-
Perisphinctidae is a
family of
Middle and
Upper Jur****ic
discoidal ammonites in the
order Ammonitida. They have a s****
morphology that is
mostly evolute...
- class:
Cephalopoda Subclass: †Ammonoidea Order: †Ammonitida Family: †
Perisphinctidae Subfamily: †Perisphinctinae Genus: †Alligaticeras Buckman, 1923...
-
Perisphinctidae:
Middle and
Upper Jur****ic root stock,
derived from the
Stephanoceratidae (Middle Jur****ic
direct derivatives of the
Perisphinctidae)...
- Ammonitida)
found in England, Germany, and Switzerland,
belonging to the
Perisphinctidae. The s**** is
strongly embracing,
tending to be
oxyconic (sharp rimmed)...
- (2024). "First
Records of
Early Bajocian Leptosphinctes (Ammonoidea:
Perisphinctidae) in the
Northern Caucasus, Russia".
Paleontological Journal. 58 (6):...
-
superfamily Perisphinctoidea.
Previously Ataxioceras was ****igned to the
Perisphinctidae but has now been
placed in the
Ataxioceratidae for
which it is the...
-
Berriasian of the Cretaceous. The
family is
thought to
derive from
Perisphinctidae. "Paleobiology
Database - Himalayitidae".
Retrieved 2017-10-19. Ammonites...
- class:
Cephalopoda Subclass: †Ammonoidea Order: †Ammonitida Family: †
Perisphinctidae Subfamily: †Perisphinctinae Genus: †Perisphinctes Waagen, 1869 Type...
-
urinacensis East
Skoura syncline Isolated s**** An
ammonite of the
family Perisphinctidae and
indicator of the
Callovian age
Corbula C.
pectinata Aït Kermouss...
-
outer whorls become smooth and
sutures tend to
resemble those of the
Perisphinctidae. The
family includes three genera, Megalytoceras, and Metrolytoceras...
