Hustedt (1930)Navicula crucicula var. obtusata Grunow |
25-50 |
10-16 |
- |
- |
- |
Cleve-Euler (1953)Navicula crucicula β obtusata GrunowNavicula crucicula var. minor Agardh Cleve |
25-5030-50 |
10-1610-13 |
19- |
-- |
Fig. 884cd |
Germain (1981)Navicula protracta (Grunow) Cleve |
30-35 |
8-10 |
14-17 |
- |
Plate 83, Fig. 6 |
Krammer & Lange Bertalot (1986)Navicula crucicula var. crucicula (W. Smith) DonkinNavicula protracta (Grunow) Cleve |
35-10017-60 |
8-235-10 |
14-1814-20 |
-- |
Fig. 54: 1Fig. 55: 5, 6 |
Simonsen (1987)Navicula protracta f. elliptica Hustedt |
- |
- |
- |
- |
Plate 659, Fig. 1, 2 |
Levkov et al. (2007)Parlibellus protractus (Grunow) Witkowski, Lange-Bertalot & Metzeltin |
32-44 |
9-11 |
14-16 |
- |
Plate 64, Fig. 12 |
Levkov & Williams (2011)Prestauroneis tumida Levkov |
22-44 |
9-11 |
14-17 |
45 |
Fig. 69-82 |