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Fig. 4. – Trichomes. A-D in A synoptic revision of the Malagasy endemic genus Socratina Balle (Loranthaceae). Candollea 69: 65-73. In English, English and French abstracts.
Fig. 4. – Trichomes. A-D: Socratina phillipsoniana Callm. & Luino; E-G: S. bemarivensis (Lecomte) Balle; H-J: S. keraudreniana Balle. A, E, H. Trichomes from the outer surface of the corolla tube: side view; B, F, I. Trichomes from the outer surface of the corolla tube: cross section; C, G, J. Trichome from the inner surface of the corolla tube: side view; D: Trichome from villous fringe of the corolla tube: side view. [A-D: Luino & Ranaivoarisoa 63, G; E-G: Ratovoson 105, P; H-K: Rakotomalaza & Messmer 1816, G] [Drawings: S. Da-Giau]
Data from: A eudicot MIXTA family ancestor likely functioned in both conical cells and trichomes
<p>The <em>MIXTA</em> family of MYB transcription factors modulate the development of diverse epidermal features in land plants. This study investigates the evolutionary history and function of the <em>MIXTA </em>gene family in the early-diverging eudicot model lineage <em>Thalictrum </em>(Ranunculaceae), with R2R3 SBG9-A MYB transcription factors representative of the pre core-eudicot duplication and thus hereby referred to as "paleo<em>MIXTA</em>" (<em>PMX</em>).</p> <p>Cloning and phylogenetic analysis of <em>Thalictrum paleoMIXTA</em> (<em>ThPMX</em>) orthologs across 23 species reveals a genus-wide duplication coincident with a Whole Genome Duplication. Expression analysis by qPCR confirmed the highest expression is found in carpels, while newly revealing high expression in leaves and nuanced differences between paralogs in representative polyploid species. The single copy ortholog from the diploid species <em>T. thalictroides </em>(<em>TthPMX</em>, previously <em>TtMYBML2</em>),<em> </em>which has petaloid sepals with conical papillate cells and trichomes on leaves, was functionally characterized by virus induced gene silencing (VIGS) and its role in leaves was also assessed from heterologous over-expression in tobacco. Another ortholog from a species with conical papillate cells on stamen filaments, <em>TclPMX</em>, was also targeted for silencing. Overexpression assays in tobacco provide further evidence that the <em>paleoMIXTA</em> lineage has the potential for leaf trichome function in a core eudicot. Transcriptome analysis by RNA-Seq on leaves of VIGS-treated plants suggests<em> </em>that <em>TthPMX </em>modulates<em> </em>leaf trichome development and morphogenesis through microtubule-associated mechanisms and that this may be a conserved pathway for eudicots. These experiments provide evidence for a combined role for <em>paleoMIXTA</em> orthologs in (leaf) trichomes and (floral) conical papillate cells that, together with data from other systems, makes the functional reconstruction of a eudicot ancestor most likely as also having a combined function.</p>
Text-fig. 7. SEM (a) and SRXTM (b–e) images of Miranthus kvacekii sp. nov.; Mira locality, Portugal. a: Lateral view of flower bud showing corolla lobes extending beyond calyx; note surface of pedicel, calyx and corolla with small equiaxial epidermal cells and indumentum of densely spaced, short stiff trichomes. b, c: Longitudinal sections through floral bud in two directions perpendicular to each other (a, orthoslice yz1024; b, orthoslice xz0950) showing corolla (co), calyx (ca), stamens (st) and semi-inferior ovary with thin ovary wall (ow) and central mushroom-shaped globose placenta (pl) bearing numerous ovules (ov). d, e: Transverse sections through floral bud above placenta (d, orthoslice xy0915; e, orthoslice xy1095) showing calyx (ca), corolla (co), ovary wall (ow) and ovules (ov); yellow outlines indicate the positions of anthers (d) and filaments (e); orange outlines indicate the position of three of the possible staminodes. Specimen, Mira 100-S170157 (a–e, holotype). Scale bars = 600 µm (a–c), 300 µm (d, e). in Early Flowers Of Primuloid Ericales From The Late Cretaceous Of Portugal And Their Ecological And Phytogeographic Implications
Text-fig. 7. SEM (a) and SRXTM (b–e) images of Miranthus kvacekii sp. nov.; Mira locality, Portugal. a: Lateral view of flower bud showing corolla lobes extending beyond calyx; note surface of pedicel, calyx and corolla with small equiaxial epidermal cells and indumentum of densely spaced, short stiff trichomes. b, c: Longitudinal sections through floral bud in two directions perpendicular to each other (a, orthoslice yz1024; b, orthoslice xz0950) showing corolla (co), calyx (ca), stamens (st) and semi-inferior ovary with thin ovary wall (ow) and central mushroom-shaped globose placenta (pl) bearing numerous ovules (ov). d, e: Transverse sections through floral bud above placenta (d, orthoslice xy0915; e, orthoslice xy1095) showing calyx (ca), corolla (co), ovary wall (ow) and ovules (ov); yellow outlines indicate the positions of anthers (d) and filaments (e); orange outlines indicate the position of three of the possible staminodes. Specimen, Mira 100-S170157 (a–e, holotype). Scale bars = 600 µm (a–c), 300 µm (d, e).
