Neolamprologus tetracanthus

From the Rift Lakes, cichlids of Lake Tanganyika

Neolamprologus tetracanthus

Postby damba » Fri Jul 06, 2012 8:14 am

To me one of the real stunners from the lake. I have a stunning pair though the boy can be a bit nasty on his girl. I am still waiting for a succesful spawn. As an aside I dont think I happy with this species being in Neolamprologus it is certainly the giant but its teeth differ from species like the bric and they behave very differrntly. Very secretive and an obvious pisivore. But where else would it go? Opinions would be welcome..
ImageImage
Image

Female top and bottom. They grow at an amazing rate

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Re: Neolamprologus tetracanthus

Postby fred.manby » Fri Jul 06, 2012 9:45 am

Wonderful species Tom, thanks for sharing the pics. I can't help on the taxonomy, but now you mention it, it seems very Lepidiolamprologus-like. In fact in Day et al. Molecular Phylogenetics and Evolution 45 (2007) 629–642 there is a phylogenetic tree which places N. tetracanthus right next to L. cunningtoni (although both a considerable distance from other Lep. species). I should say I don't know what any of this means, and am definitely no expert.
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Re: Neolamprologus tetracanthus

Postby James (24T) » Sat Jul 07, 2012 12:44 am

Not one of my favs but nice examples.
Erm think you will find they are not exceptional Neolamps. Similar to the none specialised Neolamprologus cunningtoni if you check em out on the evolutionary/DNA trees.
http://www.ncbi.nlm.nih.gov/pubmed/20601006

But then the trees do throw up some oddities. Like why on earth do Variabilichromis moori get a separate genus? etc. ;)

I tend to think of em as one of the least changed (specialised) Lamps in the lake being so similar to riverine species like L.congoensis.

As the type species for Neolamprologus its prob not going anywhere. If there are moves to be made its others that should be moved to new genera. Though I guess thats not written in stone.

Neolamprologus Colombe & Allgayer, 1985

Neolamprologus tetracanthus (Boulenger, 1899) original description Lamprologus I think. ;)

Type species for Lamprologus.... Lamprologus congoensis Schilthuis, 1890

All the best James
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Re: Neolamprologus tetracanthus

Postby damba » Sat Jul 07, 2012 7:24 am

Thanks James tbh i hadnt looked much on line. Do you not think that moori being an aufwuchs eater is sufficiently diffetent? I think neolamprologus is a bit messy right now.

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Re: Neolamprologus tetracanthus

Postby Simon Morgan » Sat Jul 07, 2012 7:36 am

A rose by any other name...
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Re: Neolamprologus tetracanthus

Postby James (24T) » Sat Jul 07, 2012 11:05 am

damba wrote:Do you not think that moori being an aufwuchs eater is sufficiently diffetent? I think neolamprologus is a bit messy right now.


:oops: I did not know that (They showed no sine of this when I kept em (seemed to love the usual Lamp fare of fish foods the fishyer/shrimpyer the better) :oops: ). Yep I guess thats why.

To be honest few African cichlid genera are not messy (polyphyletic) esp the older ones (or in this case a renamed old one (those chucked out of Lamprologus that have the ossified ligament thingy).

It has been known for some time that according to mtDNA sequence analysis, this genus is prob polyphyletic. It is likely that it will be revised eventually; as Variabilichromis has been split off, at least some of the more ancient lineages currently placed in Neolamprologus are prob worthy of separation also.

Mind you not everyone even follows the Neolamp/"exLamp" split (still saying the genera of the tribe Lamprologini, are just Altolamprologus, Chalinochromis, Julidochromis, Lamprologus, Lepidiolamprologus, Neolamprologus, Telmatochromis and Variabilichromis) and the "exLamprologus" (Konings, 1998) do not even have a good name nor a type species. :(

Thing is while genera are clearly different in their morphology, habits and ecology, (and could be further separated) gene flow between genera and is common enough due to extremely low postzygotic isolation. Males of Neolamprologus apparently have always readily and successfully mated with females of other Lamprologini they found ready to spawn. And not only do such hybrids seem to be fertile, new species appear to originate from such interbreeding.

All the best James
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