Total Evidence, Sequence Alignment, Evolution of Polychrotid Lizards, and a Reclassification of the Iguania (Squamata: Iguania)

Frost, Darrel R.; Etheridge, R.; Janies, Daniel; Titus, Tom A.

doi:10.1206/0003-0082(2001)343<0001:tesaeo>2.0.co;2

Cited by 149 publications

(145 citation statements)

References 31 publications

Supporting

Mentioning

112

Contrasting

Unclassified

Order By: Relevance

“…The few studies that include a large number of locations hinder a better understanding of the association between reproductive activity and environmental factors on the lizards of the genus Tropidurus (Wiederhecker et al, 2002). However, important information about the reproductive activity of Neotropical lizards has arisen from studies of members from the family Tropiduridae (sensu Frost et al, 2001). In general, tropidurid lizards present their reproductive cycle in seasonal habitats; and studies on the ecology and reproductive cycles of some species of the genus Tropidurus has currently been studied, including T. etheridgei (Cruz, 1997), T. spinulosus (Cruz et al, 1997), T. semitaeniatus (Vitt & Goldberg;Ribeiro et al, 2010); T. montanus (Van Sluys et al); T. hispidus (Vitt & Goldberg;Vitt et al, 1996), T. oreadicus (Rocha & Bergallo, 1990), T. itambere (Van Sluys;Ferreira et al, 2009) and T. torquatus (Bergallo & Rocha, 1993Giaretta, 1996;Vieira et al;Wiederhecker et al) (see Table III).…”

Section: Resultsmentioning

confidence: 99%

Reproductive Strategies of Brazilian Lizards of the Genus Tropidurus Rodrigues, 1987 (Squamata, Tropiduridae) in the Temporal and Spatial

2011

View full text Add to dashboard Cite

Estrategias Reproductivas de las Lagartijas Brasileñas del Género SUMMARY:Reproductive strategy is the set of adaptations that promote the most efficient way that the species will survive under the particular conditions of a determined environment. Understanding these adaptations is important and can help pinpoint populations indicator of environmental changes. Spermatogenesis is a measurable biological process of these adaptations in spatial and temporal scales. We analyzed the morphology of the testes and oviducts of the lizard species that comprise the genus Tropidurus, taking into account the geographical distribution and sympatric relations. For the analysis and the testes were removed from the middle part of the oviducts from Tropidurus etheridge, T. oreadicus, T. itambere, T. spinulosus and T. Guarani species, collected in different places in the Mato Grosso state, Brazil. The reproductive period is synchronous for males and females and occurs in September, October and November. Reproductive males were characterized. In the testes are seminiferous tubules with germ cells at different stages of spermatogenesis, with a high epithelium, at present light, free spermatozoa in the lumen and reduction of interstitial tissue. For females, the reproduction peak occurs when the oviduct epithelium is high with secretions and basal nucleus. These months are characterized in the sampled areas over a period of heavy rain and high temperatures. The decline of reproductive period was observed in both sexes, between April and August. Low reproduction in males is characterized by ample light, absence of sperm, only germ cells in the early stages of spermatogenesis are observed (a few spermatogonia and spermatocytes) and interstitial tissue wide. In females, the period of reproductive decline is marked by the absence of unicellular glands in the oviduct epithelium, with higher affinity with the dye. This period corresponds to low rainfall periods and lower temperatures. We propose an analysis of zoological samples; this is a proposal to facilitate the work of many researchers through access to the species, especially rare species.

show abstract

Section: Resultsmentioning

confidence: 99%

Reproductive Strategies of Brazilian Lizards of the Genus Tropidurus Rodrigues, 1987 (Squamata, Tropiduridae) in the Temporal and Spatial