Text-fig. 2. SEM images of Miranthus elegans gen. et sp. nov.; Mira locality, Portugal. a, b: Flowers in oblique lateral view showing remains of calyx and slightly semi-inferior ovary with elongated apical style (a); note larger openings in the floral tissue (asterisk) interpreted as schizogenous secretory cavities and the stomata-like secretory structures on the upper portion of the ovary (arrows) that are interpreted as nectariferous (b). c: Detail of ovary surface showing secretory stomata-like structures (arrows). d: Flower in lateral view showing fragmentary calyx and broken slightly semi-inferior ovary with secretory stomata-like structures; note the point of attachment of the central placenta (pl). e: Cluster of seeds removed from the ovary in (d) showing reticulate surface. f: Outer (abaxial) surface of calyx lobe showing the slightly pointed papillae and scattered, fine trichomes (arrows). g: Triaperturate pollen grains from the ovary surface. Specimens, Mira 100-S153146 (a, b), Mira 100-S170155 (c), Mira 100-S101266 (d, e), Mira 105-S100732 (f), Mira 100-S170125 (g). Scale bars = 600 µm (a, b, d), 300 µm (f), 100 µm (c, e), 10 µm (g). in Early Flowers Of Primuloid Ericales From The Late Cretaceous Of Portugal And Their Ecological And Phytogeographic Implications
Text-fig. 2. SEM images of Miranthus elegans gen. et sp. nov.; Mira locality, Portugal. a, b: Flowers in oblique lateral view showing remains of calyx and slightly semi-inferior ovary with elongated apical style (a); note larger openings in the floral tissue (asterisk) interpreted as schizogenous secretory cavities and the stomata-like secretory structures on the upper portion of the ovary (arrows) that are interpreted as nectariferous (b). c: Detail of ovary surface showing secretory stomata-like structures (arrows). d: Flower in lateral view showing fragmentary calyx and broken slightly semi-inferior ovary with secretory stomata-like structures; note the point of attachment of the central placenta (pl). e: Cluster of seeds removed from the ovary in (d) showing reticulate surface. f: Outer (abaxial) surface of calyx lobe showing the slightly pointed papillae and scattered, fine trichomes (arrows). g: Triaperturate pollen grains from the ovary surface. Specimens, Mira 100-S153146 (a, b), Mira 100-S170155 (c), Mira 100-S101266 (d, e), Mira 105-S100732 (f), Mira 100-S170125 (g). Scale bars = 600 µm (a, b, d), 300 µm (f), 100 µm (c, e), 10 µm (g).
Text-fig. 2. Salicaceae (a–g), Cannabaceae (h–n), cf. Betulaceae (o–r). a–g: Saxifragispermum, USNM PAL 772341. Scale bar = 5 mm except as indicated. a–b: Lateral, c: apical, and d: basal views of fruit, reflected light, palladium coated; apex at top of (a, b). e: Equatorial transverse section reflected light; arrows indicate presumed seeds, scale bar = 2 mm. f: Detail of locule contents extracted from (e), transmitted light, scale bar = 200 Μm. g: Interwoven trichomes or fibers from locule, transmitted light, scale bar = 5 Μm. h–j: Celtis. h, i: USNM PAL 772342, reflected light, palladium coated, scale bar = 5 mm. h: Lateral view parallel with plane of dehiscence. i: Lateral view perpendicular to plane of dehiscence. j: DMNH EPI.47809, Celtis in lateral view; showing reticulate sculpture and the vertically-oriented, plane of dehiscence (arrow), scale bar = 5 mm. k–m: Aphananthe. USNM PAL 772344, reflected light, palladium coated, scale bar = 5 mm. k: Apical view, note triangular cross section and apical plug (arrow). l: Lateral view, apex up. m: Lateral view at 90° to (l). n: Detail of cellular pattern at surface of endocarp, scale bar = 0.5 mm. o–r: in The Early Middle Eocene Wagon Bed Carpoflora Of Central Wyoming, U.S.A.
