Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica

Figures & data

Figure 1. Location and stratigraphy of Seymour Island, Antarctica (A) map of Antarctica, showing the position of the Antarctic Peninsula; (B) map of the Antarctic Peninsula, showing the location of Seymour Island; (C) Geological map of Seymour Island, showing the outcrop of TELMs 5–6 with the localities IAA 1/90, IAA 2/95 and IAA 1/93 of the Eocene La Meseta Formation; (D) composite measured section trough the La Meseta and Submeseta formations, showing the stratigraphical position of the sampled localities IAA 1/90, IAA 2/95 and IAA 1/93. [175 × 160 mm, planned for whole page width].

Notes: Modified from Schwarzhans et al. (2016).

Figure 2. SEM photographs of teeth of Raja manitaria sp. nov. male teeth: NRM-PZ P16271, (A), labial; (B), lingual; (C), profile; (D), occlusal; (E), basal views, NRM-PZ P16270, (F), labial; (G), lingual; (H), profile; (I), occlusal; (J), basal views, NRM-PZ P16269, (K), labial; (L), lingual; (M), profile; (N), occlusal; (O), basal views; NRM-PZ P16268, (P), labial; (Q), lingual; (R), profile; (S), occlusal; (T), basal views; NRM-PZ P16267, (U), labial; (V), lingual; (W), profile; (X), profile; (Y), basal views; female teeth: NRM-PZ P16266, (Z) labial; (AA), lingual; (BB), profile; (CC), occlusal, (DD), basal views; NRM-PZ P16265, (EE) labial; (FF), lingual; (GG), profile; (HH), occlusal; (II), basal views.

Note: Scale bar equals 1 mm.

Figure 3. SEM photographs of teeth of Raja amphitrita sp. nov. NRM-PZ P16264, (A), labial; (B), lingual; (C), profile; (D), occlusal; (E), basal views, NRM-PZ P16263, (F), labial; (G), lingual; (H), profile; (I), occlusal; (J), basal views, NRM-PZ P16262, (K), labial; (L), lingual; (M), profile; (N), occlusal; (O), basal views; NRM-PZ P16261, (P), labial; (Q), lingual; (R), profile; (S), occlusal; (T), basal views; NRM-PZ P16260, (U), labial; (V), lingual; (W), profile; (X), profile; (Y), basal views; NRM-PZ P16259, (Z) labial; (AA), lingual; (BB), profile; (CC), occlusal, (DD), basal views; NRM-PZ P16258, (EE) labial; (FF), lingual; (GG), profile; (HH), occlusal; (II), basal views.

Note: Scale bar equals 1 mm.

Figure 4. SEM photographs of teeth of Marambioraja leiostemma gen. et sp. nov., anterior teeth: NRM-PZ P16257, (A), labial; (B), lingual; (C), profile; (D), occlusal; (E), basal views, NRM-PZ P16256, (F), labial; (G), lingual; (H), profile; (I), occlusal; (J), basal views, NRM-PZ P16255, (K), labial; (L), lingual; (M), profile; (N), occlusal; (O), basal views; NRM-PZ P16254, (P), labial; (Q), lingual; (R), profile; (S), occlusal; (T), basal views; lateral to posterior teeth: NRM-PZ P16253, (U), labial; (V), lingual; (W), profile; (X), profile; (Y), basal views; NRM-PZ P16252, (Z) labial; (AA), lingual; (BB), profile; (CC), occlusal, (DD), basal views; NRM-PZ P16251, (EE) labial; (FF), lingual; (GG), profile; (HH), occlusal; (II), basal views.

Note: Scale bar equals 1 mm.

Figure 5. Reconstruction of teeth from a 3D data-set made with Drishti software of Mesetaraja maleficapelli gen. et sp. nov. NRM-PZ P16250, (A), labial; (B), lingual; (C), profile; (D), occlusal; (E), basal views.

Note: Scale bar equals 1 mm.

Figure 6. Photographs of Myliobatis sp. taken with a reflex camera, morphotype 1, NRM-PZ P16249, (A1), labial, (A2), lingual; (A3), occlusal; (A4), basal views; NRM-PZ P16248, (B1) labial, (B2), lingual; (B3), occlusal; (B4), basal views; NRM-PZ P16247, (C1) labial, (C2), lingual; (C3), occlusal; (C4), basal views; morphotype 2, NRM-PZ P16246 (D1) labial, (D2), lingual; (D3), occlusal; (D4), basal views; NRM- PZ P16245 (E1) labial, (E2), lingual; (E3), occlusal; (E4), basal views; morphotype 3, NRM-PZ P15781, (F1), labial; (F2), lingual; (F3), occlusal; (F4), basal views.

Note: Scale bar equals 10 mm.

Figure 7. Distribution of extinct and extant species of the genera Rhinoptera, Myliobatis and Raja. The extinct taxa are marked with symbols. (A), Geographic distribution of extant Myliobatis spp; (B), Geographic distribution of extant Rhinoptera spp.; (C), Geographic distribution of extant Bathyraja ssp.; (D), Geographic distribution of extant Raja spp.; (E), Paleogeographic distribution of fossil remains of the genera Rhinoptera, Myliobatis and Raja.

Schwarznhans W, Mörs T, Engelbrechte A, Reguero M, Kriwet J. 2016. Before the freeze: otholiths formt he Eocene of Seymour Island, Antarctca, reveal dominance of gadiform fishes (Teleostei). J Syst Palaeontol. 1–24.

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