species Mesonaias tampicoensis (Lea, 1838): synonymy

Unio tampicoensis Lea, 1838

Lea, 1838. Trans. Amer. Phil. Soc. 6 [O. 2]: 24, pl. 7, fig. 18.
Type(s): LECTOTYPE [AS HOLOTYPE] USNM_84843 (by Johnson & Baker, 1973: 172), Tampico, Mexico.

Lampsilis (Proptera) tampecoensis [sic] — Simpson (1900)
Unio (Lampsilis) tampicoensis — Martens (1900)
Lampsilis tampicoensis — Pilsbry (1910)
Lampsilis (Proptera) tampicoensis — Simpson (1914)
Lampsilis (Cyrtonaias) tampicoensis — Frierson (1927), Haas (1929)
Lampsilis (Cyrtonaias) tampicoensis tampicoensis — Haas (1969)
Cyrtonaias tampicoensis — Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Howells et al. (1996), Turgeon et al. (1998), ... Hopper et al. (2023), Freeman et al. (2025), FMCS (2025), Campbell & Lydeard (2026), Martínez et al. (2026)
Cyrtonaias tampicoensis tampicoensis — ITIS (2012)
Mesonaias tampicoensis — Cummings et al. (2025)

Unio tecomatensis Lea, 1841

Lea, 1841. Proc. Amer. Phil. Soc. 2: 30.
Lea, 1842. Trans. Amer. Phil. Soc. 8 [O. 3]: 234 [72], pl. 21, fig. 48.
Type(s): LECTOTYPE [AS HOLOTYPE] USNM_85338 (by Johnson & Baker, 1973: 172), Tecomate River, near Tlacotalpan, [Vera Cruz State], Mexico.

Lampsilis (Proptera) tecomatensis — Simpson (1900), Simpson (1914)
Unio (Lampsilis) tampicoensis var. tecomatensis — Martens (1900)
Unio tecomensis [sic], sp, aff. — de Gregorio (1914)
Lampsilis (Cyrtonaias) tampicoensis-tecomatensis — Frierson (1927)
Lampsilis (Cyrtonaias) tampicoensis tecomatensis — Haas (1969)
Cyrtonaias tampicoensis — R.I. Johnson (1999)
Cyrtonaias tecomatensis — Contreras-Arquieta (2000)
Mesonaias tampicoensis — Cummings et al. (2025)

Actinonaias (Disconaias) walkeri H.B. Baker, 1922

H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): 20, pl. 1, fig.s 1-2; pl. 9, fig. 49; pl. 10, figs. 48-50; pl. 11, figs. 48-49.
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_31844, Rio San Juan, Mexico.

Lampsilis (Disconaias) fimbriata — Frierson (1927), Haas (1969)
Actinonaias walkeri — R.I. Johnson (1998), Contreras-Arquieta (2000)
Mesonaias tampicoensis — Cummings et al. (2025)

Lampsilis rovirosai sanjuanensis H.B. Baker, 1922

H.B. Baker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (106): 27, pl. 8, fig. 39-42.
(intro'd as intra-sp. of Unio (Lampsilis) rovirosai Pilsbry, 1900)
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_34890, Rio San Juan, nr Haciendo de Cuatotolapam, Mexico.

Lampsilis (Cyrtonaias) umbrosa — Frierson (1927)
Mesonaias tampicoensis — Cummings et al. (2025)

Lampsilis (Cyrtonaias) tampicoensis kusteriana Frierson, 1927

‘Lea’ Küster, 1862. Conchyl. Cab. 9(2): 275, pl. 93, fig. 1 [as ‘Unio tampicoënsis’].
Frierson, 1927. Check List N. Amer. Naiades: 85, sp. 383d.
(intro'd as intra-sp. of Unio tampicoensis Lea, 1838)
Type(s): TYPE LOST XXX_UNKNOWN, [locality unknown].

Lampsilis (Cyrtonaias) tampicoensis-kusteriana — Frierson (1927)
Lampsilis (Cyrtonaias) tampicoensis kusteriana — Haas (1969)
Cyrtonaias tampicoensis — R.I. Johnson (1999)
Mesonaias tampicoensis — Cummings et al. (2025)

Cyrtonaias grandensis Metcalf, 1982

Metcalf, 1982. Symp. Rec. Tex.: ??.

Cyrtonaias tampicoensis — Howells et al. (1996)

Unio tampicoensis Küster, 1862

‘Lea’ Küster, 1862. Conchyl. Cab. 9(2): 275, pl. 93, fig. 1 [as ‘tampicoënsis’].
(reference to Unio tampicoensis Lea, 1838)

Unio (Lampsilis) tampicoensis var. tecomatensis — Martens (1900)
Lampsilis (Cyrtonaias) tampicoensis-kusteriana — Frierson (1927)
Lampsilis (Cyrtonaias) tampicoensis kusteriana — Haas (1969)

Lampsilis tampecoensis Simpson, 1900

‘Lea’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 570.
(error for Unio tampicoensis Lea, 1838)

Unio tecomensis de Gregorio, 1914

‘Lea’ de Gregorio, 1914. Il Nat. Siciliano 2: 56.
(error for Unio tecomatensis Lea, 1841)

Actinonaias ligamentina ligamentina — Watters et al. (2009)