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Murexiella graceae

Geological Range

Late Pliocene to Middle Pleistocene; Extinct.

Paleogeographic Distribution

Southern Florida.

Remarks

Original Description (from McGinty, 1940, p. 84):

"Shell small, spire low, about 5 whorls (nucleus lost), suture appressed, indistinct; whorls shouldered; about 7 foliated ribs or varices; ribs spined, stronger and some recurved on the crown; double row of basal spines in the siphonal region; aperture truncate-oval; canal straight, longer than the aperture. Height: 22 mm., width 16.8 mm.

Locality: Belle Glade, Palm Beach County. Horizon: Pliocene (?) Holotype in McGinty collection.

This attractive little shell is named for Grace Pilsbry, the discoverer. T. graceae can be distinguished from T. macgintyi by the lower spire, shouldered whorls, having larger recurved foliated spines on the crown and the straight canal."

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Stratigraphic Occurrences

Middle Pleistocene
Bermont Formation (S. FL)
Late Pliocene
Tamiami Formation (Pinecrest Beds) (S. FL)
<i>Murexiella graceae</i> from the Middle Pleistocene Bermont Fm. of Palm Beach County, Florida (UF 51612).
Murexiella graceae from the Middle Pleistocene Bermont Fm. of Palm Beach County, Florida (UF 51612).
Specimen of <i>Murexiella graceae</i> figured by McGinty (1940, pl. 10, fig. 2 and 2a); 22 mm in length. 2a is twice magnified.
Specimen of Murexiella graceae figured by McGinty (1940, pl. 10, fig. 2 and 2a); 22 mm in length. 2a is twice magnified.
Middle Pleistocene Map
Middle Pleistocene Map
Late Pliocene Map
Late Pliocene Map