Setatella significans Skovsted, Streng, Knight, and Holmer, 2010

Skovsted, C. B., Knight, I., Balthasar, U. & Boyce, W. D., 2017, Depth related brachiopod faunas from the lower Cambrian Forteau Formation of southern Labrador and western Newfoundland, Canada, Palaeontologia Electronica (Oxford, England: 1990) 17 (15), pp. 1-52 : 45

Setatella significans Skovsted, Streng, Knight, and Holmer, 2010

Figure 24

*2010 Setatella significans Skovsted, Streng, Knight, and Holmer , p. 119, figures 2-3 (includes synonymy to date).

Material. Four ventral and one dorsal valve as well as 14 shell fragments from the Forteau Formation of southern Labrador and western Newfoundland ( LLQ 3-5, LLQ 3-7, LLQ 3-9, BER-5-8, BER-5-9, R 432-5-1, R 432-5-2, GM07-1-1, and GM11-1-5s).

Diagnosis. See Skovsted, Streng, Knight, and Holmer, 2010 (p. 120).

Remarks. Setatella significans from North-East Greenland and Labrador is a probable member of the stem group of subphylum Linguliformea ( Skovsted and Holmer, 2003; Skovsted et al., 2010). The species was recently redescribed (Skovsted et al., 2010), partly based on material from the Forteau Formation of southern Labrador. The present investigation has revealed rare new specimens of the species also from western Newfoundland (Assemblage 2; west of the Long Range Mountains), but the new material reveal no new information on the morphology or microstructure of this problematic taxon.

Distribution. Basal Devils Cove member of the Bonne Bay area, western Newfoundland, and Upper limestone of southern Labrador and western Newfoundland (Assemblage 2). Cambrian Series 2, Stage 4 of North-East Greenland and possibly New York State.

Figures

FIGURE 24. Setatella significans Skovsted, Streng, Knight and Holmer, 2010 from the Forteau Formation, The upper biostrome, L’anse au Loupe, southern Labrador. 1-2, Ventral valve NFM F-792 sample LLQ3-7; 1, internal view of posterior margin; 2, posterior view showing pseudointerarea. 3-4, Ventral valve NFM F-790, sample LLQ3-9; 3, internal view; 4, oblique lateral view. 5, Ventral valve NFM F-789, sample LLQ3-7, external view. 6, Shell fragment NFM F- 793, sample LLQ3-9. All scalebar equals 250 µm.