ESCAPE EFFICIENCY OF DIPLOID AND POLYPLOID FROGS: A COMPARISON OF ODONTOPHRYNUS CULTRIPES (2N=22) AND O. AMERICANUS (4N=44)MURPHEY RM; BECAK W; DIAS DE MORAES AE et al.1981; BEHAV. GENET.; ISSN 0001-8244; USA; DA. 1981; VOL. 11; NO 3; PP. 255-265; BIBL. 2 P.Article

ORIGIN OF THE SYNAPTONEMAL COMPLEXBECAK ML; BECAK W.1972; EXPERIENTIA; SUISSE; DA. 1972; VOL. 28; NO 11; PP. 1367-1369; ABS. FR.; BIBL. 15 REF.Serial Issue

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ELECTROPHORETIC STUDIES ON POLYPLOID AMPHIBIANS. III. LACK OF LOCUS DUPLICATION EVIDENCES THROUGH TETRAPLOIDIZATION.BARCELLOS SCHWANTES ML; RUDI SCHWANTES A.1977; COMP. BIOCHEM. PHYSIOL., B; G.B.; DA. 1977; VOL. 57; NO 4; PP. 341-351; BIBL. 2 P. 1/2Article

CHROMOSOME SECONDARY CONSTRICTIONS IN DIFFERENT STAGES OF DEVELOPMENT = CONSTRICTIONS SECONDAIRES DES CHROMOSOMES A DIVERS STADES DU DEVELOPPEMENTLUIZA BECAK M; BECAK W.1973; EXPERIENTIA; SUISSE; DA. 1973; VOL. 29; NO 3; PP. 359-361; ABS. ALLEM.; BIBL. DISSEM.Serial Issue

ELECTROPHORETIC STUDIES ON POLYPLOID AMPHIBIANS. II. PEPTIDASES.SCHWANTES MLB; SCHWANTES AR.1977; COMP. BIOCHEM. PHYSIOL., B; G.B.; DA. 1977; VOL. 58; NO 3; PP. 221-226; BIBL. 34 REF.Article

THE REDUCTION OF GENIC ACTIVITY IN THE TETRAPLOID AMPHIBIAN ODONTOPHRYNUS AMERICANUS IS NOT DUE TO LOSS OF RIBOSOMAL DNA = LA REDUCTION D'ACTIVITE GENIQUE CHEZ L'AMPHIBIEN TETRAPLOIDE O. A. N'EST PAS DUE A LA PERTE D'ARN RIBOSOMIQUESCHMIDTKE J; BECAK W; ENGEL W et al.1976; EXPERIENTIA; SUISSE; DA. 1976; VOL. 32; NO 1; PP. 27-28; BIBL. 20 REF.Article

CHROMOSOME STRUCTURE; HALF-CHROMATIDS IN CHLOROFORM TREATED METAPHASESBECAK ML.1974; EXPERIENTIA; SUISSE; DA. 1974; VOL. 30; NO 10; PP. 1138-1140; ABS. ALLEM.; BIBL. 16REF.Article

IN SITU LOCALIZATION OF RIBOSOMAL GENES IN A NATURAL TRIPLOID OF ODONTOPHRYNUSRUIZ IRG; BONALDO MF; BECAK W et al.1980; J. HERED.; USA; DA. 1980; VOL. 71; NO 1; PP. 55-57; BIBL. 7 REF.Article

Active nucleolar-organizer regions in polyploid populations of Odontophrynus americanus (Amphibia, Anura) from South BrasilRUIZ, I. R. G; DE ALMEIDA, T. M. B; BECAK, W et al.Genetica ('s-Gravenhage). 1984, Vol 63, Num 1, pp 31-37, issn 0016-6707Article

CHROMATIN CIRCLES IN AMPHIBIAN PREVITELLOGENIC OOCYTESBECAK ML; PIZZOCARO KF.1980; EXPERIENTIA; CHE; DA. 1980; VOL. 36; NO 2; PP. 164-166; BIBL. 13 REF.Article

Ribosomal RNA structure in the diploid and phylogenetically polyploid amphibian species Hyla and OdontophrynusLEIPOLDT, M; KELLNER, M.Comparative biochemistry and physiology. B. Comparative biochemistry. 1984, Vol 79, Num 2, pp 181-185, issn 0305-0491Article

CIRCLES IN SPERMATOCYTE CHROMATIN LOOPS. ELECTRON MICROSCOPY AND AG-AS NORS STUDIES.BECAK ML; MENDES CARNEIRO S; FUKUDA K et al.1978; EXPERIENTIA; SUISSE; DA. 1978; VOL. 34; NO 2; PP. 171-173; BIBL. 13 REF.Article

