A multigenic perspective on phylogenetic relationships in the largest family of salamanders, the Plethodontidae

Vieites, David R.; Román, Sandra Nieto; Wake, Marvalee H.; Wake, David B.

doi:10.1016/j.ympev.2011.03.012

Cited by 74 publications

(72 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The family Plethodontidae is divided basally into two subfamilies: the Hemidactyliinae, which includes the genera Eurycea and Bolitoglossa among others, and the Plethodontinae, which includes Hydromantes, Ensatina and Plethodon, among others. Plethodon is basal within Plethodontinae whereas Ensatina is deeply nested (Vieites et al, 2011). Based on this phylogenetic arrangement and the results of this study in which we document that Plethodon has a non-elastic mechanism whilst that of Ensatina is both ballistic and elastic, we can be reasonably certain that Ensatina has evolved elastic, ballistic projection independently from Eurycea and Bolitoglossa.…”

Section: Introductionsupporting

confidence: 51%

“…Within the plethodontid clade Plethodontinae, Plethodon is basal and has musclepowered tongue protraction, while Ensatina and Hydromantes, with their ballistic tongue projection, are more deeply nested (Vieites et al, 2011). Eurycea and Bolitoglossa both use ballistic, elastic tongue projection and are members of the sister clade Hemidactyliinae (Vieites et al, 2011).…”

Section: Tongue Projection Mechanisms Comparedmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics and thermal sensitivity of ballistic and non-ballistic feeding in salamanders

Deban

Scales

2015

Journal of Experimental Biology

View full text Add to dashboard Cite

Low temperature reduces the performance of muscle-powered movements, but in movements powered by elastic recoil mechanisms, this effect can be mitigated and performance can be increased. To better understand the morphological basis of high performance and thermal robustness of elastically powered movements, we compared feeding dynamics at a range of temperatures (5-25°C) in two species of terrestrial plethodontid salamanders, Plethodon metcalfi and Ensatina eschscholtzii, which differ in tongue muscle architecture and the mechanism of tongue projection. We found that Ensatina is capable of ballistic projection with a mean muscle mass-specific power of 2100 W kg, revealing an elastic mechanism. Plethodon, in contrast, projected its tongue non-ballistically with a mean power of only 18 W kg, indicating it is muscle powered. Ensatina projected its tongue significantly farther than Plethodon and with dynamics that had significantly lower thermal sensitivity at temperatures below 15°C. These performance differences were correlated with morphological differences, namely elongated collagenous aponeuroses in the projector muscle of Ensatina as compared with Plethodon, which are likely the site of energy storage, and the absence in Ensatina of projector muscle fibers attaching to the tongue skeleton that allows projection to be truly ballistic. These findings demonstrate that, in these otherwise similar species, the presence in one species of elaborated connective tissue in series with myofibers confers not only 10-fold greater absolute performance but also greater thermal robustness of performance. We conclude that changes in muscle and connective tissue architecture are sufficient to alter significantly the mechanics, performance and thermal robustness of musculoskeletal systems.

show abstract

Section: Introductionsupporting

confidence: 51%

Section: Tongue Projection Mechanisms Comparedmentioning

confidence: 99%

Dynamics and thermal sensitivity of ballistic and non-ballistic feeding in salamanders

Deban

Scales

2015

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…The ballistic tongue-projection mechanism of E. guttolineata is independently evolved from that of chameleons, anurans and another plethodontid (Hydromantes) (Deban et al, 2007;Vieites et al, 2011) that has been shown to exhibit high-power tongue projection that is thermally robust (Deban and Richardson, 2011). The tongue morphology of E. guttolineata is, however, less extremely specialized for long-distance projection than that of Hydromantes; thus, the tongue-projection system of Eurycea provides a good opportunity to explore the generality of patterns of thermal robustness in elastically powered tongue projection and its underlying motor and muscle physiology.…”

Section: Introductionmentioning

confidence: 99%

Thermal effects on the performance, motor control, and muscle dynamics of ballistic feeding in the salamanderEurycea guttolineata

Anderson

Larghi

Deban

2014

Journal of Experimental Biology

View full text Add to dashboard Cite

Temperature strongly affects muscle contractile rate properties and thus may influence whole-organism performance. Movements powered by elastic recoil, however, are known to be more thermally robust than muscle-powered movements. We examined the wholeorganism performance, motor control and muscle contractile physiology underlying feeding in the salamander Eurycea guttolineata. We compared elastically powered tongue projection with the associated muscle-powered retraction to determine the thermal robustness of each of these functional levels. We found that tongueprojection distance in E. guttolineata was unaffected by temperature across the entire 4-26°C range, tongue-projection dynamics were significantly affected by temperature across only the 4-11°C interval, and tongue retraction was affected to a higher degree across the entire temperature range. The significant effect of temperature on projection dynamics across the 4-11°C interval corresponds to a significant decline in projector muscle burst intensity and peak contractile force of the projector muscle across the same interval. Across the remaining temperature range, however, projection dynamics were unaffected by temperature, with muscle contractile physiology showing typical thermal effects and motor patterns showing increased activity durations and latencies. These results reveal that elastically powered tongue-projection performance in E. guttolineata is maintained to a higher degree than muscle-powered tongue retraction performance across a wide temperature range. These results further indicate that thermal robustness of the elastically powered movement is dependent on motor control and muscle physiology that results in comparable energy being stored in elastic tissues across a range of temperatures.

show abstract

“…By combining data from three nuclear genes and complete mitochondrial genomes, Vieites et al (2011) found a well-supported hemidactyline-plethodontine dichotomy with the Hemidactyliinae as a fully supported, fully resolved clade. Surprisingly to me, the Plethodontinae lost resolution relative to Vieites et al (2007).…”

Section: How Robust Is Our Current Phylogenetic Inference Formentioning

confidence: 98%

“…A statistically unsupported topology found Karsenia sister to Hydromantes. Pyron and Wiens (2011) performed the most species-rich analysis using available molecular data (they lacked new molecular data from Vieites et al 2011). They found the now-expected plethodontine-hemidactyline split, with Hemidactylium sister to all other hemidactylines and Plethodon sister to all other plethodontines.…”

Section: How Robust Is Our Current Phylogenetic Inference Formentioning

confidence: 99%

Persistent Plethodontid Themes: Species, Phylogenies, and Biogeography

Wake

2017

Herpetologica

Self Cite

View full text Add to dashboard Cite

A multigenic perspective on phylogenetic relationships in the largest family of salamanders, the Plethodontidae

Cited by 74 publications

References 61 publications

Dynamics and thermal sensitivity of ballistic and non-ballistic feeding in salamanders

Dynamics and thermal sensitivity of ballistic and non-ballistic feeding in salamanders

Thermal effects on the performance, motor control, and muscle dynamics of ballistic feeding in the salamanderEurycea guttolineata

Persistent Plethodontid Themes: Species, Phylogenies, and Biogeography

Contact Info

Product

Resources

About