Text-fig. 2. Salicaceae (a–g), Cannabaceae (h–n), cf. Betulaceae (o–r). a–g: Saxifragispermum, USNM PAL 772341. Scale bar = 5 mm except as indicated. a–b: Lateral, c: apical, and d: basal views of fruit, reflected light, palladium coated; apex at top of (a, b). e: Equatorial transverse section reflected light; arrows indicate presumed seeds, scale bar = 2 mm. f: Detail of locule contents extracted from (e), transmitted light, scale bar = 200 Μm. g: Interwoven trichomes or fibers from locule, transmitted light, scale bar = 5 Μm. h–j: Celtis. h, i: USNM PAL 772342, reflected light, palladium coated, scale bar = 5 mm. h: Lateral view parallel with plane of dehiscence. i: Lateral view perpendicular to plane of dehiscence. j: DMNH EPI.47809, Celtis in lateral view; showing reticulate sculpture and the vertically-oriented, plane of dehiscence (arrow), scale bar = 5 mm. k–m: Aphananthe. USNM PAL 772344, reflected light, palladium coated, scale bar = 5 mm. k: Apical view, note triangular cross section and apical plug (arrow). l: Lateral view, apex up. m: Lateral view at 90° to (l). n: Detail of cellular pattern at surface of endocarp, scale bar = 0.5 mm. o–r:
FIG. 6 in Diversity and taxonomic implications of glands and trichomes in the genus Matthiola W.T.Aiton (Anchonieae; Brassicaceae) in the Flora Iranica area
FIG. 6. — Line drawings of trichomes types in Matthiola W.T.Aiton: A, M. afghanica; B, M. farinosa; C, M. dumulosa; D, M. spathulata; E, M. revoluta; F, M. longipetala; G, M. chenopodiifolia. Scale bar: 90 µm.
FIG. 2 in Diversity and taxonomic implications of glands and trichomes in the genus Matthiola W.T.Aiton (Anchonieae; Brassicaceae) in the Flora Iranica area
FIG. 2. — Indumentum diversity in Matthiola W.T.Aiton, leaf: A, M. chenopodiifolia Fisch. & C.A.Mey.; B, M. flavida Boiss.; C, M. codringtonii Rech.f.; D, M. chenopodiifolia Fisch. & C.A.Mey. (same in leaf and stem of M. tomentosa Bél., M. farinosa Bunge, M. afghanica Rech.f. & KÖie); E, M. shiraziana Zeraatkar, Khosravi, F.Ghahrem., Al-Shehbaz & Assadi; F, M. longipetala (Vent.) DC.; G, M. alyssifolia (DC.) Bornm.. Scale bars: 500 µm. The arrows show glands.
FIG. 5. — A-D in Diversity and taxonomic implications of glands and trichomes in the genus Matthiola W.T.Aiton (Anchonieae; Brassicaceae) in the Flora Iranica area
FIG. 5. — A-D, Matthiola alyssifolia (DC.) Bornm.: A, D, abaxial side of leaf; B, cataphylls covered by simple and 2-4-rayed trichomes; C, adaxial side of leaf; E, M. revoluta Bunge, abaxial side of leaf. Scale bars: A, C, D, 500 µm; B, 1 cm; E, 20 µm. The arrow shows 2-4-rayed and simple trichomes (C).
FIG. 1 in Diversity and taxonomic implications of glands and trichomes in the genus Matthiola W.T.Aiton (Anchonieae; Brassicaceae) in the Flora Iranica area
FIG. 1. — SEM images of leaf indumentum of Matthiola W.T.Aiton: A, M. dumulosa Boiss. & Buhse; B, M. longipetala (Vent.) DC. (same in M. incana (L.) W.T.Aiton); C, M. revoluta Bunge; D, M. afghanica Rech.f. & KÖie; E, M. flavida Boiss. (same in M. shiraziana Zeraatkar, Khosravi, F.Ghahrem., Al-Shehbaz & Assadi, M. tomentosa Bél.); F, M. ghorana Rech.f. (same in M. graminea Rech.f.); G, M. spathulata Conti; H, M. farinosa Bunge. Scale bars: 90 µm.
