| Holconautilus Temporal range: Upper Triassic | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Nautilida |
| Family: | † Tainoceratidae |
| Genus: | † Holconautilus Mojsisovics, 1902 |
Holconautilus is a genus of nautiloids from the family Tainoceratidae and order Nautilida, named by Mojsisovics, 1902, and known from Upper Triassic sediments in Europe and E Indies (Timor). Its shell, evolute, discoidal, with simple coarse lateral ribbing; whorl section, subrectagular with a broadly arched venter.
Holconautilus somewhat resembles the Permo-Triassic Pleuronautilus except its suture has ventral saddles instead of ventral lobes and lateral ribs are continuous. Anoploceras , from the same time and place as Holconautilus is also similar except for having a wider whorl section and a venter that is slightly concave.
