KSIĄŻKI POWIĄZANE ZE SŁOWEM «POLYACTINAL»
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1
University of Kansas Paleontological Contributions: Papers
If microscleric calthrops and triactins are also claimed to be end-forms, they must
have been derived independently from polyactinal euasters in the Ancorinida,
and from spirasters, amphi- asters, or both in the Poecillastrida. Further unknown
...
2
Contributions to the knowledge of post-Palaeozoic neritic ...
As I have already maintained above, a distinction of polyactinal euasters (in
Astrophorida, Tethyidae, Chondrillidae, and Hemiasterelli- dae) from "
pseudoeuasters" passing into spinispirae (in the Timeidae and Spirastrellidae) is
unrealistic.
3
Palaeontology of invertebrates
There are also pentactinal (five), hexactinal (six) and octactinal (eight) types, and
even polyactinal spicules with more than eight rays. Living forms may be
subdivided into two groups by the morphology of the terminal ends of their
microscleres.
4
Geological Survey Bulletin
New polyactinal sponge from the Ordovician Pogonip Group, Toquima Range,
Nevada [abs.]: Geol. Soc. America Spec. Paper 101, p. 330-331, 1968. 1 0255
Rigby, J. Keith. Sponge fauna of the Maquoketa Formation of Minnesota and
Iowa ...
5
Treatise on Invertebrate Paleontology
Order HETERACTINIDA Hinde, 1888 Main skeletal framework composed of
polyactinal spicules. L.Cam.-Carb. No other sponges have many-rayed (astrose)
siliceous spicules classifiable as megascleres, that is, composing the main body
...
Raymond Cecil Moore, 1953
6
Index of the Journal of Paleontology
New polyactinal sponge from the Antelope Valley Formation (Ordovician) in the
Toquima Range, Nevada, J. Keith Rigby; 41, 511 (1967). New polycotylid
plesiosaur from the Lake Waco Formation (Cenomanian) of Texas, John T.
Thurmond; ...
7
The Transformation of the Roman World AD 400-900
... religion because of Christ's sacrifice upon it, is presented in various forms in
the decoration of the early Christian tombs: Greek, Latin, Maltese or polyactinal,
ornamented with leafy tendrils at the base, or flanked by birds, plants and flowers.
Leslie Webster, Michelle Brown, 1997
A new polyactinal sponge from the Antelope Valley formation (Ordovician) in the
Toquima Range, Nevada: Jour. Paleontology, v. 41, no. 2, p. 511-515, 1967.
1153. New polyactinal sponge from the Ordovician Pogonip Group, Toquima
Range, ...
9
Treatise on Invertebrate Paleontology
... or is greater than one third the length of the rays). In specialized sterrasters,
restricted to the choristid Geodiidae, a highly polyactinal initial oxyaster solidifies
from the center outward, until the rays are marked only by fine surface
granulation.
10
Papers from the Tortugas Laboratory of the Carnegie ...
In addition to these spiny polyactinal spicules, there are present smooth principal
spicules that are either monactinal or diactinal. This family is represented in the
West Indies by the type species of the type genus Cyamon. CYAMON Gray In this
...
Carnegie Institution of Washington. Tortugas Laboratory, Carnegie Institution of Washington. Dept. of Marine Biology, 1936
