Protozoa - Nassellaria - Eucyrtidiidae
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)
Full reference: K. Y. Yeh. 1987. Taxonomic Studies of Lower Jurassic Radiolaria from East-Central Oregon. National Museum of Natural Science Special Publications 2:1-169
Parent taxon: Eucyrtidiidae according to L. O'Dogherty and H. J. Gawlick 2008
See also Sepkoski 2002
Sister taxa: Artocapsa, Artophormis, Buryella, Calocyclas, Calocycloma, Clathrocycloma, Cymaetron, Cyrtocapsa, Cyrtocapsella, Eostichomitra, Eucyrtidium, Gigi, Guexella, Lithopera, Milax, Phalangites, Phormocyrtis, Pseudoeucyrtis, Schaumellus, Solenotryma, Stichocapsa, Stichocorys, Stichomitra, Vistularia
Subtaxa: Lantus intermedius Lantus obesus Lantus praeobesus Lantus sixi Lantus sutnal
Ecology: passively mobile planktonic omnivore
Distribution:
• Jurassic of Austria (1 collection), Canada (57: British Columbia), Greece (1), Japan (8), Mexico (2), Oman (3), the Philippines (1), United States (4: Oregon)
Total: 77 collections including 137 occurrences
Specimen images are retrieved through the ePANDDA API.
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