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81 results for “Aptian”
Fig. 2 in A new rebbachisaurid sauropod from the Aptian-Albian, Lower Cretaceous Rayoso Formation, Neuquén, Argentina
Fig. 2. Rebbachisaurid sauropod Lavocatisaurus agrioensis gen. et sp. nov. from Agrio del Medio (Argentina), Aptian–lower Albian. A. MOZ-Pv1232, axis in lateral view (A1, photograph; A2, drawing); eight cervical vertebrae in lateral view view (A3, photograph; A4, drawing,); anterior caudal vertebra in lateral view (A5); middle caudal vertebra in lateral view (A6); posterior caudal vertebra in lateral view (A7); posteriormost caudal vertebra in lateral view A8); left tibia in lateral view (A9). B. MOZ-Pv 1255, left scapula from a juvenile specimen, in lateral view. C. Skeletal reconstruction based on the holotype and paratype specimens. Scale bars 10 cm.
Fig. 1. A in A new rebbachisaurid sauropod from the Aptian-Albian, Lower Cretaceous Rayoso Formation, Neuquén, Argentina
Fig. 1. A. Map of location and geological outcrops of the region of Agrio del Medio (Neuquén, Argentina), where the material was collected; gray area represents the Neuquén Basin. B. Lithostratigraphic column of the Rayoso Formation in the study area. L, Lavocatisaurus site; S1 and S2, sites of the Rebbachisauridae ichnites (Canudo et al. 2017).
Fig. 5 in A new rebbachisaurid sauropod from the Aptian-Albian, Lower Cretaceous Rayoso Formation, Neuquén, Argentina
Fig. 5. Stratigraphically calibrated strict tree after pruning Lavocatisaurus, showing the geographical provenance of the taxa (silhouettes of continents) and ghost lineages (dashed lines). Abbreviations: AF, Africa, AS, Asia; EU, Europe; SA, South America.
Fig. 4 in A new rebbachisaurid sauropod from the Aptian-Albian, Lower Cretaceous Rayoso Formation, Neuquén, Argentina
Fig. 4. Results of the phylogenetic analysis. A. Strict consensus tree of the 49 500 most parsimonious trees found, showing a complete polytomy amongst Rebbachisauridae with the sole exception of Limaysaurinae. B. Reduced consensus tree after pruning Rayososaurus, showing all possible positions of this taxon. C. Reduced consensus tree after pruning Rayososaurus, Zapalasaurus, and Rebbachisaurus (whose possible positions are indicated by the arrows). Resolved clades are indicated with numbers: 1 , Rebbachisauridae; 2, Limaysaurinae; 3, Rebbachisaurinae; 4, Khebbashia.
Fig. 3 in A nearly complete ornithocheirid pterosaur from the Aptian (Early Cretaceous) Crato Formation of NE Brazil
Fig. 3. New ornithocheirid pterosaur specimen (SMNK PAL 3854) from the Nova Olinda Formation, Crato Basin, Brazil. A. 5th cervical vertebrae. B. 6th and 7th cervical vertebrae. C. 8th and 9th cervical ribs. Photographs (A, B, C) and explanatory drawings (A, B, C). Black shading highlights gaps/foram1 1 1 2 2 2 ina with the bone and the collapsed neurocentral canal.
Fig. 2 in A nearly complete ornithocheirid pterosaur from the Aptian (Early Cretaceous) Crato Formation of NE Brazil
Fig. 2. New ornithocheirid pterosaur specimen (SMNK PAL 3854) from the Nova Olinda Formation, Crato Basin, Brazil. Photograph detailing the cervical, notarial thoracic and terminal caudal vertebrae.
Fig. 1 in A nearly complete ornithocheirid pterosaur from the Aptian (Early Cretaceous) Crato Formation of NE Brazil
Fig. 1. New ornithocheirid pterosaur specimen (SMNK PAL 3854) from the Nova Olinda Formation, Crato Basin, Brazil. Photograph (A) and corresponding line tracing (B).
Fig. 4 in A nearly complete ornithocheirid pterosaur from the Aptian (Early Cretaceous) Crato Formation of NE Brazil
Fig. 4. The foot and pedal function of the new ornithocheirid pterosaur from the Nova Olinda Formation, Crato Basin, Brazil. A. SMNK PAL 3854. Line tracing of the ankle region (A1) and reconstructions of the ornithocheiroid pes, based on the described specimen (A2). B. The azhdarchoid pes, based on SMNK PAL 3900. Both reconstructions are scaled to a common humeral length.
Fig. 3 in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 3. The deltatheroidans Oklatheridium szalayi Davis, Cifelli, and Kielan−Jaworowska, 2008 (A–E) and O. minax sp. nov. (F–H) from the Early Cretaceous of Oklahoma and Texas. A. OMNH 62411, LM1 in occlusal (A1) and buccal (A2) views. B. PM 1238, LM1 in occlusal (B1) and buccal (B2) views. C. OMNH 62410, LM2 (holotype) in occlusal (C1) and buccal (C2) views. D. OMNH 61180, LM2 in occlusal (D1) and buccal (D2) views. E. OMNH 63986, RM3 in occlusal (E1) and buccal (E2) views. F. PM 884, LM1 in occlusal (F1) and buccal (F2) views. G. OMNH 33455, LM2 (holotype) in occlusal (G1) and buccal (G2) views. H. OMNH 63727, RM3 in occlusal (H1) and buccal (H2) views.
