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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Lantus
Original description: Test multicyrtid, conical, with horn, usually with strictures at joints, final post-abdominal chamber closing, with large subsperical, latticed expansion, Cephalis conical or dome-shaped. Cephalis, thorax and abdomen sparsely perforate, covered by layer of microgranular silica. Post-abdominal chambers consisting of single layer of dense, small, tetragonal, pentagonal, or hexagonal pore frames. Pore frames regular to irregular in shape and size.
Original remarks:Lantus, n. gen., differs form Pseudoristolan. gen., by having a test with well-developed horn, strictures at joints, and smaller, less regular polygonal pore frames.
Etymology: Lantus is a name formed by an arbitrary combination of letters (ICZN, 1985, Appendix D, pt. VI, Recommendation 40, p. 201)
It was assigned to Nassellaria by Sepkoski (2002); and to Eucyrtidiidae by O'Dogherty and Gawlick (2008).
| Year | Name and author |
|---|---|
| 1987 | Lantus Yeh p. 90 |
| 2002 | Lantus Sepkoski |
| 2008 | Lantus O'Dogherty and Gawlick |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
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| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range: base of the Early/Lower Sinemurian to the top of the Middle Toarcian or 199.50000 to 180.40000 Ma
Collections (76 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hettangian - Pliensbachian | Japan | L. praeobesus (120184 120186) | |
| Early/Lower Jurassic | Japan | L. praeobesus (125774) | |
| Early/Lower Sinemurian | Philippines | L. sp. A (51816) | |
| Late/Upper Sinemurian - Early/Lower Pliensbachian | Canada (British Columbia) | L. obesus, L. intermedius, L. praeobesus (119700 119701) | |
| Sinemurian - Pliensbachian | Japan | L. intermedius (120257) | |
| Early/Lower Pliensbachian | Canada (British Columbia) | L. intermedius (119715 119760 119764 119787 119791 119795 119797 119804) L. intermedius, L. praeobesus (119745 119746 119747 119748 119749 119750 119752 119754 119757 119759 119765 119766 119767 119788 119789 119790 119792 119794 119796 119801 119802 119854) L. obesus (119709) L. obesus, L. intermedius (119716) L. obesus, L. intermedius, L. praeobesus (119768 119800 119808) L. obesus, L. praeobesus (119810) L. obesus, L. sixi, L. intermedius, L. praeobesus (119770) L. praeobesus (119703 119755 119756 119758 119805 119807) L. sixi (119774) L. sixi, L. intermedius (119771 119773) L. sixi, L. intermedius, L. praeobesus (119713 119714 119775 119811) | |
| Late/Upper Pliensbachian | USA (Oregon) | L. sixi (124323) | |
| Late/Upper Pliensbachian | Canada (British Columbia) | L. intermedius, L. praeobesus (119710) L. praeobesus (71100) L. sixi, L. intermedius (71080) L. sixi, L. intermedius, L. praeobesus (119711 119776) | |
| Late/Upper Pliensbachian | Austria (Styria) | L. obesus, L. sutnal (95555) | |
| Pliensbachian | Greece | L. obesus (142120) | |
| Pliensbachian | Mexico (Baja California Sur) | L. sp. A (33558 33567) | |
| Late/Upper Pliensbachian - Early/Lower Toarcian | Oman | Pseudoristola obesa (125209 125296) | |
| Early/Lower Toarcian | USA (Oregon) | L. sixi (124331 124334) Pseudoristola obesa, L. sixi (124328) | |
| Early/Lower Toarcian | Japan | L. spp., L. sp., L. sixi, L. intermedius (124830) Pseudoristola obesa, L. sixi, Parahsuum sp. NB (51710) | |
| Early/Lower Toarcian | Oman | Pseudoristola obesa (125205) | |
| Middle Toarcian | Japan | Stichocapsa convexa (76521) |