Find research datasets worth reusing

Text-fig. 2. Map of Partizansk coal basin with early angiosperm localities. a: Severosuchan Formation, Aptian; b: Frentsevka Formation, early-middle Albian. 1 – Novoveselaya village; 2 – 3rd Kamenka River; 3 – Bolshoy Kuvshin; 4 – Andreev Inlet. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 2. Map of Partizansk coal basin with early angiosperm localities. a: Severosuchan Formation, Aptian; b: Frentsevka Formation, early-middle Albian. 1 – Novoveselaya village; 2 – 3rd Kamenka River; 3 – Bolshoy Kuvshin; 4 – Andreev Inlet.

Text-fig. 3. Map of Razdolnaya coal basin with early angiosperm localities. a: Lipovtsy Formation, Aptian; b: Galenki Formation, early-middle Albian. 1 – Porechye coal mine; 2 – Konstantinovka; 3 – Aleksee-Nikolskoe coal mine; 4 – Fedorovsky Rudnik; 5 – Podgorodenka coalfield; 6 – Firsov Cape. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 3. Map of Razdolnaya coal basin with early angiosperm localities. a: Lipovtsy Formation, Aptian; b: Galenki Formation, early-middle Albian. 1 – Porechye coal mine; 2 – Konstantinovka; 3 – Aleksee-Nikolskoe coal mine; 4 – Fedorovsky Rudnik; 5 – Podgorodenka coalfield; 6 – Firsov Cape.

Text-fig. 5. SRXTM images of Miranthus elegans gen. et sp. nov.; Mira locality, Portugal. a, b: Transverse sections of flower (a, orthoslice xy0665 close to the apex of placenta; b, orthoslice xy0800 in middle part of placenta) showing remains of calyx with distinct bundles (arrows), ovary wall (ow) and numerous ovules (ov) on the central mushroom-shaped globose placenta (pl) with central column (cc). c: Transverse section of flower (orthoslice xy0620) through perianth and ovary (ow) at a level above the placenta showing ovules (ov) and cellular preservation of the sepal bundles (arrows shown for one sepal); note abaxial surface of sepals with thick-walled epidermal cells, thick cuticle, and fine pointed verrucae. d: Longitudinal section of flower (orthoslice xz0500) showing perigynous position of calyx and semi-inferior ovary (ow, ovary wall) with a central placenta (pl), central column (cc) and numerous ovules (ov); note spiny verrucae on abaxial surface of calyx lobes. Specimens, Mira 100-S153145 (a, b), Mira 100-S170155 (c, d, holotype). Scale bars = 600 µm (a–d). in Early Flowers Of Primuloid Ericales From The Late Cretaceous Of Portugal And Their Ecological And Phytogeographic Implications

Text-fig. 5. SRXTM images of Miranthus elegans gen. et sp. nov.; Mira locality, Portugal. a, b: Transverse sections of flower (a, orthoslice xy0665 close to the apex of placenta; b, orthoslice xy0800 in middle part of placenta) showing remains of calyx with distinct bundles (arrows), ovary wall (ow) and numerous ovules (ov) on the central mushroom-shaped globose placenta (pl) with central column (cc). c: Transverse section of flower (orthoslice xy0620) through perianth and ovary (ow) at a level above the placenta showing ovules (ov) and cellular preservation of the sepal bundles (arrows shown for one sepal); note abaxial surface of sepals with thick-walled epidermal cells, thick cuticle, and fine pointed verrucae. d: Longitudinal section of flower (orthoslice xz0500) showing perigynous position of calyx and semi-inferior ovary (ow, ovary wall) with a central placenta (pl), central column (cc) and numerous ovules (ov); note spiny verrucae on abaxial surface of calyx lobes. Specimens, Mira 100-S153145 (a, b), Mira 100-S170155 (c, d, holotype). Scale bars = 600 µm (a–d).

Text-fig. 16. Reconstruction of herbaceous angiosperms from Bolshoy Kuvshin locality, Frentsevka Formation, early-middle Albian. a: undescribed species, spec. IBSS 320-137; b: Achaenocarpites capitellatus KRASSILOV et VOLYNETS. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 16. Reconstruction of herbaceous angiosperms from Bolshoy Kuvshin locality, Frentsevka Formation, early-middle Albian. a: undescribed species, spec. IBSS 320-137; b: Achaenocarpites capitellatus KRASSILOV et VOLYNETS.

