University of Wisconsin Digital Collections
Link to University of Wisconsin Digital Collections
Link to University of Wisconsin Digital Collections
The State of Wisconsin Collection

Page View

Juday, Chancey (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXI (1924)

Baker, Frank Collins
The fauna of the Lake Winnebago region,   pp. [109]-146 PDF (11.3 MB)


Page 132


132    Wisconsin Academy of Sciences, Arts, and Letters.
                          LIST OF MOLLUSCA
                                UNIONIDAE
  Dysnomia triquetra Raf. A single small individual was dredged from the
Fox River at Omro. This is the first record for Wisconsin, and the northern-
most record for any locality. It occurs in southern Michigan.
  Lampsilis ventricosa (Barnes). Common in the Fox River at Omro and
other places.
  Lampsilis ventricosa canadensis (Lea). Lakes Winnebago and Butte des
2dorts, abundant. Not before reported from Wisconsin.
  Lampsilis siliquoidea (Barnes). Common in the Fox River at Omro and
,other places.
  Lampsilis siliquoidea rosacea (DeKay). Lakes Butte des Morts and Winne-
bago, abundant. First authentic records from Wisconsin.
  Ligumia recta (Lamarck). Lake Winnebago, common. The typical form
lrom Lake Erie seems to be represented in the lake, where the individuals
are smaller and more brightly colored and rayed than the large, black speci-
mens from the rivers.
  Ligumia recta latissima (Raf.). Fox River at Omro and other places. The
large river form. Abundant.
  Proptera alata (Say). Common in Lake Butte des Morts and Lake Win-
nebago. As noted by Ortmann (1920) and others the Lake Erie form of alata
is smaller and more swollen than the river forms and the epidermis is usually
browner. The Winnebago Lake shells are of this form.
  Proptera alata megaptera (Raf.). Fox River and other places, common.
A much larger shell with more compressed valves.
  Leptodea fragilis (Raf.).  Omro and other places on the Fox River,
abundant.
  Leptodea fragilis lacustris (Baker). Lakes Winnebago and Butte des Morts,
common. The lake shells differ markedly from the river shells in color and
form. (Baker, 1922, p. 131.)
  Truncila trunoata (Raf.). Omro, Fox River, common. Lake Butte des
Morts, rare.
  Truncilla truncata (Raf.) variety. A form  of truncata occurs in Lake
Winnebago which is somewhat smaller than the river type of this species.
The umbones are less elevated, the valves are rounder and more compressed
and
the posterior ridge is much less developed. Not enough material is at hand
to differentiate this from the typical species.             0
  Actinonaias carinata (Barnes). Omro, Fox River, common; Lake Butte
des Morts, rare.
  Strophitus rugosus (Swainson). Omro, Fox River, rare.
  Strophitus rugosus (Swainson). Var. Lakes Winnebago and Butte des Morts,
not common.
  Anodonta imbecillis Say. Omro, Fox River, common.
  Anodonta grandis gigantea Lea. Omro, Fox River, common.
  Anodonta grandis footiana Lea. Lakes Winnebago and Butte des Morts,
abundant. This is the type locality for footiana.


Go up to Top of Page