Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Christopher A, Sheil"'
Publikováno v:
Vysshee Obrazovanie v Rossii = Higher Education in Russia. 28:118-127
The article discusses the importance of scientific illustration, particularly in biological research. The authors dwell on the quality criteria for scientific illustration, highlight the peculiarities of drawing microscopic objects, and give practica
Publikováno v:
Journal of Morphology. 278:1739-1753
Patterns of ossification and chondrification are well-described for several species of turtles, but details of the chondrocranial anatomy are known for only a handful of species. Cleared and double-stained embryos of Graptemys pseudogeographica were
Autor:
Markéta Bohunická, Esther Berrendero Gómez, Nicole Pietrasiak, Sergei Shalygin, Jan Mareš, Jeffrey R. Johansen, Regina R. Shalygina, Christopher A. Sheil
Publikováno v:
Journal of Phycology. 53:762-777
Two populations of Rivularia-like cyanobacteria were isolated from ecologically distinct and biogeographically distant sites. One population was from an unpolluted stream in the Kola Peninsula of Russia, whereas the other was from a wet wall in the G
Autor:
Christopher A, Sheil
Publikováno v:
Journal of morphology. 240(1)
Despite the abundance and diversity of neobatrachians, relatively few descriptions exist of their ontogenesis and skeletal development. Herein, the adult and larval skeleton and the ontogenesis of the skeleton of the African frog, Pyxicephalus adsper
Publikováno v:
Fottea. 14:161-178
The analysis of the phylogenetic signal in the sequence of the 16S rRNA gene in cyanobacteria and bacteria has been primarily limited to use of unweighted primary sequence in various cladistic analyses. Such analyses ignore the significance of second
Publikováno v:
Evolution & Development. 16:292-305
SUMMARY The evolutionary origin of Lissamphibia likely involved heterochrony, as demonstrated by the biphasic lifestyles of most extant orders, differences between Anura (with tadpole-to-froglet metamorphosis) and Urodela (which lack strongly defined
Publikováno v:
Evolution & Development. 15:344-364
SUMMARY Heterochrony is an important mechanism in the evolution of amphibians. Although studies have centered on the relationship between size and shape and the rates of development, ossification sequence heterochrony also may have been important. Ri
Autor:
Christopher A. Sheil
Publikováno v:
Journal of Morphology. 274:1124-1142
The embryonic development of the cranium of the Hawksbill Seaturtle (Eretmochelys imbricata) is described on the basis of cleared and double-stained specimens. Illustrations and descriptions of the chondrocranium at Stage 25 form the basis of compari
Publikováno v:
Acta Zoologica. 95:358-366
This study describes the anatomy of the chondrocranium of Podocnemis unifilis (Pleurodira, Podocnemididae), based on recently hatched specimens, and cleared and double-stained specimens. The orbitotemporal region is dramatically different from those
Autor:
Carlos Alberto Gonçalves Cruz, Délio Baêta, Reuber Albuquerque Brandão, Christopher A. Sheil, Guilherme F. R. Alvares, Karl-Heinz Jungfer, Célio F. B. Haddad, Lucas S. Barrientos, Julián Faivovich, Ward C. Wheeler, César L. Barrio-Amorós
Publikováno v:
Cladistics. 26:227-261
The leaf or monkey frogs of the hylid subfamily Phyllomedusinae are a unique group of charismatic anurans. We present a molecular phylogenetic analysis that includes 45 of the 60 species of phyllomedusines using up to 12 genes and intervening tRNAs.