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Fig. 7 in An enigmatic new archosauriform from the Carnian- Norian, Upper Triassic, Ischigualasto Formation of northwestern Argentina

Fig. 7. Photograph of articulated series of sacral vertebrae (S1, S2) and anterior caudal vertebrae (Ca1–Ca5) of the archosauriform Incertovenator longicollum gen. et sp. nov. (PVSJ 397) from Ischigualasto Formation (Carnian–Norian), Hoyada de Ischigualasto, Argentina; in right lateral view. Arrow indicates anterior direction.

Fig. 2 in An enigmatic new archosauriform from the Carnian- Norian, Upper Triassic, Ischigualasto Formation of northwestern Argentina

Fig. 2. Photographs (A1, A2) and interpretative drawings (A3, A4) of the axis, third cervical vertebra and third cervical rib of the archosauriform Incertovenator longicollum gen. et sp. nov. (PVSJ 397) from Ischigualasto Formation (Carnian–Norian), Hoyada de Ischigualasto, Argentina; in left (A1, A3) and right A2, A4) lateral views. Arrows indicate anterior direction.

Fig. 1 in An enigmatic new archosauriform from the Carnian- Norian, Upper Triassic, Ischigualasto Formation of northwestern Argentina

Fig. 1. Geographic and stratigraphic position of the holotype specimen of Incertovenator longicollum gen. et sp. nov. (PVSJ 397). A, B. Geological map of the Ischigualasto–Villa Unión Basin. Asterisk indicates the type locality. C. Stratigraphic section of the Ischigualasto Formation. Modified from Martínez 1994.

Fig 2 in Ordovician enigmatic sclerite-type elements from western Argentina: possible oldest axial components of alcyonacean octocorals

Fig 2. Alcyonacean octocoral Catenatus argentinus gen. et sp. nov. sclerite-type elements from the Middle Ordovician (Darriwilian), Lenodus variabilis– Yangtzeplacognathus crassus zones, San Juan Formation, San Juan Province, Argentina and its chemical composition by surface EDX analysis. A. Siliceous sclerite-type element, CEGH-UNC 27474, sample LG42 (unpolished sample). B. Phosphatic sclerite-type, CEGH-UNC 27475, sample RIN34. C. Partially broken element showing a solid inner structure, CEGH-UNC 27471, sample LG42. D, E. Thin sections of isolated elements of Catenatus argentinus gen. et sp. nov., showing the internal homogeneous structure, CEGH-UNC 27472, sample LG42 (D), and CEGH-UNC 27473, sample FSJ 3º hardground (E). Scale bars 100 μm.

Fig. 1 in Ordovician enigmatic sclerite-type elements from western Argentina: possible oldest axial components of alcyonacean octocorals

Fig. 1. The geographical and geological context of the Ordovician alcyonacean octocoral Catenatus argentinus gen. et sp. nov. from the San Juan Formation, Argentina. A. Location map of the studied localities with Ordovician alcyonacean sclerite-type elements from the Argentine Precordillera, San Juan Province, Argentina (1, Oculta Creek, Sierra de Los Cauquenes; 2, Los Gatos Creek, Cerro Viejo; 3, Amarilla Creek, Cerro Viejo; 4, Punta Negra Anticline; 5, Sierra de Rinconada). B. Simplified stratigraphic column of the San Juan Formation in the Argentine Precordillera, with location of the productive samples.

Fig. 3 in A new buzzard from the late Pliocene of Argentina

Fig. 3. Partial left pes of the buzzard Buteo dondasi sp. nov. (MMP 5730) from Chapadmalal Formation (late Pliocene), La Estafeta Beach, Mar del Plata, Argentina. A. Left os metatarsale I in dorsal (A1) and distal (A2) views. B. First phalanx of toe I, in lateral (B1), dorsal (B2), medial (B3), ventral (B4), proximal (B5), and distal (B6), views. C. Ungual phalanx of toe I, in proximal (C1), dorsal (C2), medial (C3), and ventral (C4) views. D. First phalanx of toe II, in proximal (D1), lateral (D2), dorsal (D3), medial (D4), ventral (D5), and distal (D6) views. E. Second phalanx of toe II in medial (E1), dorsal (E2), lateral (E3), ventral (E4), proximal (E5), and distal (E6) views. F. Ungual phalanx of toe II, in proximal (F1), dorsal (F2), medial (F3), and ventral (F4) views.

