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Velebites

Velebites is a genus of middle Triassic ammonites from the Balkans belonging to the Aplococeratidae, a family within the Ceratitida. It is somewhat similar to Aplococeras in external form. The shell is evolute, discoidal with convex converging wh ...

Xenoceltites

Xenoceltites is an extinct ceratite ammonite found worldwide in the Lower Triassic. Xenoceltites belongs to the Xenoceltitidae, a taxonomic family within the ceratites that with two others now form the superfamily Xenodiscaceae. One of the earlie ...

Xenodrepanites

Xenodrepanites is an extinct ammonoid cephalopod genus belonging to the Ceratitida from the Upper Triassic of the Himalayas. Xenodrepanites has a very compressed, discoidal shell with a ventral furrow bordered by crenulated keels and a sub-ammoni ...

Cheilotomona

Cheilotomona is an extinct genus of prehistoric marine gastropods in the family Goniasmatidae. The species C. elegans is from a Pelsonian/Illyrian marine shale/marl in the Triassic Qingyan Formation of Guizhou Province, China.

Anatosuchus

Anatosuchus and the Greek souchos, for the broad, duck-like snout) is an extinct genus of notosuchian crocodylomorph discovered in Gadoufaoua, Niger, and described by a team of palaeontologists led by the American Paul Sereno in 2003, in the Jour ...

Bevahites

Bevahites is a Cretaceous ammonite with an evolute, ribbed, tuberculate, and keeled shell with a squarish to compressed whorl section. Bevahites is a member of the subfamily collignoniceratid Texanitinae and Acanthocerataceae and was found at the ...

Herrickiceras

Herrickiceras is an ammonite from the Upper Cretaceous which belongs to the Coilopoceratidae, a family within the superfamily Acanthoceratoidea. Herrickiceras has an established range in the Middle Turonian of the Upper Cretaceous. Its distributi ...

Yezoites

Yezoites is an extinct genus of ammonites placed in the family Scaphitidae. The genus is known lived during the Upper Cretaceous and was first described in 1910. The genus contains five species, Y. bladenensis, Y. orbignyi, Y. planus, Y. puerculu ...

Hakelocaris

Hakelocaris vavassorii is an extinct species of prawn belonging to the family Penaeidae. It was named in 1994 by Alessandro Garassino, and is the only species in the genus Hakelocaris. These shrimp lived during the Cenomanian. The fossils were di ...

Hauericeras

Hauericeras is an ammonite genus from the Late Cretaceous that lived from the Coniacian to the late Maastrichtian, from about 90 to 66 mya. Fossils have been found in Europe, Russia, South Africa, Australia, India, Iraq, and in the United States. ...

Palaeobenthesicymus

Palaeobenthesicymus is an extinct genus of prawns which existed in what is now Lebanon in the Late Santonian. It was described by Denis Audo and Sylvain Charbonnier in 2013, as a new genus for the species Penaeus libanensis, first described by P. ...

Palibacus

Palibacus praecursor is a fossil species of slipper lobster, the only species in the genus Palibacus. It was found in Cenomanian deposits at Hakel, Lebanon and described in 1886 by the German palaeontologist W. Dames. Its similarity to modern sli ...

Uhligites

Uhligites is an oppeliid ammonite included in the subfamily Streblitinae that lived during the latest part of the Jurassic and earliest Cretaceous, from about 150 to 140 m.y.a. Uhligites has been found in upper Jurassic deposits Ticona in China, ...

Megalocoelacanthus

Megalocoelacanthus dobiei is an extinct species of giant latimeriid coelacanth lobe-finned fish which lived during the Lower Campanian epoch until possibly the early Maastrichtian in the Late Cretaceous period in Appalachia, the Western Interior ...

Anisoceratidae

Anisoceratidae is an extinct family of heteromorph ammonites which belong to the Ancyloceratina superfamily Turrilitoidea. Members of the family range is from the lower Albian to the upper Turonian. The family is possibly derived from a member of ...

Barremitinae

Barremitinae is a subfamily belonging to the Ammonoidea subclass. Whorl section in this group ranges from more or less circular through rectangular to oxyconic. Ribbing, if present, is weak. Suture is relatively simple, without markedly retracted ...

Collignoniceratidae

Collignoniceratidae is a family of Upper Cretaceous ammonites characterized by typically more or less evolute shells with compressed, oval, or square whorl sections, serrate or entire keels, and dense ribs with one to 5 tubercles.

Craspeditidae

Craspeditidae is a ammonoid cephalopod family included in the Perisphinctoidea superfamily. Some classifiers consider the Craspeditidae a subfamily in the Polyptychitidae. These Ammonites lived in the late Jurassic and early Cretaceous period.

