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10 LIVROS EM INGLÊS RELACIONADOS COM «PSILOPHYTIC»
Descubra o uso de
psilophytic na seguinte seleção bibliográfica. Livros relacionados com
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1
Geological Survey Professional Paper
Specimens of Mapleton Sandstone bearing spiny psilophytic remains were
collected by Richard S. Naylor in the vicinity of Presque Isle in northern Maine
and referred to me in February 1961 for paleo- botanical study and age
determination.
Hence it is clear enough that the Silurian-Devonian psilophytic or psilophytoid
types cannot be regarded as true ancestral types of any recognized pteridophytic
type. Most likely the same may be presumed also as regards the origin of the ...
not sufficiently continuous to be fully convincing. Gupta (1969) reported
Psilophyton princeps. Maithy (1974) doubted the psilophytic affinities of these
fossils due to lack of criterion by which the fossils may indisputably be recognised
as land ...
4
Doklady of the Academy of Sciences of the U.S.S.R.: Earth ...
According to O. I. Sergun'- :ova, the actual Uchkulach suite (originally :alled
arenaceous to argillitic, then psilophytic) :onsists of thin-bedded, argillaceous
and arena- :eous dolomites alternating with silty mudstones, irgillaceous
dolomitic ...
5
The natural systematic of plants in the light of the present ...
... in general several of their chief morphological and anatomical particu_ larities.
I doubt very much, whether we are really in possession of any fossil remains of
true ancestral, primitive psilophytic types. As already emphazised, I cannot agree
...
6
Botany For Degree Pteridophyta
The transmigrants evolved from these algal stocks were believed to have passed
through a 'primitive psilophytic stage' and had developed vascular elements quite
independently. In his phyletic scheme illustrating the origin of vascular land ...
7
Lexicon of Antarctic Stratigraphic Names Introduced by ...
Evidence for age "The dark carbonaceous and somewhat silty shales of the
Horlick Formation contain primitive psilophytic plants and a characteristic early
Devonian spore assemblage, according to J. M. Schopf (personal communication
).
Warren Wegner, Campbell Craddock, 1972
8
Botany For Degree Gymnosperm (M.E.)
... (ii) the Occurrence of internal Secondary Progymnosperms which, in turn, may
have Wood in Cycadoxylon robustum (= Lyginodendron evolved directly from
some psilophytic gI'OUP- robustum), and (iii) the occurrence of internal
Namboodiri ...
P C Vashishta, A K Sinha, Anil Kumar, P.C.Vasishta
we have something different in the way of a fructification to anything known
among Carboniferous plants. On the other hand, that of the Psilophytic genus
Broggeria (Fig. 17, p. 35) has at least some superficial resemblance to that of ...
10
ADVANCES IN BOTANICAL RESEARCH APL
The earlier Devonian floras were predominantly psilophytic, but there were many
associated genera of which the systematic positions are still the source of much
controversy. The flora of the Upper Devonian is in distinct contrast with those of ...
Reginald Dawson Preston, 1963
