Cenomanian (Kennedy and Cobban, 1990a).
According to Kennedy and Cobban (1990a): Texas and Cenomanian of “southern India, Angola, Haute-Normandie in France, [and] Devon, England" (p. 85).
Original presentation: Ammonites involvulus Stoliczka, 1865
Original publication: Stoliczka. 1865. [p. 150, pl. 75, fig. 1].
Holotype: “is Stoliczka’s original specimen (1865 pl. 75, fig. 1)” (Kennedy and Cobban, 1990a, p. 85).
Type locality: South India (Kennedy and Cobban, 1990a).
Type horizon: Utatur Group (Kennedy and Cobban, 1990a).
Other specimens: USNM 420184.
PaleoDB taxon number: 130598.
References: Kennedy and Cobban (1990a).