Cryptogemma

Cryptogemma is a genus of sea snails, marine gastropod mollusks in the family Turridae, the turrids.

Distribution
These are deep-sea species with a wide geographic distribution.

Species
According to Zaccharias et al. (2020) this genus should only include: The others should be excluded from this genus because the lack key characters such as the narrow fusiform shell and the well-marked peripheral anal sinus. They show closer resemblances to other conoidean families (such as Horaiclavidae) than to Turridae.
 * Cryptogemma aethiopica (Thiele, 1925)
 * Cryptogemma periscelida (Dall, 1889)
 * Cryptogemma phymatias (Watson, 1886)
 * Cryptogemma powelli Zaharias, Kantor, Fedosov, Criscione, Hallan, Kano, Bardin & Puillandre, 2020
 * Cryptogemma praesignis (Smith, 1895)
 * Cryptogemma tessellata (Powell, 1964)
 * Cryptogemma timorensis (Tesch, 1915)
 * Cryptogemma unilineata (Powell, 1964).

Species within the genus Cryptogemma include (according to WoRMS):
 * Cryptogemma aethiopica (Thiele, 1925)
 * Cryptogemma calypso Dall, 1919
 * Cryptogemma chilensis (Berry, 1968)
 * Cryptogemma chrysothemis Dall, 1919
 * Cryptogemma cornea (Okutani, 1966)
 * Cryptogemma eldorana (Dall, 1908)
 * Cryptogemma japonica (Okutani, 1964)
 * Cryptogemma longicostata Sysoev & Kantor, 1986
 * Cryptogemma oregonensis Dall, 1919
 * Cryptogemma periscelida (Dall, 1889)
 * Cryptogemma phymatias (Watson, 1886)
 * Cryptogemma polystephanus (Dall, 1908)
 * Cryptogemma powelli Zaharias, Kantor, Fedosov, Criscione, Hallan, Kano, Bardin & Puillandre, 2020
 * Cryptogemma praesignis (E. A. Smith, 1895)
 * Cryptogemma quentinensis Dall, 1919
 * Cryptogemma tessellata (Powell, 1967)
 * Cryptogemma timorensis (Tesch, 1915)
 * Cryptogemma unilineata (Powell, 1967)
 * Species brought into synonymy:
 * Cryptogemma adrastia Dall, 1919 : synonym of Carinoturris adrastia (Dall, 1919) (original combination)
 * Cryptogemma antigone Dall, 1919 : synonym of Antiplanes antigone (Dall, 1919) (original combination)
 * Cryptogemma benthima (Dall, 1908) : synonym of Cryptogemma phymatias (R. B. Watson, 1886)
 * Cryptogemma eidola Dall, W.H., 1919 : synonym of Borsonella callicesta (Dall, 1902)
 * Cryptogemma polycaste Dall, 1919 : synonym of Carinoturris polycaste (Dall, 1919) (original combination)