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Turazzini GF, Gómez RO. Comparative osteology of paradoxical frogs (Hylidae: Pseudae) with comments on diagnostic features, evolutionary trends and potential aquatic adaptations. ZOOL ANZ 2023. [DOI: 10.1016/j.jcz.2023.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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2
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Valchi P, Ponssa ML, Farías A, Volonteri MC, Hermida GN. Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny. ZOOL ANZ 2022. [DOI: 10.1016/j.jcz.2022.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Comparative sperm morphology of Proceratophrys and Odontophrynus (Anura, Odontophrynidae). Micron 2019; 125:102713. [PMID: 31419702 DOI: 10.1016/j.micron.2019.102713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/07/2019] [Accepted: 07/07/2019] [Indexed: 11/22/2022]
Abstract
The ultrastructure of the spermatozoa of seven species of Proceratophrys and one of Odontophrynus was analyzed in the present study. The sperm of Odontophrynus juquinha is similar to that of Odontophrynus cultripes, previously described, and to those of Proceratophrys branti, Proceratophrys bigibbosa, Proceratophrys affinis concavitympanum, Proceratophrys huntingtoni, Proceratophrys conformis moratoi, P. moratoi, and Proceratophrys palustris, in relation to the acrosomal vesicle and the subacrosomal cone that covers the anterior region of the nucleus in the sperm head. We observed transverse striations in the midpiece of the Odontophrynus juquinha sperm, a feature not observed in any Proceratophrys species. The sperm tail of all the studied species had a simple flagella and single axoneme associated with auxiliary structures (juxta-axonemal + undulating membrane + axial fiber). However, the juxta-axonemal fiber is thicker and the undulating membrane is shorter in Proceratophrys in comparison with Odontophrynus. In addition to differentiating these two genera, these features represent a possible autapomorphy in Proceratophrys.
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4
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Turani B, Aliko V, Shkembi E. Characterization of Albanian water frog, Pelophylax shqipericus, sperm traits and morphology, by using phase contrast microscopy. Microsc Res Tech 2019; 82:1802-1809. [PMID: 31313452 DOI: 10.1002/jemt.23346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/28/2019] [Accepted: 06/13/2019] [Indexed: 11/10/2022]
Abstract
Mature spermatozoa traits and morphology of endangered Albanian water frog, Pelophylax shqipericus, have been characterized for the first time through phase contrast microscopy, as part of successful implementation of in vitro fertilization technique for this species. The basic morphology of P. shqipericus spermatozoa consists of an elongated, thick, smooth-edged, and solid-staining head, continuing with a thin and long tail which usually extends 2.48 times the head length. The acrosome was not clearly discernible so the measurements were done on the head as a whole, while the middle section was better visible. Average length of head, including the acrosome and midsection was estimated to be 11.78 μm ± 0.32, while the tail length resulted 29.24 ± 1.75 μm. The average thickness of the head was shown to be 3.45 μm. The total sperm length resulted to be 41.02 ± 1.83 μm. The average sperm concentration was estimated of 25.5 × 106 /ml. Sperm amount, survival rate and motility were also measured. The sperm survival rate was maximal immediately after preparation of the suspension and tended to decrease over time of storage, reaching 50% after 72 hr. Decreased sperm motility seemed to follow the same trend as sperm viability. Sperm traits resulted to be very similar both in size and in shape with those of "Lessonae" frog group, one of the lineages of Western Palearctic species complex, suggesting a strong phylogenetic relationship among these species.
