P. Dumitrica et al., Archaeospicularia, new Radiolarian order; a new step for the classification of the Lower Paleozoic Radiolaria., CR AC S IIA, 330(8), 2000, pp. 563-569
Citations number
12
Categorie Soggetti
Earth Sciences
Journal title
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DELA TERRE ET DES PLANETES
A new radiolarian order - Archaeospicularia - is proposed for some Lower Pa
leozoic radiolarians previously considered to belong to Spumellaria and to
Collodaria. It is characterized by a globular shell made of several spicule
s which can be free, interlocked, or fused to formed a latticed wall. The p
resent paper gives the definition of this order and proposes a first classi
fication. It is supposed that the Archaeospicularia represents the oldest r
adiolarian group and that in the Lower Paleozoic it gave rise to the orders
Entactinaria, Albaillellaria, and probably Spumellaria by the reduction of
the number of initial spicules. The origin of this order and its relations
hips with other groups of organisms with siliceous skeletons are also brief
ly discussed. (C) 2000 Academie des sciences / Editions scientifiques et me
dicales Elsevier SAS.