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・ Palaeopagurus
・ Palaeopascichnus
・ Palaeoperca
・ Palaeopercichthys
・ Palaeoperenethis
・ Palaeophanes
・ Palaeophanes brevispina
・ Palaeophanes lativalva
・ Palaeophanes taiwanensis
・ Palaeophanes xoutha
・ Palaeophichthys
・ Palaeophiidae
・ Palaeophilotes
・ Palaeophis
・ Palaeophonus
Palaeophragmodictya
・ Palaeophyllites
・ Palaeopleurodeles
・ Palaeopleurosaurus
・ Palaeoplusia
・ Palaeopolis, Lydia
・ Palaeopomacentrus
・ Palaeopropithecus
・ Palaeoproteus
・ Palaeopsyche
・ Palaeoptera
・ Palaeopteryx
・ Palaeopython
・ Palaeoraphe
・ Palaeorhincodon


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Palaeophragmodictya : ウィキペディア英語版
Palaeophragmodictya

''Palaeophragmodictya'' is a Precambrian sponge-grade organism from the Ediacaran Period.
Originally interpreted as a hexactinellid sponge,〔
〕 the organism also bears some coelomate characteristics, including bilateral symmetry.
==Morphology==
The organisms take the form of a round bag, 7–68 mm in diameter, with an uneven margin. Radial grooves define sac-like compartments within the bag. The radial pattern has an element of bilateral symmetry. A stalk emerges from the central point of some specimens, at the top of the organism; in life, it probably extended into the water column. Ray-like filaments radiate outwards from the edge of the bag.〔 Some structures in the organism have been interpreted as spicules.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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