Text-fig. 15. Reconstruction of herbaceous angiosperms from Bolshoy Kuvshin locality, Frentsevka Formation, early-middle Albian. a: Asiatifolium elegans G.SUN, SHUANG X.GUO et SHAO L.ZHENG; b: Jixia pinnatipartita SHUANG X.GUO et G.SUN. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 15. Reconstruction of herbaceous angiosperms from Bolshoy Kuvshin locality, Frentsevka Formation, early-middle Albian. a: Asiatifolium elegans G.SUN, SHUANG X.GUO et SHAO L.ZHENG; b: Jixia pinnatipartita SHUANG X.GUO et G.SUN.

Text-fig. 14. Bolshoy Kuvshin, Frentsevka Formation, early-middle Albian. a, e: Asiatifolium elegans G.SUN, SHUANG X.GUO et SHAO L.ZHENG, a – spec. IBSS 320-8, e – spec. IBSS 320-75; b, c: Jixia pinnatipartita SHUANG X.GUO et G.SUN, b – spec. IBSS 320-359, c – spec. IBSS 320-367; d: Achaenocarpites capitellatus KRASSILOV et VOLYNETS, spec. IBSS 320-120; f: Ternaricarpites floribundus KRASSILOV et VOLYNETS, spec. IBSS 320-10; g: undescribed species, spec. IBSS 320-137. Scale bar 1 cm in a, e–g and 5 mm in b–d. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 14. Bolshoy Kuvshin, Frentsevka Formation, early-middle Albian. a, e: Asiatifolium elegans G.SUN, SHUANG X.GUO et SHAO L.ZHENG, a – spec. IBSS 320-8, e – spec. IBSS 320-75; b, c: Jixia pinnatipartita SHUANG X.GUO et G.SUN, b – spec. IBSS 320-359, c – spec. IBSS 320-367; d: Achaenocarpites capitellatus KRASSILOV et VOLYNETS, spec. IBSS 320-120; f: Ternaricarpites floribundus KRASSILOV et VOLYNETS, spec. IBSS 320-10; g: undescribed species, spec. IBSS 320-137. Scale bar 1 cm in a, e–g and 5 mm in b–d.

Text-fig. 11. a: Sapindopsis sp., 3rd Kamenka, Frentsevka Formation, early-middle Albian, spec. IBSS 40-1; b, c: Trochodendroides sp., Konstantinovka, Galenki Formation, early-middle Albian, spec. IBBS 11/145, b – upper part of leaf, c – crenate margin; d: Dicotylophyllum sp. 2, Konstantinovka, Galenki Formation, early-middle Albian, spec. IBBS 11/133; e: Sapindopsis cf. angusta (HEER) SEWARD et V.M.CONWAY, Andreev Inlet, Frentsevka Formation, early-middle Albian, spec. IBSS 28/104; f: Sapindopsis variabilis FONTAINE, Bikin River, Alchan Formation, early-middle Albian, spec. IBSS 4561/124-1; g: Laurophyllum sp., Konstantinovka, Galenki Formation, early-middle Albian, spec. IBBS 11/131. Scale bar 1 cm in a, b, d, f, g and 5 mm in c, e. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 11. a: Sapindopsis sp., 3rd Kamenka, Frentsevka Formation, early-middle Albian, spec. IBSS 40-1; b, c: Trochodendroides sp., Konstantinovka, Galenki Formation, early-middle Albian, spec. IBBS 11/145, b – upper part of leaf, c – crenate margin; d: Dicotylophyllum sp. 2, Konstantinovka, Galenki Formation, early-middle Albian, spec. IBBS 11/133; e: Sapindopsis cf. angusta (HEER) SEWARD et V.M.CONWAY, Andreev Inlet, Frentsevka Formation, early-middle Albian, spec. IBSS 28/104; f: Sapindopsis variabilis FONTAINE, Bikin River, Alchan Formation, early-middle Albian, spec. IBSS 4561/124-1; g: Laurophyllum sp., Konstantinovka, Galenki Formation, early-middle Albian, spec. IBBS 11/131. Scale bar 1 cm in a, b, d, f, g and 5 mm in c, e.

