Results 141 to 150 of about 725 (180)

Diploidization inEleutherodactylus (Leptodactylidae-amphibia)

Experientia, 1974
El contenido de DNA deE. binotatus (2n=22) es cerca de cuatro veces mayor que el deE. guentheri (2n=22) yE. parvus (2n=22). Ese aumento drastico podria ser resultado de duplicationes intersticiales y/o poliploidia, con translocaciones multiples.
M L, Beçak, W, Beçak
openaire   +2 more sources

Tadpole of Odontophrynus moratoi (Anura, Leptodactylidae)

Journal of Herpetology, 1996
Departamento de Zoologia Universidade Estadual Paulista, Caixa Postal 136, CEP 15054-000, Sao Jose do Rio ...
De Rossa-Feres, Denise C., Jim, Jorge
openaire   +2 more sources

Karyotypes of Leptodactylidae Anurans

Journal of Herpetology, 1972
Karyotypes of 8 species of Leptodactylidae amphibians were studied. They constitute two groups with 2n=22 and 2n=26 chromosomes. Centric fusions and pericentric inversions are the most important mechanisms of karyotype differentiation among these species. Cytophotometric measurements of 7 species showed a gradual increase of DNA content. * * *
openaire   +1 more source

Sperm morphology of Batrachyla (Anura: Leptodactylidae)

Amphibia-Reptilia, 1989
Abstract The structure of immature and mature sperm of the three species of Batrachyla were compared by using smears for light microscopy and ultrathin sections for transmission electron microscopy. Minor differences in length and some ultrastructural details support the notion that B. antartandica and B, taeniata are more closely related to
Orlando Garrido, Emilio Pugin, Boris Jorquera   +2 more
openaire   +1 more source

Evolution of macroglands and defensive mechanisms in Leiuperinae (Anura: Leptodactylidae)

Zoological Journal of the Linnean Society, 2020
Abstract Anurans show a wide variety of anti-predator mechanisms, and the species of the Neotropical clade Leiuperinae display several of them. Most species of Edalorhina, Physalaemus and Pleurodema show eyespots, hidden bright colours, macroglands in a inguinal/lumbar position, defensive behaviours and/or chemical defence.
Daiana Paola Ferraro, Martín Oscar Pereyra, Pascual Emilio Topa, Julián Faivovich   +3 more
openaire   +3 more sources

The Tadpole of Physalaemus albonotatus (Anura: Leptodactylidae)

Journal of Herpetology, 2004
Abstract We describe the tadpole of Physalaemus albonotatus (Anura, Leptodactylidae), from specimens collected from northeastern Argentina. The distinguishing characteristics (Stage 36) are (1) labial tooth row formula: 2(2)/3(1); (2) rostral gap about 2.5 times greater than mental gap; (3) body length of 10.00 mm and total length of 24.20 mm; and (4 ...
Arturo I. Kehr, Eduardo F. Schaefer, Marta I. Duré   +2 more
openaire   +1 more source

Spawning behaviour of Engystomops pustulatus (Anura: Leptodactylidae)

Journal of Natural History, 2016
ABSTRACTFoam nests have evolved independently in several amphibian groups as an adaptive response to prevent predation and desiccation in dry environments. Nests are normally laid on ponds, or in underground galleries, humid forest leaf litter or terrestrial bromeliads.
Narváez, Andrea E., Ron, Santiago R.
openaire   +2 more sources

Embryonic Mortality in Pseudophryne (Anura: Leptodactylidae)

Copeia, 1976
. 1972b. The developmental biology of annual fishes. II. Naturally occurring dispersion and reaggregation of blastomeres during the development of annual fish eggs. J. Exp. Zool. 182:169-200. 67. Fundulus, p. 113-122. In: Methods evelopmental biol gy. F Wilt and N. Wessels s.). Thomas Y. Crowell Co., New York. r s, J. P. 1967. Annual fishe , p. 123-137.
openaire   +1 more source

New chromosome numbers in Australian Leptodactylidae (Amphibia, Salientia)

Experientia, 1974
Fra i Leptodactylidi Australiani,Cyclorana alboguttatus ha 2n=26 come le forme piu generalizzate della famiglia, mentre alcune specie diLimnodynastes hanno 2n=22; specie di altri 5 generi hanno 2n=24. Fra questi ultimi, il problematicoRheobatrachus, completamente acquatico, possiede alcuni microcromosomi come i membri piu primitivi dell'ordine.
A, Morescalchi, G J, Ingram
openaire   +2 more sources

GENUS SYRRHOPHUS (ANURA: LEPTODACTYLIDAE) IN LOUISIANA

The Southwestern Naturalist, 2004
Abstract The genus Syrrhophus is recorded for the first time from Louisiana due to the discovery of a population of Syrrhophus cystignathoides in Shreveport. The frogs have been documented during 4 years. Calling males and a female with large yolked eggs indicated that this species was reproducing and surviving.
openaire   +1 more source