FIG. 4 in Diversity and taxonomic implications of glands and trichomes in the genus Matthiola W.T.Aiton (Anchonieae; Brassicaceae) in the Flora Iranica area
FIG. 4. — SEM image of petiolar leaf base Indumentum in Matthiola W.T.Aiton: A, M. spathulata Conti, pedicel base; B, M. tomentosa Bél. (same in M. codringtonii Rech.f.); C, M. revoluta Bunge (same in M. chenopodiifolia Fisch. & C.A.Mey., M. graminea Rech.f., M. ghorana Rech.f., M. macranica Rech.f.); D, M. farinosa Bunge (same in all the species except for M. alyssifolia (DC.) Bornm. and M. chenopodiifolia Fisch. & C.A.Mey. that are glabrous and lacking of 2-4-rayed trichomes, respectively). Scale bars: A, D, 1 mm; B, D, 500 µm. The arrows show 2-4-rayed (B).
FIG. 3 in Diversity and taxonomic implications of glands and trichomes in the genus Matthiola W.T.Aiton (Anchonieae; Brassicaceae) in the Flora Iranica area
FIG. 3. — SEM images of inner sepal indumentum in Matthiola W.T.Aiton: A, M. chenopodiifolia Fisch. & C.A.Mey.; B, M. alyssifolia (DC.) Bornm. (same in inner sepal); C, M. chenopodiifolia Fisch. & C.A.Mey.; D, M. tomentosa Bél., outer sepal indumentum; E, M. longipetala (Vent.) DC.; F, M. tomentosa Bél.. Scale bars: 500 µm. The arrows show 2-4-rayed (C, E, F).
◂Fig. 3 Gynoecium of C. crenata %yellow frames), C. cf. grandicalyx %blue frames) and C. sinensis %pink frames; A, B stack shot images; C–K light microscopy; G polarised light; TS in horizontal orientation). A, B Anthetic female flower, calyx and corolla partly removed. B LS of gynoecium. C LS of functionally female flower %note strongly stained peripheral tissue of corolla, anther and gynoecium). D LS of gynoecium. E, F TS of functionally female flower %note strongly stained, peripheral tissue). G TS of functionally female flower %note crystal deposition). H LS of ovule %note stalked embryo sac). J TS of functionally male flower with non-functional ovules. K LS of functionally male flower %style lacking, original position indicated by an asterisk) %LS, longisection; TS, transverse section; a,anther; bs, basal septum; c, calyx; car, carpel; co, corolla; db, dorsal bundles; es, embryo sac; fs, false septum; lb, lateral bundles; o, ovule; stg, stigma; sty, style; t, trichomes; tt, transmission tissue; ut, peripheral, strongly stained tissue; vb, ventral bundles; vs, ventral slit) in Observations on flower and fruit anatomy in dioecious species of Cordia (Cordiaceae, Boraginales) with evolutionary interpretations
◂Fig. 3 Gynoecium of C. crenata %yellow frames), C. cf. grandicalyx %blue frames) and C. sinensis %pink frames; A, B stack shot images; C–K light microscopy; G polarised light; TS in horizontal orientation). A, B Anthetic female flower, calyx and corolla partly removed. B LS of gynoecium. C LS of functionally female flower %note strongly stained peripheral tissue of corolla, anther and gynoecium). D LS of gynoecium. E, F TS of functionally female flower %note strongly stained, peripheral tissue). G TS of functionally female flower %note crystal deposition). H LS of ovule %note stalked embryo sac). J TS of functionally male flower with non-functional ovules. K LS of functionally male flower %style lacking, original position indicated by an asterisk) %LS, longisection; TS, transverse section; a,anther; bs, basal septum; c, calyx; car, carpel; co, corolla; db, dorsal bundles; es, embryo sac; fs, false septum; lb, lateral bundles; o, ovule; stg, stigma; sty, style; t, trichomes; tt, transmission tissue; ut, peripheral, strongly stained tissue; vb, ventral bundles; vs, ventral slit)
Text-fig. Fig. 9. Cucurbitaceae 1–4. Cucurbitaciphyllum lobatum (KNOWLTON) comb. nov. Specimens from Shirley Canal, Montana, USGS loc. 8519. 1. Trilobate leaf, with rounded lobal sinues, and entire to serrated margin. USNM 313167. 2. Leaf with pronounced secondary lobes and cordate base, USNM 313179. 3. Detail of central lobe from fig. 1. 4. Higher magnification, showing abundant trichome impressions. Scales = 3 cm in 1–3; 3 mm in 4. in Revisions To Roland Brown'S North American Paleocene Flora
Text-fig. Fig. 9. Cucurbitaceae 1–4. Cucurbitaciphyllum lobatum (KNOWLTON) comb. nov. Specimens from Shirley Canal, Montana, USGS loc. 8519. 1. Trilobate leaf, with rounded lobal sinues, and entire to serrated margin. USNM 313167. 2. Leaf with pronounced secondary lobes and cordate base, USNM 313179. 3. Detail of central lobe from fig. 1. 4. Higher magnification, showing abundant trichome impressions. Scales = 3 cm in 1–3; 3 mm in 4.
