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47 results for “Entogoniopsis”
FIGURES 125–127 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 125–127. Light micrographs showing the range of morphological variation in Entogoniopsis squamatoportulata. Figs 125–126: SZCZ22057, DSDP sample 29-281-16CC, South Tasman Rise, Southwest Pacific Ocean. Fig. 127: SZCZ21078, holotype, DSDP sample 29-281-16-3, 75–77 cm, South Tasman Rise, Southwest Pacific Ocean.
FIGURES 223–229 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 223–229. Light micrographs showing the range of morphological variation in Trilamina nitescens. Fig. 223: BM63659, Joe's River, Barbadoes. Fig. 224: BM coll. Adams TS694, frustule, Oamaru, New Zealand. Fig. 225: BM63658, Oamaru, New Zealand. Figs 226–227: BM coll. Adams GC3332, Oamaru, New Zealand. Fig. 228: BM3198, Cambridge, Barbadoes, holotype. Fig. 229: BM61164, Oamaru, New Zealand.
FIGURES 185–192 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 185–192. Light micrographs showing the range of morphological variation in Entogoniopsis foveata. Fig. 185: BM68637, Joe's River, Barbadoes (labelled as 'T. lobato-gemmatum'). Fig. 186: BM63574, Joe's River, Barbadoes. Fig. 187: BM61082, Chalky Mount, Barbadoes. Fig. 188: BM3072, Cambridge, Barbadoes, T. foveatum, holotype. Fig. 189: BM66525, Chalky Mount, Barbadoes. Fig. 190: BM37839, Springfield, Barbadoes. Fig. 191: BM coll. Adams TS266, Barbadoes. Fig. 192: BM3044, Barbadoes, T. picturatum, holotype.
FIGURES 149–154 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 149–154. Scanning electron micrographs of Entogoniopsis stokesiana from Pôtor (formerly Szent-Péter), Slovakia (Figs 149, 153–154) and Szurdokpüspöki ('Castel'), Hungary (150–152). Fig. 149: Oblique external view, showing a trifolium in the centre of the valve face. The central ring of rimoportulae is indicated with an arrowhead. Note the deep, stepped mantle (arrow). Fig. 150: Oblique internal view of a valve with four internal costae per side. Note that the more prominent costae are associated with the edges of the trifolium (arrows). The location of the rimoportulae is indicated with an arrowhead. Fig. 151: Detail of the central area, showing the external tubes of the rimoportulae bearing thickened rims, and granules scattered on the valve face (arrow). Note the well-preserved slightly sunken cribra, and the diminished size of areolae next to the rimoportulae. Fig. 152: Detail of the specimen in Fig. 150, showing the internal openings of the rimoportulae, in the form of a slit between slightly raised lips. Note the smaller areolae located next to the rimoportulae, and the well-preserved cribra. Fig. 153: Detail of a pseudocellus. Fig. 154: Oblique external view of a specimen with a detached girdle element, probably a copula (C?).
FIGURES 120–124 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 120–124. Scanning electron micrographs of Entogoniopsis squamatoportulata from Vema Cruise 17, Core 107, South Atlantic Ocean. Fig. 120: Internal valve view, showing the location of the central ring of 17 rimoportulae (arrow). Fig. 121: Detail of the specimen in Fig. 120, showing the internal openings of the rimoportulae in the form of short slits across slightly raised papillae. Fig. 122: Oblique internal view, showing the depressed centre of the valve face, and the complex pattern of internal costae in the marginal part of the valve face and on the mantle. Fig. 123: Detail of the prominent pseudocellus. Note the well-preserved volae within the areolae. Fig. 124: Detail of the pattern formed by the internal costae. Note the inwardly expanded, smooth hyaline margin of the mantle (arrow).
FIGURES 117–119 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 117–119. Reproductions of original line drawings from Pantocsek (1889). Fig. 117: Entogonia tschestnovii Pantocsek (1889: pl. II, fig. 24). Fig. 118: Triceratium squamatum Pantocsek (1889: pl. IX, fig. 164). Fig. 119: Entogonia truanii Pantocsek (1889: pl. XIII, fig. 223). Relative scale retained.
FIGURES 114–116 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 114–116. Light micrographs showing the range of morphological variation in Entogoniopsis squamata. Fig. 114: BM coll. Adams H335, Kusnetzk, Russia. Fig. 115: BM coll. Adams GC3416, Barbadoes. Fig. 116: BM101699, dredging DODO-123-D1, Mascarene Ridge, Indian Ocean.
