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> Siluriformes (Catfishes) > Loricariidae (Armored catfishes) > Delturinae
Etymology: Hemipsilichthys: Greek, hemi = half + Greek, psilos = hairless + Greek, ichtys = fish (Ref. 45335); nimius: From the Latin nimius meaning nimiety, in allusion to the supernumerary rays of the dorsal fin, which has nine branched rays (Ref. 50588).
More on authors: Pereira, Reis, Souza & Lazzarotto.

Environment: milieu / climate zone / depth range / distribution range Ökologie

; süßwasser demersal. High altitude

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South America: Perequê-Açu and Taquari river basins, southeastern Brazil. Collected in localities between 100 and 370 m above sea level.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 10.5 cm SL Männchen/unbestimmt; (Ref. 50588)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 7 - 9; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 6. Eight (rarely 7 or 9) branched rays in the dorsal fin; dorsal-fin membrane expanded posteriorly, connecting proximal half of the last dorsal-fin ray to the dorsum; teeth cusps equal in size (Ref. 50588).

Type specimens were collected in small coastal streams flowing through well-preserved Atlantic forest; in localities between 100 and 370 m a.s.l., always in rocky substrate with fast flowing, clear water, under direct sunlight, and depths between 10 and 50 cm. Underwater observations indicate that this species is most active during the night, grazing on the bottom (Ref. 57859).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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Pereira, E.H.L., R.E. Reis, P.F.M. Souza and H. Lazzarotto, 2003. A new species of the loricariid catfish genus Hemipsilichthys from southern Rio de Janeiro coastal rivers, southeastern Brazil. Zootaxa 285:1-10. (Ref. 50588)

IUCN Rote Liste Status (Ref. 130435: Version 2024-2)

Gefährdung zunehmend (NT) (B2b(iii)); Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

Fischereien: nicht kommerziell

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00537 (0.00203 - 0.01424), b=3.13 (2.90 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Widerstandsfähigkeit (Ref. 120179): hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Hemipsilichthys nimius Pereira, Reis, Souza & Lazzarotto, 2003