After Monte Alén, the highest mountain in Equatorial Guinea (1250 m). Occurs at the southeastern foot of this mountain at an altitude of around 690 metres.

Malumbres, F.J., Sonnenberg, R. & Van der Zee, J.R. 2022.

Three new killifish species (Cyprinodontiformes: Nothobranchiidae) from Equatorial Guinea.

Graellsia, 78(2): e173. https://doi.org/10.3989/graellsia.2022.v78.346

Holotype male - 37·3 mm SL. Paratypes - 2 males and 2 females, 35.1–19.5 mm SL.

Synonyms

• Aphyosemion maculatum – American Killifish Association, no date.
• Aphyosemion maculatum – Huber, 2007.
• Aphyosemion aff. maculatum – Ott, 2019: 41.

Populations

• GEMPG 18-19
• GEGVPO 18-6
• GEGVPO 18-7
• GEMLBJ 03-33
• GEMLBJ 03-31 (cf.montealenense)

Equatorial Guinea, Centro Sur province, stream Binogo affluent of Rio La.a, a left bank tributary of Rio Wele, just west of the village of Moka, collected on 5 December 2018 by F. Malumbres, J. G. Povez and D. Gonzalez, Field code GEMPG18-19 (from first description).

Restricted to a small area just southeast of Monte Alén in central Equatorial Guinea. All collections were made 2–3 kilometers southeast of this mountain along the road from Niefang to Bicurga. It is not unlikely, however, that it also occurs east and west of the present distribution area, since no collections were made there. North and south of the distribution area was frequently sampled and no further occurrence of M.montealenense was found (from original description).

Slowly running shallow clear water; pH 6·5; conductivity 3 Microsiemens, water temperature 22·5ºC.