Fig. 2 in A new buzzard from the late Pliocene of Argentina

Fig. 2. Left tarsometatarsus of the buzzard Buteo dondasi sp. nov. (MMP 5730) from Chapadmalal Formation (late Pliocene), La Estafeta Beach, Mar del Plata, Argentina; in dorsal (A1), lateral (A2), ventral (A3), medial (A4), proximal (A5), and distal (A6) views.

Fig. 5 in A new Late Triassic dipteridacean fern from the Paso Flores Formation, Neuquén Basin, Argentina

Fig. 5. Drawing of the dipteridacean fern Patagoniapteris artabeae gen. and sp. nov. from the upper Norian–Rhaetian, Upper Triassic Paso Flores Formation, Neuquén Province, Argentina. A. MCF-PBPH 066, basal portion of a rachial arm with the primary segments fused lamina. B. MCF-PBPH 415, primary segments of fertile frond with deeply dissected lobes. C. Hypothetical reconstruction of the frond.

Fig. 2 in A new Late Triassic dipteridacean fern from the Paso Flores Formation, Neuquén Basin, Argentina

Fig. 2. Location of the study area within Argentina and southern region of the Neuquén Province and north-western region of the Río Negro Province (B, C). Aerial view of the study area showing the main outcropping sections of the Paso Flores Formation (A) (based on Spalletti et al. 1988 and González Díaz 1982). The star indicates the location of the studied fossil flora at Cañadón de Pancho described herein. Image taken from Google Earth (2016).

Fig. 7 in A new Late Triassic dipteridacean fern from the Paso Flores Formation, Neuquén Basin, Argentina

Fig. 7. Dipteridacean fern Patagoniapteris artabeae gen. and sp. nov. from the upper Norian–Rhaetian, Upper Triassic Paso Flores Formation, Neuquén Province, Argentina. A. MCF-PBPH 066, view of the sori. A1–A5, details of the sori with and without sporangia (arrow). Scale bars 1.5 mm.

Fig. 1 in A new Late Triassic dipteridacean fern from the Paso Flores Formation, Neuquén Basin, Argentina

Fig. 1. Generalized outline of the Neuquén Basin, showing the location of the studied area of the Paso Flores Formation, Neuquén Province, Patagonia, Argentina (modified from Vergani et al. 1995). Image taken by NASA, July 2004.

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Fig. 3 in Exceptional preservation of tracheal rings in a glyptodont mammal from the Late Pleistocene of Argentina

Fig. 3. Cartilages present in the neck of glyptodont mammal Panochthus sp. compared with Recent California sea lion and domestic pig. A. Thyroid, cricoid, and tracheal cartilages in ventral view; generalized mammal (A 1), Panochthus sp. (A 2). B. Explanatory drawing of the Panochthus sp. skull in lateral view, with hyoid apparatus and tracheal rings. C–E. Tracheal rings in anterior view. C. Panochthus sp. (MHM-P 87). D. California sea lion Zalophus californianus Lesson, 1828. E. Domestic pig Sus scrofa domestica Linnaeus, 1758. A, modified from Martínez and Turpín 2015; D, E, modified from Moore et al. 2014. Abbreviations: cc, cricoid cartilage; hy, hyoid apparatus; mr, mandibular rami; sk, skull; tc, thyroid cartilage; tr, tracheal rings.

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Fig. 2 in Exceptional preservation of tracheal rings in a glyptodont mammal from the Late Pleistocene of Argentina

Fig. 2. Tracheal cartilages of glyptodont mammal Panochthus sp. (MHM-P 87) from the Late Pleistocene of General Belgrano, Argentina, in ventral views. Lateral (A1), ventral and ventro-lateral (A2) portions, fragment of cricoid cartilage (A3) in ventral views.

