Jacagnas River (Oligocene of the United States)
Where: Puerto Rico (18.1° N, 66.5° W: paleocoordinates 17.3° N, 65.6° W)
• coordinate estimated from map
When: Juana Diaz Formation, Chattian (28.1 - 23.0 Ma)
• middle Oligocene (upper Globigerina ampliapertura Zone; Moussa and Seiglie, 1970), lower Chattian, ca. 31 Ma
Environment/lithology: marine; calcareous shale
• calcareous shales
Primary reference: W. D. Matthew. 1916. New sirenian from the Tertiary of Porto Rico, West Indies. Annals of the New York Academy of Science 27:23-29 [M. Uhen/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 63149: authorized by Mark Uhen, entered by Mark Uhen on 08.08.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
Mammalia | |
? Halitherium antillense n. sp.
? Halitherium antillense n. sp. Matthew 1916 dugong |