{{Automatic taxobox
直角石目 化石時期：
| |
|---|---|
| |
| Orthoceras | |
科學分類 
| |
| 界： | 動物界 Animalia |
| 門： | 軟體動物門 Mollusca |
| 綱： | 頭足綱 Cephalopoda |
| 亞綱： | †直角石亞綱 Orthoceratoidea |
| 目： | †直角石目 Orthocerida Kuhn, 1940 |
| 科 | |
| |
下屬分類
本目包括以下科：[1]
- Allumettoceratidae
- Arionoceratidae
- Baltoceratidae
- Brachycycloceratidae
- Choanoceratidae
- Clinoceratidae
- Dawsonoceratidae
- Engorthoceratidae
- Eriditidae
- Eskimoceratidae
- Geisonoceratidae
- Kionoceratidae
- Lamellorthoceratidae
- Michelinoceratidae
- Mysterioceratidae
- Narthecoceratidae
- Offleyoceratidae
- 直角石科 Orthoceratidae
- Paraphragmitidae
- Proteoceratidae
- Pseudorthoceratidae
- Psuedorthoceratidae
- Sactoceratidae
- Sactorthoceratidae
- Sichuanoceratidae
- Sphaerorthoceratidae
- Sphaerortoceratidae
- Sphooceratidae
- Stereoplasmoceratidae
- Striatoceratidae
- Tripteroceratidae
- Troedssonellidae
參考文獻
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