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Aequidens sp. 'Jenaro'

Home Forums Fresh and Brackish Water Fishes Aequidens sp. 'Jenaro'

This topic contains 0 replies, has 1 voice, and was last updated by  Erlend D Bertelsen 6 years, 8 months ago.

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #301688

    Matt
    Keymaster

    Can anyone shed some light as to what this might be or be related to? The only map reference to ‘Jenaro’ I can find is Jenaro Herrera district in Requena Province, Peru which would suggest Río Ucayali drainage?

    All pics © Enrico Richter – thanks to him for letting us use them.

    Attached files

    #345148

    coelacanth
    Participant

    Aequidens “Jenaro Herrera” was what these were always sold as. They’ve been variously suggested to be A. tetramerus, A. metae, A. pallidus or A. diadema, currently it’s thought they are closest to A. diadema but there are apparently behavioural and reproductive ecology differences, therefore best to call them aff. diadema . Lovely fish but can be more than a bit nowty.

    #345172

    Matt
    Keymaster

    Aha, thanks for the tip off sir, having checked that ties in with info given in Kullander (1986) in which it’s stated that A. diadema is in fact collected from the area around Jenaro Herrera.

    Any additional info on the purported behavioural/ecological differences you mention?

    #345191

    coelacanth
    Participant

    Well, although I’ve had this fish on more than one occasion in the past, I’ve never bred them due to never having one of each gender at one time, so my info. is just what I’ve gathered second-hand. True diadema are delayed mouthbrooders, where as these are substrate spawners. There are also colour differences, but I have no details of exactly what these are.

    #345200

    Matt
    Keymaster

    Interesting, something like the differences observed in some sympatric Geophagus I think?

    #345212

    coelacanth
    Participant

    Apparently not sympatric, this form replaces diadema in that particular area, IIRC they were originally IDed as diadema by Kullander but with mention that there were some morphological differences, the behavioural observations by aquarists provides further evidence that they are in fact a separate but closely related taxon.

    #345221

    Matt
    Keymaster

    Ok thanks, v. useful.

    #347267

    Erlend D Bertelsen
    Participant

    A while ago I got a shipment of Aequidens sp. from Peru I was not sure abouth. I now beliwe they are Aequidens sp. “Jenaro Herrera”.

    Agree or not?

    E

    Attached files

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