Nothobranchius prognathus

Nothobranchius prognathus Costa, 2019

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> Cyprinodontiformes (Rivulines, killifishes and live bearers) > Nothobranchiidae (African rivulines)
Etymology: Nothobranchius: Greek, nothos = false + Greek, brangchia = gill (Ref. 45335)prognathus: Name from the Latin prognathus, referring to the distinctive lower jaw of the new species that is anteriorly projected slightly beyond the upper jaw; an adjective (Ref. 119668).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water pelagisch. Tropical

Verspreiding Gebieden | FAO regio's | Ecosystemen | Voorkomen | Verspreidingskaart | Introducties | Faunafri

Africa: upper Wami River in eastern Tanzania (Ref. 119668).

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 4.4 cm SL mannelijk / geslacht onbekend; (Ref. 119668)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 15 - 16; Anale stekels: 0; Anale zachte stralen: 17 - 18. Diagnosis: Nothobranchius prognathus differs from all other species of the Nothobranchius melanospilus complex in possessing lower jaw anteriorly projecting beyond upper jaw vs. not projecting; pelvic fins medially united in males vs. bases just in contact, but not united; and presence of three longitudinal series of scales on frontal region vs. two (Ref. 119668). It is also distinguished from all other species of the N. melanospilus complex by the combination of the following morphological character states: dorsal-fin origin anterior to anal-fin origin in both sexes vs. posterior in N. melanospilus; anterior supraorbital series of neuromasts divided in two sections vs. arranged in a single continuous row in N. melanospilus; mandibular neuromasts 14-16 vs. 17-21 in N. melanospilus; in females, few dark spots on anterior part of flank vs. dots absent on anterior part in N. melanospilus; body depth 32.7-35.5% of standard length in males, 32.1-33.4% of standard length in females vs. 27.5-32.2% and 27.1-30.9% of standard length in N. melanospilus and 28.7-30.9% and 25.8% of standard length in N. kwalensis; dorsal-fin base length 27.9-29.9% of standard length in males, 23.5-25.0% of standard length in females vs. 24.6-27.9% and 19.9-23.4% of standard length in N. melanospilus and 24.1-27.3% and 2.9% of standard length in N. kwalensis; head depth 90.4-99.2% of head length in males, 85-6-90.3% of head length in females vs. 78.0-87.8% and 74.6-80.7% of head length in N. melanospilus and 79.0-82.9% and 69.5% of head length in N. kwalensis; eye diameter 20.9-25.9% of head length in males, 21.1-24.4% of head length in females vs. 26.8-28.4% and 27.1% in N. kwalensis (Ref. 119668).
Body shape (shape guide): fusiform / normal; Cross section: compressed.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Costa, W.J.E.M., 2019. Two new species of seasonal killifishes of the Nothobranchius melanospilus species complex from the East Africa biodiversity hotspot (Cyprinodontiformes: Aplocheilidae). Vert. Zool. 69(1):73-82. (Ref. 119668)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Gevoelig (NT) (B1b(iii)+2b(iii)); Date assessed: 18 May 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00603 (0.00250 - 0.01453), b=3.13 (2.93 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.2   ±0.4 se; based on size and trophs of closest relatives
Kwetsbaarheid van de visserij (Ref. 59153):  Low vulnerability (10 of 100). 🛈