''Priscosiren'' is an extinct genus of

mammal Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or ...

which existed in the west Atlantic and

Puerto Rico Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated ...

during the early

Oligocene The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the ...

(

Chattian The Chattian is, in the geologic timescale, the younger of two ages or upper of two stages of the Oligocene Epoch/Series. It spans the time between . The Chattian is preceded by the Rupelian and is followed by the Aquitanian (the lowest stage ...

).Jorge Vélez-Juarbe & Daryl P. Domning (2014) Fossil Sirenia of the West Atlantic and Caribbean region: X. Priscosiren atlantica, gen. et sp. nov., Journal of Vertebrate Paleontology, 34:4, 951-964, DOI: 10.1080/02724634.2013.815192

Description

''Priscosiren'' was diagnosed from other "halitheriine" dugongids by Velez-Juarbe and Domning (2014).

Phylogeny

''Priscosiren'' is recovered by Velez-Juarbe and Domning (2014) as sister to the ''Metaxytherium'' + Hydrodamalinae and Dugonginae clades.

References

Oligocene sirenians Fossil taxa described in 2014 Prehistoric placental genera {{Paleo-sirenian-stub