Lophophaena decacantha (Haeckel, 1887) Petrushevskaya, 1971

Lithomelissa (Sethomelissa) decacantha n. sp., Haeckel, 1887, p. 1208, pl. 56, fig. 2.

Lophophaenoma decacantha Haeckel, emend., Petrushevskaya, 1971, pl. 62, fig. 1.

? Lithomelissa sp. cf. L. decacantha Haeckel, Nishimura, 1990, figs. 14.9a–c.

non Lophophaena decacantha Haeckel group, Takahashi, 1991, pl. 25, figs. 2, 8.

Peromelissa decacantha Haeckel, Van de Paverd, 1995, pl. 66, fig. 15.

non Lophophaenoma decacantha Haeckel, Itaki et al., 2008b, pl. 4, figs. 12 and 18.

Remarks. To our knowledge, no authors have illustrated exactly the morphology described and figured by Haeckel; in particular, the combination of ribs, feet, and appendages on the thorax. However, some authors have come close, which are included in this synonymy. As no specimens were observed in our EEP material, it is beyond the scope of this project to evaluate this species concept, but some clarification is needed.