Classificatie / Names
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Siluriformes (Catfishes) >
Pseudopimelodidae (Bumblebee catfishes, dwarf marbled catfishes) > Pseudopimelodinae
Etymology: Rhyacoglanis: From the Greek words 'rhyax' (torrent) and 'glanis' (catfish), indicating a catfish inhabiting running waters in reference to its habitat (Ref. 128485); seminiger: Species name is an adjective from the Latin word 'semi' (half) and 'niger' (black), in reference to the dramatically contrasting light vs. dark coloration pattern (Ref. 128485).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal. Tropical
South America: Brazil.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 7.8 cm SL mannelijk / geslacht onbekend; (Ref. 128485)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 6; Anale zachte stralen: 5 - 6; Wervels: 32 - 33. This species can be distinguished from all it congeners by having the dark subdorsal and subadipose bands seamlessly conjoined (vs. completely separate or joined only dorsally and ventrally by narrow horizontal connecting extensions). It further differs from R. annulatus by a uniformly dark caudal-peduncle band (vs. band with an unpigmented central section) and 32-33 total vertebrae (vs. 34-35). It also differs from R. pulcher by fewer total vertebrate count (32-33 vs. 34-55). Additionally, it differs from R. epiblepsis by the pointed caudal-fin lobes (vs. rounded lobes), absence of very dark spots on the body (vs. such spotting) and faint serrations limited to the base of the anterior margin of the pectoral-fin spine (vs. well-developed serrations along the entire anterior margin) (Ref. 128485).
Found in very fast-flowing rapids with clear waters over a substrate composed almost exclusively of quartz sand and small rocks, with the river margins covered by riparian forest (Ref. 128485).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Shibatta, O.A. and R.P. Vari, 2017. A new genus of Neotropical rheophilic catfishes, with four new species (Teleostei: Siluriformes: Pseudopimelodidae). Neotropical Ichthyology 15(2):e160132. (Ref. 128485)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
