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Umbilia (Umbilia) siphonata
Taxonomy
Cypraea siphonata was named by Chapman (1922) [Cypraea sphaerodoma var. ? Tate, 1890: 210. Umbilia sp.— Burgess, 1989: 11, fig. C.—Lorenz, 1989: fig. 5. TYPE LOCALITY: Below Overland Corner, below Waikerie, Murray River, South Australia. ]. Its type specimen is P13243, a shell, and it is a 3D body fossil.
It was recombined as Umbilia (Umbilia) siphonata by Darragh (2002).
It was recombined as Umbilia (Umbilia) siphonata by Darragh (2002).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1922 | Cypraea siphonata Chapman p. 12 figs. pl. 3, fig. 16 |
| 1926 | Gisortia breviplicata Schilder pp. 361, 373 |
| 1935 | Umbilia (Palliocypraea) breviplicata Schilder p. 345 fig. 30 |
| 2002 | Umbilia (Umbilia) siphonata Darragh pp. 367 - 368 figs. 17A–E; 18A–F; 19A–B |
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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.
†Umbilia (Umbilia) siphonata Chapman 1922
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Invalid names: Umbilia (Umbilia) breviplicata Schilder 1926 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. A. Darragh 2002 | Shell large for genus, subhemispherical, tapering rapidly anteriorly to form narrow canal; prominently rostrate posteriorly. Transverse section of last whorl oval. Spire umbilicate, covered with glaze, whorls scarcely visible. Protoconch of 3.5 smooth, dome-shaped whorls, tilted at an angle to teleoconch whorls. Teleoconch of about 3 whorls.
Posterior canal extremely elongate, reflexed dorsally on most specimens, on others straight; weak longitudinal sulcus present on left dorsal side extending from end of canal into umbilicus; base of canal supported by lateral extensions of base; left extension triangular, prominent; right extension elongate, narrow. Anterior canal moderately short (much shorter than posterior canal), reflexed dorsally on some specimens (extremely so on 1 specimen), almost straight on others, sometimes bearing 2 very weak dorsal tubercles; dorsal surface of canal bearing long sulcus, obsolete on some specimens; base of canal supported by narrow elongate extensions of the base, right extension longer than left. Aperture sinuous; outer lip wide, slightly concave close to inner edge of lip, convex towards periphery of base, bearing 30–34 relatively thin but prominent teeth, well separated by interspaces about twice width of teeth; teeth fading posteriorly; inner lip with 26–28 teeth slightly wider than labial teeth, very short anteriorly, longer and slightly weaker posteriorly. Fossula broad, very slightly depressed. Base on columellar side slightly swollen in middle and concave posteriorly and anteriorly towards canals. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||
Age range: base of the Langhian to the top of the Late/Upper Miocene or 15.98000 to 5.33300 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Langhian | Australia (Victoria) | Umbilia siphonata (176299) | |
| Middle Miocene | Australia (Victoria) | Umbilia siphonata (71351 72187 72196 72197 72201) | |
| Late/Upper Miocene | Australia (New South Wales) | Umbilia siphonata (72190) |