Carey Krajewski

Learn More
Relationships among the seven extant orders of marsupials remain poorly understood. Most classifications recognize a fundamental split between Ameridelphia, which contains the American orders Didelphimorphia and Paucituberculata, and Australidelphia, which contains four Australasian orders (Dasyuromorphia, Diprotodontia, Notoryctemorphia, and Peramelina)(More)
Opinions on the systematic relationships of birds in the avian order Gruiformes have been as diverse as the families included within it. Despite ongoing debate over monophyly of the order and relationships among its various members, recent opinion has converged on the monophyly of a "core" group of five families classified as the suborder Grues: the rails(More)
Alternative hypotheses in higher-level marsupial systematics have different implications for marsupial origins, character evolution, and biogeography. Resolving the position of the South American monito del monte (Order Microbiotheria) is of particular importance in that alternate hypotheses posit sister-group relationships between microbiotheres and taxa(More)
Analyses of complete cytochrome b sequences from all species of cranes (Aves: Gruidae) reveal aspects of sequence evolution in the early stages of divergence. These DNA sequences are > or = 89% identical, but expected departures from random substitution are evident. Silent, third-position pyrimidine transitions are the dominant substitution type, with(More)
We report analyses of complete DNA sequences of the mitochondrial cytochrome b (1146 bp), 12S rRNA (974 bp), partial control region (371 bp) loci, and the nuclear protamine P1 (616 bp) gene from all but one species (Sminthopsis butleri) of the dasyurid marsupial tribe Sminthopsini, as well as several outgroups. Parsimony analyses of combined nuclear and(More)
We report the DNA sequences of protamine P1 genes and flanking regions from 21 mammalian species, including representatives of all extant marsupial orders. The protamine P1 locus in marsupials displays highly conserved 5' and 3' flanking sequences, as well as a highly variable intron. Marsupial protamines examined are distinct from those of eutherian(More)
The pig-footed bandicoot, Chaeropus ecaudatus, is presumed to be extinct as no specimens have been collected or seen since early this century. Usually classified as a specialized member of the family Peramelidae, there is nevertheless still some doubt as to its taxonomic affinities, because this animal is highly specialized and shows several uniquely(More)
We report sequences of the mitochondrial cytochrome b (1146 bp) and 12S rRNA (961 bp) genes, as well as the nuclear protamine P1 (608 bp) gene, from 13 species representing all four genera of the dasyurid marsupial subfamily Sminthopsinae. Mitochondrial sequences are partitioned into five categories (three codon positions in cytochrome b, and stems and(More)
The phylogenetic position of the recently extinct marsupial 'wolf', or thylacine (Thylacinus cynocephalus), has been a source of contention in mammalian systematics for nearly a century. Thylacines were endemic to Australasia, but possessed striking anatomical similarities to Oligo-Miocene borhyaenid marsupials of South America. At issue has been whether(More)
Although modern morphological and molecular analyses support the monophyly of the Australasian marsupial order Dasyuromorphia, there is much less certainty about relationships among its constituent families (Dasyuridae, Myrmecobiidae, and Thylacinidae). While most authors regard Dasyuridae as monophyletic, a few have suggested that thylacines, numbats, or(More)