Gomphonemopsis oahuensis (Hustedt) Lang Li, Yuhang Li & Changping Chen, 2024

Li, Lang, Nong, Qun-Zhuan, Chen, Chang-Ping, Li, Yu-Hang & Lai, Jun-Xiang, 2024, Two new diatom species of the genus Gomphonemopsis (Bacillariophyceae) from the coast of China and two new combinations for the genus, PhytoKeys 239, pp. 255-266 : 255

Gomphonemopsis oahuensis (Hustedt) Lang Li, Yuhang Li & Changping Chen comb. nov.

Cymbella oahuensis Hustedt 1942. Internationale Revue der gesamten Hydrobiologie und Hydrographie 42 (1/3): p. 98, figs 193-195. Lectotype: designated by Simonsen (1987, p. 282). BRM 163/65, illustrated as pl. 416, figs 4-8. Basionym.

Gomphosphenia oahuensis (Hustedt) Lange-Bertalot in Moser, Lange-Bertalot and Metzeltin 1998, p. 42, pl. 5, figs 6-8, pl. 53, figs 1-9. Synonyms.

Navicula oahuensis (Hustedt) Krammer in Krammer and Lange-Bertalot 1985, p. 83.

PhycoBank registration.

http://phycobank.org/104211.

Notes.

Gomphonemopsis exigua var. platypus was originally described from Bornholm, Denmark as Gomphonema platypus Østrup. Subsequently, Krammer and Lange-Bertalot (1985) reclassified this taxon as a variety of Gomphonema exiguum . Snoeijs transferred it to Gomphonemopsis ( Snoeijs and Balashova 1998). Despite sharing a similar size dimension and stria density with the nominate variety ( Medlin and Round 1986; Snoeijs and Balashova 1998), it has a unique widened foot pole differing from other congeners ( Snoeijs and Balashova 1998). Therefore, we suggest elevating Gomphonemopsis exigua var. platypus to the species level.