Ordovician Receptaculites camacho n. sp. from Argentina
By: Matthew H. Nitecki -- and Gerald G. Forney --.
Contributors: Forney, Gerald Glenn. joint author; Field Museum of Natural History.
Series: Fieldiana -- v. 37, no. 5; Field Museum of Natural History. Publication 1277; Publication (Field Museum of Natural History) -- 1277.
Publisher: Field Museum of Natural History
Published: 1978
Place of publication: Chicago
Subjects: Paleobotany -- Argentina; Paleobotany -- Ordovician; Algae, Fossil
Other titles: Ordovician Receptaculitids
Description: An Early Ordovician green alga, Receptaculites camacho n. sp., from the San Juan Formation in Talacasto Gorge, San Juan Province, Argentina is a probable ancestor of Receptaculites oweni of the  Galena-Kimmswick (Caradocian?) of North America. Analogy with recent calcareous green algae suggests that R. camacho inhabited warm, shallow, marine water. A paleomagnetic reconstruction of mid-Ordovician continental configurations places the North and South American localities of R. oweni and R. camacho in tropical latitudes. The major global oceanic currents for Middle Ordovician are inferred.