Английская Википедия:Hypophylloceras
Шаблон:Short description Шаблон:Automatic taxobox
Hypophylloceras is a Cretaceous ammonite with a finely ribbed, compressed, involute shell; some having periodic stronger ribs or folds. The suture is complex, with large, asymmetric and finely divided lobes; the 1st lateral being much larger than the external (=ventral) and 2nd lateral lobes. Saddle endings commonly not phylloid.[1]
Hypophylloceras includes Neophylloceras Shimizu 1934 (=Paraphylloceras Chimisu 1935 ), Hyporbulites Brestroffer 1947, Goretophylloceras Collingnon 1949 and Aphrotiticeras Mahmoud in Breister, 1952.[1]
The type species Hypophylloceras ononense, named by Salfeld in 1924 and based on Phylloceras ononense Santon 1895, comes from the Aptian of California.
References
- Imlay 1960. Early Cretaceous (albian) Ammonites from the Chitina Valley and Talkeetna Mountains, Alaska. US Geological Survey PP 354-D
- Hypophylloceras entry in the Paleobiology Database 5/02/12
- Английская Википедия
- Cretaceous ammonites
- Ammonitida
- Ammonites of North America
- Valanginian genus first appearances
- Hauterivian genera
- Barremian genera
- Aptian genera
- Albian genera
- Cenomanian genera
- Turonian genera
- Coniacian genera
- Santonian genera
- Campanian genera
- Maastrichtian genus extinctions
- Fossil taxa described in 1924
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