Nimbapanchax leucopterygius Sonnenberg & Busch, 2009

N.leucopterygius. Photo courtesy of Ed Pürzl

Meaning of Name

After the white margin of the anal. Taken from the Greek - leucos meaning white & pterygion meaning fin or wing.

First Description


Holotype - Male, 43·6mm Standard length (SL) - 6 cm TL.


D=10-14, A=15-18, ll=28-30 + 3-4. Sonnenberg & Busch 2009.

  • D = 11, A = 15, ll = 30 (Poll 1941)(maeseni)
  • D = 11-14, A = 15-16, D/A = +5-9, ll = 28-31(+1-3) (Berkenkamp & Etzel 1977)(maeseni)
  • D = 9-14, A = 14-18, ll = 27-34 (Radda & Pürzl 1987)(maeseni)

n = 21, A = 26 (Scheel 1990) (maeseni)




  • Aphyosemion cameronensis var. obscurus (non Ahl 1924)
  • Aphyosemion liberiense (non Boulenger 1908)
  • Aphyosemion maeseni non Poll 1941
  • Archiaphyosemion maeseni (non Poll 1941)
  • Roloffia maeseni (non Poll 1941)


  • GF06 / 6
  • GRC90 / 174 - Lola
  • Gouessesso (western Ivory Coast/Guineé)
  • Gueupleu (Ivory Coast)
  • Lema (Lama?)(Ivory Coast)
  • Likado
  • Lola (Guineé) GRC 90 / 174
  • Maliki (Liberia)
  • Man
  • Masei River (Ivory Coast)
  • Mount Nimba (area)
  • N'zerekore (Guineé)
  • Saglepie (Liberia)
  • Salayea (Liberia)
  • Saniquellie (Liberia)
  • Souba (Ivory Coast)
  • T'chiens (Liberia)
  • Wadalna (Liberia)
  • Zor Zor (Liberia)

Archiaphyosemion aff. maeseni

  • Beh ple (northeastern Liberia)

Likado - Alf & Anitas site.

Lola - GRC 90 / 174 -

GRC 90 / 174 - Lola
Photo courtesy of Christian Cauvet.

Lola - Collected by Christian Cauvet & Raymond Romand in 1990 & distributed as GRC 90 / 174.

Masei River (Type locality) - Collected by Poll in 1941.

Mount Nimba (area) - Collected by Daget in 1948.

N'zerekore - Collected by Olsen in 1963-64.

Pellegrin is known to have collected in western Ivory Coast in 1934. Also, Etzel & Putz collected them from an unknown location.


It's interesting in viewing a photo online from a German site when asking for an online translation it turns GF into AP.

Type Locality

A small, slow flowing creek in rainforest, coverered by tree canopy. Water was slightly brown stained, water temperature 20° C, maximum water depth 40cm.


Inhabits a large area in northeastern Liberia, southwestern Guinea & western Ivory Coast.
Middle Sassandra River drainage, western Ivory Coast. Upper Saint Paul, upper Saint John & upper Cess River drainages, northern Liberia, Upper Saint John & Milo River drainages, eastern Guinea.


Small streams, brooks & pools in areas of forested savannah.

Distinguishing Characteristics This is a robust species of rather drab colouration. The anal fin has a light blue border in the outer margin. The fish distributed as aff.maeseni has a red border in place of this light blue. Also, the anal has no markings, whereas maeseni has a spotted pattern in this fin.
Can be confused with Nimbapanchax melanopterygius. This species has no outer margin of pale blue in unpaired or ventral fins. Instead this outer margin is a deeper blue.
Colour/Pattern Variability Low

The holotype was collected at Foret Classeé de Dieke, southeastern Guinea by E.Busch & B.Wiese on 16th May 2006. This was collection code GF06 / 6.
Paratypes were collected by H.Olsen between November 1963 - February 1964 at N'zerekore, Guinea. Also E.Roloff in 1971 Salayea, Liberia. Also H.De Bruyn on 24th July 1980 in a rivulet near Déoulé, a small tributary of the Kilo River on a secondary road from Man to Biankouma, Ivory Coast.

History of the synonym Aphyosemion maeseni
First description - Poll M. 1941. Poissons nouveaux de la Cote d'Ivoire. Revue de Zoologie et de Botanique Africaines 34 (2): p 141-142, figure 5.
After Arne Maesen who participated in the collection of this species.
In 1941 Poll described Aphyosemion maeseni from a single specimen, probably a male, collected at the confluense of the Masei & Bon de Boan Rivers which feed into the Noun River at the border of Liberia & Ivory Coast. The fish was collected in 12-13 April 1939 by A.Maesen, F.M.Olbrechts & P.J.Vandenhoute.
Sonnenberg & Busch examined this holotype which turned out to be an Epiplatys sp. which invalidated the original description as Aphyosemion maeseni.
A new species was described under the new genus Nimbapanchax.
Scheel mentions in ROTOW 1 that no other material was published to date (at least until 1968).
Type Locality - Given as 'Confluence between the Masei River & the Bon de Boan River, a tributary of the Noun River, near the border with Liberia, western Ivory Coast' according to Wildekamp (World of Killies Vol I).

Breeding Notes

Reportedly not an easy species to breed. Eggs water incubate for around 14 days. Sexual maturity is reached at about 6 months.

Diameter of Egg

Thanks to Rainer Sonnenberg for sending the paper 'Description of a new genus & two new species of killifish (Cyprinodontiformes: Nothobranchiidae) from West Africa, with a discussion of the taxonomic status of Aphyosemion maeseni Poll, 1941' Sonnenberg & Busch.