Lectotype designation and redescription of the Gymnophthalmid lizard Riama columbiana (Andersson, 1914) with notes on the type Locality

Sánchez-Pacheco, Santiago J.

doi:10.1590/s0031-10492010000200001

Pap. Avulsos Zool. (São Paulo)

2010

DOI: 10.1590/s0031-10492010000200001

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Lectotype designation and redescription of the Gymnophthalmid lizard Riama columbiana (Andersson, 1914) with notes on the type Locality

Santiago J. Sánchez-Pacheco¹

Abstract: The poorly known Riama columbiana, Andean gymnophthalmid lizard from Colombia, is redescribed on the basis of syntypes and additional material. A lectotype is designated, its likely provenience is discussed, and its distribution and natural history are given.

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Cited by 4 publications

References 11 publications

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Phylogeny of Riama (Squamata: Gymnophthalmidae), impact of phenotypic evidence on molecular datasets, and the origin of the Sierra Nevada de Santa Marta endemic fauna

et al. 2017

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Riama is the most speciose genus of the Neotropical lizard family Gymnophthalmidae. Its more than 30 montane species occur throughout the northern Andes, the Cordillera de la Costa (CC) in Venezuela, and Trinidad. We present the most comprehensive phylogenetic analysis of Riama to date based on a total evidence (TE) approach and direct optimization of molecular and morphological evidence. Analyses use DNA sequences from four loci and 35 phenotypic characters. The dataset consists of 55 ingroup terminals representing 25 of the 30 currently recognized species of Riama plus five undescribed taxa, including an endemic species from the Sierra Nevada de Santa Marta (SNSM) in Colombia, and 66 outgroup terminals of 47 species. Analysis results in a well-supported hypothesis in which Riama is polyphyletic, with its species falling into three clades. The Tepuian Anadia mcdiarmidi nests within one clade of Riama, and the recently resurrected Pantodactylus nests within Cercosaura. Accordingly, we propose a monophyletic taxonomy that reflects historical relationships. Analysis of character evolution indicates that the presence/absence of prefrontals-a cornerstone of the early genus-level taxonomy of cercosaurines-is optimally explained as having been plesiomorphically present in the most recent common ancestor of Cercosaurinae and lost in that of the immediately less inclusive clade. Multiple independent reversals to present and subsequent returns to absent occur within this clade. To evaluate the impact of phenotypic evidence on our results, we compare our TE results with results obtained from analyses using only molecular data. Although phenotypic evidence comprises only 1.2% of the TE matrix, its inclusion alters both the topology and support values of the clades that do not differ. Finally, current phylogenetic evidence reveals a SNSM-CC-Trinidad-tepuis biogeographical link. We hypothesize that an ancient connection facilitated the exchange of species between the SNSM and the CC.

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Phylogeny of Riama (Squamata: Gymnophthalmidae), impact of phenotypic evidence on molecular datasets, and the origin of the Sierra Nevada de Santa Marta endemic fauna

et al. 2017

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A new species of Riama Gray, 1858 (Squamata: Gymnophthalmidae) <br />from the Tropical Andes

Aguirre-Peñafiel¹,

Torres‐Carvajal²,

Nunes³

et al. 2014

Zootaxa

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A new species of Riama lizard from the western slopes of the Andes in northern Ecuador is described herein. Morphologically, Riama yumborum sp. nov. can be distinguished from all other congenerics by having an incomplete nasoloreal suture and a cylindrical hemipenial body with diagonally orientated flounces on its lateral aspect. Phylogenetic analyses of mitochondrial and nuclear DNA support the monophyly of the new species and its sister taxon relationship with R. labionis, which occurs allopatrically.

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A New “Microteiid” Lizard (Squamata: Gymnophthalmidae: Riama) from Southwestern Colombia

Sánchez-Pacheco¹

2010

Herpetologica

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Lectotype designation and redescription of the Gymnophthalmid lizard Riama columbiana (Andersson, 1914) with notes on the type Locality

Abstract: The poorly known Riama columbiana, Andean gymnophthalmid lizard from Colombia, is redescribed on the basis of syntypes and additional material. A lectotype is designated, its likely provenience is discussed, and its distribution and natural history are given.

Cited by 4 publications

References 11 publications

Phylogeny of Riama (Squamata: Gymnophthalmidae), impact of phenotypic evidence on molecular datasets, and the origin of the Sierra Nevada de Santa Marta endemic fauna

Phylogeny of Riama (Squamata: Gymnophthalmidae), impact of phenotypic evidence on molecular datasets, and the origin of the Sierra Nevada de Santa Marta endemic fauna

A new species of Riama Gray, 1858 (Squamata: Gymnophthalmidae) <br />from the Tropical Andes

A New “Microteiid” Lizard (Squamata: Gymnophthalmidae: Riama) from Southwestern Colombia

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