Classification / 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
Οικολογία
; Γλυκού νερού βενθικό(ς). Tropical
South America: Brazil.
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 7.8 cm SL αρσενικό/απροσδιόριστο; (Ref. 128485)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Μαλακές ραχιαίες ακτίνες (συνολικά) : 6; Μαλακές εδρικές ακτίνες: 5 - 6; Σπόνδυλοι: 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).
Life cycle and mating behavior
Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (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).
Τροφικό Επίπεδο (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
