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Aequidens sp. 'Jenaro'
September 2, 2011
3:39 pm
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Matt
Málaga, Spain
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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.

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Cake or death?
September 2, 2011
3:49 pm
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coelacanth
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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.

September 5, 2011
8:26 am
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Matt
Málaga, Spain
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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?

Cake or death?
September 5, 2011
4:55 pm
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coelacanth
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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.

September 6, 2011
7:30 am
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Matt
Málaga, Spain
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Interesting, something like the differences observed in some sympatric Geophagus I think?

Cake or death?
September 6, 2011
4:02 pm
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coelacanth
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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.

September 7, 2011
6:56 am
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Matt
Málaga, Spain
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Ok thanks, v. useful. /thumbs_up.gif" style="vertical-align:middle" emoid=":thumbsup:" border="0" alt="thumbs_up.gif" />

Cake or death?
February 21, 2012
2:51 pm
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Erlend D Bertelsen
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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

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