scholarly journals Further observations on the nervous system of the American Leopard Frog (Rana Pipiens) compared with that of the European frogs (Rana esculenta and Rana temporaria)

1910 ◽  
Vol 20 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Henry H. Donaldson
Keyword(s):  
Nervous System ◽  
Rana Pipiens ◽  
Rana Temporaria ◽  
Rana Esculenta ◽  
Leopard Frog

Observations on the origin of the ‘germinal cytoplasm’ in Xenopus laevis

Development ◽  
1969 ◽  
Vol 22 (2) ◽  
pp. 229-251
Author(s):  
Renata Czołowska
Keyword(s):  
Xenopus Laevis ◽  
Germ Cells ◽  
Rana Pipiens ◽  
Rana Temporaria ◽  
Primordial Germ Cells ◽  
Rana Esculenta ◽  
Bufo Bufo ◽  
Discoglossus Pictus ◽  
Early Appearance ◽  
Vegetative Pole

The early appearance of the ‘germinal cytoplasm’ and its behaviour during the formation of cells which are thought to represent the primordial germ cells have been described in detail for Rana temporaria by Bounoure (1927, 1934, 1939) and Blackler (1958). These observations were extended to Xenopus laevis (Nieuwkoop, 1956; Nieuwkoop & Faber, 1956; Blackler, 1958), Bufo bufo (Blackler, 1958), Rana pipiens (Berardino, 1961), Discoglossus pictus (Gipouloux, 1962 a) and Rana esculenta (Hammer, cited by Blackler, 1965 b). The above findings agree with respect to the earliest detection of the ‘germinal cytoplasm’. Its first appearance was noticed as early as in the fertilized, unsegmented egg, where small, distinctly staining islands of cytoplasm are localized just under the cell membrane in an area around the vegetative pole of the egg. During cleavage the ‘germinal cytoplasm’ is distributed between the vegetative blastomeres directly surrounding the vegetative pole.

Hopping and swimming in the leopard frog,Rana pipiens: I. Step cycles and kinematics

1996 ◽  
Vol 230 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Susan E. Peters ◽  
Lynn T. Kamel ◽  
David P. Bashor
Keyword(s):  
Rana Pipiens ◽  
Leopard Frog

scholarly journals Redescription of the Frog Bladder Fluke Gorgoderina attenuata from the Northern Leopard Frog, Rana pipiens

2009 ◽  
Vol 95 (3) ◽  
pp. 665-668 ◽  
Author(s):  
Matthew G. Bolek ◽  
Scott D. Snyder ◽  
John Janovy
Keyword(s):  
Rana Pipiens ◽  
Leopard Frog ◽  
Northern Leopard Frog

GROWTH AND SURVIVAL OF NORTHERN LEOPARD FROG (RANA PIPIENS) TADPOLES EXPOSED TO TWO COMMON PESTICIDES

2009 ◽  
Vol 28 (7) ◽  
pp. 1469 ◽  
Author(s):  
Kausalya Shenoy ◽  
B. Thomas Cunningham ◽  
James W. Renfroe ◽  
Philip H. Crowley
Keyword(s):  
Rana Pipiens ◽  
Leopard Frog ◽  
Northern Leopard Frog ◽  
Growth And Survival
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