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Affiliation(s)
- Blerta Turani
- University of Tirana, Faculty of Natural Sciences, Tirana, Albania
| | - Valbona Aliko
- University of Tirana, Faculty of Natural Sciences, Tirana, Albania
| | - Entela Shkembi
- Semiology Laboratory, Medical Center, Dani Andrology, Tirana, Albania
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Alfonso YU, Rodríguez-Gómez Y, Charruau P, Sanz-Ochotorena A, Krysko KL. Oviposition and Gonadal Ultrastructure in the Cuban Groin-spot Frog,Eleutherodactylus atkinsiDunn, 1925 (Anura: Eleutherodactylidae). COPEIA 2017. [DOI: 10.1643/ch-17-633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Della Togna G, Trudeau VL, Gratwicke B, Evans M, Augustine L, Chia H, Bronikowski EJ, Murphy JB, Comizzoli P. Effects of hormonal stimulation on the concentration and quality of excreted spermatozoa in the critically endangered Panamanian golden frog (Atelopus zeteki). Theriogenology 2017; 91:27-35. [DOI: 10.1016/j.theriogenology.2016.12.033] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/26/2016] [Accepted: 12/26/2016] [Indexed: 11/29/2022]
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7
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Santos JS, Introíni GO, Veiga-Menoncello ACP, Blasco A, Rivera M, Recco-Pimentel SM. Comparative sperm ultrastructure of twelve leptodactylid frog species with insights into their phylogenetic relationships. Micron 2016; 91:1-10. [PMID: 27644081 DOI: 10.1016/j.micron.2016.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/01/2016] [Accepted: 09/02/2016] [Indexed: 11/29/2022]
Abstract
The spermatozoa of representatives of three Neotropical frog subfamilies, Leiuperinae, Leptodactylinae and Paratelmatobiinae, were observed using Transmission Electron Microscopy, with the aim of identifying ultrastructural traits that provide insights into the phylogenetic relationships among these anurans, which are currently unclear. In the leiuperines, spermatozoa of Physalaemus albifrons, P. cicada, P. deimaticus and P. feioi were characterized by an acrosomal vesicle covering the subacrosomal cone that was not observed in the spermatozoa of Physalaemus centralis and P. cuvieri. The tail of the spermatozoa of P. albifrons, P. centralis, P. cicada, P. cuvieri, P. deimaticus, and P. feioi presented a long undulating membrane, whereas Engystomops petersi and E. freibergi, which form a sister clade to Physalaemus, had an axial fiber, which were absent in Physalaemus. Other leiuperine, E. puyango had an abaxonemal bulb-like swelling distally to the paraxonemal rod, which were also absent in Physalaemus. These differences support the revalidation of Engystomops as a true taxon, distinct from Physalaemus. The tail of the spermatozoa of E. petersi and E. freibergi was similar to that of Paratelmatobius poecilogaster (Paratelmatobiinae). The spermatozoa of Leptodactylus natalenis (Leptodactylinae) had undulating membrane and axial fiber, in contrast with Adenomera marmorata, which lacked these structures. Morphological differences between A. marmorata and L. natalensis sperm cells appeared to validate the allocation of A. marmorata into a genus distinct from Leptodactylus. Overall, dissimilarities in the spermatozoa of the leptodactylids provided an important phylogenetic signal for the understanding of their taxonomic relationships.
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Affiliation(s)
- Julio Sérgio Santos
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, 13083-863, Campinas, São Paulo, Brazil.
| | - Gisele Orlandi Introíni
- Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA, 90050-170, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Ana Cristina Prado Veiga-Menoncello
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, 13083-863, Campinas, São Paulo, Brazil.
| | - Ailin Blasco
- Escuela de Ciencias Biológicas, Pontifícia Universidad Católica Del Ecuador, Quito, Ecuador.
| | - Miryan Rivera
- Escuela de Ciencias Biológicas, Pontifícia Universidad Católica Del Ecuador, Quito, Ecuador.
| | - Shirlei Maria Recco-Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, 13083-863, Campinas, São Paulo, Brazil.
