(of)Da Costa, Mendes E. (1778). Historia naturalis testaceorum Britanniæ, or, the British conchology; containing the descriptions and other particulars of natural history of the shells of Great Britain and Ireland: illustrated with figures. In English and French. - Historia naturalis testaceorum Britanniæ, ou, la conchologie Britannique; contenant les descriptions & autres particularités d'histoire naturelle des coquilles de la Grande Bretagne & de l'Irlande: avec figures en taille douce. En anglois & françois., i-xii, 1-254, i-vii, [1], Pl. I-XVII. London. (Millan, White, Emsley & Robson)., available online athttps://www.biodiversitylibrary.org/page/13116783[details]
MolluscaBase (2018). Neptunia gracilis (da Costa, 1778). Accessed through: (Eds) (2018) Register of Antarctic Species at: http://ras.biodiversity.aq/aphia.php?p=taxdetails&id=751144 on 2019-11-26
(Eds) (2019). Register of Antarctic Species. Neptunia gracilis (da Costa, 1778). Accessed at: http://ras.biodiversity.aq/aphia.php?p=taxdetails&id=751144 on 2019-11-26
original description(of)Da Costa, Mendes E. (1778). Historia naturalis testaceorum Britanniæ, or, the British conchology; containing the descriptions and other particulars of natural history of the shells of Great Britain and Ireland: illustrated with figures. In English and French. - Historia naturalis testaceorum Britanniæ, ou, la conchologie Britannique; contenant les descriptions & autres particularités d'histoire naturelle des coquilles de la Grande Bretagne & de l'Irlande: avec figures en taille douce. En anglois & françois., i-xii, 1-254, i-vii, [1], Pl. I-XVII. London. (Millan, White, Emsley & Robson)., available online athttps://www.biodiversitylibrary.org/page/13116783[details]
context source (Deepsea)Gofas, S.; Luque, Á. A.; Templado, J.; Salas, C. (2017). A national checklist of marine Mollusca in Spanish waters. <em>Scientia Marina.</em> 81(2) : 241-254, and supplementary online material., available online athttps://doi.org/10.3989/scimar.04543.21a[details]