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1,301 results for “Early Cretaceous”
FIGURE 15 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 15. Sapindopsis powelliana (Lesquereux) comb. nov. UF15706-24719, leaf with two opposite lateral leaflets, one ultimate leaflet with long and thin petiolule, and a stipule at the base of petiole (indicated by arrow). Scale bar equals 1 cm.
FIGURE 3 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 3. Cross section of the plant-bearing layer at the southwest end of the north clay pit at the Hoisington III locality, Kansas (Modified from figure 2 of Retallack and Dilcher, 2012).
FIGURE 23 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 23. Wingia expansolobum (Upchurch and Dilcher) comb. nov. 1, UF15706-14828, specimen showing a multi-lobed leaf. Scale bar equals 1 cm. 2, Enlargement of Figure 23.1 (area indicated by the upper arrow) to show secondary and tertiary venation. Scale bar equals 1 mm. 3, Enlargement of Figure 23.1 (area indicated by the lower arrow) to show venation near the lamina margin. Scale bar equals 2 mm.
FIGURE 20. Citrophyllum aligera Lesquereux, 1892. 1 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 20. Citrophyllum aligera Lesquereux, 1892. 1, UF15706-24646, base of leaf showing lamina wing on petiole. Scale bar equals 5 mm. 2, UF15706-24645, base of leaf showing a long petiole with lamina wing and inflated petiolar base. Scale bar equals 5 mm. 3, UF15706-24332. leaf with a long petiole with thin lamina wing and inflated petiolar base. Scale bar equals 1 cm. 4, Enlargement of an area in Figure 20.3 (indicated by arrow) to show looping marginal veins. Scale bar equals 1 mm.
FIGURE 24 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 24. Wingia cf. expansolobum (Upchurch and Dilcher) comb. nov. 1, UF15706-14824, specimen showing two complete and two broken lobes. Note thin venation and glandular teeth. Scale bar equals 3 mm. 2, UF15706-24460, specimen showing five lobes. Note that two lobes (indicated by arrows) are broken. Scale bar equals 1 cm. 3, Enlargement of Figure 24.1 (area indicated by arrow) to show glandular teeth. Scale bar equals 1 mm.
FIGURE 19. 1-2 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 19. 1-2, Anisodromum upchurchii sp. nov., UF15706-24576, middle portion of lamina showing strong primary and secondary veins (scale bar equals 1 cm) (1) and enlargement of an area in Figure 19.1 (indicated by arrow) to show percurrent tertiary veins (scale bar equals 2 mm) (2). 3-4, Anisodromum schimperi (Lesquereux) comb. nov., UF15706-24635, leaf showing uneven spacing of secondary veins and reticulate tertiary veins (scale bar equals 5 mm) (3) and; UF15706-24633, leaf showing secondary venation and reticulate tertiary veins (scale bar equals 5 mm) (4).
FIGURE 25 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 25. Dicotylophyllum skogii sp. nov. 1, UF15706-24573, fragment of leaf to show the petiole and strong primary vein. Scale bar equals 1 cm. 2, Enlargement of Figure 25.1 (area indicated by the upper arrow) to show secondary and intersecondary veins. Scale bar equals 2 mm. 3, Enlargement of the base of the leaf in Figure 25.1 (are indicated by the lower arrow) to show venation. Scale bar equals 2 mm.
FIGURE 13 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 13. Sapindopsis powelliana (Lesquereux) comb. nov. 1, UF15706-14830. leaf with four leaflets. Note two ultimate leaflets appearing to be bilobed (indicated by arrow on the left), two oppositely arranged lateral leaflets, and stipule at the base. Scale bar equals 1 cm. 2, Enlargement of Figure 13.1 (indicated by arrow on the right) to show secondary and tertiary venation. Scale bar equals 2 mm. 3, Enlargement to of Figure 13.1 to show venation of the stipule. Scale bar equals 2 mm. 4, UF15706-14814, an elliptic leaflet with acuminate apex. Scale bar equals 1 cm. 5, Enlargement of Figure 13.4 to show secondary and tertiary venation. Scale bar equals 3 mm.
FIGURE 18 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 18. Anisodromum wolfei Upchurch and Dilcher, 1990. 1, UF15706-14818, general leaflet shape. Note long petiolule. Scale bar equals 1 cm. 2, Enlargement of Figure 18.1 to show strong secondary veins and percurrent tertiary veins oriented perpendicular to the primary vein. Scale bar equals 2 mm. 3, UF15706-24566, general leaflet shape. Scale bar equals 5 mm. 4, Enlargement of Figure 18.3 to show percurrent tertiary veins oriented almost perpendicular to the primary vein. Scale bar equals 2 mm.
