Wednesday, November 7, 2018

[Herpetology • 2018] Polymorphism and Synonymy of Brookesia antakarana and B. ambreensis, Leaf Chameleons from Montagne d’Ambre in north Madagascar


Brookesia antakarana Raxworthy & Nussbaum, 1995

in Scherz, Glaw, Rakotoarison, et al, 2018. 
  SALAMANDRA. 54(4)

Abstract
 We examine the taxonomic status of two Malagasy leaf chameleon taxa, Brookesia antakarana Raxworthy & Nussbaum, 1995 and B. ambreensis Raxworthy & Nussbaum, 1995, integrating morphological and genetic evidence. Specimens assigned to these species occur in syntopy in Montagne d’Ambre, northern Madagascar, and were originally described based on differences in the shape of their pelvic shields. We found that the shape of these shields falls on a continuous spectrum, and detected only weak differences between the two taxa in a few other morphological features, all of which were correlated with shield length. Members of the two taxa (as assigned based on pelvic shield morphology) also showed extensive haplotype sharing in one nuclear and one mitochondrial marker. We conclude that at present there is no convincing evidence that these species are distinct, and act as first revisers in the sense of the International Code of Zoological Nomenclature to place B. ambreensis into the synonymy of B. antakarana.

 Key words: Squamata, Chamaeleonidae, morphology, molecular genetics, taxonomy, Amber Mountain, Antsiranana.



Figure 4. Specimens of Brookesia antakarana/ambreensis photographed in Montagne d’Ambre between 1994 and 2012.
(A) Probably ZSM 2091/2007 (FGZC 1073); (B) unidentified individual photographed in 2007; (C) unidentified individual photographed in 2003; (D) probably ZSM 2030/2003 (FGMV 2002-3086); (E–F) uncollected individuals photographed in 1994; (G–H) unidentified individual photographed in 2012.

Mark D. Scherz, Frank Glaw, Andolalao Rakotoarison, Melina Wagler and Miguel Vences. 2018. Polymorphism and Synonymy of Brookesia antakarana and B. ambreensis, Leaf Chameleons from Montagne d’Ambre in north Madagascar. SALAMANDRA. 54(4); 259-268. 


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