Carringtonia cf. carringtoniana ( Davidson, 1862 a)

Carniti, Alessandro P., Porta, Giovanna Della, Banks, Vanessa J., Stephenson, Michael H. & Angiolini, Lucia, 2022, Brachiopod fauna from uppermost Visean (Mississippian) mud mounds in Derbyshire, UK, Acta Palaeontologica Polonica 67 (4), pp. 865-915 : 886

Carringtonia cf. carringtoniana ( Davidson, 1862 a)

Fig. 9N .

Material.—Two dorsal valves: MPUM11906 (RCC2-51); MPUM11907 (RCC1-11) from mud mound complex of Ricklow Quarry, Monyash, Derbyshire, UK, Monsal Dale Limestone Formation, Brigantian, upper Visean.

Description.—Small concave dorsal valve. Convex geniculation, short trail. Dorsal valve covered by rounded rugae with wide rounded interspaces, eight per 5.0 mm length posteriorly, more prominent and scattered anteriorly. Trail with low, broad costae, 1.5 mm wide. Subcircular dimples scattered over visceral disc and trail, closely packed, aligned in rugae interspaces anteriorly.

Remarks.—The specimens are close to C. carringtoniana in their rugate ornamentation density ( Brunton and Mundy 1986).

Figures

Fig. 9. Productellidae and Productidae from the Brigantian (uppermost Visean) of Ricklow Quarry, near Monyash, Derbyshire, UK (localities RCC-, RCK-; see Fig. 3). A–E. Krotovia spinulosa (Sowerby, 1814). A. MPUM11886 (RCC73-22a) in ventral view. B. MPUM11889 (RCC3-18) dorsal valve interior and external cast. C. MPUM11891 (RCK15-16) interior and external cast. D. MPUM11892 (RCK15-28) dorsal valve interior and external cast. E. MPUM11887 (RCK15-10) in ventral view. F–K. Breileenia radiata Brunton in Brunton and Lazarev, 1997. F. MPUM11895 (RCC65-1) in anterior (F1), ventral (F2), and lateral (F3) views. G. MPUM11898 (RCC12-1) dorsal valve external cast. H. MPUM11899 (RCC12-7) dorsal valve interior and external cast. I. MPUM11900 (RCC12-15) dorsal valve external cast. J. MPUM11903 (RCC38A-2) fragment in anterior view. K. MPUM11901 (RCC12-23b) dorsal valve external cast. L. Geniculifera keyserlingiana (De Koninck, 1843), MPUM11905 (RCC73-28) in antero-ventral (L1), lateral (L2), and dorsal (L3) views. M. Limbifera sp., MPUM11890 (RCC54-10b), ventral valve in ventral view. N. Carringtonia cf. carringtoniana (Davidson, 1862a), MPUM11906 (RCC2-51) dorsal valve interior and external cast. O. Productus sp., MPUM11908 (RCC1-61b) in ventral view. P. Productus sp., MPUM11909 (RCC60-6) dorsal valve external cast.