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Fig. 6 in The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica

Fig. 6. The gaudryceratid ammonoid Anagaudryceras spp., from the Campanian (Cretaceous), Antarctica, Rabot Formation, Redonda Point locality (A–C), and from the late Campanian–early Maastrichtian (Cretaceous), Antarctica, Snow Hill Island Formation, Sanctuary Cliffs locality (D, E). A, B. Anagaudryceras calabozoi Raffi and Olivero sp. nov. A. CADIC PI 411, holotype, adult macroconch; suture line (A1), transversal section (A2). B. CADIC PI 472, adult microconch; suture line (B1), transversal section (B2). C. Anagaudryceras cf. A. politissimum (Kossmat, 1895), CADIC PI 455, transversal section. D. Anagaudryceras sanctuarium Raffi and Olivero sp. nov., CADIC PI 604, transversal section. E. Anagaudryceras subcompresum Raffi and Olivero sp. nov., CADIC PI 506, holotype, adult specimen; suture line (E1), transversal section (E2). Scale bars 10 mm. Abbreviations: E, external lobe; I, internal lobe; L, lateral lobe; U, umbilical lobe; Us, septal lobe.

Fig. 1 in The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica

Fig. 1. Location map (A) and geological sketch (B) of the James Ross Basin, Antarctica. Abbreviations: C. Lamb, Cpe Lamb; Fm., Formation; MG, Maorites and Grossouvrites Sequence; N, Natalites Sequence; NG, Neograhamites and Gunnarites Sequence; Sant., Santonian; Sst., sandstone.

Fig. 5 in The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica

Fig. 5. The gaudryceratid ammonoid Anagaudryceras, early Campanian (Upper Cretaceous) of Antarctica, from Rabot Formation, Redonda Point locality (A, B) and from Santa Marta Formation, Brandy Bay locality (C, D). A, B. Anagaudryceras cf. A. politissimum (Kossmat, 1895). A. CADIC PI 455. B. CADIC PI 454. C, D. Anagaudryceras sp. juvenile 1. C. CADIC PI 533. D. CADIC PI 534. In lateral (A1–D1) and ventral (A2–D2) views. Arrows mark the beginning of the body chamber.

Fig. 3 in The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica

Fig. 3. Biostratigraphy of Anagaudryceras in the Sanctuary Cliffs Member, Snow Hill Island Formation, Antarctica, early Maastrichtian (A) and the López de Bertodano Formation, Seymour Island, late Maastrichtian (B). Ammonite assemblages by Olivero (2012b), magnetostratigraphic correlation for the Snow Hill Island Formation by Milanese et al. (2017a, b) and for the López de Bertodano Formation by Tobin et al. (2012). Abbreviations: A., Anagaudryceras; Ass., ammonite assemblage; Fm., Formation; G, gravel; M, mud; S, sand; Sst., sandstone.

Fig. 2 in The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica

Fig. 2. Biostratigraphy of lytoceratid ammonites from the Santa Marta and Rabot formations, James Ross Island, early–mid-Campanian. Ammonite assemblages by Olivero (2012b), magnetostratigraphic correlation by Milanese et al. (2017a, b). Abbreviations: Ass., ammonite assemblage; G, gravel; I–III, informal names of the members of the Rabot Formation; M, mud; S, sand.

Fig. 3 in Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica

Fig. 3. Interpretative drawing of the strobilus fragment in Fig. 2A, showing the loose, helical arrangement of sporophylls and sporophyll scars.

Fig. 2 in Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica

Fig. 2. Pleuromeialean lycophyte reproductive structures from the Upper Triassic of the "Alfie's Elbow" site, central Transantarctic Mountains. A. Articulated fragment of a strobilus. Individual sporophylls can be recognized by the longitudinal striations on the abaxial surface (compare Fig. 2B, C; see Fig. 3). B. Isolated sporophyll, abaxial surface. C. Same sporophyll as Fig. 2B, but after manual preparation, showing globose adaxial sporangium (s) beneath the sporophyll. D, E. Sporangia. F. Cluster of megaspores. G. Megaspores showing trilete marks and curvaturae (arrows). H–J. Distal faces of megaspores showing variation in surface ornamentation or preservation, including verrucate, conate, and echinate patterns.

Fig. 5. Pleuromeialean lycophyte leaf Mesenteriophyllum serratum Sixtel, 1961 in Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica

Fig. 5. Pleuromeialean lycophyte leaf Mesenteriophyllum serratum Sixtel, 1961 from the Triassic Madygen Formation, Kyrgyz Republic. Modified from Sixtel (1961). Leaf width up to ~12 mm.

Fig. 6 in Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica

Fig. 6. Known palaeogeographic distribution of Mesenteriophyllum Sixtel, 1961 in the northern and southern hemisphere Triassic. Palaeogeography after Golonka (2007).

