Belongs within: Rotaliida.
The Hantkeninidae are agroup of planktonic Foraminifera known from the Palaeocene to the present (Loeblich & Tappan 1964).
Characters (from Loeblich & Tappan 1964): Test planispiral or enrolled biserial; chambers spherical to elongate or clavate; primary aperture symmetrical and equatorial, single or multiple, may have relict or areal secondary apertures.
<==Hantkeninidae
|–Cassigerinella Pokorný 1955 [Cassigerinellinae] LT64
| |–*C. boudecensis Pokorný 1955 LT64
| `–C. chipolensis S76
|–Hantkenininae LT64
| |–Cribrohantkenina Thalmann 1942 LT64
| | `–C. inflata (Howe 1928) [=Hantkenina inflata; incl. H. (*C.) bermudezi Thalmann 1942] LT64
| `–Hantkenina Cushman 1924 (see below for synonymy) LT64
| |–*H. alabamensis Cushman 1924 C40
| |–H. aragonensis Nuttall 1930 [=H. mexicana var. aragonensis, H. (*Aragonella) aragonensis] LT64
| |–H. brevispina Cushman 1924 [=*Sporohantkenina brevispina] LT64
| |–H. dumblei Weinzierl & Applin 1929 [=H. (*Applinella) dumblei] LT64
| |–H. mexicana C40
| `–H. primitiva Cushman & Jarvis 1929 (see below for synonymy) LT64
`–Hastigerininae LT64
|–Bolliella Banner & Blow 1959 LT64
| `–*B. adamsi (Banner & Blow 1959) [=Hastigerina (*Bolliella) adamsi] LT64
|–Clavigerinella Bolli, Loeblich & Tappan 1957 LT64
| `–*C. akersi Bolli, Loeblich & Tappan 1957 LT64
|–Globanomalina Haque 1956 LT64
| |–*G. ovalis Haque 1956 LT64
| `–G. chapmani FJ05
|–Pseudohastigerina Banner & Blow 1959 MO81
| |–*P. micra (Cole 1959) [=Nonion micrus, Globanomalina micra] LT64
| |–P. barbadoensis P79
| `–P. wilcoxensis (Cushman & Ponton 1932) [=Nonion wilcoxensis, Globanomalina wilcoxensis] MO81
`–Hastigerina Thomson in Murray 1876 [incl. Globigerinella Cushman 1927] LT64
|–H. pelagica (d’Orbigny 1839) [=Nonionina pelagica; incl. *H. murrayi Thomson in Murray 1876] LT64
|–‘Globigerinella’ aspera C40
|–‘Globigerinella’ digitata C40
`–H. siphonifera (d’Orbigny 1839) LT64 (see below for synonymy)
Hantkenina Cushman 1924 [=Hantkenia (l. c.) nec Munier-Chalmas in Fischer 1885 nec Prever 1902; incl. Applinella Thalmann 1942, Aragonella Thalmann 1942, Hantkeninella Brönnimann 1950, Sporohantkenina Bermúdez 1937] LT64
Hantkenina primitiva Cushman & Jarvis 1929 [=H. alabamensis var. primitiva, H. (*Hantkeninella) primitiva] LT64
Hastigerina siphonifera (d’Orbigny 1839) LT64 [=Globigerina siphonifera H03, Globigerinella siphonifera H03; incl. Globigerina aequilateralis Brady 1879 LT64, *Globigerinella aequilateralis LT64]
*Type species of generic name indicated
REFERENCES
[C40] Cushman, J. A. 1940. Foraminifera: Their classification and economic use 3rd ed. Harvard University Press: Cambridge (Massachusetts).
[FJ05] Friedman, M., & G. D. Johnson. 2005. A new species of Mene (Perciformes: Menidae) from the Paleocene of South America, with notes on paleoenvironment and a brief review of menid fishes. Journal of Vertebrate Paleontology 25 (4): 770–783.
[H03] Hanagata, S. 2003. Miocene-Pliocene Foraminifera from the Niigata oil-fields region, northeastern Japan. Micropaleontology 49 (4): 293–340.
[LT64] Loeblich, A. R., Jr & H. Tappan. 1964. Sarcodina: chiefly “thecamoebians” and Foraminiferida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt C. Protista 2 vol. 2. The Geological Society of America and The University of Kansas Press.
[MO81] Mancini, E. A., & G. E. Oliver. 1981. Planktic foraminifers from the Tuscahoma Sand (upper Paleocene) of southwest Alabama. Micropaleontology 27 (2): 204–225.
[P79] Papp, A. 1979. Tertiary. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A488–A504. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).
[S76] Scott, G. H. 1976. Foraminiferal biostratigraphy and evolutionary models. Systematic Zoology 25 (1): 78–80.