Archiasterella sp.

Clausen, Sébastien & Álvaro, J. Javier, 2006, Skeletonized microfossils from the Lower-Middle Cambrian transition of the Cantabrian Mountains, northern Spain, Acta Palaeontologica Polonica 51 (2), pp. 223-238 : 228

Archiasterella sp.

Fig. 3K, L.

Material.— Twelve specimens preserved as phosphatized sclerites or phosphatic steinkerns in the Middle Cambrian “Beleño” facies, section Cr 4.

Description.—5+0 sclerites having one median recurved ray (up to 200 µm long), and four lateral rays (up to 300 µm long), all incompletely preserved.

Remarks.—Among Archiasterella species, 5+0 sclerites occur in A. pentactina Sdzuy, 1969 (with 2+0 and 5+0 sclerites), A. antiqua Sdzuy, 1969 (with 2+0 and 4–7+0 sclerites), and A. robusta Vasilieva, 1986 (with 5+0 sclerites). The latter, which differs only from A. pentactina in the robust character of its axis, may be considered as a junior synonym of this species. The incomplete preservation of the Cantabrian sclerite rays prevents a definite assignment to any species.