FIG. 5 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 5. — Light microscope images illustrating different trichome types on leaves and bracts (abaxial surface) of different taxa of Acanthopsis: A. Bract,A. hoffmannseggiana typical form,Type C, G (Steyn 2148); B, Leaf,A. hoffmannseggiana typical form, Type G (Steyn 2148); C, Bract,A. hoffmannseggiana typical form, Type G (Steyn 2148); D, Bract,A. hoffmannseggiana typical form, Type C (Steyn 2148); E, Bract, A. hoffmannseggiana typical form, Type E (Steyn 2148); F, Leaf, A. scullyi, Type C (Steyn 2134); G, Leaf, A. hoffmannseggiana typical form, Type B (Steyn 2148); H, Leaf, A. disperma Type B (Steyn 1852). Scale bars: A, 100 µm; B, C, F, H, 50 µm; D, E, G, 20 µm.
FIG. 4 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 4. — Light microscope images illustrating different trichome types on leaves (abaxial surface) of different taxa of Acanthopsis: A, A. horrida, Type A1, E,F (Steyn 2121); B, C, A. glauca, Type A2 (Steyn 2143); D, A. dispermoides, Type A1, B (Steyn 1912); E, A. scullyi, Type D (Steyn 2134). Scale bars: A, 100 µm; B, C, 20 µm; D, E, 50 µm.
FIG. 3 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 3. — SEM images of bract indumentum (abaxial surface) and predominant trichome types of different taxa of Acanthopsis: A, A. disperma, Type E on blade, Type C on margin (Koekemoer 4187); B, A. horrida, Type F (Steyn 2121); C, A. hoffmannseggiana typical form, Type G (Steyn 1895); D, A. pagodiformis, Type C (Steyn 2147); E, A. glandulopalmata, Type A (Steyn 2125); F, A. scullyi, Type D (Steyn 2139). Scale bars: 100 µm.
FIG. 2 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 2. — SEM images of leaf indumentum and predominant trichome types of various taxa of Acanthopsis: A, A. dregeana subsp. longispina, Type A2 (Steyn 2141); B, A. hoffmannseggiana typical form, Type A1 (Steyn 758); C, A. disperma, Type B (Steyn 1845); D, A. horrida, Type F (Steyn 2121); E, A. villosa, Type D (Koekemoer 4398); F, A. nitida, Type A1 (Steyn 1884). Scale bars: A, B, D, 100 µm; C, E, F, 20 µm.
FIG. 1 in Taxonomic significance of trichomes in the genus Acanthopsis Harv. (Acanthaceae, tribe Acantheae)
FIG. 1. — Trichome types (A1-G; illustrations labelled accordingly) found in Acanthopsis; as seen in surface view,unless indicated otherwise.A1 (bottom), non-glandular, unicellular trichome, A. glandulopalmata, leaf (Steyn 2125); A1 (top), optical section, A. horrida, leaf (Steyn 2121); A2, non-glandular, unicellular trichome, A. dregeana subsp. longispina, leaf (Steyn 2141); B, non-glandular, multicellular trichome, A. hoffmannseggiana Pofadder form, leaf (Steyn 1908); C, optical section, non-glandular, unicellular trichome,A. disperma, bract (Steyn 1845); D, non-glandular, multicellular trichome,A. villosa, leaf (Koekemoer 4398); E, glandular,uni- or multicellular trichome with or without 1-celled stalk, A. glandulopalmata, leaf (Steyn 2125); F, glandular, multicellular trichome with 2 (or 3)-celled stalk, A. glandulopalmata, leaf (Steyn 2125); G, glandular, multicellular trichome with 3-celled stalk and viscid head, A. hoffmannseggiana typical form, bract (Steyn 1915). Scale bar: 50 µm. Artist: Elizma Fouché.
