''Neoptychites'' is an extinct ammonoid cephalopod genus from the

Turonian The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous Epoch, or a stage in the Upper Cretaceous Series. It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma (million years ago). The Turonian is preceded b ...

stage of the

Upper Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', th ...

(around 94 to 89 Ma), with a worldwide distribution.

Description

Neoptychites includes extremely involute

Ammonitida Ammonitida is an order of ammonoid cephalopods that lived from the Jurassic through Paleocene time periods, commonly with intricate ammonitic sutures. Ammonitida is divided into four suborders, the Phylloceratina, Lytoceratina, Ancyloceratin ...

whose outer whorls have a high triangular section with a moderately rounded venter (the outer rim). Tho body chamber in adults is generally smooth, with a constricted aperture. The earliest whorls are smooth except for periodic constrictions; later juvenile whorls have numerous low ribs without tubercles.

Taxonomy

''Neoptychites'' belongs to the ammonite family

Vascoceratidae The Vascoceratidae is a family of Upper Cretaceous ammonites in the superfamily Acanthoceratoidea characterized by shells that are either smooth or bluntly tuberculate, or have sparse, coarse ribs. Sutural elements are shallow, irregular, and sli ...

and is included in the subfamily Vasoceratinae. The genus was named by Kossmat in 1895. Its type species is ''Ammonites telinga'' Stoliczka, 1865 (= ''Ammonites cephalotus'' Courtiller, 1860). It is probably derived from '' Paravascoceras''.

Distribution

Fossils of ''Neoptychites'' have been found in Austria, Brazil, Cameroon, Colombia ( La Frontera (Huila, Cundinamarca, Boyacá) and

Loma Gorda Formation The Loma Gorda Formation ( es, Formación Loma Gorda, Kl, Kslg) is a fossiliferous geological formation of the Upper Magdalena Valley (VSM) and surrounding Central and Eastern Ranges of the Colombian Andes, extending from Cundinamarca in the nor ...

Aipe Aipe is a town and municipality in the Huila Department, Colombia. It is located on the west bank of the Magdalena River in the Central Ranges of the Colombian Andes at altitudes between . Aipe borders Natagaima, Ataco and Planadas of the depart ...

, Huila),Patarroyo, 2016, p.41Patarroyo, 2011, p.69 Egypt, France, India, Jordan, Mexico, Morocco, Niger, Nigeria, Romania, Tunisia, United States (Arizona, Colorado, New Mexico, Texas), and Venezuela.''Neoptychites''
at Fossilworks.org

References

Bibliography

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Description

Taxonomy

Distribution

References

Bibliography

Further reading