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Vol. XXXIX: Supplement THE FESTIVUS Page 57
COSTELLARIIDAE
Vexillum subdivisum (Gmelin, 1791) SDNHM 42933 (single beach deposit, empty shell). Remarks:
Rejected record, “Vexillum subdivisum is not known to occur on
the Pacific Plate.” Emerson (1999).
CONIDAE
Conus miliaris Hwass, 1792 Dall, 1910. Remarks: Most assuredly referring to Conus tiaratus.
Rejected record.
TEREBRIDAE
Terebra maculata (Linnaeus, 1758) Emerson (1991). Remarks: T. maculata was not listed in
Emerson (1994). Most likely a misprint in Emerson (1991).
Rejected record.
PYRAMIDELLIDAE
Cyclostrema cingulifera A. Adams, 1850
Hertlein & Allison (1966) (live). Remarks: Specimen(s) were
eventually described as a new species, Pachystremiscus solitarius
in Hertlein & Allison (1968) (line drawing). Rejected record.
CHROMODORIDIDAE
Glossodoris sedna (Marcus & Marcus, 1967) Debelius, 1996. Remarks: The color image in Debelius (1996)
was taken by Jim Black on the 1994 Clipperton Expedition. The
specimen was not collected. Locality record needs to be
confirmed.
APPENDIX 3: A DOCUMENTED ZOOGEOGRAPHIC REVIEW
OF THE MOLLUSCAN FAUNA OF ÎLE CLIPPERTON
Appendix 3 categorizes the 191 identified Clipperton species into seven groups which define their zoogeographic
affinities. The total number of identified taxa in each group is presented as a percentage of the 191 species:
Eastern Pacific Species: 72=37.7%
Indo-Pacific Emigrant Species at Clipperton Known to Occur on the Mainland (Oceanic Islands +
Mainland): 23=12.0%
Indo-Pacific Emigrant Species at Clipperton Known to Occur on the Oceanic Islands of the Tropical Eastern
Pacific (Oceanic Islands only): 41=21.5% (Grand total for Indo-Pacific: 64=33.5%)
Tropical Eastern Pacific Inter-Island Endemic Species: 17=8.9%
Circumtropical Species that Occur at Clipperton: 31=16.2%
Resident (Endemic) Species: 5=2.6%
Western Atlantic Ocean Species Occurring in the Tropical Eastern Pacific: 2=1.0%
This review includes 43 new distribution records for the tropical eastern Pacific oceanic islands. The geographic
entries are shown in bold and include: Islas Revillagigedo (24); Isla del Coco (14); Isla de Malpelo (1); Islas Galápagos
(3) and for mainland west America (1).
The following taxa have been listed according to their faunal elements. The citations for geographic locality
records following the species are believed to be the first record documented for each locality.
Eastern Pacific Species
Clipperton species representing established Panamic and/or Californian faunal elements that are known to have
tropical eastern Pacific oceanic island distributions.