A new species of Telmatobius (Amphibia, Anura, Telmatobiidae) from the Pacific slopes of the Andes, Peru

Catenazzi, Alessandro; García, Víctor Vargas; Lehr, Edgar

doi:10.3897/zookeys.480.8578

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…Hind‐limb relative length varies considerably in Telmatobius (Trueb, 1979; Vellard, 1951). Therefore, this character has been widely used in taxonomic studies (Barbour & Noble, 1920; Boulenger, 1882; Catenazzi, García, & Lehr, 2015; Cei, 1977; Cuevas & Formas, 2002; Fibla et al, 2017; Formas et al, 1999; Formas, Benavides, & Cuevas, 2003; Formas, Cuevas, & Nuñez, 2006; Noble, 1938; Parker, 1940; Trueb, 1979; Veloso & Trueb, 1976). In some cases, differences in the relative lengths of the hind limbs have been correlated with ecological factors.…”

Section: Introductionmentioning

confidence: 99%

Variation in the growth and development of the hind limbs in frogs of the genus Telmatobius (Anura: Telmatobiidae)

Barrionuevo

2020

Journal of Morphology

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There are remarkable interspecific differences in the sizes of the larvae of Andean frogs of the genus Telmatobius. This size variation seems to be associated with the duration of the larval stage and may affect the hind-limb morphology in Telmatobius. Larval, juvenile, and adult Telmatobius rubigo and T. oxycephalus were examined to determine the variation in relative sizes of hind-limb elements, their growth patterns during postmetamorphic life, and skeletal ontogeny. The results showed that the proportionately shorter hind limbs of T. rubigo relative to those of T. oxycephalus are associated with the protracted development and ossification of hind limbs during the prolonged larval life of T. rubigo. Postmetamorphically, the hind limbs grew faster than the body in juveniles of both species in contrast to the relative growth rates of the hind limbs and bodies of the adults. The growth phase of juvenile T. rubigo seems shorter than that of juvenile T. oxycephalus; possibly, this heightens the difference in the relative lengths of hind limbs after metamorphosis. Temperature affects the effects of thyroid hormone on growth and development, and T. rubigo lives at much higher, colder elevations than does T. oxycephalus. It is not clear whether the developmental differences described here are plastic (i.e., environmentally induced) or genetically fixed in each species.

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Section: Introductionmentioning

confidence: 99%

Variation in the growth and development of the hind limbs in frogs of the genus Telmatobius (Anura: Telmatobiidae)

Barrionuevo

2020

Journal of Morphology

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Intrasexually selected weapons

2018

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We propose a practical concept that distinguishes the particular kind of weaponry that has evolved to be used in combat between individuals of the same species and sex, which we term intrasexually selected weapons (ISWs). We present a treatise of ISWs in nature, aiming to understand their distinction and evolution from other secondary sex traits, including from 'sexually selected weapons', and from sexually dimorphic and monomorphic weaponry. We focus on the subset of secondary sex traits that are the result of same-sex combat, defined here as ISWs, provide not previously reported evolutionary patterns, and offer hypotheses to answer questions such as: why have only some species evolved weapons to fight for the opposite sex or breeding resources? We examined traits that seem to have evolved as ISWs in the entire animal phylogeny, restricting the classification of ISW to traits that are only present or enlarged in adults of one of the sexes, and are used as weapons during intrasexual fights. Because of the absence of behavioural data and, in many cases, lack of sexually discriminated series from juveniles to adults, we exclude the fossil record from this review. We merge morphological, ontogenetic, and behavioural information, and for the first time thoroughly review the tree of life to identify separate evolution of ISWs. We found that ISWs are only found in bilateral animals, appearing independently in nematodes, various groups of arthropods, and vertebrates. Our review sets a reference point to explore other taxa that we identify with potential ISWs for which behavioural or morphological studies are warranted. We establish that most ISWs come in pairs, are located in or near the head, are endo- or exoskeletal modifications, are overdeveloped structures compared with those found in females, are modified feeding structures and/or locomotor appendages, are most common in terrestrial taxa, are frequently used to guard females, territories, or both, and are also used in signalling displays to deter rivals and/or attract females. We also found that most taxa lack ISWs, that females of only a few species possess better-developed weapons than males, that the cases of independent evolution of ISWs are not evenly distributed across the phylogeny, and that animals possessing the most developed ISWs have non-hunting habits (e.g. herbivores) or are faunivores that prey on very small prey relative to their body size (e.g. insectivores). Bringing together perspectives from studies on a variety of taxa, we conceptualize that there are five ways in which a sexually dimorphic trait, apart from the primary sex traits, can be fixed: sexual selection, fecundity selection, parental role division, differential niche occupation between the sexes, and interference competition. We discuss these trends and the factors involved in the evolution of intrasexually selected weaponry in nature.

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A New Species ofTelmatobiusWiegmann, 1834, from the Eastern Cordillera Central of the Andes, Peru (Anura: Telmatobiidae), with Description of Its Tadpole, and Range Extension ofT. mendelsoniDe La Riva et al., 2012

Ttito

Landauro

Venegas

et al. 2016

Annals of Carnegie Museum

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A new species of Telmatobius (Amphibia, Anura, Telmatobiidae) from the Pacific slopes of the Andes, Peru

Cited by 5 publications

References 19 publications

Variation in the growth and development of the hind limbs in frogs of the genus Telmatobius (Anura: Telmatobiidae)

Variation in the growth and development of the hind limbs in frogs of the genus Telmatobius (Anura: Telmatobiidae)

Intrasexually selected weapons

A New Species ofTelmatobiusWiegmann, 1834, from the Eastern Cordillera Central of the Andes, Peru (Anura: Telmatobiidae), with Description of Its Tadpole, and Range Extension ofT. mendelsoniDe La Riva et al., 2012

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