Calappa gallus var. bicornis| Miers, 1884b: 550.
Calappa bicornis Rathbun, 1911: 197, pl. 17, fig. 8. -- Ihle, 1918: 308(list). -- Sakai, 1937a: 95, pl. 17, fig. 4. -- Guinot, 1967a: 245(list). -- Serène, 1968: 41(list). -- Takeda & Koyama, 1974: 104, pl. 10 A. -- Sakai, 1976a: 132, pl. 40, fig. 1. -- Serène & Vadon, 1981: 122. -- Takeda, 1982c: 106, fig. 312. -- Miyake, 1983: 23, pl. 8, fig. 1. -- Takeda & Shikatani, 1990: 477. -- Galil, 1997a: 275(key), 276, figs 1a, 2, 4a, 29. -- Muraoka, 1998: 20.
Calappa gallus (part = bicornis)| Rathbun, 1937: 214(part).
Non Calappa bicornis -- Tinker, 1965: 74.
= Calappa pokipoki Ng, 2000.
Non Calappa bicornis -- Manning & Chace, 1990: 45.
= Calappa galloides Stimpson, 1859.
Futakobu-calappa [Japanese]
calappa, Futakobu- [Japanese]