origin of angiosperms

Wed Dec 10 12:23:35 CST 1997

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Dear All,

In an attempt to reconstruct the historical biogeography of an insect =
group associated with angiosperms, I came across the topic of angiosperm =
origination. Apparently it has been generally accepted that the =
flowering plants have originated in the Early Cretaceous (Crane et al. =
1995). They first appeared in low latitude and only subsequently =
migrated to the middle to high latitude of both hemispheres (Hickey and =
Doyle 1977,Crane and Lidgard 1989). However, a new fossil species of =
Juglandaceae, Pterocarya sinoptera Kuang has been described from =
***Middle Jurassic*** and it is from ***Northeast China*** (Kuang, 1996, =
Rheedea 6(1): 141-151).=20

My question here, maybe a naive one from a none botanist,  is=20

How the paleobotanist community interprete the new discovery and =
'incorporate' it in the general framework of the accepted angiosperm =
origination scenario.=20

By the way, I have not seen the Kuang (1996) paper. If some of you have =
access to Rheedea, I would gratefully appreciate it if you could make a =
copy for me.

Best regards

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Zhiwei Liu
Department of Entomology
Swedish University of Agricultural Sciences
Box 7044, 750 07 Uppsala, SWEDEN
Tel# +46 18 672874, Fax# +46 18 672890
E-Mail: liu.zhiwei at entom.slu.se
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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<DIV><FONT color=3D#000000>Dear All,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT color=3D#000000>In an attempt to reconstruct the historical=20
biogeography of an insect group associated with angiosperms, I came =
across the=20
topic of angiosperm origination. Apparently it has been generally =
accepted that=20
the flowering plants have originated in the Early Cretaceous (Crane et =
al.=20
1995). They first appeared in low latitude and only subsequently =
migrated to the=20
middle to high latitude of both hemispheres (<FONT =
face=3DNewCenturySchlbk>Hickey=20
and Doyle 1977,</FONT>Crane and Lidgard 1989). However, a new fossil =
species of=20
Juglandaceae, Pterocarya sinoptera Kuang has been described from =
***Middle=20
Jurassic*** and it is from ***Northeast China*** (Kuang, 1996, Rheedea =
6(1):=20
141-151). </FONT></DIV>
<DIV><FONT color=3D#000000></FONT> </DIV>
<DIV><FONT color=3D#000000>My question here, maybe a naive one from a =
none=20
botanist,  is </FONT></DIV>
<DIV><FONT color=3D#000000></FONT> </DIV>
<DIV><FONT color=3D#000000>How the paleobotanist community interprete =
the new=20
discovery and 'incorporate' it in the general framework of the accepted=20
angiosperm origination scenario. </FONT></DIV>
<DIV><FONT color=3D#000000></FONT> </DIV>
<DIV><FONT color=3D#000000>By the way, I have not seen the Kuang (1996) =
paper. If=20
some of you have access to Rheedea, I would gratefully appreciate it if =
you=20
could make a copy for me.</FONT></DIV>
<DIV><FONT color=3D#000000></FONT> </DIV>
<DIV><FONT color=3D#000000>Best regards</FONT></DIV>
<DIV><FONT color=3D#000000></FONT> </DIV>
<DIV><FONT =
color=3D#000000>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<BR>Zhiwei=20
Liu<BR>Department of Entomology<BR>Swedish University of Agricultural=20
Sciences<BR>Box 7044, 750 07 Uppsala, SWEDEN<BR>Tel# +46 18 672874, Fax# =
+46 18=20
672890<BR>E-Mail: <A=20
href=3D"mailto:liu.zhiwei at entom.slu.se">liu.zhiwei at entom.slu.se</A><BR>~~=
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</FONT> </DIV></BODY></HTML>

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