Bivalvia

(Mussels & Clams)

 Photogallery: 

Synonyms:  Elliptio tamaulipasensis (Conrad)
                                           (Golightly 1982; Murray & Roy 1968; Strecker 1931)
                   Elliptio tamaulipasensis elongatus Simpson
                                           (Murray & Roy 1968; Strecker 1931)
                   Quadrula guadalupensis
                                            (Wurtz 1950)
                   Sphenonaias mitchelli
                                            (Neck PAEZ 1982; Neck 1984)
                   Sphenonaias taumilapana Conrad
                                            (Metcalf 1982)
                   Unio iheringii Wright
                                            (Simpson 1900; Wright 1898)
                   Unio mitchelli Simpson
                                            (Simpson 1900, 1914; Williamson 1896)
                   Unio mitchelli elongatus Simpson
                                            (Simpson 1914)
                   Unio mitchelli iheringi Wright
                                            (Simpson 1914)
                   Unio tamaulipasens

1896 Williamson
1898 Wright

1900 Simpson

1914 Simpson

1931 Strecker

1950 Wurtz

[1968 Murray & Roy]

1982 Golightly
1982 Metcalf
1982 Neck PAEZ
1984 Neck

1994 Howells DSFB105
1995 Howells DSFB119
1996 Howells DSFB125 1996 Howells et al.
1997 Howells Mather
         Bergman
1998 Howells DSFB147

[2003 TCDC]
[2008 NatureServe]

[ ] indicate state record, no specific county or locality indicated

notes:

-New Species as Unio iheringi (Wright 1898)

*Species of concern (AOBIS 2001) but TCDC (2003) lists it as "of historic occurrence throughout its range, may be rediscovered"

-found in flowing, high quality water in sand and gravel (Quinn et al. 1996)

-not reported from the Rio Grande for several decades (Howells & Ansley 1999); this species may be extinct (Howells 1998b); specimens reported from the Rio Grande drainage may be different species or even a different genus (Howells, Mather & Bergman 1997)