Classification / Names
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Characiformes (Characins) >
Anostomidae (Headstanders)
Etymology: Megaleporinus: Name from Greek 'mega' meaning large or largest, plus Leporinus, the genus which most species (now in this genus) were previously assigned; refrring to the large size of most congeners; piavussu: The specific name piavussu is in reference to the common name of the species in upper Rio
Paraná basin, 'piavuçu' or 'piavussu', which in indigenous language is a compound name meaning 'piava', term used to designate fishes of the genus Leporinus , and 'ussu' ou 'uçu' a radical that means big, that is, a big sized Leporinus species.
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
; น้ำจืด กลุ่มสัตว์หน้าดิน,กลุ่มสัตว์พื้นท้องน้ำ. Tropical
South America: endemic to the upper Rio Paraná, Brazil.
ขนาด / น้ำหนัก / Age
Maturity: Lm ? range ? - ? cm
Max length : 38.0 cm SL เพศผู้/กระเทย; (Ref. 93038)
Short description
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ก้านครีบอ่อนที่หาง (รวม) : 12; ก้านครีบอ่อนที่ก้น: 10 - 13. Distinguished from all species of Leporinus except, L.amblyrhynchus, L. conirostris, L. desmotes , L. despaxi, L. elongatus , L. jatuncochi , L.macrocephalus, L. muyscorum, L. obtusidens, L. reinhardti, L. trifasciatus and L. wolfei, by possessing three teeth on premaxilla and dentary (vs. tooth formulae 3/4, 4/4 or 4/3). Can be separated from from L. amblyrhynchus, L. conirostris, L. desmotes, L. despaxi, L. jatuncochi, L. macrocephalus, L. muyscorum, L. reinhardti, L. trifasciatus, and L. wolfei by having three dark rounded blotches on the body and dark transverse bars usually persistent in large specimens (vs. body with a dark midlateral stripe in L. amblyrhynchus, and L. despaxi; transverse dark bands in L. desmotes and L. jatuncochi; body pale except for a single dark blotch on caudal peduncle in L. conirostris; first blotch, below the dorsal fin, transversely elongated in L. macrocephalus, L. trifasciatus and L. wolfei; transverse bars faded in large specimens of L. muyscorum; and blotch on the caudal peduncle longitudinally elongated, not rounded, sometimes making contact with the second blotch in L. reinhardti). Differs from L. elongatus by having 16 circumpeduncular scale rows (vs.12); from very similar species L. obtusidens by having 39 to 40, exceptionally 41, perforated scales on the lateral line (vs. 41 to 43, rarely 44). Individuals of Leporinus piavussu particularly discriminate from individuals of L. piavussu from the upper Rio Paraná basin by having a terminal mouth, its cleft above the horizontal through the ventral orbital margin (vs. mouth directed somewhat or entirely downward, its cleft at the horizontal through the ventral orbital margin or below) (Ref. 93038).
Distinct pairs breed on densely grown weedy places (Ref. 205).
Life cycle and mating behavior
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Distinct pairs breed on densely grown weedy places (Ref. 205).
Ramirez, J.L., J.L.O. Birindelli and P.M. Galetti Jr., 2017. A new genus of Anostomidae (Ostariophysi: Characiformes): Diversity, phylogeny and biogeography based on cytogenetic, molecular and morphological data. Molecular Phylogenetics and Evolution, 107: 308-323. (Ref. 113781)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
เครื่องมือ
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