Text-fig. 17. Angiosperm leaf morphotypes in late Aptian and early-middle Albian of Primorye. a, k: Dicotylophyllum sp. 1, 2; b: Araliaephyllum vittenburgii GOLOVN. et VOLYNETS; c: Araliaephyllum ussuriense (KRASSILOV) GOLOVN.; d: Trochodendroides sp., e: undescribed species, spec. IBSS 320-137; f: Asiatifolium elegans G.SUN, SHUANG X.GUO et SHAO L.ZHENG; g: Sapindopsis cf. angusta (HEER) SEWARD et V.M.CONWAY; h: Sapindopsis sp.; i: Achaenocarpites capitellatus KRASSILOV et VOLYNETS; j: Jixia pinnatipartita SHUANG X.GUO et G.SUN; l: Pandanites ahnertii (KRYSHT.) GOLOVN.; m: Araliaephyllum luciferum (KRYSHT.) GOLOVN. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 17. Angiosperm leaf morphotypes in late Aptian and early-middle Albian of Primorye. a, k: Dicotylophyllum sp. 1, 2; b: Araliaephyllum vittenburgii GOLOVN. et VOLYNETS; c: Araliaephyllum ussuriense (KRASSILOV) GOLOVN.; d: Trochodendroides sp., e: undescribed species, spec. IBSS 320-137; f: Asiatifolium elegans G.SUN, SHUANG X.GUO et SHAO L.ZHENG; g: Sapindopsis cf. angusta (HEER) SEWARD et V.M.CONWAY; h: Sapindopsis sp.; i: Achaenocarpites capitellatus KRASSILOV et VOLYNETS; j: Jixia pinnatipartita SHUANG X.GUO et G.SUN; l: Pandanites ahnertii (KRYSHT.) GOLOVN.; m: Araliaephyllum luciferum (KRYSHT.) GOLOVN.

Text-fig. 12. a: Artocarpidium sp., Andreev Inlet, Frentsevka Formation, early-middle Albian, spec. IBSS 28-105; b–d: Onoana nicanica KRASSILOV, Fedorovsky Rudnik, Lipovtsy Formation, Aptian, spec. IBSS 63-83; e: Araliaephyllum ussuriense (KRASSILOV) GOLOVN., Andreev Inlet, Frentsevka Formation, early-middle Albian, e1 – spec. IBSS 28-102/1, lectotype, e2 – spec. IBSS 28-102/2. Scale bar 1 cm in a, d, e and 5 mm in b, c. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 12. a: Artocarpidium sp., Andreev Inlet, Frentsevka Formation, early-middle Albian, spec. IBSS 28-105; b–d: Onoana nicanica KRASSILOV, Fedorovsky Rudnik, Lipovtsy Formation, Aptian, spec. IBSS 63-83; e: Araliaephyllum ussuriense (KRASSILOV) GOLOVN., Andreev Inlet, Frentsevka Formation, early-middle Albian, e1 – spec. IBSS 28-102/1, lectotype, e2 – spec. IBSS 28-102/2. Scale bar 1 cm in a, d, e and 5 mm in b, c.

Text-fig. 9. a–d: Nyssidium orientale SAMYLINA, Partizansk, Starosuchan Formation, Barremian, a – spec. BIN 506/3749, general view of four fruits, b1 – spec. BIN 506/3749-1, holotype, b2 – spec. BIN 506/3749-2, c – spec. BIN 506/3749-6, d – spec. BIN 506/3749-5; e–f: Cercidiphyllum sujfunense KRASSILOV, Konstantinovka, Galenki Formation, early-middle Albian, e – spec. IBSS 11-135, fruit, f – spec. IBSS 11-134, leaf, holotype. Scale bar 5 mm in a, e, f and 2 mm in b–d. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 9. a–d: Nyssidium orientale SAMYLINA, Partizansk, Starosuchan Formation, Barremian, a – spec. BIN 506/3749, general view of four fruits, b1 – spec. BIN 506/3749-1, holotype, b2 – spec. BIN 506/3749-2, c – spec. BIN 506/3749-6, d – spec. BIN 506/3749-5; e–f: Cercidiphyllum sujfunense KRASSILOV, Konstantinovka, Galenki Formation, early-middle Albian, e – spec. IBSS 11-135, fruit, f – spec. IBSS 11-134, leaf, holotype. Scale bar 5 mm in a, e, f and 2 mm in b–d.

