As SCM et al . note in their discussion, " the phyletic position of Phragmochaeta is very poorly constrained, but it may be fairly basal ", which is what makes these early Cambrian Lagerst�tte so fascinating.
22.
To popularize and summarize the above-HG G is solidly, reasonably established and logically all but confirmed as one of the primordial phyletic co-contributors of Israelite-Judaic society and no controversy need exist conceivably.
23.
In another study concerning morphological trends and rates of evolution found that the European arvicolid rodent radiated into 52 distinct lineages over a time frame of 5 million years while documenting examples of phyletic gradualism, punctuation, and stasis.
24.
Generally, I think DNA evidence is always just one part of the puzzle, in principle . . . genes and morphology, in a broad sense, are both just traits on which to base our phyletic inferences.
25.
The concept of chronospecies is related to the phyletic gradualism model of evolution, and also relies on an extensive fossil record, since morphological changes accumulate over time and two very different organisms could be connected by a series of intermediaries.
26.
The phyletic order of species is accurate in some cases but grossly inaccurate in others; for example " B . brownii " and " B . nutans " are closely related but are placed very far apart by Brown.
27.
Both the PE and Phyletic gradualism models appear to be legitimate models for understanding historic evolutionary patterns The question of the frequency of each model is an unresolved issue and besides, looking at it as a dichotomy is usually seen as flawed anyway.
28.
With respect to " B . " ser . " Abietinae ", George's 1999 arrangement was fundamentally the same as his 1981, but differed in the ranking of some taxa, the inclusion of some newly published taxa, and changes to the phyletic order.
29.
A study of four mammalian genera : " Hyopsodus ", " Pelycodus ", " Haplomylus " ( three from the Eocene ), and " Plesiadapis " ( from the Paleocene ) found that through a large number of stratigraphic layers and specimen sampling each group exhibited, " gradual phyletic evolution, overall size increase, iterative evolution of small species, and character divergence following the origin of each new lineage ".
30.
""'Hen's Teeth and Horse's Toes " "'( 1983 ) is Stephen Jay Gould's third volume of collected essays reprinted from his monthly columns for Discover " magazine in May 1981; " Phyletic size decrease in Hershey bars " appeared in C . J . Rubins's " Junk Food ", 1980; and his " Reply to critics ", was written specifically for this volume as a commentary upon criticism of essay 16, " The Piltdown Conspiracy ".
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