Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis Author Linnaeus, Carolus text 1758 Laurentius Salvius Stockholm https://archive.org/download/mobot31753000798865/mobot31753000798865.pdf book 2C6327E1-5560-4DB4-B9CA-76A0FA03D975 https://doi.org/10.5962/bhl.title.542 3922206 Donax irus [ spec. nov. ] D. testa ovali: rugis membranaceis erectis striatis cincta. Gualt. test. t. 95. f. A. Habitat in M. Mediterraneo. Brander. Testa magnitudine Phaseoli, ovalis, alba, antice obtusissima , rugosa: rugis arcuatis, membranaceis, reflexoerectis, striatis, fere crispis, exterioribus sensim anterius majoribus. Cardo utrinque dentibus duobus minimis: altero bifido.