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Cruz JC, Ferraro DP, Farías A, Santos JS, Recco-Pimentel SM, Faivovich J, Hermida GN. A comparative ultrastructural analysis of spermatozoa in Pleurodema (Anura, Leptodactylidae, Leiuperinae). J Morphol 2016; 277:957-77. [PMID: 27151937 DOI: 10.1002/jmor.20550] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 03/10/2016] [Accepted: 04/05/2016] [Indexed: 11/06/2022]
Abstract
This study describes the spermatozoa of 10 of the 15 species of the Neotropical frog genus Pleurodema through transmission electron microscopy. The diversity of oviposition modes coupled with a recent phylogenetic hypothesis of Pleurodema makes it an interesting group for the study of ultrastructural sperm evolution in relation to fertilization environment and egg-clutch structure. We found that Pleurodema has an unusual variability in sperm morphology. The more variable structures were the acrosomal complex, the midpiece, and the tail. The acrosomal complex has all the structures commonly reported in hyloid frogs but with different degree of development of the subacrosomal cone. Regarding the midpiece, the variability is given by the presence or absence of the mitochondrial collar. Finally, the tail is the most variable structure, ranging from single (only axoneme) to more complex (presence of paraxonemal rod, cytoplasmic sheath, and undulating membrane), with the absence of the typical axial fiber present in hyloid frogs, also shared with some other genera of Leiuperinae. J. Morphol. 277:957-977, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Julio C Cruz
- Laboratorio Biología de Anfibios, Histología Animal, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.,Instituto de Bio y Geociencias (IBIGEO) - CONICET, Universidad de Salta, Salta, Argentina
| | - Daiana P Ferraro
- Instituto Nacional de Limnología (INALI) - CONICET, Santa Fe, Argentina.,División Herpetología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" - CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alejandro Farías
- Laboratorio Biología de Anfibios, Histología Animal, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julio S Santos
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Brazil
| | - Shirlei M Recco-Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Brazil
| | - Julián Faivovich
- División Herpetología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" - CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gladys N Hermida
- Laboratorio Biología de Anfibios, Histología Animal, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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9
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Salles NME, Zara FJ, Prado CPA. Differences in sperm morphology in foam-nesting leptodactyline frogs (Anura, Leptodactylidae). ACTA ZOOL-STOCKHOLM 2015. [DOI: 10.1111/azo.12144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natália M. E. Salles
- Programa de Pós-Graduação em Ciências Biológicas (Zoologia); Instituto de Biociências; Universidade Estadual Paulista; 13506-900 Rio Claro São Paulo Brazil
| | - Fernando J. Zara
- Departamento de Biologia Aplicada; Faculdade de Ciências Agrárias e Veterinárias; Universidade Estadual Paulista; 14884-900 Jaboticabal São Paulo Brazil
| | - Cynthia P. A. Prado
- Departamento de Morfologia e Fisiologia Animal; Faculdade de Ciências Agrárias e Veterinárias; Universidade Estadual Paulista; 14884-900 Jaboticabal São Paulo Brazil
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dos Santos JS, Introíni GO, Veiga-Menoncello ACP, Recco-Pimentel SM. Ultrastructure variation in the spermatozoa of Pseudopaludicola frogs (Amphibia, Anura, Leptodactylidae), with brief comments on its phylogenetic relevance. J Morphol 2015; 276:1495-504. [PMID: 26352290 DOI: 10.1002/jmor.20438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 08/07/2015] [Accepted: 08/16/2015] [Indexed: 11/11/2022]
Abstract
The taxonomic history of the small frogs of the genus Pseudopaludicola from South America has been controversial. Phylogenetic inferences based on molecular data have identified four Pseudopaludicola clades, correlating with the known variation in karyotypes (2n = 22, 20, 18, and 16). In this study, the ultrastructure of the spermatozoa was analyzed in 12 species of the Pseudopaludicola, with the aim of describing their morphology and identifying characters that may contribute to a better understanding of the phylogenetic relationships. The spermatozoa presented marked differences in tail structures. The tails of the spermatozoa of the species with 2n = 22 chromosomes (Pseudopaludicola sp. 1 [P. pusilla group], Pseudopaludicola falcipes, P. mineira, and Pseudopaludicola saltica), as well as Pseudopaludicola ameghini and Pseudopaludicola ternetzi (2n=20), have juxta-axonemal fibers, undulating membranes and axial fibers. In contrast, in the species with 2n = 18 (P. facureae, P. giarettai, Pseudopaludicola canga, P. atragula, and Pseudopaludicola sp. 2) and 2n = 16 (Pseudopaludicola mystacalis), there are no evident axial or juxta-axonemal fibers, but a paraxonemal rod with a thick undulating membrane, which is shorter than that found among Pseudopaludicola species. The ultrastructural morphological differences observed in the spermatozoa of these species may be phylogenetically informative, given that they coincide with the consensus phylogeny of the group and appear to represent a progressive simplification of the spermatozoon.