FIGURE 12 in Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA
FIGURE 12. Paleonelumbo cf. macroloba Knowlton, 1930. 1, UF15826-24649, specimen showing primary venation (scale bar equals 5 mm) and 2, enlargement to show high order venation and toothed margin (scale bar equals 1 mm).
Figure 4 in The First Cretaceous Epyrine Wasp (Hymenoptera: Bethylidae): A New Genus and Species from Early Cenomanian Kachin Amber
Figure 4. Hukawngepyris setosus gen. et sp. nov., female holotype, MB.I.8638, (A) mesosoma in dorsolateral view; (B) metasoma in left posterolateral view; (C) drawing of fore and hind wings (dashed lines indicate flexion lines; pt = pterostigma). Scale bars = 0.5 mm.
Figure 2 in The First Cretaceous Epyrine Wasp (Hymenoptera: Bethylidae): A New Genus and Species from Early Cenomanian Kachin Amber
Figure 2. Hukawngepyris setosus gen. et sp. nov., female holotype, MB.I.8638, habitus in left lateroventral view. Scale bar = 1 mm.
Figure 3 in The First Cretaceous Epyrine Wasp (Hymenoptera: Bethylidae): A New Genus and Species from Early Cenomanian Kachin Amber
Figure 3. Hukawngepyris setosus gen. et sp. nov., female holotype, MB.I.8638, (A) head in left lateral view; (B) head and partial mesosoma in dorsal view (black arrow: notaulus; white arrow: parapsidal signum); (C) mesosoma in left lateroventral view (black arrow: propleural epicoxal sulcus; white arrow: protibial spur). Scale bars: A = 0.25 mm, B–C = 0.5 mm.
FIGURE 12 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 12. Pycnodus jonesae (SEN 056) from the Late Maastrichtian Cap de Naze Formation discovered at the North Quarry of Poponguine. Left prearticular in occlusal view. Scale = 1 cm.
FIGURE 11 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 11. Maastrichtian invertebrates (internal molds formed in situ) of the Cap de Naze Formation discovered at the North Quarry of Poponguine. A, Turritellidae cf. Mesalia (SEN 060) natural cast in?abapertural view; and B, Naticidae indet. (SEN 071), natural cast in apical view. Scale = 1 cm.
FIGURE 8 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 8. The Islet of Poponguine locality where the Thanetian beds of the Poponguine Formation crop out. A, Overview of locality showing units 2–5 (see text for lithology); B, detail of fine coquina limestone (unit 2) with small cross stratification; C, detail of thick coquina limestone (unit 4) with oblique stratifications dominated by lamellibranches; D, detail of thick coquina limestone (unit 5) with turritellids; and E, detail of limestone breccia (unit 6).
FIGURE 7 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 7. Ndayane Cliff locality at Poponguine with the middle-late Danian Ndayane Formation cropping out. Buildings now cover the brachyanticline (upper right). The Maastricthian Cap de Naze Formation consisting of calcareous sandstone with hard ground underlies the Ndayane Formation unconformably. As seen in the center of the photograph, the beach of Poponguine obscures part of unit 1 of the Ndayane Formation. Unit 1 consists of calcareous sandstone with beds of marls and unit 2 of marls with calcite rosettes.
FIGURE 6 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 6. Contact between the Danian Ndayane Formation and the overlying Thanetian Poponguine Formation in the North Quarry of Poponguine locality.
FIGURE 14 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 14. Late Maastrichtian Testudines from the Upper Cap de Naze Formation of the North Quarry of Poponguine. A, Partial plastron in ventral view (SEN 054). Dotted lines mirrored to show extent of preservation. B, Peripheral carapace fragment in dorsal view (SEN 054). C, Partial neural bone in dorsal view (SEN 080). Abbreviations: ent, entoplastron; epi, epiplastron; hyo, hyoplastron. Scale = 2 cm.
FIGURE 3 in A Composite Section of Fossiliferous Late Cretaceous- Early Paleogene Localities in Senegal and Preliminary Description of a New Late Maastrichtian Vertebrate Fossil Assemblage
FIGURE 3. Composite stratigraphic section correlating four fossiliferous Late Cretaceous–Early Paleogene localities of Western Senegal. Units are unique to each locality (i.e., unit 2 of the Ndayane Formation at the North Quarry locality is not necessarily the same as unit 2 of the Ndayane Formation at the Ndayane Cliff at Poponguine locality). Abbreviations: Camp, Campanian; CdN., Cap de Naze; Dan, Danian; Fm, formation; fs, fine sand; ms, medium sand; L, late; M/L, Middle to Late; Maas, Masstrichtian; Mid, middle; mst, mudstone; Nda., Ndayane Formation; Popo., Poponguine; pst, packstone; u, unit; wst, wackestone. Gray caps on three of the localities are Plio-Pleistocene ferruginous rocks.
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Allen Brain Atlas
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