Scientific Classification
| Kingdom: Animalia |
| Phylum: Mollusca |
| Class: Bivalvia |
| Order: Arcida |
| Family: Arcidae |
| Genus: Acar |
| Species: Acar millifila (Dall, 1903) |
Information
Geological Range
Paleogeographic Distribution
Stratigraphic Occurrences
| Bermont Formation |
| Caloosahatchee Formation |
Remarks
Synonymy:
1903 - Arca (Acar) millifila Dall: p. 1629, pl. 56, figs. 21, 24.
1916 - Arca millifila Dall. Sheldon: p. 21, pl. 4, figs. 13, 14.
1993 - Barbatia (Fugleria) millifila Dall. Campbell: p. 133.
Holotype: USNM 163473 (Schuchert, 1905, p. 56).
Type locality: “Pliocene marl of Shell Creek, Florida” (Dall, 1903, p. 1629). BHL.
Original description: “the ligament is typical of Acar, the radial threads are minutely granular, especially on the posterior dorsal slope; the shell is thin and the scars obscure” (Dall, 1903, p. 1629). BHL. Note that original description was presented by Dall in figure caption.
Other notes: As of 30 October 2025, this species is represented by only two specimen lots in the collections of the FLMNH: UF 19445 (Bermont Fm., Palm Beach Co., FL; 1 specimen) and UF 297125 (Caloosahatchee Fm., Charlotte Co., FL; 1 specimen).
References
Campbell, L. D. 1993. Pliocene molluscs from the Yorktown and Chowan River formations in Virginia. Virginia Division of Mineral Resources Publication 127. Department of Mines, Minerals, and Energy Division of Mineral Resources, Charlottesville, Virginia, 259 pp.
Dall, W. D. 1903. Contributions to the Tertiary fauna of Florida with especial reference to the Silex Beds of Tampa and the Pliocene beds of the Caloosahatchie River including many cases a complete revision of the generic groups treated of and their American Tertiary species. Part VI. Transactions of the Wagner Free Institute of Science of Philadelphia, 3(6): i-xiv, pp. 1219-1654, pls. 48-60. BHL.
Schuchert, C. 1905. Catalogue of the type and figured specimens of fossils, minerals, rocks, and ores in the Department of Geology, United States National Museum. Part 1 - Fossil invertebrates. Government Printing Office, Washington, 704 pp. BHL
Sheldon, P. G. 1916. Atlantic slope Arcas. Palaeontolographica Americana, 1(1): 5-100, pls. 1-16. BHL
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