FIGURES 108–113 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 108–113. Scanning electron micrographs of Entogoniopsis squamata from dredging DODO-123-D1, Mascarene Ridge, Indian Ocean. Fig. 108: Oblique external view, showing the conspicuously depressed valve face. Note the rows of areolae on the mantle becoming slightly divergent closer to the poles. Fig. 109: Oblique internal view, showing the depressed valve face and rows of marginal internal costae. Note the sparser areolation within the central area (arrow). Fig. 110: Valve (V) with attached valvocopula (VC) in girdle view. Note the hyaline marginal ridge level with the summits of the polar elevations (arrow). Fig. 111: Detail of the specimen in Fig. 109, showing the pattern of loops ('scales' in Pantocsek's description) formed by the internal costae, and the inwardly expanded hyaline mantle margin. Fig. 112: Oblique internal view of the specimen in Fig. 110, showing the valvocopula attached to the valve by means of clasping devices embracing the internal costae (arrow). Fig. 113: Detail of the specimen in Fig. 110, showing arrowhead-shaped clasping devices.
FIGURES 94–96 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 94–96. Light micrographs showing the range of morphological variation in Entogoniopsis inflata. Fig. 94: BM2873, Cambridge, Barbadoes, holotype; Fig. 95: SZCZ17945B, ODP sample 171B-1051A-8H-5, 36–37 cm, Blake Nose, western North Atlantic Ocean; Fig. 96: Academy of Natural Sciences of Philadelphia slide SchAR3460, Barbadoes, holotype of Biddulphia inflata var. recta Boyer. Micrograph by Jonathan English.
FIGURES 102–107 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 102–107. Light micrographs showing the range of morphological variation in Entogoniopsis major. Fig. 102: BM coll. Adams G614, Allan's Farm, Oamaru, New Zealand. Fig. 103: BM37916, Forrester's, Oamaru, New Zealand. Fig. 104: BM coll. Adams G89, Allan's Farm, Oamaru, New Zealand. Fig. 105: BM46554, Oamaru, New Zealand, holotype. Fig. 106: BM37914, Forrester's, Oamaru, New Zealand. Fig. 107: BM coll. Adams G28, Oamaru, New Zealand.
FIGURES 97–101 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 97–101. Scanning electron micrographs of Entogoniopsis major from Oamaru, New Zealand. Fig. 97: Oblique external view of a hypovalve with a displaced epicingulum element (C? = copula?). Note the thickenings on the depressed part of the valve face. Fig. 98: Detail of the specimen in Fig. 99, showing poorly preserved clasping devices of the valvocopula attached to the internal costae. Fig. 99: Oblique internal view of a specimen with remnants of the valvocopula attached (arrow). Fig. 100: Girdle view of a specimen with a valvocopula attached (VC). Fig. 101: Oblique internal view of the specimen in Fig. 100, revealing well-preserved clasping devices embracing the internal costae (arrow), and a fossa holding the inward expansion of the mantle margin (arrowhead).
FIGURES 52–57 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 52–57. Scanning electron micrographs of Entogoniopsis venosa from Joe's River, Barbadoes (Figs 52, 54, 56), and Oamaru, New Zealand (Figs 53, 55, 57). Fig. 52: Oblique external view, central rimoportula indicated by arrow. Fig. 53: Oblique internal view. Note the internal opening of the rimoportula indicated by arrow. Fig. 54: Detail of the specimen in Fig. 52, showing a small depression around the fractured external tube of the rimoportula. Fig. 55: Detail of the specimen in Fig. 53, showing the internal opening of the rimoportula in the form of a slightly raised slit. Note the prominent costae radiating from the rimoportula. Fig. 56: Detail of the specimen in Fig. 52, showing the hyaline marginal ridge, and the mantle, with external thickenings on the part adjacent to the valve face, associated with the internal costae (arrows). Fig. 57: Detail of the specimen in Fig. 53, showing the internal costae and the hyaline mantle margin, with a slight inward expansion.
FIGURES 69–75 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 69–75. Scanning electron micrographs of Entogoniopsis novazealandica from Oamaru, New Zealand. Fig. 69: Oblique external view, showing the depressed valve face centre. Fig. 70: Detail of a hemispherical pseudocellus. Fig. 71: Oblique internal view of the specimen in Fig. 69. Note the absence of rimoportulae within the central depression. Arrow indicates a transverse costa next to the proximal side of a polar elevation. Fig. 72: Oblique external view of a specimen with a circumferential raised sector adjacent to the central depression. Fig. 73: Girdle view of a specimen with highly elevated polar pseudocelli. Note the offset of the polar elevations from the valve margin. Fig. 74: Oblique view of a specimen with attached valvocopula. Note clasping devices indicated by arrows. Fig. 75: Detail of the valvocopula attachment, with two clasping devices embracing internal costae visible. Arrow indicates the fossa, attached to the inwardly expanded hyaline margin of the mantle.
FIGURES 82–86 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 82–86. Triceratium dobreeanum Norman ex Greville versus Triceratium dobreeanum var. novazealandica Grove & Sturt. Figs 82–83: Line drawings of Triceratium dobreeanum Norman ex Greville, reproduced from Greville (1865a: pl. II, Figs 23–24). Fig. 84: Light micrograph of T. dobreeanum holotype, BM3340, dredging off Sydney, Australia. Figs 85–86: Line drawings of Triceratium dobreeanum var. novazealandica, reproduced from Grove & Sturt (1886: pl. XIX, Figs 17–18); note the lack of linking spines at the summits of the polar elevations. Reproductions are not to scale.
