John A. Ryder
American ichthyologist and embryologist
John Adam Ryder (February 29, 1852 in Franklin County, Pennsylvania – March 26, 1895), was an American zoologist and embryologist. He worked for the United States Fish Commission from 1880 to 1886 and a Professor of Comparative Embryology at the University of Pennsylvania from 1886 to 1895.
He was elected as a member to the American Philosophical Society in 1886.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 8, 2025. The linked authority identifier is Q18911310. VIAF identifies the subject as 49599407. The Library of Congress control number is nr91024012. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1852, 1895, 1880 and 1886.
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This entry incorporates text from “John A. Ryder” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.