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31 results for “Gomphoneis”
PLATE 2 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 2: LM. Figs 18–31: Gomphoneis parahastata sp. nov. Figs 32–39: G. lata. Scale bar = 10 µm for all figures.
PLATE 14 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 14: SEM. Gomphoneis metzeltinii. Figs 389–391: Extenal valve views. Figs 389, 390: Whole valve views should fine striae and indistinct stigmoids. Proximal raphe ends are dilated slightly. Fig. 391. Footpole shows the rounded porelli of the apical pore field appear as condensed striae. G. capitata. Figs 392–396: Figs 392–395: Internal valve views. Figs 392–394: Entire valve views. Fig. 392: Specimen with girdle bands shows septa at the poles, wide, rectangular central area and central nodule with recurved proximal raphe ends. Fig. 393: Specimen lacking girdle bands revealing the smaller pseudosepta at the poles. The helictoglossae are evident also. Only two stigmoid openings are evident around the central nodule. Fig. 394: Specimen without girdle bands, showing pseudosepta, recurved proximal raphe ends on small central nodule, and helictoglossae at the poles. Fig. 395: Internal valve view showing only two prominent stigmoidal opening. The appear simple, without occlusions. Fig. 396: External valve view. The valve has proximal raphe ends that are prominently dilated, and has 2 types of stigmoidal openings, one larger and one smaller.
PLATE 1 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 1: LM. Figs 1–11: Gomphoneis hastata. Figs 12–17: G. parahastata sp. nov. Fig. 15 is of the holotype. Scale bar = 10 µm for all figures.
PLATE 4 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 4: LM. Figs 61–84: Gomphoneis eriensioides sp. nov. Fig. 63 is of the holotype. Figs 85–88: G. cf. eriensioides. Scale bar = 10 µm for all figures.
PLATE 13 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 13: SEM. Gomphoneis tumida. Figs 382–387: Fig. 382: External valve view. Arcuate raphe has dilated proximal ends and deflects onto the mantle at the poles. Striae are composed of round areolae in two rows. Figs 383–387: Internal valve views. Fig. 383: Full valve view showing rounded central area and prominent pseudosepta at the poles. Fig 385: Specimen without girdle bands shows septa at the poles and the large helictoglossae. Fig. 386: View of valve from central area to footpole, showing narrow axial area, and robust striae and interstriae. Septum is evident at footpole. Fig. 384: Central area showing the proximal raphe ends recurved in the same direction and rounded to ellipsoidal stigma openings occluded by teeth-like projections. Fig. 387: Central area showing the inwardly raised central nodule, with the stigmoids in depressions around the base and the elevated raphe ends recurved at its margin. G. sublanceolata. Fig. 388: External valve view shows the dilated proximal raphe ends, simple, rounded stigmoidal openings and striae composed of rounded, unoccluded areolae. The striae terminate with a single areola along the length of the valve.
PLATE 10 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 10: SEM. Figs 368–371: Gomphoneis lata. External valve views. Fig. 368: Overall valve view showing robust interstriae, thickened central area, straight raphe and isolated stigmoids. Fig. 369: Headpole with raphe extending well onto valve mantle. Fig. 370: Central area with doubly punctate striae ending as single areolae and isolated stigmoids much larger than the areolae. Fig. 371: Footpole, with apical pore field bisected by distal raphe end curving onto mantle, porelli elongate and right next to the striae, and some striae composed of 2 or 3 rows of areolae.
PLATE 3 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 3: LM. Figs 40–60: Gomphoneis hastatoides sp. nov. Fig. 41 is of the holotype.Scale bar = 10 µm for all figures.
PLATE 7 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 7: LM. Figs 169–174: Gomphoneis metzeltinii sp. nov. Fig. 169 is of the holotype. Figs 175–192: G. cf. subcapitata. Figs 193– 200: G. subcapitata sp. nov. Fig. 200 is of the holotype. Figs 201–214: G. inconspicua sp. nov. Fig. 201 is of the holotype. Figs 215– 222: G sp. cf. subcapitata. Figs 223–228: G. reichardtii sp. nov. Fig. 223 is of the holotype. Figs 229–237: G. sp. cf. skabitchevskii. Figs 238–250: G. sp. cf. skabitchevskii. Figs 251–260: G. skabitchevskii sp. nov. Fig. 258 is of the holotype. Figs 261–282: G. sp. cf. reichardtii. Scale bar = 10 µm for all figures.
PLATE 18 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 18: SEM. Gomphoneis reichardtii. Figs 422–424: Fig. 422: External valve view with stigmoids evident. The raphe is straight and the proximal ends are dilated. The apical pore field is positioned only on the valve mantle. Figs 423–424: Internal valve views with pseudosepta and helictoglossae evident at the poles. Stigmoids occur around the internally raised central nodule.
PLATE 5 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 5: LM. Figs 89–119: Gomphoneis tumida. Scale bar = 10 µm for all figures.
PLATE 6 in The diatom genus Gomphoneis Cleve (Bacillariophyceae) from Lake Baikal, Russia
PLATE 6: LM. Figs 120–127: Gomphoneis tumidoides sp. nov. Fig. 120 is of the holotype. Figs 128–131: G. rotundata sp. nov. Fig. 129 is of the holotype. Figs 132–143: G. gracilis sp. nov. Fig. 142 is of the holotype. Figs. 144–152: G. sp. cf. witkowskii. Figs 153– 158: G. lange-bertalotii sp. nov. Fig. 155 is of the holotype. Figs 159–168: G. witkowskii sp. nov. Fig. 168 is of the holotype. Scale bar = 10 µm for all figures.
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