Fig. 4. Pleuromeialean lycophyte leaf Mesenteriophyllum serratum Sixtel, 1961 in Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica

Fig. 4. Pleuromeialean lycophyte leaf Mesenteriophyllum serratum Sixtel, 1961 from the Upper Triassic of the "Alfie's Elbow" site, central Transantarctic Mountains. A. Two overlying leaf fragments recognizable primarily by the distinct serrate appearance of the leaf margins. B. Detail of A showing serrate appearance of margins. C. Detail of leaf margin with alternating transverse ridges and furrows, and preserved cell pattern. Note longitudinal striae (s), circular holes on central leaf portion (some marked with arrows), and vertical alignment of transversely elongated epidermal cells (e) on leaf margin. D. Detail of leaf margin with cellular preservation, showing transversely elongated cells aligned in vertical rows. E. Detail of longitudinal striae on central leaf portion. F, G. Orthogonal pattern of epidermal cells in central leaf portion, visible only in places where carbonized cuticle layer is lifted off.

Fig. 1 in Macrofossil evidence for pleuromeialean lycophytes from the Triassic of Antarctica

Fig. 1. Geographic location (A–C) and lithological column (D) of the plant−bearing succession at "Alfie's Elbow"; arrow indicates the position of the bed from which the present material was collected. Lithological column after Axsmith et al. (2000).

Fig. 26. A in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 26. A. Steinkern of initial part of Stapicyathus cera Debrenne archaeocyath cup, ZPAL Ac.I/53U7, erratic Me33. B, C. Problematic?tommotiid sclerite. B. Fragment of sclerite wall, ZPAL V.VI/49U4, erratic Me66. C. Fragment of sclerite wall, ZPAL V.VI/49U3, erratic Me66; C1, general view; C2, detail showing lamellar structure at the edge (arrowed). D, E. Aetholicopalla adnata Conway Morris. D. Specimen with external wall exfoliated, ZPAL V.VI/38S6, erratic Me32. E. Specimen ZPAL V.VI/38S1, erratic Me66; E1, oblique view, showing inner wall and tubules; E2, detail of surface of inner wall.

Fig. 24. A in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 24. A. Diagrammatic cross−section of the wall of Mongolitubulus squamifer Missarzhevsky. B. Energy dispersive spectrum (EDS) for the M. squamifer sclerite. C. Broken end of the specimen figured in Fig. 23D, showing layered wall structure including outer hyaline layer and fibrous inner layer.

Fig. 22. A in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 22. A. Diagrammatic cross section of the sclerite Hadimopanella staurata sp. nov. B. Energy dispersive spectrum (EDS) for the H. staurata sclerite.

Fig. 9. A in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 9. A. Energy dispersive spectrum (EDS) for Dailyatia ajax Bischoff sclerite. B–E. Diagrammatic reconstruction of the relationship between Dailyatia sclerite element and secretory epithelium during growth, based on the multilamellar wall structure and the polygonal pattern covering the entire sclerite, except for a nipple−like termination of the apex.

Fig. 10 in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 10. Sclerite of Dailyatia sp., ZPAL V.VI/31S2, erratic Me33. A. Oblique right lateral (anterior) view of asymmetrical triangular sclerite, type C. B. Oblique apical view. C. Oblique left lateral view. D. Enlargement of ornamentation showing growth ribs.

Fig. 21 in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 21. Sclerite of Hadimopanella staurata sp. nov., ZPAL V.VI/24S24, errratic boulder Me40. A. Oblique lateral view. B. Upper view. C, D. Enlargements of B showing arrangement of phosphate crystallites in the external layer.

Fig. 20 in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 20. Holotype of Hadimopanella staurata sp. nov., ZPAL V.VI/24S3, errratic boulder Me66. A. Oblique lateral view, stereo−pair. B. Upper view. C. Enlargement showing (in a hole) arrangement of phosphate crystallites in the external sclerite layer.

Fig. 19 in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 19. Representatives of Hadimopanella staurata sp. nov. sclerites showing variability in shape and ornamentation. A. ZPAL V.VI/24S24. B. ZPAL V.VI/24S26. C. ZPAL V.VI/24S33. D. ZPAL V.VI/19S9. E. ZPAL V.VI/24S33. F. ZPAL V.VI/24S30, in oblique lateral (F1) and upper (F2) views. G. ZPAL V.VI/24S3, holotype, in oblique lateral (G1) and upper (G2) views. H. ZPAL V.VI/35S24, in oblique lateral (H1) and upper (H2) views. I. ZPAL V.VI/14S9, in oblique lateral (I1) and upper (I2) views. J. ZPAL V.VI/17S8, in oblique lateral (J1) and upper (J2) views.

Fig. 1 in Cambrian microfossils from glacial erratics of King George Island, Antarctica

Fig. 1. Location map of King George Island (arrowed) in Antarctica (B) and the outcrops of Cambrian rocks (dark shaded) on the continent referred to in the text. The occurrence of glacio−marine formations (shaded) on the island (A) and the Early Miocene Cape Melville Formation and collection site (asterisk). Abbreviations: Mts., Mountains; Ra., Range; Gl., Glacier.