Classificazione / Nomi
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Cichlasomatinae
Etymology: Krobia: Vernacular name of different fishes in Surinam (Ref. 45335); petitella: Named from the Latin petitus, reaching out for or inclining towards, in reference to the lateral band spots lying adjacent to the upper lateral line anteriorly and intercepting posteriorly. An adjective in feminine form.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce benthopelagico; pH range: 4.2 - 7.1. Tropical; 25°C - 33°C (Ref. 93940)
South America: Berbice River drainage in Guyana.
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 10.2 cm SL maschio/sesso non determinato; (Ref. 93940)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Spine dorsali (totale) : 12 - 14; Raggi dorsali molli (totale) : 9 - 11; Spine anali: 3; Raggi anali molli: 7 - 8; Vertebre: 24 - 25. This species differs from all its congeners (Krobia guianensis Regan, K. itanyi Puyo and K. xinguensis Kullander) as well as the closely related ‘Aequidens’ potaroensis and ‘A’. paloemeuensis by tubed scales of the upper lateral line extending caudally into a line bisecting the lateral band blotches posterior to the mid-lateral spot. It can be further distinguished by the anterior lateral band spots lying immediately ventral to the upper lateral line, instead of being separated from the upper lateral line by a complete row of scales in all other species. It also possesses a unique lateral coloration pattern formed by the combination of six vertical bars and four lateral band spots (vs. 5 bars/3 or 4 spots in K. itanyi, 5/5 in K. guianensis, 7/6 in K. xinguensis, 6/6 in ‘Aequidens’ potaroensis, 5/5 in ‘A’. paloemeuensis). It can be further diagnosed by the combination of the following characters: separation of the caudal spot on the dorsal caudal fin lobe from the lower lateral line by one scale length; lacking a lateral band spot in bar 2; presence of two distinct interorbital stripes and a prominent preorbital stripe; significantly longer snout and longer fins than K. guianensis on average; lateral band extending to the posterior base of the dorsal fin; and lacking anterolateral spots on the lower jaw and a lateral band blotch located in the second vertical bar as seen in K. xinguensis in addition to having a longer snout and shallower body than K. xinguensis on average. It differs from ‘Aequidens’ potaroensis and ‘A.’ paloemeuensis by lacking lateral band spots on the caudal peduncle; and from ‘A.’ potaroensis by having a significantly deeper head, body and caudal peduncle as well as longer fins on average (Ref. 93940).
Body shape (shape guide): fusiform / normal.
Collected from a black water river with pH ranging from 4.2-7.1, conductivity of 2.0-39.0 μS , temperature of 25.0-33.3°C, current velocity typically ranging from 0.1-0.3 m/s, dissolved oxygen of 5.1-6.7 mg/L and Secchi depth 0.7-1.0 m (Ref. 93940).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Steele, S.E., E. Liverpool and H. López-Fernández, 2013. Krobia petitella, a new species of cichlid fish from the Berbice River in Guyama (Teleostei: Cichlidae). Zootaxa 3693(2):152-162. (Ref. 93940)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Strumenti
Rapporti speciali
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Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02188 (0.01025 - 0.04670), b=3.05 (2.87 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
Resilienza (Fonte Biblio.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.).
Vulnerabilità della pesca (Ref.
59153): Low vulnerability (10 of 100).
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