P. planorbis (Sowerby, 1824) (type) synonym Ammonites planorbis, A. sampsoni, P. sampsoni
P. becki
P. brevicellatum
P. calliphylloides
P. calliphyllum Neumayr, 1879 synonym Aegoceras calliphyllum
P. costosum
P. distinctum
P. erugatum
P. hagenowi
P. marcouxi Guex, Taylor, Rakus & Bucher, 1998
P. minillaensis von Hillebrandt, 2000
P. naumanni
P. pacificum Guex, 1980
P. polymorphum Guex, 1980
P. plicatulum (Quenstedt, 1883) synonym Ammonites plicatulus
P. primocostatum von Hillebrandt, 2000
P. psilonotum
P. sampsoni
P. spelae Guex, Taylor, Rakus & Bucher, 1998
P. spelae tirolicum von Hillebrandt & Krystyn, 2009
P. tenerum
P. tibeticum Yin et al., 2007
P. tilmanni Lange, 1925
Psiloceras is an extinct genus of ammonite. Psiloceras is among the earliest known Jurassic ammonites, and the appearance of the earliest Psiloceras species form the definition for the base of the Jurassic. Unlike most earlier ammonites, which had complex shell shapes and ornamentation, Psiloceras had a smooth shell.[3][4]
^Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28. {{cite journal}}: Cite journal requires |journal= (help)
^Paleobiology Database - Psiloceras. 2014-05-29.
^"Psiloceras pacificum". New Mexico Museum of Natural History and Science. Spring 2008. Archived from the original on 10 May 2015. Retrieved 5 August 2013.
^Howarth, Michael K. (2013). "Chapter 4: Psiloceratoidea, Eodoceratoidea, Hildoceratoidea.". In Selden, Paul A. (ed.). Treatise Online, Part L (Revised) Mollusca 4, vol. 3B, Triassic and Jurassic Ammonoidea. Lawrence, Kansas: Paleontological Institute, University of Kansas. doi:10.17161/to.v0i0.4441.
Psiloceras is an extinct genus of ammonite. Psiloceras is among the earliest known Jurassic ammonites, and the appearance of the earliest Psiloceras species...
place in the stratigraphic column where fossils of the ammonite genus Psiloceras first appear. A global reference profile (a GSSP) for the base was defined...
ratified 2001 Upper boundary definition First appearance of the ammonite Psiloceras spelae tirolicum Upper boundary GSSP Kuhjoch section, Karwendel mountains...
Jurassic as a whole, is marked by the first appearance of the ammonite Psiloceras spelae tirolicum in the Kendlbach Formation exposed at Kuhjoch. The base...
and the Jurassic System) is at the first appearance of ammonite genus Psiloceras. In the Tethyan domain, the Rhaetian contains two ammonite biozones. The...
densus or, in marine sections, by the first appearance of the ammonite Psiloceras planorbis. In the Newark basin the palynological turnover event (hence...
reference them being deposited before the first appearance of the ammonite Psiloceras planorbis. In certain restricted parts of Britain, the lowermost member...
phylloid saddle endings in some. The aptychus is single, found in sutu in Psiloceras Badouxia Guex and Taylor, 1976 Caloceras Discamphiceras Euphyllites Wahner...
Group. These beds likely occur below the first occurrence of the ammonite Psiloceras planorbis. Thus, they probably fall within the earliest Hettangian P....
Schattwald Beds occur the first fossils of Jurassic ammonites such as Psiloceras spelae, indicating the formal beginning of the Jurassic period. Geology...
Northern Calcareous Alps, Austria Biologic: Near first appearance of smooth Psiloceras spela group (Ammonite). 47°29′02″N 11°31′50″E / 47.4839°N 11.5306°E...
from a layer just metres below the first occurrence of Jurassic ammonite Psiloceras and above the Paper Shales that represent the lithological Triassic-Jurassic...
P. dezai. Psiloceras angulocostatum Sp. nov Valid Von Hillebrandt & Kment Early Jurassic (early Hettangian) Austria A species of Psiloceras. Rohillites...
Group. These beds likely occur below the first occurrence of the ammonite Psiloceras planorbis. Thus, they probably fall within the earliest Hettangian P....
originates below the first occurrence of Psiloceras planorbis ammonoid zone (pre-Planorbis beds), in the Psiloceras tilmanni Zone that immediately follows...
Group. These beds likely occur below the first occurrence of the ammonite Psiloceras planorbis. Thus, they probably fall within the earliest Hettangian P....
member of the family Galfettitidae. Genus includes new species P. sakhnoi. Psiloceras pseudocostosum Sp. nov Valid Kment Early Jurassic (Hettangian) Retrotornoceras...
1863 Nomada pruinosa Pérez, 1895 Nomada pseudops Cockerell, 1905 Nomada psilocera Kohl, 1908 Nomada pulawskii Tsuneki, 1973 Nomada pulchra Arnold, 1888...
204 Mya, Dorset, now 30°N, was under water, and the first ammonites (Psiloceras planorbis) appear among the shales and limestones that make up the lower...
earliest age and lowest stage of the Jurassic period and, specifically, the Psiloceras planorbis Ammonite Zone. Palaeocoma raiblana (Toula, 1887). This species...
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