Oxygyrus keraudrenii is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.

[5] Oxygyrus keraudreni (along with Atlanta peronii) attains the largest size (shell diameter to 10 mm) among the Atlantidae.

[1] Its surface is slightly irregularly covered with approximately 20-24 spiral lirae in a zigzag-shape that usually leave a narrow zone free just below the periphery.

[1] In the largest available specimen from Pliocene of Philippines, the teleoconch has one complete whorl, widening rapidly, which makes the shell about twice as wide as high.

[1] On the post-larval shell a vague spiral ornament is present and the peripheral belt remains visible as a slightly produced zone reaching the apertural margin.

[5] From the fossil record Oxygyrus keraudrenii has been found from Pliocene in Tiep, Roxas (map) and Anda, Pangasinan, Luzon, Philippines in 2001 (published in 2007).

[5] In the Indian Ocean was Oxygyrus keraudreni found essentially limited to the upper 100 m of the water column, with 90% between 50 m and the surface.

[5] Similarly, off Hawaii was it recorded low in numbers of individuals whose vertical range was limited to the upper 90 m of the water column, with most individuals occurring at night in the upper 45 m.[5] In another study from the same area off Hawaii it was found that Oxygyrus keraudreni was captured in nighttime tows but was either absent or nearly so from comparable daytime ones.