Classificatie / Names
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Geophaginae
Etymology: Dicrossus: Greek, di = two + Greek, krossoi = tassel (Ref. 45335); warzeli: Named for Frank Martin Warzel, a skilled German aquarist who collected the type specimens and who first imported the species from the Rio Tapajos to Germany, as well as observed its behaviour, including reproduction in the filed and in the aquarium.
Eponymy: Frank Martin Warzel (1960–2004) was a skilled German aquarist who, according to the authors: “…dedicated most of his life” to research on neotropical cichlids. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water benthopelagisch. Tropical
South America: endemic to the Tapajos River, Amazon River system in Brazil.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 6.0 cm SL mannelijk / geslacht onbekend; (Ref. 85095); 3.5 cm SL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 15 - 17; Dorsale zachte stralen (totaal) : 6 - 8; Anale stekels: 3; Anale zachte stralen: 6 - 7. Can be distinguished easily by its three longitudinal rows of dark grey to blackish, horizontally elongate, dash-like spots on the sides of the body; and caudal fin spatulate in adult males. Exhibits clear sexual size and color dimorphism (Ref. 85095).
Inhabits exclusively clear-water rivers. Juveniles measuring about 2.0 cm SL occur in small brooks with sandy bottoms and patches of leaf litter. Observed searching the bottom substrate for small invertebrates and detritus by picking up and turning the leaves. Collected only in very soft water (no detectable hardness) with high acidity, pH value mostly less than 4 (Ref. 85095).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Römer, U., I.J. Hahn and P.M. Vergara, 2010. Description of Discrossus foirni sp. n. and Dicrossus warzeli sp. n. (Teleostei: Perciformes: Cichlidae), two new cichlid species from the Rio Negro and the Rio Tapajós, Amazon drainage, Brazil. Verteb. Zool. 60(2):123-138. (Ref. 85095)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
Speciale rapporten
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Internetbronnen
Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00283 - 0.01852), b=3.13 (2.91 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
