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Neocomitidae
Neocomitidae is a family of Lower Cretaceous ammonitids comprising genera with strongly ribbed evolute (all whorls exposed) to smooth, fairly involute (inner whorls mostly hidden) shells. In the 1957 description of the family Neocomitidae was regarded as the subfamily Neocomitinae within the Berriasellidae, a family within the Perisphinctoidea that ranged from the Late Jurassic into the Early Cretaceous. In a more recent treatment berriaselids are regarded as a subfamily within the Neocomitidae. Current opinion differers from the 1967 placement of Neocomitidae in the Perisphinctoidea but rather includes it in the superfamily Endemoceratoidea. Genera *''Acanthodiscus'' Uhlig, 1905 *''Argentiniceras'' Spath, 1924 *'' Berriasella'' Uhlig, 1905 *'' Decliveites'' Aguirre-Urreta and Rawson, 2010 *'' Delphinella'' Le Hegarat, 1973 *'' Delphinites'' Sayn, 1901 *'' Distoloceras'' Hyatt, 1900 *'' Elenaella'' Nikolov, 1966 *'' Eleniceras'' Breskovski, 1967 *'' Ellenaela'' Nikolov, 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berriasellidae
Berriasellinae is a subfamily of very late Jurassic and very early Cretaceous perisphinctoid ammonites in the family Neocomitidae. Berriasellinae comprises generally compressed, evolute genera, typically with furcated ribbing, and in some a smooth ventral band or groove. Berriasellinae are derived from the Ataxioceratidae and gave rise to the other Neocomitidae. The short lived Himalayitidae from the uppermost Jurassic have a similar appearance but differ in being generally broader and having sharper ribbing. In current classifications (e.g. Donovan ''et al.'' 1981) berriasellid perisphinctaceans are included in the Neocomitidae as a subfamily, the Berriasellinae. In older classification such as the Treatise on Invertebrate Paleontology, part L (1957), neocomitid genera are included in the Berriasellidae, '' sensu lato'', as the Neocomitinae. Berriasellinae includes the genera ''Andiceras'', ''Berriasella'', ''Blanfordiceras'', ''Delphinella'', '' Elenaella'', '' Jabronel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perisphinctoidea
Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic (Bajocian) to Lower Cretaceous (Barremian) ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before crossing the venter. Classification Some 16 families have been recognized in the Perisphinctoidea. The following is based on Donovan ''et al.'' 1981Donovan, Callomon and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. with modification from the Treatise on Invertebrate Paleontology, Part L (1957) * Perisphinctidae: Middle and Upper Jurassic root stock, derived from the Stephanoceratidae (Middle Jurassic direct derivatives of the Perisphinctidae) * Morphiceratidae * Tulitidae * Reineckeiidae *Pachyceratidae * Aspidoceratidae (early Upper Jurassic (Oxfordian) derivatives of Perisphinctidae) *Aulacostephanidae *Ataxioceratidae (mid Upper Jurassic (Kimmeridgian) derivatives of the Ataxioceratidae) * Dorsoplanitidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neocomites
''Neocomites'' is a genus of ammonite from the Lower Cretaceous, Berriasian to Hauterivian, and type genus for the Neocomitidae. with and (1996), ''Mollusca 4 Revised , Cretaceous Ammonoidea'', vol. 4, in ''Treatise on Invertebrate Paleontology'', Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, p. 60. Description The shell of ''Neocomites'' is fairly involute and compressed with flattish sides; covered with flexeous ribs that branch in small sheaves from faint umbilical tubercles, in some branching again or intercaled further out on the whorls, ending in small oblique bullae in either side of a smooth flat venter. Ribs may cross the venter transversely on later whorls. Sutures have deep 1st lateral lobes. Distribution ''Neocomites'' has a fairly widespread distribution and has been found in such places as central and southern Europe, North Africa, Madagascar, northern India, B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frenguelliceras
''Frenguelliceras'' is an ammonite genus from the Lower Cretaceous included in the perisphinctoid family Neocomitidae named by Leanza in 1945. The type species, ''F. magister'', is from the Valanginian,(Lower Cretaceous), of Argentina. ''Frenguelliceras'' has an evolute, flat sided shell with coarse, simple or widely splayed ribs dividing from the umbilical edge -inner margin of the outer whorl; venter -outer rim- with a smooth groove, bordered by incipiently tuberculate rib endings. References * W.J. Arkell, et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ... Part L, Ammonoidea Frenguelliceras-Paleodb Ammonitida genera Perisphinctoidea Early Cretaceous ammonites Fossils of Argentina Valanginian life ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berriasella
''Berriasella'' is a discoidal evolute perisphinctacean ammonite, and type genus for the neocomitid subfamily Berriasellinae. Its ribbing is distinct, consisting of both simple and bifurcated ribs that extend from the umbilical seam across the venter; its whorl section generally compressed, the venter more or less narrowly rounded. The species ''Berriasella jacobi'' traditionally has been regarded an index fossil defining the base of the Cretaceous, however since 2016 this had been replaced by the first occurrence of ''Calpionella alpina''. Some authors regard ''B. jacobi'' as instead belonging to the genus '' Strambergella.'' ''Berriasella'', named by Uhlig, 1905, is known from the late Upper Jurassic, Tithonian, to the early Lower Cretaceous, Berriasian and has a fairly worldwide distribution. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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'' has a widespread distribution on the Lower Cretaceous and has been found in the Upper Berriasian to Upper Valanginian In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.9 ± 2.0 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceou ... of the Western U.S., Mexico, China, southern Asia, and Europe. References Genus Killianellain Ammonite''Crioceratotes.free.fr''. Paleobiology Database ''Kilianella'' entry Early Cretaceous ammonites Ammonites of Europe Ammonitida genera Perisphinctoidea {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemoceratoidea
Endemoceratoidea is a superfamily of true ammonites (suborder Ammonitina). Taxonomy Families included in the Endemoceratoidea are: * Endemoceratidae * Neocomitidae * Pulchelliidae ''Pulchelliidae'' is an extinct ammonoid cephalopod family. with and (1996), ''Mollusca 4 Revised , Cretaceous Ammonoidea'', vol. 4, in ''Treatise on Invertebrate Paleontology'', Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The ... References Ammonitida superfamilies {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gard
Gard () is a department in Southern France, located in the region of Occitanie. It had a population of 748,437 as of 2019;Populations légales 2019: 30 Gard INSEE its is Nîmes. The department is named after the river ; the name of the river, Gard (), has been replacing the French name in recent decades, both administratively and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leopoldia (ammonite)
''Leopoldia'' is a genus of bulbous perennial plants in the family Asparagaceae, subfamily Scilloideae. The genus is widespread around the Mediterranean region and neighboring lands, from the Canary Islands to Iran. ''Leopoldia'' species were formerly included in the genus ''Muscari'' (as the ''Leopoldia'' group or subgenus), and like muscari are often called grape hyacinths., pp. 126 Their flowers are arranged in a spike or raceme with those at the top more brightly coloured than those lower down. Description ''Leopoldia'' can be distinguished from ''Muscari'' by being generally taller plants and having more open spikes or racemes of flowers, caused by the individual flowers being spaced further apart. The lower fertile flowers are relatively long, often urn-shaped or tubular and are white, yellow, green or brown but never blue; they have distinct 'shoulders' close to the mouth of the flower, which is smaller than the general diameter of the flower and surrounded by small lobe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |