B. Papp szerk.: Studia Botanica Hungarica 35. 2004 (Budapest, 2004)

Wojtal, A.; Buczkó, Krisztina: Comparative study of Navicula hasta and N. rakowskae: their morphology and distribution

Table 1. Morphological features of frustules of Navicula hasta and N. rakowskae. Navicula hasta Navicula rakowskae PANTOCSEK (1903) protologue holotype (designated by KRENNER) LANGE-BERTALOT (2001) (Köpecz) this study (Bodos) LANGE-BERTALOT (2001) protologue this study (Krakow-Czçstochowska Upland) valve shape lanceolate with obtusely rounded apices lanceolate strictly lanceolate, apices somewhat obtusely to almost acutely rounded rhombic-lanceolate with cuneate apices narrow lanceolate to almost linear lanceolate, tapering to the finally somewhat indistinctly protracted rather acutely than obtusely rounded apices narrow lanceolate with cuneate ends length 63-76 um 123 um 60-90 (or more than 100?) pm 76.8-98 pm 80-100 u m 69-94.3 pm breadth 14-18 um 22 pm 15-19 (or up to 25) pm 16.8-21.6 pm 12.5-16 pm 11.5-14.0 pm pattern of striation radiate radiate radiate throughout or the most distal pair parallel to convergent striae radiate throughout striae rather strongly radiate throughout except the last pair, or only a single one in subpolar position becoming parallel to slightly convergent striae radiate throughout the valve except only in subpolar region becoming parallel striae density 8-10 in 10 pm 7.5 in 10 pm 8-10 in 10 urn 6.2-7.5 in 10 urn ca 24 in 10 pm 8-10 in 10 pm 7.5-12 in 10 pm lineolae density 27 in 10 um constantly comparatively coarse, ca 26 in 10 pm 6.2-7.5 in 10 urn ca 24 in 10 pm 30-31 in 10 pm ca 28-36 in 10 pm