Cerion (Umbonis) stevensoni Dall, 1900
Synonymy
Cerion stevensoni
Dall, 1900: 65; Pilsbry, 1902: 220, pl. 44, fig. 70-71; Dall, 1905b: 40; Clench, 1934: 209; Clench, 1937a: .23, pI. 3, fig. 8-10; Clench, 1940:12.
Cerion (Umbonis) stevensoni
Clench & Aguayo, 1952: 435-436, pl. 53, fig. 1-3.
Dall (1900:65) originally published the species as coming from "Long or Berry Island," but subsequently (Dall, 1905:40) changed the type locality to Rum Cay, noting that "locality corrected by Stevenson in letter on file in archives."
Clench (1937:23) later confirmed the correct locality and confined the type locality to: Wemyss, 7 miles SE of Simms, Long Island, Bahamas.
Types, U.S. Nat. Museum; specimens in Stearns' collection, Detroit Mich., and Mr. Stevenson's collection.
Additional Records
LI-4 Long Island, Bahama Islands
[23° 25.473' N, 75° 10.567' W].
November 17, 1998
LI-22 Long Island, Bahama Islands
[23° 25.895' N, 75° 10.406' W].
Gould, Goodfriend, Harasewych, Pappas, Villacampa, Carpintero December 6, 2001
LI-23 USNM 1002176, Long Island, Bahama Islands
[23° 25.756' N, 75° 10.313' W].
Gould, Goodfriend, Harasewych, Pappas, Villacampa, Carpintero December 6, 2001
LI-42 Long Island, Bahama Islands
[23° 25.497' N, 75° 10.132' W].
December 13, 2001
LI-56 Long Island, Bahama Islands
[23° 25.698' N, 75° 10.267' W].
December 5, 2004
LI-57 Long Island, Bahama Islands
[23° 25.999' N, 75° 10.465' W].
December 5, 2004
LI-58 Long Island, Bahama Islands
[23° 26.203' N, 75° 10.203' W].
December 5, 2004
LI-59 Long Island, Bahama Islands
[23° 25.699' N, 75° 10.267' W].
December 5, 2004
LI-60 Long Island, Bahama Islands
[23° 25.467' N, 75° 10.094' W].
December 5, 2004
Remarks
Dall (1900) noted "The entire absence of the axial fold is notable" and regarded this species to be "related to the group of C. scalarinum Pfr., called Umbonis by Maynard." Clench (1934) considered it to be related to C. felis P & V.
This species, as presently understood, is limited to a 5 km portion along the northeastern coast of Long Island. Populations are patchy with considerable variation between populations.
Clench (1940:12) regarded this taxon to belong to the Group of Cerion scalarinum.
Additional Information
Search for additional records in the collections of:
The National Museum of Natural History, Smithsonian Institution
The Field Museum of Natural History
GenBank® (NIH genetic sequences database)
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