2011

View full text Add to dashboard Cite

show abstract

“…They considered Enyalius as monophyletic, having E. bilineatus as the basal species and (iheringii (perditus ((boulengeri, leechii, brasiliensis) catenatus, and (pictus and bibronii)))) sequentially derived. Alternative relationships between perditus and boulengerileechii-brasiliensis and between leechii and brasiliensis were also supported (Frost et al, 2001). Actually, it was the nested position of leechii with the forms of brasiliensis that lead them to adopt the full species status for the subspecies recognized by Jackson (1978).…”

Section: Discussionmentioning

confidence: 82%

“…One of Jackson's alternative hypotheses was based on color pattern and assembled all species with green males referred to above. Frost et al (2001), the first analysis in the modern phylogenetic sense, was based on morphological and molecular data but genetic sampling was restricted to E. bilineatus and E. leechii. They considered Enyalius as monophyletic, having E. bilineatus as the basal species and (iheringii (perditus ((boulengeri, leechii, brasiliensis) catenatus, and (pictus and bibronii)))) sequentially derived.…”

Section: Discussionmentioning

confidence: 99%

“…Since then Jackson's (1978) scheme has been almost uncritically adopted. The exceptions refer to one of the catenatus subspecies (bibroni) that has been considered without comment as a full species (Rodrigues 1991, Freire 1996, BorgesNojosa and Caramaschi 2004, SBH 2005, or to all other subspecies that Frost et al (2001), adopting a conservative view, considered full species as well. Nevertheless, although admittedly variable, none of the new material of Enyalius subsequently obtained was considered sufficiently distinct to recognize new species.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new species of lizard genus Enyalius (Squamata, Leiosauridae) from the highlands of Chapada Diamantina, state of Bahia, Brazil, with a key to species

Rodrigues¹,

Freitas²,

Silva³

et al. 2006

Phyllomedusa

View full text Add to dashboard Cite

A new species of lizard genus Enyalius (Squamata, Leiosauridae) from the highlands of Chapada Diamantina, state of Bahia, Brazil, with a key to species. A new species of lizard genus Enyalius is described from Fazenda Caraibas, municipality of Mucugê, state of Bahia, northeastern Brazil, in the northern portion of the Serra do Espinhaço. It is characterized by an almost straight canthal ridge, a distinctive enlarged subocular, ventral scales and infradigital lamellae smooth, tail length varying between 2.02-2.18 times snout-vent length, 54-63 vertebral scales between occiput and base of tail, 144-167 paravertebral scales between occiput and base of tail, 44-47 transverse rows of ventrals between posterior level of forelimbs and anterior level of hindlimbs, 52-66 scales at mid-body between middle of venter and crest, 17-18 and 25-28 infradigital lamellae, respectively under Finger IV and Toe IV, 23-27 scales along dorsal surface of tibia, and 33-40 gular scales between mental and collar. The new species is sexually dichromatic with males being brightly colored with a series of six very conspicuous transverse wide black dorsal bands on body separated by deep orange light areas and females dull colored with a pattern of irregular dark or light brown longitudinal stripes. The new species was obtained at Serra do Sincorá, state of Bahia, Brazil, in low, thin, and dense semidecidual forests situated around 1000m altitude, near the headwaters of the Rio Paraguaçu. Character distribution in Enyalius is discussed, the presently recognized subspecies of Enyalius catenatus are elevated to full species status and a key to the current species of Enyalius is presented.

show abstract

“…Debido a esta característica estos autores diferencian a M. thoracicus de la mayoría de especies del género Microlophus, sin embargo no existen estudios que contribuyan con mayor información sobre la dieta de esta especie y la posible variación ontogenética en el consumo de material vegetal mencionado por Dixon y Wright (1975). [Frost, 1992]) thoracicus es conocida con el nombre común de "lagartija de los gramadales" (Icochea 1998), y se reconocen tres subespecies (Dixon & Wright 1975, Carrillo e Icochea 1995, donde M. thoracicus icae presenta una distribución sureña entre los departamentos de Arequipa e Ica (Dixon & Wright 1975), incluyendo el valle de Ica. Los objetivos de esta investigación fueron: i) caracterizar cuantitativamente la dieta de M. thoracicus icae, ii) cuantificar el consumo de material vegetal por parte de M. thoracicus icae, iii) identificar la potencial variación ontogenética del consumo del material vegetal entre juveniles y adultos.…”