Text-fig. 10. a–d: Araliaephyllum luciferum (KRYSHT.) GOLOVN., Partizansk, Severosuchan Formation, Aptian, a – spec. TSNIGRM 3013/1, lectotype, b – spec TSNIGRM 3013/2, c – spec. TSNIGRM 3013/4, d – spec. TSNIGRM 3013/3; e, j: Pandanites ahnertii (KRYSHT.) GOLOVN., Konstantinovka, Lipovtsy Formation, Aptian, TSNIGRM 3013/5, e – fragment of leaf margin, j – general view, j1 – lectotype, j2 – leaf, figured in (e); f: Araliaephyllum ussuriense (KRASSILOV) GOLOVN., Andreev Inlet, Frentsevka Formation, early-middle Albian, spec. IBBS 28/103; g: Araliaephyllum vittenburgii GOLOVN. et VOLYNETS, Podgorodenka coalfield, Galenki Formation, early-middle Albian, spec. IBBS 41/1, g1 – spec. IBBS 41/1a, holotype, g2 – spec. IBBS 41/1b; h: Dicotylophyllum sp. 1, Podgorodenka coalfield, Lipovtsy Formation, Aptian, spec. IBBS 28L-4; i: Sapindopsis sp., 3rd Kamenka, Frentsevka Formation, early-middle Albian, spec. IBSS 325/8. Scale bar 5 mm in a–h and 1 cm in i, j. in Angiosperm Diversification In The Early Cretaceous Of Primorye, Far East Of Russia

Text-fig. 10. a–d: Araliaephyllum luciferum (KRYSHT.) GOLOVN., Partizansk, Severosuchan Formation, Aptian, a – spec. TSNIGRM 3013/1, lectotype, b – spec TSNIGRM 3013/2, c – spec. TSNIGRM 3013/4, d – spec. TSNIGRM 3013/3; e, j: Pandanites ahnertii (KRYSHT.) GOLOVN., Konstantinovka, Lipovtsy Formation, Aptian, TSNIGRM 3013/5, e – fragment of leaf margin, j – general view, j1 – lectotype, j2 – leaf, figured in (e); f: Araliaephyllum ussuriense (KRASSILOV) GOLOVN., Andreev Inlet, Frentsevka Formation, early-middle Albian, spec. IBBS 28/103; g: Araliaephyllum vittenburgii GOLOVN. et VOLYNETS, Podgorodenka coalfield, Galenki Formation, early-middle Albian, spec. IBBS 41/1, g1 – spec. IBBS 41/1a, holotype, g2 – spec. IBBS 41/1b; h: Dicotylophyllum sp. 1, Podgorodenka coalfield, Lipovtsy Formation, Aptian, spec. IBBS 28L-4; i: Sapindopsis sp., 3rd Kamenka, Frentsevka Formation, early-middle Albian, spec. IBSS 325/8. Scale bar 5 mm in a–h and 1 cm in i, j.

opencc-by-4.0Dec 2008View details →

Text-fig. 3. Schematic section through the Żyttawa (Zittau) Basin, on the Czech and Polish boundary; Hrádek n. Nisou and Turów parts of the basin. Explanation of the symbols. 1 – Overlying strata with the upper coal seam, 2 – middle and lower strata with the coal seam (Miocene), 3 – first sedimentary setting with basal coal seam (Miocene / Oligocene), 4 – alcalic volcanism (Tertiary), 5 – Upper Cretaceous deposits, 6 - underlying rocks of the basin. (Adapted after Václ 1967, Václ and Čadek, 1962, modified). in Some Monocot Pollen Taxa From The Lower Miocene Basal Coaly Deposits Of The Czech And Polish Parts Of The Żytawa (Zittau) Basin

Text-fig. 3. Schematic section through the Żyttawa (Zittau) Basin, on the Czech and Polish boundary; Hrádek n. Nisou and Turów parts of the basin. Explanation of the symbols. 1 – Overlying strata with the upper coal seam, 2 – middle and lower strata with the coal seam (Miocene), 3 – first sedimentary setting with basal coal seam (Miocene / Oligocene), 4 – alcalic volcanism (Tertiary), 5 – Upper Cretaceous deposits, 6 - underlying rocks of the basin. (Adapted after Václ 1967, Václ and Čadek, 1962, modified).

