Chancelloria sp.

Skovsted, Christian B. & Peel, John S., 2007, Small shelly fossils from the argillaceous facies of the Lower Cambrian Forteau Formation of western Newfoundland, Acta Palaeontologica Polonica 52 (4), pp. 729-748 : 741

Chancelloria sp.

Fig. 6A, B .

Type species: Chancelloria eros Walcott, 1920 .

Material.—NFM−707, NFM−708, and about 100 additional sclerites and isolated rays from samples ICS 1421, ICS 1518, ICS 1519, and JSP1982−01.

Discussion.—Small sclerites with one straight central ray and five to six slender marginal rays (5−6+1) that curve gently away from the basal facet. The basal facet has tightly set and relatively small foramina. All specimens are internal moulds; no specific assignment is possible, although the generalised morphology agrees well with sclerites of Chancelloria Walcott, 1920 .

Figures

Fig. 6. Problematic taxa from the Lower Cambrian, Forteau Formation (Western Newfoundland). A, B. Chancelloria sp. A. Phosphatic internal mould, NFM−707; B. Phosphatic internal mould viewed from basal facet, NFM−708. C, D. Archiasterella sp. C. NFM−709 from ICS 1421, phosphatic internal mould; C1, lateral view; C2, viewed from basal facet. D. NFM−710, oblique view of phosphatic internal mould. E, F. Hyolithellus sp. E. NFM−711. F. NFM−712. G. Lapworthella shodakensis (Lochman, 1956). NFM−713, dorso−ventrally flattened sclerite; in lateral (G1) and dorsal (G2) views. All specimens from JSP 1982−01 unless otherwise stated. Scale bars 200 ̊m.