All I know is, compared to other knives, this thing is like the black sheep of the family. elongated dorsal instead of anal fin, finger clipping teeth, fast, etc, can anyone fill me in on where they fit evolutionarily on that family tree?
how do aba aba knives... work?
- Thread starter Hybridfish7
- Start date
So the aba aba knifes are in the order Osteoglossiformes which include but not limited too arrowanas,arapaimas,asian knifes,south American knifes, and lastly the mormids. Contrary too what its name states its actually not closely related to the knife but its actually a mormid and the way its shaped and evolved is perfect for it too survive harsh fast waters of the nile also its scientific name is Gymnarchus niloticus.
And also if my latin is correct the scientific name means is exercise bow from the nile but remeber I don't speak latin so if its wrong its not my fault.
Very close
Gymnarchus Cuvier 1829 gymno-, naked; archus, anus, referring to absence of fins behind anus and under tail
https://en.wikipedia.org/wiki/Osteoglossiformes This page has a nice tree to show it.
Bony tongue Knifefish and mormyrid-type fish split off together, from which the group split into mormyrids and the monotypic family containing the aba aba. Most likely adapted to be a more vicious piscivore than it's cousins. A bit of an evolutionary oddity, much like the African butterfly fish that spread off long before the rest of ancient fish
Bony tongue Knifefish and mormyrid-type fish split off together, from which the group split into mormyrids and the monotypic family containing the aba aba. Most likely adapted to be a more vicious piscivore than it's cousins. A bit of an evolutionary oddity, much like the African butterfly fish that spread off long before the rest of ancient fish
Too bad I didn’t get it right but honestly this makes more sense then what I translated. LOLVery close
Gymnarchus Cuvier 1829 gymno-, naked; archus, anus, referring to absence of fins behind anus and under tail
The South American knifefishes form their own order Gymnotiformes that's not closely related to the Osteoglossiformes. Gymnotiformes are part of the huge group Ostariophysi, which includes catfishes and characiformes.
So both the Osteoglossiformes and Gymnotiformes independently evolved their electric senses. Aside from its unusual shape compared to the mormyrids, Gymnarchus is the only one of the African electric fish to have a wave-type electric discharge (as opposed to pulses), which is found in about half of the South American knives.
So both the Osteoglossiformes and Gymnotiformes independently evolved their electric senses. Aside from its unusual shape compared to the mormyrids, Gymnarchus is the only one of the African electric fish to have a wave-type electric discharge (as opposed to pulses), which is found in about half of the South American knives.
