File:Pennsylvanian invertebrates of the Mazon Creek Area, Illinois Eurypterida figure 51.jpg

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Description The only known, well-preserved, and entire male (Type A) mesial appendage of Adelophthalmus. This occurs in a specimen of A. mansfieldi (C. E. Hall) from the Pennsylvanian, Allegheny group at Cannelton, Darlington township, Beaver County, Pennsylvania; previously figured by James Hall.
Date
Source archive.org
Author Erik Norman Kjellesvig-Waering
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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
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current13:04, 15 June 2011Thumbnail for version as of 13:04, 15 June 20111,732 × 1,832 (219 KB)Enomil{{Information |Description=Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: Eurypterida. ''Fieldiana, Geology''. Vol. 12, No. 6 (1963), figure 51 |Source=[http://www.archive.org/details/pennsylvanianinv126kjel archive.org] |Date=1963 |Author
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