Dystactella excisa (de Koninck, 1885)

Bailey, Jack Bowman, 2021, The genera that never were: The impact of Janeia and Janacekia on phyletic and taxonomic relations within the Solemyidae (Bivalvia: Protobranchia), Palaeontologia Electronica (a 12) 24 (1), pp. 1-47 : 33-34

Dystactella excisa (de Koninck, 1885)

Remarks. A species of Dystactella with large, well-defined external ligament on the brevidorsum. The lost undescribed (nom. nud.) specimen of Solemya symesii figured by Baily (1880) is nearly identical to de Koninck’s (1885, pl. 9, figs. 13, 14) type of Solemya excisa ; other specimens of de Koninck attributed to S. excisa are indeterminate. Because the trivial name, excisa , is applied first to pl. 9, figs.

13, 14, it is here given priority.

1880 Solemya symesii Baily , p. 22. [no description (nom. nud.); based on two unnumbered figures of a single specimen, now lost; strong external ligament; similar to de Koninck’s (1885, pl. 9 figs. 13, 14) examples of Solemya excisa ]; lower limestone series, Easky, Bunowna, Co. Sligo, Ireland.

p 1885 Solemya excisa de Koninck , p. 122, pl. 9, figs. 13, 14, pl. 23, figs. 30, 39, 40, non pl. 23, fig. 42, 43 [gen. et sp. indet.]; Lower Carboniferous, (Tournaisian) calcaire carbonifère, Tournai, Belgium.

non 1900 Solemya excisa de Koninck ; Hind, p. 441, non pl. 50, figs. 11, 14?, 15 [ventrally embayed; Pc, Pr1; = Acharax cf. normali s sensu Howse]; Lower Carboniferous, Lowick, Northumberland; non pl. 50 figs. 12, 16 [Pc, Pr2, Bts, PAe; = Acharax cf. costellata ]; Carboniferous, Ardross, Scotland.