Fig. 3 in New albanerpetontid amphibians from the Early Cretaceous of Morocco and Middle Jurassic of England

Fig. 3. Jaws of Anoualerpeton priscus sp. nov.; Middle Jurassic (late Bathonian), Kirtlington, England. A–C. Premaxillae. A. BMNH R.16336, holotype, left premaxilla, lacking dorsal part of pars dorsalis, lateral part of pars dentalis, and most of pars palatinum and preserving no intact teeth, in lingual (A1) and laterolingual (A2) views. B. BMNH R.16337, right premaxilla, lacking dorsal part of pars dorsalis and medial pars of pars palatinum and pars dentalis, in labial (B1) and lingual (B2) views. C. BMNH R.14157, right premaxilla, lacking dorsal part of pars dorsalis, ventral part of pars dentalis, and lateral end of maxillary process and preserving no intact teeth, in lingual (C1) and dorsal (C2) views, both with hair extending obliquely through palatal foramen, and in occlusal (C3) view. D. BMNH R.16338, left maxilla, missing part of pars dentalis below nasal process and about posterior one−fifth of bone, in labial (D1), lingual (D2), and dorsal (D3) views. E–H. Dentaries, all in lingual view. E. BMNH R.16344, left dentary, posteriorly incomplete ramus preserving about anterior one−quarter of bone. F. BMNH R.16354, right dentary, anteriorly and posteriorly incomplete ramus preserving posterior part of tooth row and anterior part of area for attachment of postdentary bones; G, BMNH R.16356, left dentary, anteriorly and posteriorly incomplete ramus preserving about posterior

Fig. 1 in New albanerpetontid amphibians from the Early Cretaceous of Morocco and Middle Jurassic of England

Fig. 1. Upper jaws and frontals of Anoualerpeton unicus sp. nov., type species; Lower Cretaceous (Berriasian), Anoual, Morocco. A, B. Premaxillae. A. MNHN.MCM 187, holotype, right premaxilla, lacking pars palatinum, in labial (A1) and lingual (A2) views. B. MNHN.MCM 188, left premaxilla, lacking dorsolateral part of pars dorsalis and vomerine and maxillary processes on pars palatinum, in labial (B1) and lingual (B2) views. C. MNHN.MCM 189, left maxilla, lacking about posterior one−fifth of bone, in labial (C1), lingual (C2), and dorsal (C3) views. D, E. Fused frontals. D. MNHN.MCM 190, nearly complete frontals, lacking distal end of left anterolateral process and posterior end of ventrolateral crests on both sides, entire specimen in dorsal (D1) and ventral (D2) views and closeup of anterior part in right lateral view (D3). E. MNHN.MCM 191, less nearly complete frontals, missing distal tip of internasal process, posterior end of left ventrolateral crest, and right posterolateral corner of bone and showing damage to median portion sustained during photography (cf., Fig. 2K), in dorsal view. White areas are broken surfaces and cross hatches are sand grains. Specimens at different scales.

Fig. 5 in New albanerpetontid amphibians from the Early Cretaceous of Morocco and Middle Jurassic of England

Fig. 5. Strict consensus of three shortest trees, based on branch−and−bound search of 20 informative characters scored for 10 albanerpetontid taxa and a hypothetical "all zero" ancestor (see Appendix). Indices of support for less inclusive clades are reported in Table 1. Distribution of apomorphies for all 29 characters are depicted according to the more conservative and preferred DELTRAN character state optimization. Distribution of apomorphies within the gracile−snouted clade is based on one of the three shortest trees that has the same topology for this clade as the strict consensus tree. The ACCTRAN optimization differs in shifting four derived character states one node down towards the stem, as follows: 2(1) to the node for Anoualerpeton; 6(1) to the node for the robust−snouted clade; 22(2) to the node for the unnamed Tertiary clade; and 27(1) to the node for Celtedens + Albanerpeton. Symbols for apomorphies are: horizontal bar, synapomorphic or autapomorphic; circle, convergent. Tree statistics (uninformative characters excluded): tree length = 32 steps; CI = 0.750; HI = 0.250; and RI = 0.826.

Fig. 4 in New albanerpetontid amphibians from the Early Cretaceous of Morocco and Middle Jurassic of England