CHROMATIN ULTRASTRUCTURE OF LOWER VERTEBRATES.BECAK ML; FUKUDA K; MENDES CARNEIRO S et al.1977; EXPERIENTIA; SUISSE; DA. 1977; VOL. 33; NO 10; PP. 1314-1316; BIBL. 15 REF.Article

ARRANGEMENT OF NUCLEOSOMES IN CONDENSED CHROMATIN FIBRESBECAK ML; FUKUDA K.1979; EXPERIENTIA; CHE; DA. 1979; VOL. 35; NO 1; PP. 24-26; BIBL. 13 REF.Article

NUCLEOLAR ORGANIZER REGIONS AND CONSTITUTIVE HETEROCHROMATIN IN POLYPLOID SPECIES OF THE GENUS ODONTOPHRYNUS (AMPHIBIA, ANURA)RUIZ IRG; SOMA M; BECAK W et al.1981; CYTOGENET. CELL GENET.; ISSN 0301-0171; CHE; DA. 1981; VOL. 29; NO 2; PP. 84-98; BIBL. 22 REF.Article

DIFFERENCES IN LARVAL MORPHOLOGY OF ALLOPATRIC ISOLATED POPULATIONS OF THE ODONTOPHRYNUS OCCIDENTALIS GROUP FROM WESTERN ARGENTINACEI JM; CRESPO EG.1982; ANQ. MUS. BOCAGE, SER. A; ISSN 510777; PRT; DA. 1982; VOL. 1; NO 14; PP. 335-340; ABS. POR; BIBL. 4 REF.Serial Issue

Evolution by polyploidy in Amphibia : new insightsBECAK, M. L; BECAK, W.Cytogenetics and cell genetics. 1998, Vol 80, Num 1-4, pp 28-33, issn 0301-0171Article

Chromosome banding in amphibia. IX: The polyploid karyotypes of Odontophrynus americanus and Ceratophrys ornata (Anura, Leptodactylidae)SCHMID, M; HAAF, T; SCHEMPP, W et al.Chromosoma (Berlin. Print). 1985, Vol 91, Num 3-4, pp 172-184, issn 0009-5915Article

First Report of Nematodes in the Common Lesser Escuerzo Odontophrynus americanus (Duméril and Bibron, 1841) (Amphibia: Cycloramphidae) from Corrientes, ArgentinaGONZALEZ, Cynthya Elizabeth; INES HAMANN, Monika.Comparative parasitology. 2009, Vol 76, Num 1, pp 122-126, issn 1525-2647, 5 p.Article

The effect of pH and metal chelators upon the sedimentation velocity of Odontophrynus americanus vitellogeninWINTER, C. E; FLOETER-WINTER, L. M; AFFONSO, M. H. T et al.Brazilian journal of medical and biological research. 1991, Vol 24, Num 1, pp 1-11, issn 0100-879X, 11 p.Article

Utilization of O-phthalaldehyde-sulphuric acid as spray reagent in thin-layer chromatographic detection of some indolealkylamines and application to cutaneous secretion extracts of toad speciesDE LIMA, C. G; PASTORE, T. C. M; SCHWARTZ, C. A et al.Talanta (Oxford). 1991, Vol 38, Num 11, pp 1303-1307, issn 0039-9140Article

Methylation of ribosomal cistrons in diploid and tetraploid Odontophrynus americanus (Amphibia, Anura)RUIZ, I. R. G; BRISON, O.Chromosoma (Berlin. Print). 1989, Vol 98, Num 2, pp 86-92, issn 0009-5915Article

Spermiogenesis in Odontophrynus cultripes (Amphibia, anura, leptodactylidae) : ultrastructural and cytochemical studies of proteins using E-PTABAO, S. N; DALTON, G. C; DE OLIVEIRA, S. F et al.Journal of morphology (1931). 1991, Vol 207, Num 3, pp 303-314, issn 0362-2525Article

Comparative study of immature erythroid cells of the diploid Bufo ictericus and the tetraploid Odontophrynus americanus (Amphibia,Anura) : ultrastructural cytochemical detection of nucleic acids and polysaccharides, and mapping of the element phosphorusCIANCIARULLO, A. M; MEIRELLES, M. DE N. L.Cell and tissue research. 1994, Vol 278, Num 1, pp 187-195, issn 0302-766XArticle