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191 results for “early Oligocene”
FIG. 5. — A-D in Carnivora from the early Oligocene of the ' Phosphorites du Quercy' in southwestern France
FIG. 5. — A-D, Dinailurictis bonali Helbing, 1922: A, right distal humerus UM VBOA3-15 in cranial (A1), and caudal (A2) views; B, piece of right proximal femur, UM VBOA3-16, cranial view; C, left distal ulna, UM VD45, cranial view; D, left lower canine, UM VD46, buccal view; E, H-J, Nimravus intermedius; E, left P4 UP LPL4, in occlusal view; H, right p4 UP LPL5, in buccal (H1), and lingual (H2) views; I, left P4, UP LPL4, in buccal view; J, right m1, UP LPL1711, in buccal (J1), lingual (J2), and occlusal (J3) views; F, Mustelictis aff. olivieri, left P4 UM VBO494, in buccal view; G, Pachycynodon cf. dubius? m2, UM VBOA3-9, in occlusal view; K, L, Eusmilus bidentatus, right upper canine, UM VD3, in lingual (K1), and buccal (K2) views; L, right P4, UM VD2, in buccal (L1), and lingual (L2) views; M, Eofelis edwardsi, right upper canine, UM VBO454, in lingual (M1), and buccal (M2) views. Scale bars: A, B, C, D, I, M, 5 mm; E, H, J, K, L, 10 mm.
Data from: The early history of Annonaceae (Magnoliales) in Southeast Asia suggests floristic exchange between India and Pan-Indochina by the late Oligocene
The collision between India and Eurasia in the mid‐Palaeogene facilitated terrestrial floristic exchange. However, due to the complexity of this geological event and scarcity of fossil record, the plant migration patterns between the two plates are still highly debated. In this study, we focus on the Oligocene floristic exchange between India and Pan‐Indochina mainly based on a carpological study of Annonaceae, an emblematic family unique in its pantropical distribution and frugivore‐based dispersal strategy. A new seed species, Anonaspermum orientalis sp. nov., is described from the upper Oligocene Yongning Formation of Guangxi, southern China. The species represents the earliest known occurrence of this family in Pan‐Indochina. The specimens are characterized by ovate–elliptic seed shape, thicker seed testa, two‐lobed organization, lamelliform rumination and an obvious cone‐like plug. The palaeobiogeographical reconstruction of Annonaceae indicates that the most parsimonious dispersal scenario for the annonaceous taxon from the late Oligocene of China is the Out‐of‐India route, in parallel with other plant genera inferred to have migrated between India and Pan‐Indochina during that period.
Figure 3 in A new dwarf boa (Serpentes, Booidea, 'Tropidophiidae') from the Early Oligocene of Belgium: a case of the isolation of Western European snake faunas
Figure 3. Cloacal and caudal vertebrae of Falseryx neervelpensis sp. nov. A–C, cloacal vertebra (IRSNB R 233), in left lateral (A), posterior (B) and dorsal (C) views; D–H, anterior caudal vertebra (IRSNB R 234), in left lateral (D), posterior (E), anterior (F), dorsal (G) and ventral (H) views; I and J, middle caudal vertebra (IRSNB R 235), in left lateral (I) and posterior (J) views; K and L, posterior caudal vertebra (IRSNB R 236), in left lateral (K) and posterior (L.) views. Abbreviations: ha, haemapophyses; h, hypapophysis; ls, lymphapophyses; pl, pleurapophyses.
Identification of the Oligocene to early Miocene loricariid catfish †Taubateia paraiba as a member of the Rhinelepinae: List of taxa for which comparative CT-data were examined
<p>One of the earliest and most complete loricariid fossils is<i> †Taubateia paraiba, </i>which was described by Malabarba and Lundberg (2007) from southeastern Brazil based on a ventral impression of a neurocranium and some vertebrae. The fossil is from lacustrine habitat of the Tremembé Formation of the Taubaté Group, which is dated to the Oligocene to Early Miocene (~30–20 Mya). The locality (22°50' S, 45°52' W) is currently part of the Paraná River basin. Based on an extensive database of measurements of loricariids by the authors, the 54.5 mm long skull, equates to approximately 70 mm head length (snout to tip of supraoccipital), indicating a specimen that is ~175–210 mm long, which is fairly large for loricariids. In the original description, Malabarba and Lundberg described the anatomy of the fossil in detail, but they were unable to resolve the identity of the fish beyond its placement within Loricariidae.</p>
Fig. 18 in Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru
Fig. 18. The callianassid ghost shrimp Eucalliax capsulasetaea sp. nov. from early Oligocene seep deposits at Cerro La Salina, blocks 2, 4, 6, 7, in the Talara Basin, northern Peru. A. Holotype (NRM Ar69394), right propodus in outer lateral view. B. Paratype (NRM Ar69376), right propodus in inner lateral view. C. Paratype (NRM Ar69383), right propodus in dorsal (C1), dorso-lateral (C2), outer lateral (C3), and inner lateral (C4) views. D. Paratype (NRM Ar69398), right propodus in outer lateral view. E. Paratype (NRM Ar69393), left propodus in outer lateral view. F. Paratype (NRM Ar69401), left propodus in inner lateral (F1), outer lateral (F2) and dorso-lateral (F3, F4) views. G. Paratype (NRM Ar69397), right propodus in outer lateral view. H. Paratype (NRM Ar69377), left carpus in outer lateral view. I. NRM Ar69399, right fixed finger in occlusal view. J. NRM Ar69388, right dactylus in outer lateral view. K–N. Details of capsulated setae on outer lateral surfaces of major cheliped propodi. K. NRM Ar69398. L. NRM Ar69393. M. NRM Ar69394. N. NRM Ar69383. Scale bars 5 mm.
