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Polycladium
Classification
Phylum:
Porifera
Class:
Heteractinida
Order:
Heteractinida - Order and Family Uncertain
Formal Genus Name and Reference:
Polycladium Qian & XIAO, 1984, p. 71
Type Species:
*P. yurtusensis, OD
Images
(Click to enlarge in a new window)
Fig. 382, 1. * P. yurtusensis, Meishucuan, Yurtus Formation, isolated spicule with seven reflexed rays and central axis showing through in poorly preserved, central region, X100 (Qian & Xiao, 1984).
Synonyms
Geographic Distribution
China (Xinjiang)
Age Range
Beginning Stage in Treatise Usage:
lower Lower Cambrian
Beginning International Stage:
Fortunian
Fraction Up In Beginning Stage:
0
Beginning Date:
538.8
Ending Stage in Treatise Usage:
lower Lower Cambrian
Ending International Stage:
Cambrian Stage 2
Fraction Up In Ending Stage:
100
Ending Date:
521
Description
Small spicules with radial symmetry consisting of central axis, round central disc, and five to seven radiating rays, central axis joining central disc in center, rays abut central disc on upper side, outer surface smooth. [Genus is based on isolated spicules that may belong to chancelloriids and thus are probably not sponges.]
References
Museum or Author Information
Classification
Phylum:
Porifera
Class:
Heteractinida
Order:
Heteractinida - Order and Family Uncertain
Formal Genus Name and Reference:
Polycladium Qian & XIAO, 1984, p. 71
Type Species:
*P. yurtusensis, OD
Images
(Click to enlarge in a new window)
Fig. 382, 1. * P. yurtusensis, Meishucuan, Yurtus Formation, isolated spicule with seven reflexed rays and central axis showing through in poorly preserved, central region, X100 (Qian & Xiao, 1984).
Synonyms
Geographic Distribution
China (Xinjiang)
Age Range
Beginning Stage in Treatise Usage:
lower Lower Cambrian
Beginning International Stage:
Fortunian
Fraction Up In Beginning Stage:
0
Beginning Date:
538.8
Ending Stage in Treatise Usage:
lower Lower Cambrian
Ending International Stage:
Cambrian Stage 2
Fraction Up In Ending Stage:
100
Ending Date:
521
Description
Small spicules with radial symmetry consisting of central axis, round central disc, and five to seven radiating rays, central axis joining central disc in center, rays abut central disc on upper side, outer surface smooth. [Genus is based on isolated spicules that may belong to chancelloriids and thus are probably not sponges.]