- The
Peltoceratinae comprise a
subfamily in the Aspidoceratidae, (middle and
upper Jur****ic
perisphinctacean ammonites).
Genera in the
Peltoceratinae have...
- in
middle and
upper Jur****ic sediments.
Aspidoceratinae differ from
Peltoceratinae in that the
early biplicate ribbed stage is lacking, or
greatly reduced...
- 37 m in
diameter (missing at
least half a
whorl of the body chamber).
Peltoceratinae gen. et sp. indet. 1.78 m (estimate)
Poulton (1989)
Estimate based on...
- and have been
subdivided into
three subfamilies, the Aspidoceratinae,
Peltoceratinae, and Simoceratinae.
Aspidoceratinae Zittel 1895
Aspidoceras Chinamecaceras...
- †Ammonoidea Order: †Ammonitida Family: †Aspidoceratidae Subfamily: †
Peltoceratinae Genus: †Rursiceras Buckman, 1919
Species Rursiceras pseudotorosum Prieser...
-
perisphictacian family, Aspidoceratidae, and a
member of the
subfamily Peltoceratinae, that
lived during the
Callovian stage, late in the
Middle Jur****ic...
- Epipletoceras, a
genus in the
Aspidoceratidae in the Treatise, (subfamily
Peltoceratinae). The
Idoceratinae is
based on Idoceras, a
genus in the,
according to...
-
Peltoceras is an
extinct ammonite genus from the
aspidoceratid subfamily Peltoceratinae that
lived during the
later part of the
Middle Jur****ic (U Callovian)...
