Melanochromis / Pseudotropheus

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Lisachromis
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Melanochromis / Pseudotropheus

Post by Lisachromis » Thu Nov 10, 2011 8:30 am

I was writing a post to answer someone as to what species were left in Pseudotropheus.
viewtopic.php?f=6&t=13427&p=66249#p66216

I realized a lot of species we call Melanochromis are in this list (e.g. johannii, cyaneorhabdos). When did these species get moved to Pseudotropheus and why?

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Re: Melanochromis / Pseudotropheus

Post by Rico Morgenstern » Thu Nov 10, 2011 10:11 am

Perhaps the following work is useful:

http://www.mapress.com/zootaxa/2009/f/zt02076p059.pdf

It contains a table listing all former Melanochromis, each with one or more references for their re-classification. Nevertheless, the generic classification of the Mbuna is far from being resolved, and further changes can be expected in the future.

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Re: Melanochromis / Pseudotropheus

Post by Juan Artigas » Thu Nov 10, 2011 10:27 am

This particular paragraph in page 57 on Rico's suggested document may point to the question:

" The initial distinction between Melanochromis and Pseudotropheus relating to the size and configuration of the pharyngeal teeth (Trewavas 1935) is no longer considered a diagnostic feature—in fact, no distinction could be found between the pharyngeal jaws of the type species of either genus (Trewavas 1984). Another characteristic, relating to the arrangement of the oral teeth in U-shaped bands and extended on each side by a single row of unicuspid teeth (Trewavas 1984), is shared with many members of Pseudotropheus and has thus no diagnostic value. It was stated as a characteristic of Melanochromis by Trewavas (1984) but never specifically considered as a diagnostic feature. We regard the basic melanin pattern one of the important characteristics in classifying Malaŵi cichlids, and species of Melanochromis have a unique pattern that is—incomplete in some—reversed in adult males. Since the inception of the genus many workers have suggested alternative classifications for its members (Table 5), and over time the diagnosis has been enhanced and refined, but, currently, we still regard both Melanochromis and Pseudotropheus as polyphyletic. "
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Re: Melanochromis / Pseudotropheus

Post by Philippe Burnel » Fri Nov 11, 2011 2:05 am

Tawil Patrick; 2002; "Notes sur le genre Melanochromis et l'appartenance générique de Pseudotropheus johannii Eccles, 1973, et espèces apparentées"; L'an Cichlidé; v. 2; pp. 61-68 (crc01583).

In which Patrick explains why the johanni group can't be member of the true Malnochromis because of the reverse color pattern.
So the best name is, for the time beeing, "Pseudotropheus", first name used for a species of this group. Probably a new genus name is necessary.
Philippe

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Re: Melanochromis / Pseudotropheus

Post by Lisachromis » Mon Nov 14, 2011 8:21 am

OK, that makes more sense. I knew there was problems with Melanochromis. I'm glad to know why things got changed.

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Re: Melanochromis / Pseudotropheus

Post by SergeS » Fri Nov 25, 2011 3:50 am

I'm lost... not too long ago, Bowers & Stauffer described 8 species of Melanochromis (1997) and now they've been moved to Pseudotropheus again? Or is, for example, M. cyaneorhabdos still a valid name?

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Re: Melanochromis / Pseudotropheus

Post by Philippe Burnel » Fri Nov 25, 2011 6:47 am

The johnni group (including cyaenorhabdos) has not its place among Melanochromis.
I don't remember wich species were described in 1997 but some of them can certainly stay among Melanochromis


edit : cyaenorhabdos and perileucos among "Pseudotropheus"
Other ones are Melanochromis.

You can have a look to the cichlid catalog

Philippe

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Re: Melanochromis / Pseudotropheus

Post by SergeS » Mon Nov 28, 2011 9:04 am

Thanks Philippe. I don't think mankind will ever be able to come up with a proper classification for (Malawi) cichlids :lol:

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Re: Melanochromis / Pseudotropheus

Post by Lisachromis » Fri Dec 05, 2014 4:24 pm

Species in Melachromis and (according to that paper) classified now as (If I understand the table correctly):

Melanochromis melanopterus = Melanochromis melanopterus

Melanochromis vermivorus = Melanochromis vermivorus

Melanochromis brevis = Melanochromis brevis

Melanochromis perspicax = Pseudotropheus perspicax

Melanochromis labrosus = Melanochromis labrosus

Pseudotropheus auratus = Melanochromis auratus

Pseudotropheus johannii = Pseudotropheus johannii

Melanochromis simulans = Melanochromis simulans

Melanochromis exasperatus = Pseudotropheus joanjohnsonae

Labidochromis joanjohnsonae = Melanochromis joanjohnsonae

Melanochromis parallelus = Melanochromis parallelus

Melanochromis chipokae = Melanochromis chipokae

Melanochromis loriae = Melanochromis loriae

Melanochromis interruptus = Pseudotropheus interruptus

Melanochromis mellitus = Melanochromis vermivorus by Schraml 1998 and Konings 2001, Melanochromis melanopterus, this paper

Melanochromis robustus = Melanochromis robustus

Melanochromis crabro = Pseudotropheus crabro

Melanochromis heterochromis = Melanochromis heterochromis

Melanochromis dialeptos = Melanochromis dialeptos

Melanochromis cyaneorhabdos = Pseudotropheus cyaneorhabdos

Melanochromis perileucos = Pseudotropheus perileucos

Melanochromis baliodigma = Melanochromis baliodigma

Melanochromis xanthodigma = Melanochromis baliodigma

Melanochromis lepidiadaptes = Melanochromis lepidiadaptes

Melanochromis elastodema = Melanochromis interruptus

Melanochromis benetos = Melanochromis robustus by Konings 2001, Pseudotropheus benetos, this paper

Melanochromis kaskazini = Melanochromis kaskazini

Melanochromis wochepa = Melanochromis wochepa

Melanochromis mossambiquensis = Melanochromis mossambiquensis

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Re: Melanochromis / Pseudotropheus

Post by DRE » Fri Dec 05, 2014 4:44 pm

Is left or right side the current correct naming?
Discovery consists of looking at the same thing as everyone else and thinking something different

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Re: Melanochromis / Pseudotropheus

Post by Florent » Fri Dec 05, 2014 5:02 pm

Rigth, but you must read Abactochromis for labrosus


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Re: Melanochromis / Pseudotropheus

Post by Philippe Burnel » Fri Dec 05, 2014 11:58 pm

I think joanjohnsonae is a true labidochromis. And Interruptus is a member of the Johanni group so it´s a " pseudotropheus"

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Re: Melanochromis / Pseudotropheus

Post by Rico Morgenstern » Sat Dec 06, 2014 1:48 am

A more recent overview, with an updated list of species and an identification key is found here:

http://www.mapress.com/zootaxa/2012/f/zt03258p027.pdf

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