Hypophylloceras
From Wikipedia, the free encyclopedia
| Hypophylloceras Temporal range: | |
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| A fossil of Hypophylloceras subramosum in Toyohashi Museum of Natural History | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Phylloceratidae |
| Subfamily: | †Phylloceratinae |
| Genus: | †Hypophylloceras Salfeld, 1924 |
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.[2]
Hypophylloceras includes Neophylloceras Shimizu 1934 (=Paraphylloceras Chimisu 1935 ), Hyporbulites Brestroffer 1947, Goretophylloceras Collingnon 1949 and Aphrotiticeras Mahmoud in Breister, 1952.[2]
The type species Hypophylloceras ononense, named by Salfeld in 1924 and based on Phylloceras ononense Santon 1895, comes from the Aptian of California.
