Phylogeny and Taxonomic Revision of the Endemic Malagasy Genus Ptychochromis (Teleostei: Cichlidae), with the Description of Five New Species and a Diagnosis for Katria, New Genus

  title={Phylogeny and Taxonomic Revision of the Endemic Malagasy Genus Ptychochromis (Teleostei: Cichlidae), with the Description of Five New Species and a Diagnosis for Katria, New Genus},
  author={Melanie L.J. Stiassny and John S. Sparks},
Abstract The Malagasy cichlid genus Ptychochromis is revised and five new species are described, one of which is presumed to be extinct. The three valid nominal species, P. oligacanthus, P. grandidieri, and P. inornatus, are redescribed with diagnoses provided for each. A phylogeny of ptychochromin cichlids, derived from the simultaneous analysis of morphological features and nucleotide characters from a combination of mitochondrial and nuclear genes is presented. Ptychochromis is diagnosed by… 

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Phylogeny, taxonomy, and evolution of Neotropical cichlids (Teleostei: Cichlidae: Cichlinae)

The simultaneous analysis of 6309 characters for 90 terminals resulted in the first well‐supported and resolved generic‐level phylogeny for Neotropical cichlids, supporting a Gondwanan origin for Cichlidae.

Phylogenetic, morphological and systematic studies of three genera of Cichlidae (Teleosts fish, Perciformes) endemic of Madagascar

Malagasy continental waters are recognized for their richness in biodiversity.1 Up to 41% of Madagascar’s freshwater fish species (71 out of 172) are endemic, with two endemic families.2 Despite the

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Abstract Madagascar's biota is characterized by an extraordinary species richness, with a high degree of endemism. The island's freshwater habitats harbor numerous micro‐endemic species, restricted

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Annotated checklist of the fishes of Madagascar, southwestern Indian Ocean, with 158 new records

An annotated checklist of the fish species of the Madagascar EEZ (southwestern Indian Ocean) comprises a total of 1,798 species in 247 families, with the majority of the species is autochthonous; 28 species have been introduced, mainly in freshwater habitats.

Malagasy cichlids differentially limit impacts of body shape evolution on oral jaw functional morphology

This research shows that, unlike modularity, MTOM allows traits to retain strong evolutionary covariation while still reducing impacts on functionality, and suggests that MTOM, and its influence on the evolution of correlated traits, is likely much more widespread than is currently understood.

The relative sensitivity of different alignment methods and character codings in sensitivity analysis

The results favour the use of simultaneous alignment and progressive pairwise alignment using the similarity criterion over direct optimization followed by using the implied alignment(s) to calculate branch support when branch support is incorporated into the sensitivity criterion.



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Ptychochromis inornatus is endemic to the Ankofia drainage basin, with a geographic range extending from the Anjingo River northward to Lake Andrapongy and its surrounding drainages and red fin coloration in life.

Molecular phylogeny and biogeography of the Malagasy and South Asian cichlids (Teleostei: Perciformes: Cichlidae).

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    Molecular phylogenetics and evolution
  • 2004

Phylogeny and biogeography of cichlid fishes (Teleostei: Perciformes: Cichlidae)

Results indicate that Labroidei is not monophyletic, and that the sister group to Cichlidae may comprise a large and diverse assemblage of percomorph lineages.

An Introduction To the Taxonomy and Morphology of the Haplochromine Cichlidae From Lake Victoria

The importance of identification for both fishery-biology, ecology and other biological research has been the main reason for writing this paper which introduces the techniques applied in the taxonomy of the haplochromine Cichlidae from Lake Victoria.


  • K. Bremer
  • Biology
    Evolution; international journal of organic evolution
  • 1988
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Implied alignment: a synapomorphy‐based multiple‐sequence alignment method and its use in cladogram search

  • W. Wheeler
  • Biology
    Cladistics : the international journal of the Willi Hennig Society
  • 2003
A method to align sequence data based on parsimonious synapomorphy schemes generated by direct optimization (DO) and takes dynamic homologies and traces them back through a single cladogram, linking the unaligned sequence positions in the terminal taxa via DO transformation series.

The Parsimony Ratchet , a New Method for Rapid Parsimony Analysis

The Parsimony Ratchet is presented as a new method for analysis of large data sets. The method can be easily implemented with existing phylogenetic software by generating batch command files. Such an


A method to assess directly the number of DNA sequence transformations, evolutionary events, required by a phylogenetic topology without the use of multiple sequence alignment is described, which appears to generate more efficient (simpler) explanations of sequence variation than does multiple alignment.


The model presented here calculates a linear combination of variables that quantifies shape differences among populations, independent of size, and construe size and shape not as measured variables, but as general factors, linear combinations most parsimoniously accounting for the associations among the distance measures.

Homology and the Optimization of DNA Sequence Data

  • W. Wheeler
  • Biology
    Cladistics : the international journal of the Willi Hennig Society
  • 2001
The criterion of inter‐data set congruence, both character based and topological, are applied to two data sets to elucidate and potentially discriminate among these parsimony‐based ideas.