Fig. 4. Teeth and frontals of Anoualerpeton priscus sp. nov.; Middle Jurassic (late Bathonian), Kirtlington, England. A–E. Close ups of teeth, all in lingual view. A. BMNH R.16365, right maxilla, crown of tooth at second locus from broken anterior end of bone or, when tooth row was complete, about one−fifth of distance posteriorly along row. B. BMNH R.16356, left dentary, crowns of adjacent teeth at fourth (B1) and fifth (B2) loci from broken anterior end of bone or, when tooth row was complete, about three−fifths of distance posteriorly along row. C. BMNH R.16477, right dentary, crown of tooth at eighth locus from broken anterior end of bone or, when tooth row was complete, about one−half of distance posteriorly along row. D. BMNH R.16357, right maxilla, crowns of teeth at seventh (D1) and ninth (D2) loci from broken anterior end of bone or, when tooth row was complete, about one−third of distance posteriorly along row. E. BMNH R.16340, right dentary, row of five teeth and one empty tooth slot, extending from second to seventh loci from broken anterior end of bone or, when tooth row was complete, about three−fifths of distance posteriorly along row. F–I. Frontals. F. BMNH R.14158, anterior one−third of fused frontals, broken posteriorly between slots for receipt of prefrontals, in dorsal (F1) and right lateral (F2) views. G. BMNH R.16342, posterior two−thirds of fused frontals, broken anteriorly between slots for receipt of prefrontals and missing posterior end of ventrolateral crests on both sides, in dorsal (G1) and ventral (G2) views. H. BMNH R.14159, posterior part of small, fused frontals, broken anteriorly between slot for receipt of prefrontals on right side and midway along orbital margin on left side and missing left posterior corner, in dorsal (H1) and ventral (H2) views. I. BMNH R.14160, fragment of large, left frontal, preserving orbital margin, in ventral view. Osteological abbreviations: ap, anterolateral process; as, anterior slot; gr, groove; lfu, line of fusion; ps, posterior slot; vlc, ventrolateral crest. Specimens at different scales.

opencc-by-4.0Nov 2019View details →

Text-fig. 8. Scanning electron microscope (SEM) images of spores from clumps of spores and sporangia with affinities to polypodiopsids (a–c) and of uncertain affinity (d–k); Torres Vedras locality, Portugal. a) Folded Cyathidites minor spores in proximal view showing trilete mark, from clump of spores; b) Cyathidites minor spores in proximal view showing trilete mark, from group of sporangia; c) Cyathidites australis spores in proximal view showing trilete mark, from group of sporangia; d–f) Linear group of spore masses (d; probable sporangial contents) composed of Taurocusporites segmentatus spores showing distal surface (e, middle) with concentric regions and proximal surface with segmented laesurae of elongated granules (e, right; f); in The Early Cretaceous Mesofossil Flora Of Torres Vedras (Ne Of Forte Da Forca), Portugal: A Palaeofloristic Analysis Of An Early Angiosperm Community

Text-fig. 8. Scanning electron microscope (SEM) images of spores from clumps of spores and sporangia with affinities to polypodiopsids (a–c) and of uncertain affinity (d–k); Torres Vedras locality, Portugal. a) Folded Cyathidites minor spores in proximal view showing trilete mark, from clump of spores; b) Cyathidites minor spores in proximal view showing trilete mark, from group of sporangia; c) Cyathidites australis spores in proximal view showing trilete mark, from group of sporangia; d–f) Linear group of spore masses (d; probable sporangial contents) composed of Taurocusporites segmentatus spores showing distal surface (e, middle) with concentric regions and proximal surface with segmented laesurae of elongated granules (e, right; f);

opencc-by-4.0Aug 2018View details →

Text-fig. 6. Reyispermum parvum gen. et sp. nov. seeds from the Early Cretaceous Vale de Água locality, Portugal (a, b, d, e: sample 141, c: sample 300); Synchrotron radiation X-ray tomographic microscopy (SRXTM, orthoslices). a) Longitudinal orthoslice (yz0563) through the median plane of the seed (holotype, S174178) showing the palisade-shaped cells of exotesta and collapsed inner parts of seed coat, raised exotestal tissue (arrow head) immediately adjacent to the lower edge of the hilum (hi), micropyle (mi) and remains of cellular nutritive tissue. b) Longitudinal orthoslice (xz0659) through the micropylar region perpendicular to the median plane showing the exotestal tissue surrounding the transverse micropyle slit (mi). c) Longitudinal orthoslice (yz0500) through the median plane of the seed (S175095) showing raised tissue (arrow head) immediately adjacent to the lower edge of the hilum (hi), micropyle (mi) and poorly preserved cells of the seed coat. d) Longitudinal orthoslice (xz0810) through middle part of seed perpendicular to the median plane (S174178) showing seed coat and remains of cellular nutritive tissue. e) Tangential and longitudinal orthoslice (xz0162) through the seed coat of holotype (S174178) showing thickened, undulate cell walls of exotesta (ex) and the short, thin-walled cells of tegmen (te) with a finely striate wrinkled surface. Scale bars = 250 µm (a, c, d); 125 µm (b, e). in Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal

