Lea, I. 1848. Description of new fresh water and land shells. Transactions of the American Philosophical Society 10 [O. 4]: 67-101, pls. 1-9 (Obs. 4: 41-75). Available electronically.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 74 [48], pl. 5, fig. 13.
Type(s): FIGURED SYNTYPE USNM_85017, Red R., Alexandria, Louisiana.
Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 70 [44], pl. 2, fig. 5 [as ‘atro-costatus’].

Lea, 1845. Proc. Amer. Phil. Soc. 4: 165.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 77 [51], pl. 6, figs. 18.
Type(s): HOLOTYPE (MONOTYPY) USNM_85170, South America, Alabama?

Lea, 1845. Proc. Amer. Phil. Soc. 4: 165.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 79 [53], pl. 7, fig. 21.
Type(s): FIGURED SYNTYPE USNM_85108, Red R., Alexandria, Louisiana.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 75, pl. 5, fig. 14.
Type(s): FIGURED SYNTYPE USNM_84305, Clinch R., E. Tenn.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 81, pl. 8, fig. 23.
Type(s): FIGURED SYNTYPE USNM_84474, Holston R., Tenn.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 77 [51], pl. 6, fig. 17.
Type(s): LECTOTYPE USNM_84389 (by Schilling et al., 2025: 26), Clinch R., Tenn.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 72 [46], pl. 3, fig. 9.
Type(s): FIGURED SYNTYPE USNM_84952, Black Warrior River, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 73 [47], pl. 4, fig. 10.
Type(s): FIGURED SYNTYPE USNM_84649, Alexandria, La.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 78 [52], pl. 7, fig. 19.
Type(s): HOLOTYPE USNM_85665, Cobbs Cr., near Phil, Pennsylvania.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 165.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 76 [50], pl. 6, fig. 16.
Type(s): HOLOTYPE (MONOTYPY) USNM_85160, Tuscaloosa, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163 [as ‘hippopœus’].
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 67 [41], pl. 1, fig. 1 [as ‘hippopœus’].
Type(s): HOLOTYPE USNM_84096, L. Erie.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 69, pl, 2, fig. 4.
Type(s): HOLOTYPE USNM_86131, Richmond, Va.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 68 [42], pl. 1, fig. 2.
Type(s): POSSIBLE SYNTYPE ANSP_127444, Ala. River, Selma, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 165.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 82 [56], pl. 8, fig. 26.
Type(s): LECTOTYPE USNM_86224 (by Clarke, 1981: 18), N.C.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 79, pl. 7, fig. 20.
Type(s): HOLOTYPE (MONOTYPY) USNM_84958, Tuscaloosa, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 70 [44], pl. 2, fig. 6.
Type(s): HOLOTYPE (MONOTYPY) ANSP_56493, [no locality available - North America].

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 71 [45], pl. 3, fig. 8.
Type(s): SYNTYPE USNM_84298, N.C.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 81 [55], pl. 8, fig. 24.
Type(s): HOLOTYPE USNM_84838, Tuscaloosa, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 76 [50], pl. 5, fig. 15.
Type(s): FIGURED SYNTYPE USNM_84951, Black Warrior River, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 80 [54], pl. 8, figs. 22.
Type(s): FIGURED SYNTYPE USNM_84982, Rock R., Wis.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 73 [47], pl. 4, fig. 11.
Type(s): HOLOTYPE USNM_85604, Alexandria, La.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 165.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 82 [56], pl. 8, fig. 25.
Type(s): HOLOTYPE USNM_86682, Alexandria, La.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 71 [45], pl. 3, fig. 7.
Type(s): HOLOTYPE USNM_84646, Alexandria, La.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 74 [48], pl. 4, fig. 12.
Type(s): HOLOTYPE USNM_85750, Tuscaloosa, Alabama.

Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 69 [43], pl. 1, fig. 3.
Type(s): HOLOTYPE USNM_85172, N.C.