Stromboidea

• Strombidae
  • Strombus
    • Strombus evergladesensis Petuch, 1991

Original Description of Strombus evergladesensis by Petuch, 1991, p. 14:

• "Shell very bulbous, inflated, globose, with rounded shoulder on body whorl; spire, especially early whorls, elevated, protracted, scalariform; spire whorls ornamented with evenly spaced, small, knoblike spines that border suture; knoblike spines become obsolete and disappear on penultimate whorl; shoulders of penultimate whorl and body whorl smooth, without knobs or spines; body whorl smooth and polished with faint traces of growth increments; siphonal canal short, stubby, ornamented with numerous coarse spiral cords; stromboid on the very shallow, poorly developed; aperture wide, flaring; inner edge of lip (of adults) often ornamented with row of thin elongated denticles."

Types: holotype: "Length 72 mm, from 15 m depth in Griffin Brothers quarry, 10 km east of Miami Canal, along Broward-Palm Beach County line, Holey Land Unit, CM35698;" paratypes: "length 86 mm, same locality as holotype, CM35698; length 86 mm, same locality as holotype, CM35699; length 78 mm, same locality as holotype, Petuch collection"

Etymology: "named for the Everglades of southern Florida, within which the new species is often encountered during shallow subsurface excavations."

Strombus evergladesensis Petuch, 1991; Holotype; Coll. Carnegie Museum of Natural History no. CM 35698; Carnegie Museum of Natural History

Strombus evergladesensis Petuch, 1991; Paratype; Coll. Carnegie Museum of Natural History no. CM 35699; Carnegie Museum of Natural History

Comment Petuch, 1991, p. 14:

• "At most Holey Land exposures throughout the Everglades region, Strombus evergladensis is collected together with a form or subspecies of the Recent Carolinian S. alatus Gmelin, 1791. The new species differs from S. alatus, however, in being a consistently more bulbous, globose shell, in lacking large spines on the spire whorls and body whorl, in having a proportionally narrower spire, and in having a much shallower, poorly developed stromboid notch. Although the S. alatus form survived the numerous Pleistocene extinction events and is a common species in the Recent Carolinian Province, S. evergladensis and its lineage did not survive beyond Bermont time and is not present in overlying beds."

Specimens from institutional collections

Strombus evergladesensis Petuch, 1991; Bermont Formation, middle Pleistocene; South Bay, Palm Beach County, Florida, USA; Coll. Stichting Schepsel Schelp no. SSS 29051

Strombus cf. evergladesensis Petuch, 1991; Tamiami Formation, Pliocene; Quality Aggregates, Sarasota County, Florida, USA; 1993; Coll. Stichting Schepsel Schelp no. SSS 22467

Strombus evergladesensis Petuch, 1991; Bermont Formation, middle Pleistocene; Griffin Brothers quarry, 10 km east of Miami Canal, along Broward-Palm Beach County line, Florida, USA ; 1995; Coll. Stichting Schepsel Schelp no. SSS 24186; Det. Ed Petuch

Strombus sp.; Bermont Formation, middle Pleistocene; River Canal, south Florida, USA; 93 mm; 1992; Coll. Stichting Schepsel Schelp no. SSS 16375

Specimens from private collections

Strombus evergladesensis Petuch, 1991; Pleistocene, South of Arcadia, DeSoto County, Florida, USA; Coll. Antoine Heitz loc no. HA 28154

Strombus evergladesensis Petuch, 1991; Pleistocene, South of Arcadia, DeSoto County, Florida, USA; Coll. Antoine Heitz loc. no. HA 28154

Strombus evergladesensis Petuch, 1991; Caloosahatchee Formation, lower Pleistocene; DeSoto County Shell Pit, Arcadia, DeSoto County, Florida, USA; Coll. Antoine Heitz no. 2090 G

Strombus evergladesensis Petuch, 1991; Caloosahatchee Formation, lower Pleistocene; DeSoto County Shell Pit, Arcadia, DeSoto County, Florida, USA; Coll. Antoine Heitz no. 2090 G

Strombus evergladesensis Petuch, 1991; Pinecrest Beds, Pliocene; Acline Shell Pit, Acline, Charlotte County, Florida, USA; Coll. Antoine Heitz no. 2090 F

Strombus evergladesensis Petuch, 1991; Pleistocene; Piles along Caloosahatchee River, Ortona Lock, Glades County, Florida, USA; Coll. Antoine Heitz no. 2090 E

Strombus evergladesensis Petuch, 1991; Pleistocene; Piles along Caloosahatchee River, Port La Belle, Hendry County, Florida, USA; Coll. Antoine Heitz no. 2090 C

Strombus evergladesensis Petuch, 1991; Pleistocene; Piles along US 27, 5.5 km south of South Bay, Palm Beach County, Florida, USA; Coll. Antoine Heitz no. 2090 H

Strombus evergladesensis Petuch, 1991; Pleistocene; Apollo Beach, South Tampa, Hillsborough County, Florida, USA; Coll. Antoine Heitz no. 2147

Strombus evergladesensis Petuch, 1991; Pleistocene; New County Pit, west of LaBelle, Hendry County, Florida, USA; Coll. Antoine Heitz loc. no. HA 28135

References

• Petuch, E. J. 1991. New gastropods from the Plio-Pleistocene of southwestern Florida and the Everglades Basin. W. H. Dall Paleontological Research Center, Special Publication 1: 63 pp., [1]+5+[2] text-figs., 10 pls.
• Petuch, E. J. 1994. Atlas of Florida fossil shells (Pliocene and Pleistocene Marine Gastropods). Graves Museum of Archeology and Natural History, Dania, Fl. 394 pp., 100 pls.