- The
Siegenian was an
epoch of the
Devonian period spanning from 411.2 +/- 2.8 To 407 +/- 2.8 Ma. The term
overlaps with
parts of the
internationally recognised...
- a
genus of
extinct vascular plants of the
Early Devonian (Pragian or
Siegenian,
around 410 million
years ago). The
genus was
first described in 1985...
-
minutus from
Lochkovian of
Spitsbergen in Norway, and X.
grandis from
Siegenian of Spitsbergen. X.
grandis was the
largest acanthodian with 35 cm (14 in)...
- a
genus of
extinct vascular plants of the
Early Devonian (Pragian or
Siegenian,
around 410 million
years ago). The
genus was
first described in 1989...
- Chuchle, Prague. In
North America the
Pragian Stage is
represented by
Siegenian or
Deerparkian time. The
first ammonoids (order Agoniatitida) appeared...
-
genus of
extinct vascular plants from the
Early Devonian (Pragian or
Siegenian stage,
around 411 to 408
million years ago). It was
first described from...
- "Catenalis digitata, gen. & sp. nov. a
plant from the
Lower Devonian (
Siegenian) of Yunnan, China", Can. J. Bot., 69 (4): 873–882, doi:10.1139/b91-113...
-
Patricia G. (1995), "A New
Genus and Species,
Celatheca beckii, from the
Siegenian (Early Devonian) of
Southeastern Yunnan, China",
International Journal...
- Press. (Subscription or parti****ting
institution membership required.) "
Siegenian".
Oxford English Dictionary (Online ed.).
Oxford University Press. (Subscription...
-
including a
large specimen with the
right eye
preserved from the
uppermost Siegenian and a
small and
likely juvenile specimen,
confirmed the high
visual acuity...
