Surirella librile (Ehrenb.) Ehrenb. in Ber. Bekanntm. Verh. Koenigl . Preuss. Akad. Wiss. Berlin 1845: 139 table. 1845.

Jahn, Regine, Kusber, Wolf-Henning & Cocquyt, Christine, 2017, Differentiating Iconella from Surirella (Bacillariophyceae): typifying four Ehrenberg names and a preliminary checklist of the African taxa, PhytoKeys 82, pp. 73-112 : 75-76

Surirella librile (Ehrenb.) Ehrenb. in Ber. Bekanntm. Verh. Koenigl. Preuss. Akad. Wiss. Berlin 1845: 139 table. 1845.

≡ Navicula librile Ehrenb. in Abh. Königl. Akad. Wiss. Berlin 1831: 81. 1832.

Lectotype

(designated here). [icon!] BHUPM 1151c, d. (The cell representing the lectotype is reproduced here as Fig. 3A-B ).

http://phycobank.org/100031

Further material.

BHUPM 540177-3 „Trockenpräparate CLXXVII 3" (Fig. 3D ), BHUPM 540177-4" Trockenpräparate CLXXVII 4" (Fig. 3C ).

Synonyms.

= Cymbella solea Bréb. in Brébisson & Godey, Alg. Falaise: 51, pl. VII, p.p. 1835.

≡ Surirella solea ( Bréb.) Bréb., Consid. Diat.: 17. 1838.

≡ Cymatopleura solea ( Bréb.) W. Sm. in Ann. Mag. Nat. Hist. ser. 2. 7: 12. 1851.

Nomenclatural comment.

Ehrenberg (1845a) introduced and used the name Surirella librile . In this publication (1845a) he described all species new to science formally with a Latin diagnosis. Because he did not mark the species as new to science, Ehrenberg introduced the name Surirella librile as a new combination of Navicula librile under the then accepted genus name Surirella . This combination can be verified by the images Ehrenberg (1854) provided e.g. for Berlin material "Brakisches, strichweis lebendes, Erdlager unter Berlin" ( Ehrenberg 1854: pl. 14: fig. 38).

Taxonomical comment.

Ehrenberg (1832) published Navicula librile by a description which included the length of 1/10 Paris Line which is 225.6 µm. But this measurement does not correspond to the first observations he made in Berlin 1826 drawn on a small piece of paper (Fig. 3E ) and glued onto the drawing sheet BHUPM 1151. Nevertheless, the published measurement corresponds perfectly to two of his specimens on his drawing sheet BHUPM 1151 showing a living cell in valvar and girdle view (Fig. 3A-B ). Therefore, Ehrenberg (1832) was the first who described the species which was some years later described again as Cymbella solea Bréb. & Godey (1835) which was later recombined as Cymatopleura solea ( Bréb.) W. Sm. (1851) and became type of the name of the genus Cymatopleura ( Smith 1851). Ehrenberg’s specimens, probably deposited in 1835 or 1836 (see Ehrenberg 1838) give proof (Fig. 3C-D ) of his earlier findings ( Ehrenberg 1832). In addition, Ehrenberg apparently also observed the form which is identified today as " Cymatopleura solea var. apiculata " (cf. Fig. 3F, e .g. Krammer & Lange-Bertalot 1988, Hofmann et al. 2013). Schoeman and Archibald (1979) had accepted Ehrenberg’s taxon as having priority under Cymatopleura . Later Cymatopleura was conserved against Sphinctocystis Hassall with Cymatopleura solea as its type (see Wiersema et al. 2015). Since Cymatopleura is here not accepted at the rank of a genus, this conservation is not applicable to our taxonomic treatment.

Figures

Figure 3. Surirella librile. Lectotype: Drawing BHUPM 1151. A Girdle view representing the lectotype (corresponding to preparation BHUPM 540177 - 3 in 3 D) B Valvar view representing the lectotype; Ehrenberg indicated two views of one cell with dots between the undulated girdle view in A and the valvar view in B. C Corresponding preparation BHUPM 540177 - 4 D Corresponding preparation BHUPM 540177 - 3 E Documentation of Ehrenberg's observations in 1826 F Small cells in girdle view not correponding to the published protologue. Scale bar for C-D = 10 µm.