Bivalvia | Cardioida | Cardioidea | Cardiidae | Didacna protracta nominal species Adacna protracta Eichwald, 1841
Eichwald, 1829, Zool. Spec. Rossiae 1: 283, pl. 5, fig. 9 [as ‘Cardium protractum’].
Eichwald, 1841, Nouv. Mém. Soc. Imp. Nat. Moscou 7: 280, pl. 40, figs. 10-11.
= Didacna protracta Taxonomic Opinions
= Didacna protracta (Eichwald, 1841) — Wesselingh et al., 2019
= Didacna protracta (Eichwald, 1841) — Vinarski & Kantor, 2016
= Didacna protracta protracta (Eichwald, 1841) — Kantor et al., 2010
= Didacna protracta (Eichwald, 1841) — Zhadin, 1965
+ Cardium catillus Eichw. — Grimm, 1877
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