FIGURES 50–51. Fig. 50 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 50–51. Fig. 50: Reproduction of the line drawing of Entogonia saratoviana from Pantocsek (1889: pl. VI, fig. 105), not to scale. Fig. 51: Light micrograph of Triceratium reedii (Reed) Desikachary & Sreelatha, holotype, Forrester's, Oamaru, New Zealand, slide CHR617491 (coll. Allan Herbarium, Landcare Research, New Zealand).
FIGURES 11–16 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 11–16. Scanning electron micrographs of Entogoniopsis morlandii from Oamaru, New Zealand (Figs 11, 13, 15–16), and Vema Cruise 17, Core 107, South Atlantic Ocean (Figs 12, 14). Fig. 11: Oblique external view, showing a depressed valve face surrounded by a hyaline marginal ridge level with the summits of the polar pseudocelli. Central ring of rimoportulae indicated by arrowhead. Areas of sparse, scattered areolation next to the proximal sides of polar elevations are indicated with arrows. Fig. 12: Oblique internal view showing the prominent internal costae. Central ring of rimoportulae indicated by arrowhead. Fig. 13: Detail of the specimen in Fig. 11, showing fractured buttressed external tubes of the rimoportulae, and partially dissolved volae. Fig. 14: Detail of the specimen in Fig. 12, showing an irregular central ring of rimoportulae, internal openings in the form of slightly raised slits. Fig. 15: Detail of the specimen in Fig. 11, showing one of the polar pseudocelli. Note the flat summit occupying the whole of the pseudocellus located on the valve face. Fig. 16: Detail of a fractured valve revealing a T-shaped cross-section through a costa (arrowhead), and an inward expansion of the hyaline mantle margin (arrow).
FIGURES 31–36 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 31–36. Light micrographs showing the range of morphological variation in Entogoniopsis grunowii (Figs 31, 33–36) in comparison to Entogonia davyana (Greville) Greville (Fig. 32). Fig. 31: BM coll. Adams TS426, Allan's Farm, Oamaru, New Zealand; Fig. 32: BM63959, Joe's River, Barbadoes. Fig. 33: SZCZ15073, DSDP sample 29-281-16CC, South Tasman Rise. Fig. 34: BM46607, Oamaru, New Zealand, holotype. Fig. 35: BM coll. Adams G68, Railway Cutting 1, Oamaru, New Zealand. Fig. 36: BM63654, Oamaru, New Zealand.
FIGURES 6–9 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 6–9. An overview of valve morphology in Sheshukovia Gleser and Medlinia Sims. Figs 6–7: Sheshukovia kolbei (Hustedt) Gleser. Fig. 6: Oblique external view showing flat polar pseudocelli, shallow transverse folds across the projections, and an inconspicuous external tube of a rimoportula (arrow). Fig. 7: Oblique internal view. Note the openings of the rimoportulae (arrows), and the smooth hyaline margin of the mantle (arrowhead). Fig. 8: Medlinia weissei (Grunow) Sims, external valve view, showing deep transverse folds separating the projections from the central area, and prominent external tubes of the rimoportulae (arrow). Fig. 9: Medlinia venusta (Witt) Sims, oblique internal view, showing internal costae associated with the transverse folds, internal openings of the rimoportulae (arrow), as well as serrations along the mantle margin (arrowhead).
FIGURES 76–81 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 76–81. Light micrographs showing the range of morphological variation in Entogoniopsis novazealandica. Fig. 76: BM63524, Oamaru, New Zealand. Fig. 77: BM71533, Oamaru, New Zealand, lectotype; Fig. 78: BM46607, Oamaru, New Zealand. Fig. 79: BM coll. Adams G116, Jackson's Paddock, Oamaru, New Zealand. Fig. 80: BM coll. Adams G659, labelled '(J.G.) Oamaru, New Zealand'. Fig. 81: BM46575, Oamaru, New Zealand.
FIGURES 58–68 in Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser
FIGURES 58–68. Light micrographs showing the range of morphological variation in Entogoniopsis venosa. Fig. 58: BM63792, Joe's River, Barbadoes. Fig. 59: BM35040, Barbadoes. Fig. 60: BM68793, Barbadoes. Fig. 61: BM63791, Newcastle, Barbadoes. Fig. 62: BM coll. Adams TS856, Joe's River, Barbadoes. Fig. 63: BM11107, Oamaru, New Zealand. Fig. 64: BM68793, Oamaru. Fig. 65: BM coll. Adams TS315, Oamaru. Arrow indicates a missing segment within a costa. Fig. 66: BM68793, Barbadoes. Fig. 67: BM38108, Springfield, Barbadoes. Fig. 68: ODP sample 171B-1050A-2H-2, 33–34 cm, Blake Nose, western North Atlantic Ocean.
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