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Affiliation(s)
- Julio Sérgio dos Santos
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-863 Campinas, São Paulo, Brazil
| | - Gisele Orlandi Introíni
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-863 Campinas, São Paulo, Brazil.,Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), 245, Porto Alegre, Rio Grande do Sul, 90050-170, Brazil
| | - Ana Cristina Prado Veiga-Menoncello
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-863 Campinas, São Paulo, Brazil
| | - Shirlei Maria Recco-Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-863 Campinas, São Paulo, Brazil
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11
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Browne R, Kaurova S, Uteshev V, Shishova N, McGinnity D, Figiel C, Mansour N, Agnew D, Wu M, Gakhova E, Dzyuba B, Cosson J. Sperm motility of externally fertilizing fish and amphibians. Theriogenology 2015; 83:1-13. [DOI: 10.1016/j.theriogenology.2014.09.018] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 09/08/2014] [Accepted: 09/11/2014] [Indexed: 12/15/2022]
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12
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Beguelini MR, Taboga SR, Morielle-Versute E. Ultrastructural characteristics of spermatogenesis in Pallas's mastiff bat, Molossus molossus (Chiroptera: Molossidae). Microsc Res Tech 2012; 75:856-68. [DOI: 10.1002/jemt.22005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 12/01/2011] [Indexed: 11/10/2022]
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13
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Beguelini MR, Puga CC, Taboga SR, Morielle-Versute E. Ultrastructure of spermatogenesis in the white-lined broad-nosed bat, Platyrrhinus lineatus (Chiroptera: Phyllostomidae). Micron 2011; 42:586-99. [DOI: 10.1016/j.micron.2011.02.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Revised: 02/11/2011] [Accepted: 02/13/2011] [Indexed: 11/17/2022]
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Roberts JD, Byrne PG. Polyandry, Sperm Competition, and the Evolution of Anuran Amphibians. ADVANCES IN THE STUDY OF BEHAVIOR 2011. [DOI: 10.1016/b978-0-12-380896-7.00001-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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15
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Maciel NM, Collevatti RG, Colli GR, Schwartz EF. Late Miocene diversification and phylogenetic relationships of the huge toads in the Rhinella marina (Linnaeus, 1758) species group (Anura: Bufonidae). Mol Phylogenet Evol 2010; 57:787-97. [DOI: 10.1016/j.ympev.2010.08.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 08/23/2010] [Accepted: 08/23/2010] [Indexed: 10/19/2022]
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Dziminski MA, Roberts JD, Simmons LW. Sperm morphology, motility and fertilisation capacity in the myobatrachid frog Crinia georgiana. Reprod Fertil Dev 2010; 22:516-22. [DOI: 10.1071/rd09124] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2009] [Accepted: 09/10/2009] [Indexed: 11/23/2022] Open
Abstract
Sperm traits have been found to vary between individuals within populations in a variety of taxa. Sperm motility, morphometry and viability may be expected to have important effects on male fertility, although previous studies have found varying patterns, especially in external fertilisers. In the present study, we examined the effects of sperm swimming velocity, the proportion of motile spermatozoa, sperm head and tail length and the proportion of live spermatozoa on fertilisation success in the externally fertilising myobatrachid frog Crinia georgiana using IVF techniques and by controlling sperm numbers. We found no effect of any of the sperm traits we measured on IVF success. Neither did we find any relationship between sperm morphology and sperm performance. There was a negative relationship between sperm viability and male body size, which could be a function of age or an alternative tactic of differential investment in spermatozoa by smaller-sized males using sneak tactics in multiple matings. In contrast with most externally fertilising aquatic organisms, high rates of fertilisation appear to be achieved in C. georgiana with relatively low sperm swimming speeds.