Fig. 9. The tribosphenidan Slaughteria eruptens Butler, 1978 in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 9. The tribosphenidan Slaughteria eruptens Butler, 1978 from the Early Cretaceous of Oklahoma and Texas. A. PM 1098, Rp5 in in occlusal (A1) and lingual (A2) views. B. OMNH 63726, Rmx in occlusal (B1) and lingual (B2) views. C. OMNH 63721, Rmx in occlusal (C1) and lingual (C2) views. D. SMP−SMU 61992, left dentary fragment with p2, p3, dp4, and dp5 (holotype) in occlusal (D1) and lingual (D2) views. E. 3−D reconstruction of SMP−SMU 61992 from CT data (in lingual view, bone removed), with developing p4 and p5 indicated (modified from Davis 2011).
Fig. 1 in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 1. Early Cretaceous mammal localities, Trinity Group, Texas and Oklahoma. A. Map detailing outcrop of Antlers Formation (shaded) in southeastern Oklahoma. McLeod Honor Farm (OMNH microvertebrate locality V706) indicated by open circle. B. Map detailing mammal−bearing microvertebrate localities from the Trinity Group (Aptian–Albian): 1, McLeod Honor Farm; 2, Greenwood Canyon; 3, Butler Farm (all Antlers Formation); 4, Paluxy Church (Twin Mountains Formation, late Aptian). From Davis et al. (2008).
Fig. 8. The tribosphenidan Kermackia texana Slaughter, 1971 in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 8. The tribosphenidan Kermackia texana Slaughter, 1971 from the Early Cretaceous of Oklahoma and Texas. A. SMP−SMU 62402, RM1 in occlusal (A1) and buccal (A2) views. B. OMNH 67134, Rp5 in occlusal (B1) and lingual (B2) views. C. PM 1245, Rmx in occlusal (C1) and lingual (C2) views. D. OMNH 63893, Lmx in occlusal (D1) and lingual (D2) views. E. SMP−SMU 62398, Rmx (holotype) in occlusal (E1) and lingual (E2) views. F. PM 922, Rmx in occlusal (F1), lingual (F2), and distal (F3) views (arrow indicates the presence of wear facet 5, sensu Crompton 1971). G. SMP−SMU 61728, left dentary fragment with m3 (holotype of Trinititherium slaughteri Butler, 1978) in occlusal (G1), lingual (G2), and buccal (G3) views (arrow indicates mesial base of ascending ramus, suggesting that the ultimate molar is preserved).
Fig. 11 in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 11. Upper dentitions of Cretaceous eutherians. A. Prokennalestes (P4–M3), Early Cretaceous of Mongolia. B. Paranyctoides (P5–M1), Late Cretaceous of Uzbekistan, Alberta, and Utah. C. Holoclemensia (P4–M3, with some reconstruction indicated by dashed outlines, and P5 hypothetical and shaded grey), Early Cretaceous of Oklahoma and Texas. Note the flange−like parastyle on M1 and reduced stylocone on all molars, shared characteristics of early eutherians. Not to scale. A, modified from KielanJaworowska and Dashzeveg (1989); B modified from Kielan−Jaworowska et al. (2004).
Fig. 7. The basal eutherian Holoclemensia texana Slaughter, 1968b in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 7. The basal eutherian Holoclemensia texana Slaughter, 1968b from the Early Cretaceous of Oklahoma and Texas (A–E). A. SMP−SMU 62399, Lp5 in occlusal (A1) and lingual (A2) views. B. SMP−SMU 61727, Lm1 in occlusal (B1) and lingual (B2) views. C. PM 887, Rm1 in occlusal (C1) and lingual (C2) views. D. PM 1005, Rm2 in occlusal (D1) and lingual (D2) views. E. OMNH 62412, Rm3 in occlusal (E1) and lingual (E2) views. F. SMP−SMU 61726, Lmx referred to Holoclemensia sp. in occlusal (F1) and lingual (F2) views.
Fig. 10 in Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma
Fig. 10. Tribosphenida indet. from the Early Cretaceous of Oklahoma and Texas. A. PM 1075, LM4 in occlusal (A1) and buccal (A2) views. B. PM 948, Rmx in occlusal (B1), lingual (B2), and oblique lingual (B3) views (arrow indicates lingual cingulid).
Supplementary material_Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula
<p>Supplementary material of the article entitled "Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula", submitted to Anais da Academia Brasileira de Ciências</p>
Fig. 3 in Ostracoda (Arthropoda, Crustacea) from the Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, Upper Aptian-Albian
Fig. 3. Extension of the "Megatethys Ocean", or "Mid Cretaceous Tethyan Realm", during the Albian.
Paleomagnetic data associated to publication "Latest Barremian - early Aptian chronostratigraphy and sedimentary evolution of the northwestern Maestrat Basin", Geologica Acta
<p>The data set includes paleomagnetic files in 2G and rs3 format of Th and AF demagnetizations of the NRM, as well as tables with directions of the ChRM and associated data.</p>
FIGURE 1. A in Paraclausastrea vorarlbergensis sp. nov.; a new coral from the Lower Cretaceous of western Austria (Scleractinia; upper Barremian-lower Aptian; Schrattenkalk Fm.; Vorarlberg)
FIGURE 1. A: Map showing the general location of the study area; B: Map marking the Brandalpe-Kuhberg localities, from which the Schrattenkalk material used in this work was collected.
FIGURE 8 in Two echinoid species from the early Aptian (Early Cretaceous) of the Kopet-Dagh Basin, NE Iran
FIGURE 8. Miotoxaster collegnii, all from the vicinity of the village Gelian, NE Iran, (Sarcheshmeh Formation, early Aptian), GSINET97FE238 (A, B); GSINET97FE240 (C); A: plate drawing of the oral surface, B, C: plate drawings of the apical disc; Scale bars equal 10 mm (A) and 2 mm (B).
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