數): 7-8; 臀棘 0; 臀鰭軟條: 9 - 10; 脊椎骨: 35 - 36. Diagnosis: very small and larval in appearance; body elongate, laterally compressed, shallow (body depth 17.9-20.0% SL in females and 15.2-17.9% SL in males); scaleless; head small (head length 18.0-22.7% SL), with small, terminal mouth and large eyes; teeth absent; interorbital distance narrow (11.9-12.9% HL); gill opening short and located above pectoral fin; pectoral fins positioned ventrally and often splayed out from the body in preserved specimens; caudal peduncle long, with keels of transparent tissue, apparently anterior extensions of caudal fin membrane, reaching forward on both dorsal and ventral edge (ventral extension is more developed); caudal fin forked, with 16 rays, including an unbranched ray on dorsal and ventral edge; fin spines lacking; 2 branchiostegal rays; body semi-translucent, with myomeres clearly visible; lateral line absent; epibranchial organ reduced or absent (Ref. 81636).

生物學特性     字彙 (例如 epibenthic)

Open water species, not burrying in sand; forms schools; spawns during the raining season, during which it may be very abundant, forming aggregations in open water areas in the swamps; females of 20-24mm carry about 40 round, ripe eggs of about 0.4mm diameter; males mature at a size of about 18mm total length (Ref. 91379).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚


主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Géry, J., 1965. Poissons du bassin de l'Ivindo. I - Les biotopes. Biol. Gabon. 1(4):375-384. (Ref. 91379)

IUCN 瀕危狀態 (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

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