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Rhombostoma
Taxonomy
Rhombostoma was named by Seguenza (1876) [Sepkoski's age data: T Mi Q Plei Sepkoski's reference number: 909].
It was assigned to Neotaenioglossa by Sepkoski (2002); and to Iravadiidae by Ponder (1984) and Lozouet (2003).
It was assigned to Neotaenioglossa by Sepkoski (2002); and to Iravadiidae by Ponder (1984) and Lozouet (2003).
Species
Synonyms
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Synonymy list
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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.
G. †Rhombostoma Seguenza 1876
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†Rhombostoma carmelae Brugnone 1873
Invalid names: Eulimopsis Brugnone 1881 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. F. Ponder 1984 | Shell. Small, elongate-conic, smooth or spirally sculptured, with weaklyconvex whorls. Aperture elongately-ovate, angled and weakly channelled posteriorly; distinctly and rather deeply-channelled anteriorly; outer lip sinuate, with middle and uppermost (adapical) section advanced (see Fig. 13H). Inner lip thin, narrow; columella vertical, narrow. No external varix. Protoconch relatively small, of about two whorls, the first 12 whorls flat, the last half whorl rapidly descending. Figs. 13E-H. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Burdigalian to the top of the Calabrian or 20.44000 to 0.77400 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burdigalian | Italy | R. sp. 1 (178108) | |
| Zanclean | Spain (Huelva) | R. imperforatum (71916) | |
| Calabrian | Italy | R. carmelae (77008) |