South American mammal zoogeography: evidence from convergent evolution in desert rodents.
نویسندگان
چکیده
منابع مشابه
South American mammal zoogeography: evidence from convergent evolution in desert rodents.
Current theories regarding colonization of South America by mammals are divided between those supported by fossil evidence, which suggest the original mammal fauna of the isolated continent was augmented by early immigrants (primates, caviomorph rodents, and later, procyonids) with a final large influx of northern mammals occurring with the formation of the Panama land bridge, and an opposing v...
متن کاملRenal morphology, phylogenetic history and desert adaptation of South American hystricognath rodents
1. To determine whether variation in kidney morphology is associated with environmental aridity in South American hystricognaths, we used conventional and phylogenetic analysis (independent contrasts) to correlate mass-independent renal variables (kidney size; relative medullar thickness, RMT; medulla/cortex ratio, MC; inner medulla/ cortex ratio, MIC; relative medullar area, RMA) with environm...
متن کاملOrigin and evolution of a major satellite DNA from South American rodents of the genus Ctenomys +
This article is about the origin, amplification and evolution of the major satellite DNA of South American rodents known popularly as tuco-tucos (genus Ctenomys). This satellite DNA, named RPCS, differentially amplified during the evolution of Ctenomys species, which resulted in quantitative and qualitative differences in restriction-periodicity patterns among species. A rolling circle amplific...
متن کاملConvergent evolution of alternative developmental trajectories associated with diapause in African and South American killifish.
Annual killifish adapted to life in seasonally ephemeral water-bodies exhibit desiccation resistant eggs that can undergo diapause, a period of developmental arrest, enabling them to traverse the otherwise inhospitable dry season. Environmental cues that potentially indicate the season can govern whether eggs enter a stage of diapause mid-way through development or skip this diapause and instea...
متن کاملEvidence for rolling-circle replication in a major satellite DNA from the South American rodents of the genus Ctenomys.
A major PvuII satellite DNA has been cloned from a South American octodontid rodent of the genus Ctenomys (C. porteousi). The satellite monomer, termed RPCS, is 337 bp in size and 42% G + C. Analysis of the nucleotide sequence demonstrates that RPCS is not composed of a series of shorter repeats. RPCS-related sequences were found in 11 of 12 Ctenomys species analyzed by hybridization under high...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1975
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.72.5.1702