The date is established by the date of publication of Hoek 1876 (see n. 2 below).

Hoek’s paper on the development of the Entomostraca (Hoek 1876) was published in May 1876; CD’s copy has not been found. The first part of the paper was on the embryology of Balanus (a genus of acorn barnacles; ibid., pp: 47–55) and was accompanied by engravings of the development of the egg in Balanus improvisus (table III figs. 1–9), on the detailed structure of the nauplius larvae of Balanus balanoides (a synonym of Semibalanus balanoides; table III figs. 10–18), and on the embryology of Balanus balanoides (table IV figs. 1–14). Entomostraca was the name used to refer to all crustaceans other than Malacostraca (Leftwich 1973).