Топ-100 ★ Free online encyclopedia. Did you know? page 290

★ Free online encyclopedia. Did you know? page 290



                                               

Harpoceratinae

Harpoceratinae is an extinct subfamily of cephalopods belonging to the family Hildoceratidae. Ammonites of this subfamily had involute and compressed shells with strong keels. Keel might be rarely missing, but this is considered to be an abnormal ...

                                               

Hemihoplites

Hemihoplites is an extinct genus of ammonoid cephalopods belonging to the family Hemihoplitidae. These fast-moving nektonic carnivores lived in the Cretaceous period, from Hauterivian age to Barremian age.

                                               

Holcodiscus

Holcodiscus is an ammonite genus placed in the family Holcodiscidae. Species in this genus were fast-moving nektonic carnivores. The type species of the genus is Ammonites caillaudianus.

                                               

Idoceras

Idoceras is a genus of perisphictacean ammonite, belonging to the Perisphinctidae subfamily Idoceratinae. The genus is known from the Upper Jurassic, with a widespread distribution. Shells of Idoceras are evolute, with a wide umbilicus, ribbing s ...

                                               

Involuticeras

Involuticeras is a perisphinctoid ammonite belonging to the Aulacostephanininae from the Upper Jurassic of Europe and possibly Mexico. The shell is involute, moderately compressed, with a rounded and ribbed venter. The genus is similar in general ...

                                               

Kilianella

Kilianella is a genus of the ammonite family Neocomitidae. The shell of Kilianella is evolute with a slightly grooved venter and covered by strong, gently flexious, single or bifurcating ribs. Kilianella is widespread in the lower Cretaceous and ...

                                               

Kossmatella

Kossmatella is an extinct genus of ammonoid cephalopods belonging to the family Lytoceratidae. These fast-moving nektonic carnivores lived in the Cretaceous period, from Albian age to Cenomanian age.

                                               

Kumatostephanus

Kumatostephanus is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago. It was slow moving and likely to fall victim to l ...

                                               

Lecanites

Lecanites is a ceratitid genus assigned to the Danubitaceae, with an essentially smooth, evolote, discoidal shell and a goniatitic suture with many elements. It is the type and now only genus of the Lecanitidae. Previously, according to the treat ...

                                               

Leiophyllites

Leiophyllites is a genus of early to middle Triassic ammonites belonging to the Ussuritidae, possibly forming an evolutionary link between Lower Triassic and later members of the family. The shell is evolute with a very slightly embracing whorls, ...

                                               

Leptosphinctes

Leptosphinctes is an extinct genus from a well-known class of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago.

                                               

Macrocephalites

Macrocephalites is a genus of the stephanoceratoid ammonite family Macrocephalitidae, diagnostic of the Callovian stage of the Middle Jurassic. Three subgenera, Dolikephalites, Kamptokephalites, and Pleurocephalite are recognized in addition to M ...

                                               

Nannites

Nannites is a genus in the ammonoid cephalopods in the order Ceratitida from the middle and upper Triassic of the Alps, named by Mojsisovics. Nannites is the type genus of the Nannitidae which has been placed in the Danubitaceae. Previously the N ...

                                               

Newmarracarroceras

Newmarracarroceras is an ammonite from the early middle Jurassic with a ribbed subinvolute shell with a keel running along the venter, or outer rim. The ubilicus is moderately wide, exposing the inner whorls exposed in part. Newmarracarroceras ha ...

                                               

Ochetoceras

Ochetoceras is a genus of ammonites, belonging to the Oppeliidae, that lived during the Late Jurassic from the early Oxfordian to the early Tithonian, and type for the subfamily Ochetoceratinae. Ochetoceras shell rather involute and strongly ribb ...

                                               

Oecotraustes

Oecotraustes is an extinct cephalopod genus included in the ammonid family Oppeliidae and named by Waagen in 1869. The genus lived during the Middle Jurassic.

                                               

Oosterella

Oosterella is an extinct ammonoid cephalopod genus belonging to the family Oosterellidae. These fast-moving nektonic carnivores lived during the Cretaceous, from the upper Valanginian age to the lower Hauterivian age.

