Ah, misunderstood you for a minute. Yeah, that first diagram shows the evolutionary progression pretty well. It also shows how they're all distantly related, which is cool.
Which is the most primitive freshwater fish species?
- Thread starter Ichthyotopia
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Okay, here's a phylogeny that I copied from the previously mentioned book:
As you can see, Polypteriformes (reedfishes and bichirs) is the most basal, e.g. primitive, of the pictured groups of fishes. Next comes Ancipenseridae (sturgeons) and Polyodontidae (paddlefishes), and those are followed by Semionotiformes (gars and their extinct relatives). Amiiformes (bowfin) is the last group of fishes before Teleostei, which is comprised of the remaining 96% of the fishes.
EDIT: It appears that I was uploading this post as similar diagrams were being posted. Yay for more info!
As you can see, Polypteriformes (reedfishes and bichirs) is the most basal, e.g. primitive, of the pictured groups of fishes. Next comes Ancipenseridae (sturgeons) and Polyodontidae (paddlefishes), and those are followed by Semionotiformes (gars and their extinct relatives). Amiiformes (bowfin) is the last group of fishes before Teleostei, which is comprised of the remaining 96% of the fishes.
EDIT: It appears that I was uploading this post as similar diagrams were being posted. Yay for more info!
It should be noted that the phylogeny that I posted is the one that is most commonly accepted and taught while the one from Primitive Fishes is actually the more accurate from a genetic standpoint.
Here's a diagram of that phylogeny in order to hopefully make it a bit more clear:
Cladistia = bichirs and reedfishes, Chondrostei = sturgeons and paddlefishes, Ginglymodi = gars, Halecomorphi = bowfin, Teleostei = the rest of the fishes.
Indeed, we could do that.
Here's a diagram of that phylogeny in order to hopefully make it a bit more clear:
Cladistia = bichirs and reedfishes, Chondrostei = sturgeons and paddlefishes, Ginglymodi = gars, Halecomorphi = bowfin, Teleostei = the rest of the fishes.
Indeed, we could do that.
lol yeah ,but its all real interesting. thanks for all the info
so does this mean that freshwater stingrays represent the most ancient fish in the hobby?
so does this mean that freshwater stingrays represent the most ancient fish in the hobby?
Well, some people have kept lampreys before (I know that I have), but, yes, freshwater stingrays are definitely the most ancient fishes that are commonly kept.
I just found my Jurassic Fishes book, it has a lot of interesting info about the timeline of fish evolution.
are there any other freshwater Chondricthyes that ppl keep?
really u've had lampreys? how does that work? ive heard they are parasite like
really u've had lampreys? how does that work? ive heard they are parasite like
As far as I know, no one keeps any of the other freshwater Chondricthyes.
Yes, I had some least brook lampreys (Lampetra aepyptera) that I caught during the Ichthyology class that I took last summer around this time. I had them for a few weeks before most of them expired; I fed the rest of them to my gars and bichirs since I knew that the rest would die soon, too. These ones are non-parasitic and were filter-feeders that mostly stayed buried in the sand in their aquarium, so they definitely were not the most exciting fishes that I've ever owned.