Text-fig. 48. Scanning electron microscope (SEM, a, b, d–i) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c) images of "One-seeded fruit sp. 2" (a–c), "Unassigned, unnamed fruits" (d–f), Pazliopsis sp. (g, h) and "Follicular fruit with exotestal seeds" (i); Catefica locality, Portugal. a) Lateral view of fruit showing remains of tepals (te) and a single stamen (st); b) Detail of fruit surface showing short, scale-like, peltate trichomes (arrows); c) Transverse section (orthoslice xy0475) of fruit containing a single seed showing tepals (te) and fruit surface with peltate trichomes (arrow); note partial preservation of internal nutritive tissue; d) Fruit in lateral view showing the almost smooth epidermis with scattered openings; e) Detail of fruit surface from (d) showing the scattered openings in the epidermis interpreted as burst secretory cells (arrows); f) Dorsi-ventral view of tiny fruit with an irregular surface; g) Lateral view of exotestal seed assigned to cf. Pazliopsis sp.; h) Detail of fruit surface of seed in (g) showing faint facets of outer palisade layer with fine jigsaw-puzzle outlines of the anticlinal walls; i) Lateral view of fragmentary follicular fruit showing two exposed exotestal seeds. Specimens, Catefica 153-S174314 (a–c), Catefica 50-S170420 (d, e), Catefica 152-S174300 (f), Catefica 49-S172319 (g, h), Catefica MM158-P0272 (i). Scale bars = 300 Μm (a, c, d, f, g, i), 100 Μm (e), 50 Μm (b, h). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 48. Scanning electron microscope (SEM, a, b, d–i) and synchrotron radiation X-ray tomographic microscopy (SRXTM, c) images of "One-seeded fruit sp. 2" (a–c), "Unassigned, unnamed fruits" (d–f), Pazliopsis sp. (g, h) and "Follicular fruit with exotestal seeds" (i); Catefica locality, Portugal. a) Lateral view of fruit showing remains of tepals (te) and a single stamen (st); b) Detail of fruit surface showing short, scale-like, peltate trichomes (arrows); c) Transverse section (orthoslice xy0475) of fruit containing a single seed showing tepals (te) and fruit surface with peltate trichomes (arrow); note partial preservation of internal nutritive tissue; d) Fruit in lateral view showing the almost smooth epidermis with scattered openings; e) Detail of fruit surface from (d) showing the scattered openings in the epidermis interpreted as burst secretory cells (arrows); f) Dorsi-ventral view of tiny fruit with an irregular surface; g) Lateral view of exotestal seed assigned to cf. Pazliopsis sp.; h) Detail of fruit surface of seed in (g) showing faint facets of outer palisade layer with fine jigsaw-puzzle outlines of the anticlinal walls; i) Lateral view of fragmentary follicular fruit showing two exposed exotestal seeds. Specimens, Catefica 153-S174314 (a–c), Catefica 50-S170420 (d, e), Catefica 152-S174300 (f), Catefica 49-S172319 (g, h), Catefica MM158-P0272 (i). Scale bars = 300 Μm (a, c, d, f, g, i), 100 Μm (e), 50 Μm (b, h).
Text-fig. 6. Taimyria triassica NAUGOLNYKH et MOGUTCHEVA gen. et sp. nov., holotype 4287/6. Epidermal-cuticular structure of upper surface of seed-bearing capsule. a–c, e–g: cuticles of upper surface of seed-bearing capsule, b – detail of (a), notice small white spot at picture center, which could be interpreted as scar of small monocellular trichome; d: conducting strand going to seed scar. Locality: Tsvetkov Cape; Lower Triassic, Induan; Keshin Formation. Scale bar 200 µm (a, c, d, g), 100 µm (e, f). in Taimyria Gen. Nov., A New Genus Of Evolutionary Advanced Gymnosperms From Triassic Of The Taimyr Peninsula, Siberia, Russia
Text-fig. 6. Taimyria triassica NAUGOLNYKH et MOGUTCHEVA gen. et sp. nov., holotype 4287/6. Epidermal-cuticular structure of upper surface of seed-bearing capsule. a–c, e–g: cuticles of upper surface of seed-bearing capsule, b – detail of (a), notice small white spot at picture center, which could be interpreted as scar of small monocellular trichome; d: conducting strand going to seed scar. Locality: Tsvetkov Cape; Lower Triassic, Induan; Keshin Formation. Scale bar 200 µm (a, c, d, g), 100 µm (e, f).
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