Sternarchorhamphus muelleri

(Steindachner 1881) Eigenmann in Eigenmann and Ward 1905



Sternarchus (Rhamphosternarchus) muelleri  Steindachner 1881


Amazon River: freshwater


Lectotype: NMW 65328:1 260.5mm

Paralectotypes: NMW 65328:2 249.0mm

Ferraris et al. (2017) comment on these types: "apparently designated in Campos-da-Paz (1995: 35, 36), if not earlier". Which suggests that they were not totally sure that this is the correct citation for the typification.


Middle-lower Madeira, Juruá, Ucayali, Negro, Branco, Trombetas, Amazonas main channel, Capim, Araguari-Macari-Amapá, lower Orinoco, upper Orinoco, Apure (Dagosta and de Pinna 2019).


The genus Sternarchoramphus once contained two additional species (Sternarchorhamphus hahni Meinken 1937, now Rhamphichthys hahni (Meinken 1937) and Sternarchorhamphus macrostoma (Günther 1870), now Platyurosternarchus macrostoma (Günther 1870)). The first of these was removed from the genus by Campos-da-Paz and Paepke (1994), and the second by Mago-Leccia (1994). The genus is currently monotypic and is a member of the subfamily Sternarchorhynchinae Mago-Leccia 1978 and the tribe Sternarchorhamphini Albert 2001. According to Campos-da-Paz (1995) the monotypic genus Orthosternarchus is also in the subfamily and therefore they are sister genera but that this relationship is not yet fully known. Albert (2001) found that Sternarchohamphus muelleri is most closely related to Orthosternarchus tamandua of the species he studied thus supporting the subfamily and tribe placements of these species.

Conservation Status


Key References

Steindachner, F. Journal Article 1881 Beiträge zur Kenntniss der Flussfische Südamerika's (III) und Ichthyologische Beiträge (XI)
Eigenmann, C.H. and Ward, D.P. Journal Article 1905 The Gymnotidae
Mago-Leccia, F. Book 1994 Electric fishes of the continental waters of America
Campos-da-Paz, R. and Paepke, H.-J. Journal Article 1994 On Sternarchorhamphus hahni, a member of the rhamphichthyid genus Rhamphichthys (Ostariophysi: Gymnotiformes).
Campos-da-Paz, R. Journal Article 1995 Revision of the South American freshwater fish genus Sternarchorhamphus Eigenmann 1905 (Ostariophysi: Gymnotiformes: Apteronotidae), with notes on its relationships
Reis, R.E., Kullander, S.O. and Ferraris, C.J. Book 2003 Checklist of the freshwater fishes of South and Central America
Crampton, W.G.R. Book Section 2008 Diversity and adaptation in deep-channel Neotropical electric fishes
Crampton, W.G.R. Book Section 2011 An ecological perspective on diversity and distributions
Ivanyisky, S.J. and Albert, J.S. Journal Article 2014 Systematics and biogeography of Sternarchellini (Gymnotiformes: Apteronotidae): Diversification of electric fishes in large Amazonian rivers
Tagliacollo, V.A., Bernt, M.J., Craig, J.M., Oliveira, C. and Albert, J.S. Journal Article 2016 Model based total evidence phylogeny of Neotropical electric knife fishes (Teleostei, Gymnotiformes)
Ferraris, C.J., de Santana, C.D. and Vari, R.P. Journal Article 2017 Checklist of Gymnotiformes (Osteichthyes: Ostariophysi) and catalogue of primary types
Bernt, M.J. and Albert, J.S. Book Section 2018 Family Apteronotidae - Ghost knifefishes
Dagosta, F.C.P. and de Pinna, M.C.C Journal Article 2019 The fishes of the Amazon: Distribution and biogeographical patterns, with a comprehensive list of species
Crampton, W.G.R. Journal Article 2019 Electroreception, electrogenesis and electric signal evolution
Bernt, M.J., Tagliacollo, V.A. and Albert, J.S. Journal Article 2019 Molecular phylogeny of the ghost knifefishes (Gymnotiformes: Apteronotidae)