Scalpellum

Carriol, René-Pierre, 2013, Two new species of scalpelliform barnacles (Cirripedia: Thoracica) from the Plio-Pleistocene of Cotentin, northwest France, Zootaxa 3641 (1), pp. 21-30 : 24

Scalpellum sp. B

Fig. 2 L

Material examined. Inventory, see Appendix 2

Measurements. MNHN.F.A46424: apex to middle of basal margin 1.3 mm

Description. Upper lateral pentagonal, width exceeding height, umbo removed from apex, scutal and tergal margins forming angle of about 90°. Tergal margin straight, shorter than concave scutal margin. Basal margin convex. One ridge extending from umbo to apex; two ridges extending one to each lateral angle; two ridges extending downwards from umbo.

Figures

FIGURE 2. A – J, Arcoscalpellum concavitectum sp. nov. A: paratype MNHN. F. A 45795, external side of right scutum; B: paratype MNHN. F. A 45796, internal side of left scutum; C: paratype MNHN. F. A 45794, internal side of left tergum; D: paratype MNHN. F. A 45793, external side of right tergum; E: paratype MNHN. F. A 45797, external side of right upper lateral; F: paratype MNHN. F. A 45798, internal side of left upper lateral; G 1 – 2: holotype MNHN. F. A 45791, external side of carina; H: paratype MNHN. F. A 45792, transverse section of carina; I: paratype MNHN. F. A 46422, external side of carina; J 1 – 2: paratype MNHN. F. A 46425, external and internal sides of left rostral lateral. K, Scalpellum sp. A, MNHN. F. A 46423, external side of right? upper lateral. L, Scalpellum sp. B, MNHN. F. A 46424, external side of left? upper lateral. Scale bars represent 1 mm.