2: Specimen DLSM105225 (not figured). Apex fragment:
Specimen DLSM105321.
Derivatio nominis: From the Latin word “alienus”, meaning
“strange”, referring to the abrupt shift of the curling axis
and change of whorl geometry.
Locus typicus: Construction trench near Santang, ca 2 km
to the northeast of Nanning (N 22° 52.47’, E 108° 24.72’).
Stratum typicum: Gongkang Formation, Yongning Group,
Lower Oligocene.
Diagnosis: As for the genus.