Boreostemma has been placed as closely related to the later
Glyptodon and
Glyptotherium. Cladogram after Barasoain et al. 2022: }} }} }} }}}}}}}}}}}}}}}}}}}}|label1=Glyptodonts}}
Species Four species have been described in the genus
Boreostemma. Unspecified
Boreostemma fossils were found in the
Ipururo Formation of the
department of
Ucayali, Amazonian
Peru.
Asterostemma contains the type species
A. depressa and several
nomina dubia. The genus has been found in the
Early Miocene (
Santacrucian in the
SALMA classification)
Santa Cruz Formation of the
province of
Santa Cruz,
Argentina and in the
Solimões Formation in the
state of
Acre, Amazonian
Brazil. ;
B. pliocena The
type species B. pliocena was described in 2008 by Carlini et al. based on 30 osteoderms palate fragment with M6-7 alveoli. Fossils have been described from the
type locality along the road to Tío Gregorio in the
Codore Formation at the
Lagerstätte of
Urumaco. ;
B. gigantea B. gigantea was described as
Asterostemma gigantea in 1997 by Carlini et al. based on a partial skeleton. Fossils have been recovered at the Duke Localities 32, 108, 113, 114 and 121W in the
La Victoria Formation of the
Honda Group at the
Konzentrat-Lagerstätte La Venta. ;
B. acostae B. acostae was described as
Asterostemma acostae in 1983 by
Carlos Villarroel based on a carapace fragment with 44 plates. Fossils have been found in the
Cerbatana Member, and the Chunchullo Sandstone of the
La Victoria Formation, of the
Honda Group at the
Konzentrat-Lagerstätte La Venta. ;
B. venezolensis B. venezolensis was described as
Asterostemma venezolensis in 1947 by
George Gaylord Simpson, based on most of the carapace and the anterior end of the lower jaw, including teeth. Fossils have been uncovered from the
Santa Inés Formation along the banks of the Güere River in the
state of
Anzoátegui in Venezuela. == Gallery ==