Crioceratidae

The Crioceratidae constitute a family of loosely to closely coiled Ammonitida included in the Ancyloceratoidea that lived during the Early Cretaceous, characterized by Crioceratites and other genera such as Hoplocrioceras and Paracrioceras. In Cr ...

Curacoites

Curacoites is a genus of ammonites which existed during the early Barremian of what is now Argentina. It was described by Beatriz Aguirre-Urreta and Peter F. Rawson in 2012, and the type species is C. rotundus.

Dipoloceras

Dipoloceras is a rather evolute, strongly ribbed and well keeled acanthocerataean ammonite from the Albian stage of the Lower Cretaceous included in the brancoceratid subfamily Mojsisovicziinae. The whorl section is typically inflated or depresse ...

Discoscaphites

Cretaceous of Greenland, Alabama, Arkansas, California, Colorado, Kansas, Maryland, Mississippi, Missouri, New Jersey, South Dakota, Tennessee, Texas, Wyoming, and North Carolina

Dufrenoyia

Dufrenoyia is an extinct genus of Cretaceous ammonites included in the family Parahoplitidae. These fast-moving nektonic carnivores lived in the Cretaceous period. The type species of the genus is Ammonites dufrenoyi.

Engonoceratidae

Engonoceratidae is a family of typically compressed, more or less flat sided and involute ammonites from the mid Cretaceous belonging to the Hoplitoidea. shells have flat sided outer rims, at least in some stage. Single or branching irregular rib ...

Forresteria

Forresteria is an extinct genus of cephalopod belonging to the subclass Ammonoidea. They flourished during the late Turonian and early Coniacian of the Late Cretaceous, and were global in extent. Forresteria alluaudi and Forresteria hobsoni are c ...

Gassendiceras

Gassendiceras coulletae Bert, Delanoy & Bersac, 2006. Gassendiceras hammatoptychum Uhlig, 1883. Gassendiceras enayi Bert, Delanoy & Bersac, 2006. Gassendiceras alpinum dOrbigny, 1850 Synonym Crioceras alpinum. Gassendiceras quelquejeui Bert, Dela ...

Hamites (genus)

Hamites is a genus of heteromorph ammonite that evolved late in the Aptian stage of the Early Cretaceous and lasted into the Cenomanian stage of the Late Cretaceous. The genus is almost certainly paraphyletic but remains in wide use as a "catch a ...

Hamulinidae

Hamulinidae is an extinct ammonoid cephalopod family belonging to the order Ammonitida. These cephalopod were fast-moving nektonic carnivores. They lived during the Cretaceous period.

Holcodiscidae

Moderately involute with rounded, rectangular, or depressed whorl section, straight or sinuous, fine, dense ribs typically continuing over venter and may be periodically truncated by oblique, enlarged ribs, with or without umbilical, lateral and ...

Hypophylloceras

Hypophylloceras is a Cretaceous ammonite with a finely ribbed, compressed, involute shell, some having periodic stronger ribs or folds. The suture is complex, with large, asymmetric and finely divided lobes, the 1st lateral being much larger than ...

Karamaites

Karamites is an extinct cephalopoda genus belonging to the Ammonoidea and included in the hoplitacean family Placenticeratidae. Karamites lived in the latter Region the late early Cretaceous, derived from Semenoviceras. This is a typical form for ...

Leymeriellidae

Leymeriellidae is a family of Lower Cretaceous ammonites comprising rather small forms distinguished from Hoplitidae by their flattened and grooved ribs and virtual absence of umbilical tubercles. The family is derived from the Desmoceratidae. Le ...

Lyelliceratidae

Lyelliceratidae is a family of ammonites belonging to the superfamily Acanthoceratoidea. These cephalopods were nektonic fast-moving predators. They lived in the Cretaceous period to 94.3 109.0 MA.

Lytoceras batesi

Lytoceras batesi is an ammonite species belonging to the family Lytoceratidae. These cephalopods were fast-moving nektonic carnivores. They lived in the Cretaceous period.

Nostoceratidae

Nostoceratidae is a diverse family of heteromorph ammonites found throughout the oceans of the world during the Late Cretaceous. The nostoceratids are famous for the bizarre coiling of their shells. Many genera, such as Yezoceras, Ainoceras, Anak ...

Parapuzosia bradyi

Parapuzosia bradyi is a gigantic species of ammonite, reaching diameters of more than 4.5 ft by 6 ft. It is the largest species of ammonite in North America. It had a moderately involute shell with flat sides. The inner whorls are slightly oval-s ...

Phylloceras serum

Phylloceras serum is an extinct species of ammonoid cephalopods belonging to the family Phylloceratidae. These nektonic carnivores lived from Early Jurassic to Late Cretaceous.