Hippopotamyrus ansorgii ( Boulenger, 1905 )

Kramer, Bernd & Swartz, Ernst R., 2010, A new species of Slender Stonebasher within the Hippopotamyrus ansorgii complex from the Cunene River in southern Africa (Teleostei: Mormyriformes), Journal of Natural History 44 (35 - 36), pp. 2213-2242 : 2230-2231

Hippopotamyrus ansorgii ( Boulenger, 1905)

( Figure 1E)

Marcusenius ansorgii Boulenger 1905

Hippopotamyrus ansorgii: Taverne 1971a: 104 ; Taverne 1971b: 136; Taverne 1972: 170.

Material examined

See Material and methods section.

Type specimens

Syntypes: BMNH 1905.5.29.62–63 (2) .

Type locality

“Betweeen Benguella and Bihé”. Benguella district includes the highlands of Bihé ( Stieler 1910). The highlands are the origin of at least five major rivers flowing in all directions. The origin of the syntypes will therefore remain unclear until new evidence, possibly from historical notes, can be found giving more precise geographical information (an intensive search has so far been unsuccessful).

Diagnosis

nA, median 25 (range 24–26); nD, median 18.5 (range 18–19); SPc, median 16 (range 16–16); SLS, median 69.5 (range 67–72); LSo, mean 0.4365 (range 0.4259 –0.4470) of HL; BD, mean 0.1966 (range 0.1891 –0.240) of SL; HL, mean 0.2109 (range 0.2079 – 0.2139) of SL; PDL, mean 0.6444 (range 0.6347 –0.6542) of SL; PAL, mean 0.6118 (range 0.5990 –0.6245) of SL; pD, mean 0.3765 (0.3669 –0.3861) of SL .

Hippopotamyrus ansorgii species complex specimens of uncertain status

Marcusenius ansorgii Boulenger, 1905 . ZMH 1817 . ZMH 1817 , two specimens, Rio Cukimaala near north Lisboa (which has been renamed Huambo after 1975), a small tributary (headwater) of the Cunene in Angola, leg. Machado, 12 May 1961.

Marcusenius ansorgii Boulenger, 1905 . ZMH 1790 , two specimens, Rio Cuchi in Angola, a tributary of the Kubango (see map of Figure 2 ), no specific place given, leg. Ladiges and Voelker, 9 October 1961.

Hippopotamyrus ansorgii . SAIAB 67459 , 67461–67464 , 67467–67469 , 17 specimens, and ZSM 29790, 29792–29807 , 17 specimens from the Upper Zambezi River (Upper Zambezi morph, morph Ha 1) , East Caprivi, Namibia .

Hippopotamyrus ansorgii . SAIAB 67460 , 67465 , 67466 , 18 specimens , ZSM 29773–29789 , 29791 , 18 specimens from the Kwando River (Kwando morph, morph Ha3), Caprivi Strip, Kongola bridge .

Figures

Figure 2. Geography of the study area, with the sites Epupa Falls and Ruacana Falls on the Cunene River (lower Cunene morph), the Wenela site on the Upper Zambezi River (Upper Zambezi morph and Hippopotamyrus szaboi) and the Kongola site on the Kwando River (Kwando morph).