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Phalium (Menthafontia)
Taxonomy
Phalium (Menthafontia) was named by MacNeil and Dockery (1984) [Sepkoski's age data: T Ol-l Sepkoski's reference number: 852]. Its type is Phalium (Menthafontia) menthafons.
It was assigned to Phalium by MacNeil and Dockery (1984); and to Neotaenioglossa by Sepkoski (2002).
It was assigned to Phalium by MacNeil and Dockery (1984); and to Neotaenioglossa by Sepkoski (2002).
Subtaxa
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Phalium (Menthafontia) MacNeil and Dockery p. 111 |
| 2002 | Menthafonia Sepkoski |
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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.
Subg. †Phalium (Menthafontia) MacNeil and Dockery 1984
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†Phalium (Menthafontia) menthafons MacNeil and Dockery 1984
†Phalium (Menthafontia) mississippiensis Conrad 1848
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. S. MacNeil and D. T. Dockery 1984 | Juveniles of both the type from the Mint Spring Formation and its Byram analog, Cassis mississippiensis Conrad, have a spiral sculpture all over the whorls in which the posterior edge of each spiral band is raised and the anterior edge is depressed. Adults, however, are nearly smooth. The shoulder has prominent thick nodes and there is usually a much weaker staggered set of nodes below the shoulder. At least from the standpoint of the spiral sculpture, juveniles and adults appear quite different (compare figs. 7 and 8, pi. 30). |