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Faivovich Julián - One of the best experts on this subject based on the ideXlab platform.
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From erotic excrescences to pheromone shots: structure and diversity of Nuptial Pads in anurans
'Oxford University Press (OUP)', 2018Co-Authors: Luna, María Celeste, Mcdiarmid, Roy W, Faivovich JuliánAbstract:The Nuptial Pad is a secondary sexual character found in anuran amphibians. It includes modified epidermal and dermal tissues and is usually located on the first digit of the hand of males. In this study, we review the structure and diversity of Nuptial Pads based on a large-scale sample of morphological and phylogenetic diversity. Our findings show that all Nuptial Pads are characterized by the presence of specialized mucous glands in the dermal component. We also report the co-occurrence of other types of glands in some species and characterize their histochemistry. We describe three primary Nuptial Pad morphologies: (1) Nuptial Pads with papillary epidermal projections (or simply, papillae), in which the epidermal projections are formed by an epidermal and dermal evagination; (2) Nuptial Pads with non-papillary epidermal projections, in which the epidermal projections lack a dermal core forming a papilla; and (3) smooth Nuptial Pads, which lack projections but have a slight thickening of the dermal area with respect to the adjacent skin. We compare Nuptial Pads with other secondary sexual traits and discuss several related topics, including morphological diversity, coloration, hormonal control, taxonomic usefulness, and hypotheses regarding their role in reproduction.Fil: Luna, María Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Mcdiarmid, Roy W. National Museum of Natural History; Estados UnidosFil: Faivovich, Julián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentin
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FIGURE 3 in A new species of Scinax Wagler (Anura: Hylidae) from Mato Grosso, Brazil
2016Co-Authors: Araujo-vieira Katyuscia, Valdujo, Paula Hanna, Faivovich JuliánAbstract:FIGURE 3. Nuptial Pad of the left hand of Scinax haddadorum sp. nov., holotype (MZUSP 152328). A: Dorsal view. B: Ventral view. Scale bar = 1 mm
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A new species of Hyloscirtus (Anura: Hylidae) from Colombia, with a rediagnosis of Hyloscirtus Larinopygion (Duellman, 1973).
Herpetologists League, 2016Co-Authors: Rivera-correa Mauricio, Faivovich JuliánAbstract:Hyloscirtus larinopygion is rediagnosed, and a new species formerly confused with that species is described from the highlands of the Central Cordillera in the Andes Mountains of Colombia. The new species differs from the other species of the H. larinopygion group by its color pattern, iris coloration, and presence of a Nuptial Pad with dark-brown epidermal projections. We discuss variation and diversity of Nuptial Pads, the calcar tubercle, and some aspects related to the swollen cloacal region in the H. larinopygion group. Finally, we discuss reproductive biology and problems involving the definition of a putative synapomorphy of Hyloscirtus.Fil: Rivera-Correa, Mauricio. Pontificia Universidade Catolica Do Rio Grande Do Sul. Faculdade de Biociências; Brasil. Universidad de Antioquia; ColombiaFil: Faivovich, Julián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentin
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A new species of Scinax Wagler (Anura: Hylidae) from Mato Grosso, Brazil
'Magnolia Press', 2016Co-Authors: De Araujo Vieira Katyuscia, Valdujo, Paula Hanna, Faivovich JuliánAbstract:A new species of the Scinax ruber Clade is described from Municipality of Barra do Garças, State of Mato Grosso, Brazil. It is diagnosed by its size (SVL 29.4–35.4 mm in males); dorsum with a background that varies from light and dark gray to dark brown, with round and irregular dark blotches; hidden surfaces of thigh and shank light or dark brown, with lighter, large and irregular blotches (yellow in life); and Nuptial Pad that covers the medial margin of Metacarpal I, and obscures the posterior portion and the outer margin of the inner metacarpal tubercle. It is most similar with Scinax rupestris, from which it differs by having larger adult males; less developed Nuptial Pad; and hidden surfaces of thigh and light or dark brown, with lighter, large and irregular blotches (yellow in life). The new species occurs near the headwaters of permanent or temporary streams, where males call from vegetation or rocks at the margins of small streams.Fil: de Araujo Vieira, Katyuscia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Valdujo, Paula Hanna. World Wildlife Fund. Laboratório de Ecologia da Paisagem; BrasilFil: Faivovich, Julián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentin
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An extraordinary new species of Melanophryniscus (Anura, Bufonidae) from southeastern Brazil
Amer Museum Natural History, 2012Co-Authors: Peloso, Pedro L., Faivovich Julián, Grant Taran, Gasparini, Joao Luiz, Haddad, Celio Fernando BaptistaAbstract:We describe a new species of bufonid from a lowland, sandy soil, restinga habitat in the state of Espirito Santo, southeastern Brazil. Based on the shared occurrence of putative morphological synapomorphies of Melanophryniscus and the results of a phylogenetic analysis of DNA sequences of a broad sample of bufonids, and other anurans, we assign the new species to Melanophryniscus. The new species possesses several peculiar character states that distinguish it from all other Melanophryniscus including, but not limited to: fingers II, III, and V much reduced; Nuptial Pad with few enlarged, brown-colored spines on medial margin of finger II; seven presacral vertebrae, the last fused with the sacrum; and ventral humeral crest prominent, forming a spinelike projection.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP
Frances Orton - One of the best experts on this subject based on the ideXlab platform.