                                               

Ophiceras

The shell of Ophiceras evolute, whorls all showing, slowly increasing in height, and slightly embracing the previous. Umbilicus, wide and moderately deep. Surface ornamented with faint folds, which in some develop into coarse ribs in the mature g ...

                                               

Oppelia

Oppelia is a haploceratoid ammonite and type genus for the Oppeliidae that lived during the Middle Jurassic. Shells of Oppelia are involute with a small to moderate size umbilicus, bluntly rounded to sharp venter, and deeply impressed dorsum. Sid ...

                                               

Ovaticeras

Ovaticeras is an extinct genus of cephalopod belonging to the family Hildoceratidae. These cephalopods existed in the Jurassic period, during upper Pliensbachian and lower Toarcian. Its fossils were found in Europe, North Africa and possibly also ...

                                               

Palaeophyllites

Palaeophyllites is a genus of ammonoids from the Lower Triassic and a contemporary of the related ussuritid Eophyllites. Shell Palaeophyllites is evolute, inner whorls usually smooth, the outer whorl with irregular edges. Sutures ceratitic mostly ...

                                               

Paraceratites

Paraceratites subnodosus † Mojsisovics 1882. Paraceratites orientalis † Yabe and Shimizu 1927. Paraceratites stecki † Silberling and Nichols 1982. Paraceratites gabbi † Meek 1877. Paraceratites binodosus † Hauer 1850. Paraceratites elegans † Mojs ...

                                               

Phoenixites

Phoenixites is an early genus of the Falcitornoceratinae, a subfamily of the goniatitid Tornoceratidae family. This genus was named by Becker in 1995. The type species is "Tornoceras" frechi. Phoenixites shell is discoidal, in which constrictions ...

                                               

Phylloceras

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

                                               

Placenticeras

Placenticeras, named by Fielding Bradford Meek, 1870, is the type genus for the Placenticeratidae, a family that is part of the Hoplitoidea, a superfamily of the Ammonitida.

                                               

Platyclymenia

Platyclymenia is a genus of ammonites belonging to the family Platyclymeniidae. Nektonic these fast-moving predators that lived in the Devonian period, the Famennian 364.7 in 360.7 MA.

                                               

Pleuroceras (ammonite)

Pleuroceras has a planulate shell with a quadrate whorl section, bearing strong radial ribs ending in ventro-lateral tubercles. The venter is tabulate with a strong serrated keel.

                                               

Proplacenticeras

Proplacenticeras is a discoidal ammonite from the lower part of the Upper Cretaceous and precursor of the overall similar Placenticeras. Shell compressed, with flat or slightly convex sides and narrow, flat Venter, With or without slightly conica ...

                                               

Prostacheoceras

Prostacheoceras is genus of ammonoid cephalopods belonging to the Vidrioceratidae family. Species belonging to this genus lived in early to middle Permian.

                                               

Protetragonites

Protetragonites is an extinct genus of ammonoid cephalopods belonging to the family Lytoceratidae. These fast-moving nektonic carnivores lived from the Jurassic period Tithonian age to the Cretaceous period Aptian age.

                                               

Pseudothurmannia

Pseudothurmannia is a genus of extinct cephalopods belonging to the subclass Ammonoidea and included in the family Crioceratitidae of the ammonitid superfamily Ancylocerataceae. These fast-moving nektonic carnivores lived in the Cretaceous period ...

                                               

Quenstedtoceras

Quenstedtoceras is a genus of ammonoid cephalopods that lived during the latter part of the Jurassic period in what is now France, Germany, and the United Kingdom.

                                               

Rasenia

Rasenia is an extinct ammonoid cephalopod genus belonging to the superfamily Perisphinctoidea. These fast-moving nektonic carnivores lived during the Upper Jurassic period, in the Kimmeridgian and Tithonian ages.

                                               

Rhacophyllites

Rhacophyllites is an extinct genus of cephalopods belonging to the family Discophyllitidae. These nektonic carnivores lived during the Triassic period, from Carnian to Rhaetian age.

