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10 results for “Mastogloia elliptica”
FIGURES 53–60 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 53–60. Type specimens in pairs of the new species of Mastogloia showing first the striation and second the partectal ring, LM. (53–56) M. matthaei, CANA 86491, holotype specimen in Figs 55, 56; (57–60) M. stellae, CANA 86492, holotype specimen in Figs 59, 60.
FIGURES 61–64 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 61–64. Mastogloia ovulum, SEM, type material (BRM-AS40, Miang Besar, Borneo) in the Hustedt collection at Bremerhaven. (61) External view of valve showing sinuous raphe branches and apically elongated areolae; (62) External view of apex showing apically elongated areolae and distal raphe ending with no terminal fissure; (63) Internal valve view showing bilobed partecta (arrowhead) up to the apex; (64) Internal view of apex showing partecta with linear rows of fine pores.
FIGURES 21–28 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 21–28. Mastogloia ovalis, SEM (DISVAR-ANS2SP17, Siladen, Indonesia). (21) External view of valve showing straight raphe branches; (22) External view of central region showing proximal raphe endings; (23) External view of tilted valve showing partectal pore (arrowhead); (24) Internal valve view showing well-marked bilobed partecta (arrowhead); (25) Internal view of central region showing proximal raphe endings; (26) Internal view of valve showing partecta with linear rows of fine pores; (27) Internal view of tilted valve showing partectal pores (arrowhead); (28) External view of tilted valve showing rounded areolae covered by tongue-like vela with horseshoe-shaped edges.
FIGURES 1–8 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 1–8. Mastogloia binotata, SEM (DISVAR-ANC59SP43, Calabria, Italy). (1) External view of valve with straight raphe branches; (2) External view of the central region showing raphe endings and thin fascia; (3) External view of apex showing distal raphe ending with no terminal fissure; (4) Internal valve view showing one large, rectangular and central partectum (arrowhead) on each side of the valvocopula; (5) Internal valve view showing raised central nodule; (6) Internal view of valve margin showing flange (arrowhead) attaching the partectum to the valvocopula; (7) Oblique view of tilted specimen showing partectal pore (arrowhead) on open valvocopula; (8) External view showing sunken rounded areolae on the valve face covered by vela with rotae.
FIGURES 45–52 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 45–52. Mastogloia stellae, SEM, (45–50; DISVAR-ANS9SP31). (45) External view of valve showing sinuous raphe branches and irregular quincunx stria pattern; (46) External view of central region showing proximal raphe endings and sunken rounded areolae; (47) External view of apex showing distal raphe ending with no terminal fissure; (48) Internal valve view showing bilobed partecta (arrowhead) up to the apex; (49) Internal view of central region showing raised central nodule; (50) Internal view of apex showing helictoglossa and partecta with linear rows of fine pores. (51, 52) SEM, type material, (DISVAR-ANSH15SP31). (51) External view of tilted frustule showing partectal pores; (52) External view of valve margin showing sunken rounded areolae, with none present on mantle.
FIGURES 15–20 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 15–20. Mastogloia crucicula var. alternans, SEM (DISVAR-ANS3SP4A, Siladen, Indonesia). (15) External view of valve showing straight raphe branches and thin fascia; (16) External view of valve center showing proximal raphe endings and areolae with crescentic edges; (17) Internal view of valve center showing areolae and proximal raphe endings; (18) Internal valve view showing two bilobed partecta (arrowhead) in opposite quadrant; (19) External view of tilted specimen showing one partectal pore; (20) Internal view of tilted valve showing raised raphe-sternum and one partectal pore.
FIGURES 37–44 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 37–44. Mastogloia matthaei, SEM, type material (SEM stub DISVAR-ANS7SP46, Siladen, Indonesia). (37) External view of valve showing sinuous raphe branches and thickened longitudinal stria pattern (arrowhead); (38) External view of central region showing proximal raphe endings and quadrangular areolae; (39) External view of apex showing distal raphe ending with no terminal fissure; (40) Internal valve view showing bilobed partecta (arrowhead) up to the apex and longitudinal stria pattern; (41) Internal view of central region showing raised central nodule; (42) Internal view of valve showing partecta with linear rows of fine pores; (43) External view of tilted valve showing longitudinal stria pattern with no areolae on mantle; (44) External view of tilted valve showing partectal pores.
FIGURES 65, 66 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 65, 66. Mastogloia emarginata, LM, lectotype specimen from Hustedt collection' slide Zt2/65 (finder 433.5), Miang Besar, Borneo. (65) Valve showing four bilobed partecta on each side of the margin. (66) Valve showing finely transapically elongated areolate striae.
FIGURES 29–36 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 29–36. Mastogloia ovulum, SEM (DISVAR-ANS4SP32, Siladen, Indonesia). (29) External view of valve showing sinuous raphe branches; (30) External view of central region showing proximal raphe endings and apically elongated areolae; (31) External view of apex showing distal raphe ending with no terminal fissure; (32) Internal valve view showing bilobed partecta (arrowhead) up to the apex; (33) Internal view of central region showing raised central nodule; (34) Internal view of apex showing partecta with linear rows of fine pores; (35) External view of tilted specimen showing quincunx pattern of striae and no areolae on mantle (arrowhead); (36) External view of tilted valve showing partectal pores.
FIGURES 9–14 in Comparison of two new species of Mastogloia (Bacillariophyceae) with other small members of section Ellipticae
FIGURES 9–14. Mastogloia crucicula, SEM (DISVAR-ANS7SP4, Siladen, Indonesia). (9) External view of valve showing straight raphe branches and thin fascia; (10) External view of apex showing distal raphe ending with no terminal fissure; (11) Internal view of valve showing bilobed partectum ornamented with linear rows of fine pores; (12) Internal valve view showing one bilobed partectum (arrowhead) in each valve quadrant; (13) Internal view of tilted valve showing partectal pore (arrowhead); (14) External view of tilted valve showing areolae protected by siliceous vela with crescentic edges.
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