Re: Pertensis

[Mike & Diane Wise <apistowise@bewellnet.com>]

Tim Ellis wrote:

>  The fish were sent up by Mark Whittle. He collected them while guiding a tour of
> the ruins around there...on private property. The place was right next to the river
> ...

Can you find out precisely where these fish were collected on the upper Orinoco?
Collection data are very scarce & any info is valuable.

> At this point it is very difficult to ID them as they are still very small. The
> reason I asked about A. sp. orangesaum is that two of them look just like the
> pictures in the Tetra book.

I assume you mean the Mayland & Bork book published by Landbuch Verlag (German) or
Verlag A.C.S. (English).

> One looks like the male with the abdominal stripes and a black patch in the
> peduncle following a
> white band.

Many apistos show this feature. Is the caudal peduncle patch more of a band, like in
A. sp. Orangesaum, or more oval (American football) shaped like in A. sp.
Vierstreifen?

> Kinda like A. four stripes only different. The female is quite plump in the belly
> area and is displaying a side spot most of the time. Both have the exact same
> dorsal as shown in the Tetra book. First few dorsal rays are slightly fused and the
> rest are fused just below the tips, and both have a red line on top
> of the dorsal.

Actually they don't have "fused fins" at all. A fused fin has the lappets (fleshy
membrane) growing together without any saw toothed indentations in the fin. A.
borellii, A. pertensis and its relatives show this best in their sailfins.

Your fish may be young pertensis-group fish that haven't developed their sailfin yet
or, hopefully, are A. sp. Orangesaum/Minima/Weißsaum. Good luck with them and let us
know if you get them breeding

Mike Wise

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