Thumia gutwinskii (Pantocsek) D.M. Williams, 2021

Williams, David M., 2021, Notes on the diatom collection of the Natural History Museum, London (BM) II- IV. Some type specimens in the genus Aulacodiscus Ehrenberg and nomenclatural notes on Thumia Cleve ex F. B. Taylor, Phytotaxa 480 (2), pp. 152-162 : 160

Thumia gutwinskii (Pantocsek) D.M. Williams , nov. comb.

Synonyms: Aulacodiscus gutwinskii Pantocsek 1909: 20 , pl. 1, fig. 1 (see Figure 30, rotated)

Thumia elegans Cleve ex Taylor 1929: 228

Thumia elegans Cleve ex Lefébure & Chenevière 1938: 11 , pl. 1, fig. 4 (see Figure 29)

Aulacodiscus splendidus Hustedt in Schmidt et al. 1958: pl. 464, figs 1-2, nom. superfl.

TYPE:— Czech Republic, Pouzdřany (= Pausram), South Moravia, BM 66644 (“ Thumia ” elegans, PAUSRAM , nr. Brünn [Brno], Moravia, S. H. M., Nov. ‘45’), BM Adams GC 3120 (‘ Thumia elegans Cl., Mährer [Moravia]’, with det. slip from Robert Ross added: ‘ Aulacodiscus gutwinskii’), lectotype designated here (see Figure 30), BM Adams J 4109 (‘ Thumia elegans Cleve, Pausram , Moravia [Thum slide]’, with det. slip from Robert Ross added: ‘ Aulacodiscus gutwinskii’) (see Figures 32–4); BM Adams J 4113 (‘ Thumia elegans Cleve , […] Pausram, Moravia [Thum slide, 1913’, with det. slip from Robert Ross added: ‘ Aulacodiscus gutwinskii’), BM 63141 (“ Thumia speciosa Cl. , […] Moravia ” [Thum slide]’), BM 66401 (‘Pausram, Thumia elegans (Aulacodiscus) gutwinskii Pant.’), all isotypes.