Section: Introductionunclassified

Dieta de la lagartija de los gramadales Microlophus thoracicus icae en el valle del río Ica, Perú

Pérez

Fuentes²,

Jordán³

2015

Rev peru biol

View full text Add to dashboard Cite

Dieta de la lagartija de los gramadales Microlophus thoracicus icaeRev. peru. biol. 22 (2) ResumenSe evaluó la dieta de la lagartija de los gramadales Microlophus thoracicus icae en tres localidades del Valle del río Ica, Perú. La dieta de este saurio se caracterizó por un importante consumo de material vegetal, principalmente foliolos del árbol Prosopis spp., e invertebrados, especialmente insectos como hormigas y larvas de insectos. No se registraron relaciones significativas entre el tamaño corporal de los individuos y el número total de presas consumidos, ni el volumen total consumido. Los juveniles, hembras y machos de M. t. icae no presentaron diferencias significativas en el número de hormigas o larvas de insectos consumidos. Tampoco se registraron diferencias significativas en la proporción de material vegetal consumido por juveniles, hembras y machos. Sin embargo, el volumen de material vegetal consumido fue mayor para machos y hembras, comparado con juveniles. No se observan diferencias evidentes entre las dietas de juveniles, hembras y machos en el análisis multivariado. La amplitud del nicho trófico para M. t. icae fue de B ij = 6.97. El consumo de material vegetal e invertebrados es importante para juveniles y adultos de M. t. icae, por lo tanto, no se observa una marcada variación etaria en la dieta de los individuos evaluados. Esta especie de saurio presentaría una gran plasticidad en su dieta (omnívora) influenciada principalmente por la variación local de la oferta de los recursos alimenticios. Las posibles consecuencias del consumo de una dieta tan variada podrían incluir características particulares en sus endoparásitos, estrategias y eficiencia de forrajeo, termorregulación, morfología, entre otros.Palabras Clave: Dieta; Saurio; Desierto Costero Peruano; omnivoría; Lagartija de gramadales. AbstractThe diet of grass lizard, Microlophus thoracicus icae, was evaluated in three localities of the Ica River Valley, Peru. The dietary pattern was characterized by high consumption of vegetable material, mainly Prosopis spp. leaves, and invertebrates as ants and insect larvae. No significant relationships were found between body size, number of prey eaten or volume consumed. The juvenile, male and female M. t. icae not showed significant differences regarding number of ants or insect larvae consumed, neither on the proportion consumed of plant material. However, total volume of plant material was different between males and females, compared to juveniles. Multivariate analysis showed no evident difference in the diets of juveniles, males and females. Trophic niche amplitude for M. t. icae was B ij = 6.97. The consumption of plant material and invertebrates is important for both juvenile and adult iguanas, therefore; no clear age difference in diet was observed in the individuals studied. This species would present great diet plasticity (omnivory) influenced by the local variation of food resources. Possible consequences of a varied diet may include particular characteristics of its parasites, foraging...

show abstract

Total Evidence, Sequence Alignment, Evolution of Polychrotid Lizards, and a Reclassification of the Iguania (Squamata: Iguania)

Cited by 149 publications

References 31 publications

Reproductive Strategies of Brazilian Lizards of the Genus Tropidurus Rodrigues, 1987 (Squamata, Tropiduridae) in the Temporal and Spatial

Reproductive Strategies of Brazilian Lizards of the Genus Tropidurus Rodrigues, 1987 (Squamata, Tropiduridae) in the Temporal and Spatial

A new species of lizard genus Enyalius (Squamata, Leiosauridae) from the highlands of Chapada Diamantina, state of Bahia, Brazil, with a key to species

Dieta de la lagartija de los gramadales Microlophus thoracicus icae en el valle del río Ica, Perú

Contact Info

Product

Resources

About