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exposure to an anti androgenic herbicide negatively impacts reproductive physiology and fertility in xenopus tropicalis
Scientific Reports, 2018Co-Authors: Frances Orton, Moa Safholm, Erika Jansson, Ylva Carlsson, Andreas Eriksson, Jerker Fick, Uren T Webster, T Mcmillan, M Leishman, Bas VerbruggenAbstract:Amphibians are threatened on a global scale and pollutants may be contributing to population declines, but how chemicals impact on their reproduction is poorly understood. We conducted a life cycle analysis to investigate the impacts of early life exposure to two anti-androgens (exposure until completion of metamorphosis;stage 66): flutamide, (50 µg/L)/linuron (9 and 45 µg/L)) on sexual development and breeding competence in Xenopus tropicalis. Our analyses included: mRNA levels of dmrt1, cyp17, amh, cyp19, foxl2 and ar (tadpoles/metamorphs), gonadal histomorphology (metamorphs/adults), mRNA levels of ar/gr (adult male brain/gonad/forelimb), testosterone/corticosterone levels (adult males), secondary sexual characteristics (forelimb width/Nuptial Pad: adult males) and breeding competence (amplexus/fertility: adult males). Compared to controls, feminised sex ratios and increased number of spermatogonia (adults) were observed after exposure to flutamide and the lower linuron concentration. Exposure to the lower linuron concentration also resulted in demasculinisation of secondary sexual characteristics and reduced male fertility. Flutamide exposure resulted in masculinisation of the Nuptial Pad and elevated mRNA levels of dmrt1, cyp17, amh and foxl2 in brains (metamorphs). Testosterone levels were higher in all treatment groups, however, overall few effects were observed in response to the higher linuron concentration. Our findings advance understanding of reproductive biology of X. tropicalis and illustrate negative effects of linuron on reproductive processes at a concentration measured in freshwater environments.
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Body size, Nuptial Pad size and hormone levels: potential non-destructive biomarkers of reproductive health in wild toads (Bufo bufo)
Ecotoxicology, 2014Co-Authors: Frances Orton, Alice Baynes, Frances Clare, Amanda L. J. Duffus, Severine Larroze, Martin Scholze, Trenton W. J. GarnerAbstract:Amphibians are declining and fertility/fecundity are major drivers of population stability. The development of non-destructive methods to assess reproductive health are needed as destructive measures are fundamentally at odds with conservation goals for declining species. We investigated the utility of body size, Nuptial Pad size and forelimb width as non-destructive biomarkers of internal reproductive physiology, by analysing correlations with commonly used destructive methods in adult male toads ( Bufo bufo ) from a low human impact and a high human impact site. Principal component analyses revealed that size was the most important variable for explaining inter-individual differences in other measured endpoints, both non-destructive and destructive, except for hormone levels and Nuptial Pad, which were independent of size. Toads from the LI and the HI site differed in almost all of the measured endpoints; this was largely driven by the significantly smaller size of toads from the HI site. Correlational analyses within sites revealed that size was correlated with several reproductive endpoints in toads from the HI site but not the LI site, indicating a possible limiting effect of size on reproductive physiology. Intersex was observed in 33 % of toads from the HI site and incidence was not related to any other measured endpoint. In conclusion, we provide evidence that size is associated with reproductive physiology and that Nuptial Pad/hormone levels have potential as additional markers due to their independence from size. We also show that human activities can have a negative effect on reproductive physiology of the common toad.
Trenton W. J. Garner - One of the best experts on this subject based on the ideXlab platform.
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Body size, Nuptial Pad size and hormone levels: potential non-destructive biomarkers of reproductive health in wild toads (Bufo bufo)
Ecotoxicology, 2014Co-Authors: Frances Orton, Alice Baynes, Frances Clare, Amanda L. J. Duffus, Severine Larroze, Martin Scholze, Trenton W. J. GarnerAbstract:Amphibians are declining and fertility/fecundity are major drivers of population stability. The development of non-destructive methods to assess reproductive health are needed as destructive measures are fundamentally at odds with conservation goals for declining species. We investigated the utility of body size, Nuptial Pad size and forelimb width as non-destructive biomarkers of internal reproductive physiology, by analysing correlations with commonly used destructive methods in adult male toads ( Bufo bufo ) from a low human impact and a high human impact site. Principal component analyses revealed that size was the most important variable for explaining inter-individual differences in other measured endpoints, both non-destructive and destructive, except for hormone levels and Nuptial Pad, which were independent of size. Toads from the LI and the HI site differed in almost all of the measured endpoints; this was largely driven by the significantly smaller size of toads from the HI site. Correlational analyses within sites revealed that size was correlated with several reproductive endpoints in toads from the HI site but not the LI site, indicating a possible limiting effect of size on reproductive physiology. Intersex was observed in 33 % of toads from the HI site and incidence was not related to any other measured endpoint. In conclusion, we provide evidence that size is associated with reproductive physiology and that Nuptial Pad/hormone levels have potential as additional markers due to their independence from size. We also show that human activities can have a negative effect on reproductive physiology of the common toad.