Fig. 2 in Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina

Fig. 2. Femur of archosauromorph Lagerpeton chanarensis Romer, 1971 (PULR-V 124, in lambda light) from La Rioja province, NW Argentina; Chañares Formation, Carnian (Late Triassic). Section showing the inner circumferential layer and the cortex (A1), detail of the compact coarse cancellous bone (A2), oblique section of the same femur (A3). Abbreviations: CCCB, Compact Coarse Cancellous Bone; ICL, Inner Circumferential Layer. Scale bars 300 μm.

Fig. 3 in Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina

Fig. 3. Femur of archosauromorph Lagerpeton chanarensis Romer, 1971 (PVL-4625, in polarized light) from La Rioja province, NW Argentina; Chañares Formation, Carnian (Late Triassic). Section showing the inner circumferential layer and the cortex (A1), detail of the compact coarse cancellous bone (A2). Abbreviations: CCCB, Compact Coarse Cancellous Bone; ICL, Inner Circumferential Layer. Scale bars 300 μm.

Fig. 4 in Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina

Fig. 4. Tibia of archosauromorph Lagerpeton chanarensis Romer, 1971 PVL-4625, in lambda light) from La Rioja province, NW Argentina; Chañares Formation, Carnian (Late Triassic). Section showing the main features of the tibia bone microstructure. Abbreviations: ICL, Inner Circumferential Layer; LAG, line of arrestred growth.

Fig. 1 in Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina

Fig. 1. Long bones of archosauromorphs from La Rioja province, NW Argentina; Chañares Formation, Carnian (Late Triassic). A, B. Lagerpeton chanarensis Romer, 1971 (PVL-4625) femur in posteromedial view (A) and tibia in lateral view (B). C. Chanaresuchus bonapartei Romer, 1971 (PULR-V 125), femur in posteromedial view. D. Tropidosuchus romeri Arcucci, 1990 (PVL-4604), femur in posteromedial view. Arrows indicate place of the midshaft extraction of bone tissue samples. Scale bars 10 mm.

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Fig. 6 in Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina

Fig. 6. Illustration of the foot rotation in typotherian notoungulates. Schematic anterior view of the ankle of a plantigrade (A) and digitigrade (B) mammal. Colbertia lumbrerense PVL 6227 (C), Typotheria indet. PVL 4292 (D), and "Campanorco inauguralis" IBIGEO-P 105 (E) in anterior view. The colored lines represent the hypothetical tibia long axis (black line), mediolateral axis of the astragalar head (blue line), the plane of the trochlear crests (red line), and the hypothetical metatarsal plane (green line).

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Fig. 5 in Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina

Fig. 5. Tarsal bones of typotherian notoungulate "Campanorco inauguralis" Bond, Vucetich, and Pascual, 1984 (IBIGEO-P 105) from El Simbolar, Salta Province, Argentina, Upper Lumbrera Formation, late middle Eocene (Barrancan subage of the Casamayoran SALMA). A. Left calcaneum in dorsal view. B. Right calcaneum in dorsal (B1) and plantar (B2) views. C. Left calcaneum in lateral view. D. Right calcaneum in lateral (D1) and medial (D2) views. E. Left astragalus in dorsal (E1), plantar (E2), posterior (E3), lateral (E4), and medial (E5) views. F. Left navicular in posterior (F1), anterior (F2), dorsal (F3), plantar (F4), medial (F5), and lateral (F6) views. G. Left cuboid in dorsal (G1), plantar (G2), medial (G3), and posterior (G4) views. Abbreviations: ampt, astragalar medial plantar tuberosity; cub, cuboidal facet; dfor, dorsal astragalar foramen; ect, ectal facet; ecto, ectocuneiform facet; fah, facet for the astragalar head; fc, facet for the calcaneum; fib, fibular facet; gfhl, groove for the tendon of the flexor hallucis longus muscle; ifor, inferior astragalar foramen; lat, lateral process; mec, mesocuneiform facet; metf, metatarsal facet; nav, navicular facet; pfo, peroneal fossa; plm, tendon of the peroneous longus muscle; sm, small concavity; tg, tendinous groove; trf, fossa trochlear.