6. Biddulphia trilocularis Kützing 1844, p. 138, pl. 29, fig. 89

Kützing provides a very brief description of Biddulphia trilocularis, lists two localities (“ Insel Cuba: Peru ”) and cites two illustrations from Ehrenberg ( Biddulphia pulchella from Ehrenberg 1843, Taf. I, iii, fig. 25, Peru, and Denticella biddulphia from Ehrenberg 1843, Taf. II, vi, fig. 19, Cuba), noting that “Vielleicht gehört hierher auch Denticella Tridens Ehrenbg. Kreideth. 1839. p. 73” (Kützing 1844 p. 138). Kützing’s own illustration (1844, pl. 29, fig. 89, see Fig. 22) is quite possibly a reproduction, or re-drawing, of Ehrenberg’s Denticella biddulphia (Ehrenberg 1843, Taf. II, vi, fig. 19, Cuba) (Figs 23, 24) as there are no specimens in Kützing’s collection for Biddulphia trilocularis .

Kützing’s Biddulphia trilocularis was probably intended as a new name for Denticella biddulphia Ehrenberg (1843, Taf. II, vi, fig. 19), the nomenclature of this species (or groups of species) is somewhat complex and needs to be dealt with separately.