Klassifizierung / Names
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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypostominae
Etymology: Hypostomus: Greek, hypo = under + Greek, stoma = mouth (Ref. 45335).
Eponymy: Orestes Hawley Saint John (1841–1921) was a geologist whose major interest was the fossil fishes of the Palaeozoic. [...] (Ref. 128868), visit book page.
More on author: Steindachner.
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser demersal. Tropical
South America: Brazil.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 15.7 cm SL Männchen/unbestimmt; (Ref. 133155)
Kurzbeschreibung
Bestimmungsschlüssel | Morphologie | Morphometrie
Rückenflossenstacheln (insgesamt) : 2; Rückenflossenweichstrahlen (insgesamt) : 7; Afterflossenweichstrahlen: 4. This species is distinguished by the following characters: high number of teeth on premaxillary (60-110) and dentary (65-115); teeth bicuspid, with asymmetric cusps; eyes small, orbital diameter 12.7-17.2% in HL and 27.8- 45.6% in interobital width; abdominal platelets more clustered on laterals of abdomen; one predorsal plate bordering supraoccipital; no hypertrophied odontodes on flanks. Colouration: dorsal and lateral body surfaces and fins light brown; head with very closely spaced small, dark spots; trunk with spots slightly larger than on head and forming somewhat longitudinal rows; interradial membranes of fins, except anal fin, with dark brown spots similar to those of the trunk forming 5-8 diagonal lines (from base to distal margin); anal fin light brown, spots, if present, faint and in low number; abdominal region light brown, with most individuals without spots on abdomen, some with dark brown spots irregularly scattered on entire abdomen; caudal peduncle without spots on its ventral surface (Ref. 133155).
Cross section: oval.
Facultative air-breathing in the genus (Ref. 126274)
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
Ramos, T.P.A., C.H. Zawadzki, R.T.C. Ramos and H.A. Britski, 2017. Redescription of Hypostomus johnii, a senior synonym of Hypostomus eptingi (Siluriformes: Loricariidae), northeastern Brazil. Neotropical Ichthyol. 15(2)e160064:1-10. (Ref. 133155)
IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: nicht kommerziell
Tools
Zusatzinformationen
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Internet Quellen
Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01585 (0.00726 - 0.03460), b=2.95 (2.78 - 3.12), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Widerstandsfähigkeit (Ref.
120179): mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei (Ref.
59153): Low vulnerability (10 of 100).
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