Description: English: Alder J. & Hancock A. (1845-1855). A monograph of the British nudibranchiate Mollusca: with figures of all the species. The Ray Society, London. Published in 8 parts:Part 5 Fam.1 Plate 16 [1851]. Doris subquadrata (Alder & Hancock, 1845) synonym Acanthodoris pilosa Abildgaard in O. F. Müller, 1789 accepted name Doris oblonga Alder & Hancock, 1845: synonym Onchidoris oblonga (Alder & Hancock, 1845) accepted name. Date: 1851. Source:
https://www.biodiversitylibrary.org/item/131598#page/158/mode/1up. Author: Albany Hancock.