Revisão taxonômica do gênero Coleodactylus Parker, 1926 (Squamata, Sphaerodactylidae)

Moretti, Renata

doi:10.11606/t.41.2009.tde-07052009-164221

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…At this stage, Sphaerodactylus macrolepis develops keeled scales in the dorsal part of the body and limbs, but they are not elongated and imbricate as in the adults of this species [ 76 ]. The condition of unkeeled granular scales is widespread in sphaerodactyls [ 31 , 32 , 39 ], thus the presence of elongated, keeled, imbricate scales is peramorphic, and it is present in several species of Sphaerodactylus and in the Chatogekko amazonicus complex [ 2 , 77 , 78 ].…”

Section: Resultsmentioning

confidence: 99%

The embryology of the retinal pigmented epithelium in dwarf geckos (Gekkota: Sphaerodactylinae): a unique developmental pattern

2014

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BackgroundThe retinal pigmented epithelium (RPE) is a rounded shaped structure in almost all lizards. In the New World dwarf geckos, this structure shows an unusual morphology. In addition to this ocular character, we describe notable differences in the development of these geckos in comparison with available developmental staging tables for other geckos and squamate reptiles.ResultsWe identified two main patterns of development of the RPE for squamates. These patterns were mapped onto a metatree of concordant hypotheses of squamates based on molecular data. During post-ovopositional stages the representative species of sphaerodactyls exhibit a RPE layer that transforms gradually from an ovoid form into the generalized spherical form. Sphaerodactyls are the only group of squamates in which this pattern is known.ConclusionsThis transition might be circumstantial evidence that the accessory RPE plays a role in providing additional protection for their apomorphic concaviclivate temporal fovea. We also report the presence of conjunctival papillae in a developmental stage prior to the formation of scleral ossicles. This developmental progression is similar to that of birds and turtles.

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Section: Resultsmentioning

confidence: 99%

The embryology of the retinal pigmented epithelium in dwarf geckos (Gekkota: Sphaerodactylinae): a unique developmental pattern

2014

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“…Coleodactylus and Chatogekko appear to be morphologically conservative and the identification of species‐level lineages in both genera using morphology has historically been difficult (Moretti, 2009). Our examination of Chatogekko osteology bears this out.…”

Section: Discussionmentioning

confidence: 99%

A new genus of miniaturized and pug-nosed gecko from South America (Sphaerodactylidae: Gekkota)

Gamble

Daza

Colli

et al. 2011

Zoological Journal of the Linnean Society

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Sphaerodactyl geckos comprise five genera distributed across Central and South America and the Caribbean. We estimated phylogenetic relationships among sphaerodactyl genera using both separate and combined analyses of seven nuclear genes. Relationships among genera were incongruent at different loci and phylogenies were characterized by short, in some cases zero length, internal branches and poor phylogenetic support at most nodes. We recovered a polyphyletic Coleodactylus, with Coleodactylus amazonicus being deeply divergent from the remaining Coleodactylus species sampled. The C. amazonicus lineage possessed unique codon deletions in the genes PTPN12 and RBMX while the remaining Coleodactylus species had unique codon deletions in RAG1. Topology tests could not reject a monophyletic Coleodactylus, but we show that short internal branch lengths decreased the accuracy of topology tests because there were not enough data along short branches to support one phylogenetic hypothesis over another. Morphological data corroborated results of the molecular phylogeny, with Coleodactylus exhibiting substantial morphological heterogeneity. We identified a suite of unique craniofacial features that differentiate C. amazonicus not only from other Coleodactylus species, but also from all other geckos. We describe this novel sphaerodactyl lineage as a new genus, Chatogekko gen. nov. We present a detailed osteology of Chatogekko, characterizing osteological correlates of miniaturization that provide a framework for future studies in sphaerodactyl systematics and biology.

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Toe pad morphology and adhesion in the miniaturized gecko, Chatogekko amazonicus (Gekkota: Sphaerodactylidae)

Griffing,

Daza,

Nielsen

et al. 2024

The Anatomical Record

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Chatogekko amazonicus is a miniaturized gecko from northern South America and is among the smallest of toe pad bearing lizards. The toe pads of C. amazonicus are miniscule, between 18% and 27% of the plantar surface area. We aimed to investigate the relationship between adhesive toe pad morphology, body size, and adhesive capabilities. Using scanning electron microscopy, we determine that the adhesive pads of C. amazonicus exhibit branched setae similar to those of other geckos, but that are generally much smaller. When compared with other gecko taxa, we show that C. amazonicus setae occupy a similar range of seta length: snout–vent length ratio and aspect ratio as other gekkonoid species (i.e. Gekkonidae, Phyllodactylidae, and Sphaerodactylidae). We demonstrate that C. amazonicus—even with its relatively small toe pads—is capable of climbing a smooth glass surface at a nearly vertical angle. We suggest that sphaerodactylids like C. amazonicus offer an excellent system for studying toe pad morphology and function in relation to miniaturization.

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Revisão taxonômica do gênero Coleodactylus Parker, 1926 (Squamata, Sphaerodactylidae)

Abstract: Agradeço meu orientador, Prof. Miguel Trefaut Rodrigues, pela oportunidade em integrar seu grupo de estudo e pelas críticas e sugestões ao meu trabalho; À CAPES, pela concessão da bolsa de estudos; Aos curadores de coleções herpetológicas por disponibilizarem o material de estudo

Cited by 3 publications

References 18 publications

The embryology of the retinal pigmented epithelium in dwarf geckos (Gekkota: Sphaerodactylinae): a unique developmental pattern

The embryology of the retinal pigmented epithelium in dwarf geckos (Gekkota: Sphaerodactylinae): a unique developmental pattern

A new genus of miniaturized and pug-nosed gecko from South America (Sphaerodactylidae: Gekkota)

Toe pad morphology and adhesion in the miniaturized gecko, Chatogekko amazonicus (Gekkota: Sphaerodactylidae)

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