Bin Wang - One of the best experts on this subject based on the ideXlab platform.
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a new species of the music frog nidirana anura ranidae from guizhou province china
ZooKeys, 2020Co-Authors: Gang Wei, Jing Liu, Yanlin Cheng, Bin WangAbstract:The Music frog genus Nidirana is widely distributed in East and South Asia. Here, a new species of the genus is described from southwestern China. Phylogenetic analyses based on the mitochondrial 16S rRNA and COI gene sequences supported the new species as a clade closely related to N. leishanensis, N. hainanensis, N. chapaensis, N. daunchina, and N. yaoica. The new species could be distinguished from its congeners by a combination of the following characters: body of medium size (SVL 41.2-43.5 mm in males and 44.7 mm in female); lateroventral groove only present on toes; relative finger lengths: II < IV < I < III; three metatarsal tubercles on palm; heels overlapping when hindlimbs flexed at right angles to axis of body; tibiotarsal articulation reaching the level of eye when leg stretched forward; a pair of subgular internal vocal sacs at corners of throat in male; Nuptial Pad present on the inner side of base of fingers I in breeding male; tadpole labial tooth row formula with 1:1+1/1+1:2; in males, the advertisement call contains two kinds of notes and one call contains 2-6 repeated regular notes.
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a new species of the odorous frog genus odorrana amphibia anura ranidae from southwestern china
PeerJ, 2018Co-Authors: Jianping Jiang, Gang Wei, Bin WangAbstract:The genus Odorrana is widely distributed in the mountains of East and Southeastern Asia. An increasing number of new species in the genus have been recognized especially in the last decade. Phylogenetic studies of the O. schmackeri species complex with wide distributional range also revealed several cryptic species. Here, we describe a new species in the species complex from Guizhou Province of China. Phylogenetic analyses based on mitochondrial DNA indicated the new species as a monophyly clustered into the Odorrana clade and sister to O. schmackeri, and nuclear DNA also indicated it as an independent lineage separated from its related species. Morphologically, the new species can be distinguished from its congeners based on a combination of the following characters: (1) having smaller body size in males (snout-vent length (SVL) <43.3 mm); (2) head longer than wide; (3) dorsolateral folds absent; (4) tympanum of males large and distinct, tympanum diameter twice as long as width of distal phalanx of finger III; (5) two metacarpal tubercles; (6) relative finger lengths: II < I < IV < III; (7) tibiotarsal articulation reaching to the level between eye to nostril when leg stretched forward; (8) disks on digits with circum-marginal grooves; (9) toes fully webbed to disks; (10) the first subarticular tubercle on fingers weak; (11) having white pectoral spinules, paired subgular vocal sacs located at corners of throat, light yellow Nuptial Pad on the first finger in males.
Martin Scholze - One of the best experts on this subject based on the ideXlab platform.
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Body size, Nuptial Pad size and hormone levels: potential non-destructive biomarkers of reproductive health in wild toads (Bufo bufo)
Ecotoxicology, 2014Co-Authors: Frances Orton, Alice Baynes, Frances Clare, Amanda L. J. Duffus, Severine Larroze, Martin Scholze, Trenton W. J. GarnerAbstract:Amphibians are declining and fertility/fecundity are major drivers of population stability. The development of non-destructive methods to assess reproductive health are needed as destructive measures are fundamentally at odds with conservation goals for declining species. We investigated the utility of body size, Nuptial Pad size and forelimb width as non-destructive biomarkers of internal reproductive physiology, by analysing correlations with commonly used destructive methods in adult male toads ( Bufo bufo ) from a low human impact and a high human impact site. Principal component analyses revealed that size was the most important variable for explaining inter-individual differences in other measured endpoints, both non-destructive and destructive, except for hormone levels and Nuptial Pad, which were independent of size. Toads from the LI and the HI site differed in almost all of the measured endpoints; this was largely driven by the significantly smaller size of toads from the HI site. Correlational analyses within sites revealed that size was correlated with several reproductive endpoints in toads from the HI site but not the LI site, indicating a possible limiting effect of size on reproductive physiology. Intersex was observed in 33 % of toads from the HI site and incidence was not related to any other measured endpoint. In conclusion, we provide evidence that size is associated with reproductive physiology and that Nuptial Pad/hormone levels have potential as additional markers due to their independence from size. We also show that human activities can have a negative effect on reproductive physiology of the common toad.
