Neoptychites
Encyclopedia
Neoptychites is an extinct ammonoid cephalopod genus from the Turonian
stage of the Upper Cretaceous, with a world wide distribution.
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.
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.
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 93.5 ± 0.8 Ma and 89.3 ± 1 Ma...
stage of the Upper Cretaceous, with a world wide distribution.
Description
Neoptychites includes extremely involute AmmonitidaAmmonitida
The Ammonitida is an order of more highly evolved ammonoid cephalopods from the Jurassic and Cretaceous time periods, commonly with intricate ammonitic sutures....
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 VascoceratidaeVascoceratidae
The Vascocertidae, named by Spath is family of Upper Cretaceous ammonites in the Superfamily Acanthocerataceae characterized by shells that are either smooth or bluntly tuberculate, or have sparse, coarse ribs. Sutural elements are shallow, irregular, and slightly indented, or deep and very indented...
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.