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Aguiar O, Bacci M, Lima AP, Rossa-Feres DC, Haddad CFB, Recco-Pimentel SM. Phylogenetic relationships of Pseudis and Lysapsus (Anura, Hylidae, Hylinae) inferred from mitochondrial and nuclear gene sequences. Cladistics 2007. [DOI: 10.1111/j.1096-0031.2007.00154.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Phylogeny and biogeography of paradoxical frogs (Anura, Hylidae, Pseudae) inferred from 12S and 16S mitochondrial DNA. Mol Phylogenet Evol 2007; 44:104-14. [DOI: 10.1016/j.ympev.2006.11.028] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2006] [Revised: 11/21/2006] [Accepted: 11/22/2006] [Indexed: 11/19/2022]
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19
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Busin CS, Lima AP, de Almeida Prado CP, Strüssmann C, Júnior SS, Recco-Pimentel SM. Chromosomal differentiation of populations of Lysapsus limellus limellus, L. l. bolivianus, and of Lysapsus caraya (Hylinae, Hylidae). Micron 2006; 37:355-62. [PMID: 16448818 DOI: 10.1016/j.micron.2005.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2005] [Revised: 11/10/2005] [Accepted: 11/11/2005] [Indexed: 10/25/2022]
Abstract
Cytogenetic analysis were done on specimens from two populations of Lysapsus limellus limellus, three of L. l. bolivianus and of one of Lysapsus caraya. All animals showed a diploid chromosomal number of 2n=24. The karyotypes of the two L. limellus subspecies were very similar, differing only by the larger amount of telomeric heterochromatin and a small pericentromeric C-band on the short arms of pair 2 in L. l. limellus specimens. The karyotype of L. caraya differed from those of the two L. limellus subspecies in terms of chromosomal morphology, C-banding pattern and location of the main NOR on chromosomes 7 and 6, respectively. The karyotype of the L. l. bolivianus population from Guajará-Mirim/RO differed from those of the other populations of the same subspecies in morphology and heterochromatin pattern of chromosomes 7 and 8. Additional NORs were detected by silver staining and confirmed by FISH in one of the homologues of pairs 1 and 8 in L. l. bolivianus and in pair 7 in L. caraya. These results suggest that a reassessment of the taxonomic status of L. limellus subspecies, especially of the L. l. bolivianus populations, may be necessary.
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Affiliation(s)
- Carmen Sílvia Busin
- Departamento de Biologia Celular, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), CP 6109, 13083-863 Campinas, SP, Brazil
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Alcalde L, Barg M. Chondrocranium and cranial muscle morphology in Lysapsus and Pseudis tadpoles (Anura: Hylidae: Hylinae). ACTA ZOOL-STOCKHOLM 2006. [DOI: 10.1111/j.1463-6395.2006.00205.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Veiga-Menoncello ACP, Lima AP, Recco-Pimentel SM. Sperm morphology of five species of Colostethus (Anura, Dendrobatidae) from Brazil, with phylogenetic comments. ACTA ZOOL-STOCKHOLM 2006. [DOI: 10.1111/j.1463-6395.2006.00229.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Costa GC, Garda AA, Teixeira RD, Colli GR, Báo SN. Comparative analysis of the sperm ultrastructure of three species of Phyllomedusa (Anura, Hylidae). ACTA ZOOL-STOCKHOLM 2005. [DOI: 10.1111/j.0001-7272.2004.00179.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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FAIVOVICH JULIÁN, HADDAD CÉLIOF, GARCIA PAULOC, FROST DARRELR, CAMPBELL JONATHANA, WHEELER WARDC. SYSTEMATIC REVIEW OF THE FROG FAMILY HYLIDAE, WITH SPECIAL REFERENCE TO HYLINAE: PHYLOGENETIC ANALYSIS AND TAXONOMIC REVISION. BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY 2005. [DOI: 10.1206/0003-0090(2005)294[0001:srotff]2.0.co;2] [Citation(s) in RCA: 466] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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