                                               

Romaniceras

Romaniceras is a genus of early Upper Cretaceous ammonites in the Acanthoceratidae subfamily Euomphaloceratinae. The shell is quite interesting, the whorl section is circular or oval. Different from Acanthoceras 9 or 11 rows of tubercles, of whic ...

                                               

Saxoceras

Saxoceras is a genus of very evolute schlotheimiid ammonoids from the Lower Jurassic. The shell is discoidal Saxoceras bearing strong, generally straight ribs, which arise at the umbilical shoulder and thicken in the middle of the Venter. Similar ...

                                               

Schloenbachia

Schloenbachia is a genus of ammonoid cephalopods from the Cenomanian stage of the Upper Cretaceous, and type for the Schloenbachiidae, a family within the ammonitid Hoplitoidea. Schloenbachia was named by Newmayer, 1875, the type species Schloenb ...

                                               

Sphenodiscus

Sphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous. It was one of the last amm ...

                                               

Sturia

Sturia is a genus of ceratitid ammonoids from the Lower Triassic with an ammonitic suture. Sturia produced a robust, laterally compressed, high-whorled, involute shell, the whorls strongly embracing. surface without ribs or designs, but has a sha ...

                                               

Taffertia

Taffertia is an extinct genus of cephalopod belonging to the family Hildoceratidae. These cephalopods existed in the Jurassic period, during Toarcian age in the Falciferum zone and possibly only in Exaratum subzone. Its fossils were found in Cana ...

                                               

Uhligia (ammonite)

Uhligia is a genus of Lower Cretaceous ancylocerid ammonoid cephalopods initially found in Germany. Uhligia, name Kenna, 1904, has the General form characteristic detailed ancyloceratids. The first part is more or less straight, then sharply bent ...

                                               

Xiphogymnites

Xiphogymnites is an extinct ammonoid cephalopod genus from the Triassic included in the family Gymnitidae. It is known from the Balkans in eastern Europe. Shell similar to Gymnites, smooth, evolute, whorl section oval, arched Venter, suture ammon ...

                                               

Helicoplacus

Helicoplacus is the earliest well-studied fossil echinoderm. Fossil plates are known from several regions. Complete specimens were found in Lower Cambrian strata of the White Mountains of California. The animal was a cigar-shaped creature up to 7 ...

                                               

Platycrinites

Platycrinites are an extinct genus of Paleozoic stalked crinoids belonging to the family Platycrinitidae. These stationary upper-level epifaunal suspension feeders that lived during the Devonian, Permian and Carboniferous periods, from 376.1 259. ...

                                               

Sagenocrinites

Sagenocrinites is an extinct genus of crinoid from the Silurian period. During the Silurian period, a sea-covered Britain that was shallower in the south and deeper in the north lay south of the equator with a tropical to sub-tropical climate. Th ...

                                               

Uintacrinus

Uintacrinus is an extinct genus of crinoids from the Cretaceous of Kansas. It was unusual among crinoids because it had no stalk, and probably floated above the seafloor. It lived in the Western Interior Seaway. This crinoid was a colonial animal ...

                                               

Eutrephoceras

Eutrephoceras is an extinct genus of nautilus from the Late Jurassic to the Miocene. They are characterized by a highly rounded involute shell with slightly sinuous suture patterns.

                                               

Dromornis stirtoni

Dromornis stirtoni, colloquially known as Stirtons thunderbird, a member of the family Dromornithidae, is the second largest flightless bird found through fossil evidence. It was three metres tall and weighed half a tonne. It inhabited subtropica ...

                                               

Campendoceras

Campendoceras is a genus of proterocameroceratids from the Lower Ordovician of NW Australia and possibly Estonia that can be recognized by its slender, weakly endogastric, longiconic and annulate shell and large marginal siphuncle that contains e ...

                                               

Topaginella

Topaginella is a genus of minute fossil sea snails, marine gastropod mollusks or micromollusks in the family Cystiscidae. Like all of the related genera, this genus is sometimes still classified in the family Marginellidae. This genus went extinct.

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