Fig. 11 in Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru
Fig. 11. The vetigastropod Pyropelta seca sp. nov. from early Oligocene seep deposits at Cerro La Salina block 6, Talara Basin, northern Peru. A. Paratype NRM Mo187035) in lateral (A1) and apical (A2) views. B. Holotype (NRM Mo187036) in lateral (B1) and apical (B2) views. C. Paratype (NRM Mo187037) in lateral (C1) and apical (C2) views. D. Paratype (NRM Mo187038) in lateral (D1) and apical (D2) views. E. Paratype (NRM Mo187039) in anterior view.
Fig. 9 in Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru
Fig. 9. Limpet gastropods from early Oligocene seep deposits at Cerro La Salina (block 6, B, C; block 9, A) Talara Basin, northern Peru. A. Limpet indet. 1 (NRM Mo187032) in lateral view (A1), apical view (A2) and seen from anterior view (A3). B. Limpet indet. 2 (NRM Mo187033) in apical (B1) and lateral (B2) views. C. The cocculinid Coccopigya sp. (NRM Mo187034) in apical (C1) and lateral (C2) views.
Fig. 4 in Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru
Fig. 4. The thyasirid Conchocele tessaria (Olsson, 1931) from early Oligocene seep deposits at Cerro La Salina (block 1, E; block 7, A–C; block 8, D), Talara Basin, northern Peru. A, B. Left valve of large specimen (A, NRM Mo187005; B, NRM Mo187006). C. Medium-sized specimen (NRM Mo187007), right valve showing fine growth increments (C1), dorsal view showing lunule (C2), left valve showing dorsal sulcus (C3). D. Small specimen (NRM Mo187008), left valve showing a healed shell injury (D1), right valve showing dorsal sulcus (D2) and dorsal view showing lunule posterior area (D3). E. Small specimen (NRM Mo187010) showing hinge of right valve.
Fig. 3 in New skeleton from the early Oligocene of Germany indicates a stem-group position of diomedeoidid birds
Fig. 3. Stratigraphy of the Rheinweiler locality. Note that the layers containing the bird are situated at about 1.5 m, between the samples RW17 and RW18 (shown in bold).
Text-fig. 4. a – c: Celtis pirskenbergensis (KNOBLOCH) WALTHER et KVAČEK stat. n., a – Sf. 2353, b – Sf. 2354, c – epitype, Sf. 2377; d – Celtis (?) bohemica ENGELHARDT, Sf. 2234:1, all nat. size. in Early Oligocene Flora Of Seifhennersdorf (Saxony)
Text-fig. 4. a – c: Celtis pirskenbergensis (KNOBLOCH) WALTHER et KVAČEK stat. n., a – Sf. 2353, b – Sf. 2354, c – epitype, Sf. 2377; d – Celtis (?) bohemica ENGELHARDT, Sf. 2234:1, all nat. size.
Text-fig. 1. Location of the discussed early Oligocene sites in the northern part of the Bohemian Massif (the Czech Republic and Saxony) – 1. Knížecí, Hrazený hill, 2. Kundratice, 3. Hammerunterwiesenthal, 4. Holý Kluk, 5. Seifhennersdorf, 6. Bechlejovice. in Revision Of The Early Oligocene Flora Of Hrazený Hill (Formerly Pirskenberg) In Knížecí Near Šluknov, North Bohemia
Text-fig. 1. Location of the discussed early Oligocene sites in the northern part of the Bohemian Massif (the Czech Republic and Saxony) – 1. Knížecí, Hrazený hill, 2. Kundratice, 3. Hammerunterwiesenthal, 4. Holý Kluk, 5. Seifhennersdorf, 6. Bechlejovice.
