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The paleobiology and phylogenetic position of Archaeopteryx
Geobios, 1982Abstract Several theories of relationships of Archaeopteryx are discussed and it is concluded that the closest relatives in the taxon Thecodontia. Based on the morphology it is suggested that the early stage in avian flight was an arboreal tetrapod and no intermediate bipedal stage was required.
Max K. Hecht, Samuel Tarsitano
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Reflections on the Phylogenetic Position of the Cephalocarida
Acta Zoologica, 1992AbstractThis essay re‐evaluates the phylogenetic position of the Cephalocarida in the light of the recently discovered Orsten (Upper Cambrian) crustaceans, the living Remipedia, and new interpretation of the Paleozoic ‘trilobitomorphs’. The Orsten crustaceans reinforce the belief that cephalocarid external morphology is primitive, except to show that ...
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The phylogenetic position of Udonella (Platyhelminthes).
International journal for parasitology, 1998Phylogenetic analysis of molecular data from complete 18S rRNA and partial 28S rRNA genes, of a variety of platyhelminths, places the enigmatic Udonella caligorum firmly as a monopisthocotylean monogenean. Both maximum parsimony and a modified distance measure, operating under a maximum likelihood model, gave identical solutions for each data set ...
D T, Littlewood, K, Rohde, K A, Clough
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THE PHYLOGENETIC POSITION OF ANEMIA COLIMENSIS
American Journal of Botany, 1967The unique leaf structure of the genus Anemia with its upright fertile basal pinnae has been interpreted as derived from the typical fern leaf with unmodified basal pinnae. Reported herein for the first time is the leaf morphology of a species, Anemia colimensis
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Phylogenetic Position of Amitochondriate Protists in the Evolution of Eukaryotes
The Biological Bulletin, 1999Mitochondria are very likely to have descended from eubacteria by endosymbiosis. Therefore, phylogenetic placement of amitochondriate protists is important in understanding the origin and early evolution of eukaryotes. That is, if some of the amitochondriate protists turn out to represent deep branchings in the eukaryotic tree, they are very likely to ...
M, Hasegawa, T, Hashimoto
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Characterizing positive and negative selection and their phylogenetic effects
Gene, 2008Total evidence and the use of large datasets to overcome uncertainty are the state of the art in systematic analysis. This assumes that the only true phylogenetic signal is ancestry and that functional, structural, and other factors will not add an alternative signal.
Steven E, Massey +3 more
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Phylogenetic position of yeastlike endosymbionts of anobiid beetles
Applied and Environmental Microbiology, 1996The Anobiid beetles Stegobium paniceum and Lasioderma serricorne possess the intracellular yeastlike symbionts Symbiotaphrina buchneri and Symbiotaphrina kochii, respectively, in the mycetome between the foregut and midgut. The nucleotide sequences of the small-subunit rRNA-encoding genes of the symbionts were determined for phylogenetic analysis. Five
H, Noda, K, Kodama
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The Phylogenetic Position of the Genus Anniella
1980The genus Anniella was first described by Gray (1852) and grouped within the Scincidae. Cope (1864) established a separate family, the Anniellidae, and placed it, together with the Anelytropsidae and Acontiidae, within his tribe Typhlophthalmi.
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The phylogenetic position of Homo cepranensis.
2004Description of features of the hominid calvaria of Homo cepranensis.
MALLEGNI F. +4 more
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