The taxonomy, phylogeny, and biostratigraphy of
Oligocene and lower Miocene Dentoglobigerina
and Globoquadrina are reviewed. Because of the
discovery of spine holes in various species assigned
to these genera, the entire group is now considered to
have been fully or sparsely spinose in life and hence
part of Family Globigerinidae. One new species,
Dentoglobigerina eotripartita Pearson, Wade, and
Olsson n. sp., is named. Dentoglobigerina includes
forms with and without umbilical teeth and species
for which the presence or absence of a tooth is a
variable feature. A significant finding has been the
triple synonymy of Globigerina tripartita Koch,
Globigerina rohri Bolli, and Globoquadrina dehiscens
praedehiscens Blow, which greatly simplifies part of
the taxonomy. The genus Globoquadrina is restricted
to its type species, Globigerina dehiscens Chapman and
others. The following species from the time interval
of interest are regarded as valid: Dentoglobigerina altispira (Cushman and Jarvis), Dentoglobigerina
baroemoenensis (LeRoy), Dentoglobigerina
binaiensis (Koch), Dentoglobigerina eotripartita
Pearson, Wade, and Olsson n. sp., Dentoglobigerina
galavisi (Bermúdez), Dentoglobigerina
globosa (Bolli), Dentoglobigerina globularis
(Bermúdez), Dentoglobigerina juxtabinaiensis
Fox and Wade, Dentoglobigerina larmeui (Akers),
Dentoglobigerina prasaepis (Blow), Dentoglobigerina
pseudovenezuelana (Blow and Banner),
Dentoglobigerina sellii (Borsetti), Dentoglobigerina
taci Pearson and Wade, Dentoglobigerina tapuriensis
(Blow and Banner), Dentoglobigerina tripartita
(Koch), Dentoglobigerina venezuelana (Hedberg),
and Globoquadrina dehiscens (Chapman, Parr,
and Collins). The genus Dentoglobigerina also
comprises other Neogene/Quaternary species not
listed, including the living species Dentoglobigerina
cf. conglomerata (Schwager)