Text-fig. 7. Maxillary (labial view) with maxillary foramen (arrows) from A – Cyprinus carpio (Cyprininae) showing the schematic reconstruction of the nervus trigeminus and the rostral barbel, B – Ctenopharyngodon idella (Xenocyprininae), C – Tinca tinca (Tincinae), (images not to scale). in Revision Of The Cyprinids From The Early Oligocene Of The České Středohoří Mountains, And The Phylogenetic Relationships Of Protothymallus Laube, 1901 (Teleostei, Cyprinidae, Gobioninae)
Text-fig. 7. Maxillary (labial view) with maxillary foramen (arrows) from A – Cyprinus carpio (Cyprininae) showing the schematic reconstruction of the nervus trigeminus and the rostral barbel, B – Ctenopharyngodon idella (Xenocyprininae), C – Tinca tinca (Tincinae), (images not to scale).
Text-fig. 9. Protothymallus elongatus (KRAMBERGER, 1885): Pharyngeal bone (medial view) with attached teeth (SMMGD SaT-620). in Revision Of The Cyprinids From The Early Oligocene Of The České Středohoří Mountains, And The Phylogenetic Relationships Of Protothymallus Laube, 1901 (Teleostei, Cyprinidae, Gobioninae)
Text-fig. 9. Protothymallus elongatus (KRAMBERGER, 1885): Pharyngeal bone (medial view) with attached teeth (SMMGD SaT-620).
Text-fig. 3. Protothymallus elongatus (KRAMBERGER, 1885): reconstruction of the neurocranium in dorsal view based on UL-V2. in Revision Of The Cyprinids From The Early Oligocene Of The České Středohoří Mountains, And The Phylogenetic Relationships Of Protothymallus Laube, 1901 (Teleostei, Cyprinidae, Gobioninae)
Text-fig. 3. Protothymallus elongatus (KRAMBERGER, 1885): reconstruction of the neurocranium in dorsal view based on UL-V2.
Text-fig. 8. Protothymallus elongatus (KRAMBERGER, 1885): A – dental in lingual view (SMMGD SaT-156), B – dental in labial view (SMMGD SaT-172), C – epihyal (SMMGD SaT-168), D – ceratohyal (SMMGD SaT-168), E – basipterygial (SMMGD SaT-413), F – vomer (SMMGD SaT-156). in Revision Of The Cyprinids From The Early Oligocene Of The České Středohoří Mountains, And The Phylogenetic Relationships Of Protothymallus Laube, 1901 (Teleostei, Cyprinidae, Gobioninae)
Text-fig. 8. Protothymallus elongatus (KRAMBERGER, 1885): A – dental in lingual view (SMMGD SaT-156), B – dental in labial view (SMMGD SaT-172), C – epihyal (SMMGD SaT-168), D – ceratohyal (SMMGD SaT-168), E – basipterygial (SMMGD SaT-413), F – vomer (SMMGD SaT-156).
Text-fig. 13: Cladogram showing the systematic position of Protothymallus within the Gobioninae, (for the character states see Tab. 1 and text). in Revision Of The Cyprinids From The Early Oligocene Of The České Středohoří Mountains, And The Phylogenetic Relationships Of Protothymallus Laube, 1901 (Teleostei, Cyprinidae, Gobioninae)
Text-fig. 13: Cladogram showing the systematic position of Protothymallus within the Gobioninae, (for the character states see Tab. 1 and text).
Morphometric Analysis of Coccolithophore genus Reticulofenestra during late Eocene to early Oligocene
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FIG. 4 in Two New Taxa (Caviomorpha, Rodentia) from the Early Oligocene Tinguiririca Fauna (Chile)
FIG. 4. (A) Scanning electron micrograph and (B) drawing of the holotype of Andemys termasi, SGOPV 2933 in lateral view illustrating the level of hypsodonty. Labial views of the lower dentitions of (C) Branisamys luribayensis PU 21944; (D) Incamys bolivianus PU 2093; and (E) Neoreomys australis AMNH 9542.
Fig. 3 in Propalaeocastor (Rodentia, Mammalia) from the Early Oligocene of Burqin Basin, Xinjiang
Fig. 3. Line drawing of right P4–M3 of Propalaeocastor irtyshensis, n.sp. (IVPP V13690). A, Labial view; B, occlusal view; C, lingual view.
FIG 5 in Eomakhaira molossus, A New Saber-Toothed Sparassodont (Metatheria: Thylacosmilinae) from the Early Oligocene (?Tinguirirican) Cachapoal Locality, Andean Main Range, Chile
FIG 5. Relative maxilla height and dentary depth (measured at m3–4 embrasure) in sparassodont specimens for which both maxilla and dentary are known, scaled to lower molar row length. Eomakhaira molossus is denoted by a star. Skulls of several taxa are illustrated to highlight variation. Skulls of Arctodictis sinclairi, Acyon myctoderos, Callistoe vincei, and Thylacosmilus atrox modified from Forasiepi (2009), Forasiepi et al. (2006), Babot et al. (2002), and Riggs (1934), respectively. Data for this figure can be found in table S1.
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Allen Brain Atlas
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