The Naviculales are an order of diatoms.
Suborders
Phaeodactylineae
Family According to the GBIF, the order has the following families;
Amphipleuraceae (contains 1k species) Berkeleyaceae (144) Brachysiraceae (112) Cavinulaceae (15) Cosmioneidaceae (7) Diadesmidaceae (303) Diploneidaceae (450) Gomphonemaceae (12) Metascolioneidaceae (3) Naviculaceae (9k) Neidiaceae (676) Phaeodactylaceae (2) Pinnulariaceae (3k) Plagiotropidaceae (50) Pleurosigmataceae (881) Proschkiniaceae (36) Scolioneidaceae (1) Scoliotropidaceae (59) Sellaphoraceae (250) Stauroneidaceae (1k)
Unplaced genera There are 5 genera that are incertae sedis. Boreozonacola (4) Brevilinea (2) Cholnokyella (1) Playaensis (3) Rexlowea (2)
Figures in brackets are approx. how many species per genus.
References