Text-fig. 6. Reyispermum parvum gen. et sp. nov. seeds from the Early Cretaceous Vale de Água locality, Portugal (a, b, d, e: sample 141, c: sample 300); Synchrotron radiation X-ray tomographic microscopy (SRXTM, orthoslices). a) Longitudinal orthoslice (yz0563) through the median plane of the seed (holotype, S174178) showing the palisade-shaped cells of exotesta and collapsed inner parts of seed coat, raised exotestal tissue (arrow head) immediately adjacent to the lower edge of the hilum (hi), micropyle (mi) and remains of cellular nutritive tissue. b) Longitudinal orthoslice (xz0659) through the micropylar region perpendicular to the median plane showing the exotestal tissue surrounding the transverse micropyle slit (mi). c) Longitudinal orthoslice (yz0500) through the median plane of the seed (S175095) showing raised tissue (arrow head) immediately adjacent to the lower edge of the hilum (hi), micropyle (mi) and poorly preserved cells of the seed coat. d) Longitudinal orthoslice (xz0810) through middle part of seed perpendicular to the median plane (S174178) showing seed coat and remains of cellular nutritive tissue. e) Tangential and longitudinal orthoslice (xz0162) through the seed coat of holotype (S174178) showing thickened, undulate cell walls of exotesta (ex) and the short, thin-walled cells of tegmen (te) with a finely striate wrinkled surface. Scale bars = 250 µm (a, c, d); 125 µm (b, e).

opencc-by-4.0Aug 2018View details →

Text-fig. 9. Lusitanispermum choffatii gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, orthoslices). a) Longitudinal orthoslice (yz0769) through the median plane of the seed (S174345) showing expanded exotestal cells (ex, arrow head) in the hilar region and well-preserved cellular nutritive tissue with an embedded tiny embryo (asterisk markes the margin of the embryo); note well-developed mesotesta (me) on the raphal side of seed. b) Longitudinal orthoslice (yz0750) in the median plane showing detail of micropylar part of seed with well-preserved exotesta (ex) and mesotesta (me) and tiny embryo with two rudimentary cotyledons (asterisks mark the margin of the cotyledons); note numerous granular bodies in the cellular nutritive tissue that are probably the remains of protein and lipid bodies. c) Transverse orthoslice (xy0311) through seed below hilum showing the bulging exotesta (arrow heads) (S174472); note that the exotestal cells in this region have thinner walls (arrows). d) Transverse orthoslice (xy0900) through the middle of a seed showing the uneven thickening of the anticlinal walls of the exotestal cells (ex), which are thicker towards the outside and very thin towards the inside; note also mesotesta (me) and the well-preserved cellular nutritive tissue (S174472). Scale bars = 500 µm (a, d); 250 µm (b, c). in Extinct Taxa Of Exotestal Seeds Close To Austrobaileyales And Nymphaeales From The Early Cretaceous Of Portugal

Text-fig. 9. Lusitanispermum choffatii gen. et sp. nov. seeds from the Early Cretaceous Famalicão locality (sample 025), Portugal; Synchrotron radiation X-ray tomographic microscopy (SRXTM, orthoslices). a) Longitudinal orthoslice (yz0769) through the median plane of the seed (S174345) showing expanded exotestal cells (ex, arrow head) in the hilar region and well-preserved cellular nutritive tissue with an embedded tiny embryo (asterisk markes the margin of the embryo); note well-developed mesotesta (me) on the raphal side of seed. b) Longitudinal orthoslice (yz0750) in the median plane showing detail of micropylar part of seed with well-preserved exotesta (ex) and mesotesta (me) and tiny embryo with two rudimentary cotyledons (asterisks mark the margin of the cotyledons); note numerous granular bodies in the cellular nutritive tissue that are probably the remains of protein and lipid bodies. c) Transverse orthoslice (xy0311) through seed below hilum showing the bulging exotesta (arrow heads) (S174472); note that the exotestal cells in this region have thinner walls (arrows). d) Transverse orthoslice (xy0900) through the middle of a seed showing the uneven thickening of the anticlinal walls of the exotestal cells (ex), which are thicker towards the outside and very thin towards the inside; note also mesotesta (me) and the well-preserved cellular nutritive tissue (S174472). Scale bars = 500 µm (a, d); 250 µm (b, c).