1. Variety Hantzschia obtusa var. obtusa Kushev, 1936 (uncertain > unassessed)
2. Variety Hantzschia obtusa var. scalpelliformis Kushev, 1936 (uncertain > unassessed)

Lange-Bertalot, H., Cavacini, P., Tagliaventi, N. & Alfinito, S. (2003). Diatoms of Sardinia. Rare and 76 new species in rock pools and other ephemeral waters. <em>In: H. Lange-Bertalot (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 12. Biogeography-Ecoloy-Taxonomy. A.R.G. Gantner Verlag K.G.</em> 12: pp. 1-438.
page(s): p. 64; pl. 119, fig. 1-6, pl. 120, fig. 1-4 [details] Available for editors  

Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2025). DiatomBase. Hantzschia obtusa H.Lange-Bertalot, P.Cavacini, N.Tagliaventi & S.Alfinito, 2003. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=617838 on 2025-05-24

Marine Species Traits editorial board (2025). Marine Species Traits. Hantzschia obtusa H.Lange-Bertalot, P.Cavacini, N.Tagliaventi & S.Alfinito, 2003. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=617838 on 2025-05-24

[taxonomic tree]