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Forsia
Taxonomy
Forsia was named by Saul (1988) [Sepkoski's age data: K Maes Sepkoski's reference number: 1212]. Its type is Forsia baia.
It was assigned to Perissityidae by Saul (1988); and to Neogastropoda by Sepkoski (2002).
It was assigned to Perissityidae by Saul (1988); and to Neogastropoda by Sepkoski (2002).
Species
Entered
by J. Sepkoski on 2003-01-23; modified by J. Marcot on 2020-11-19
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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. †Forsia Saul 1988
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†Forsia baia Saul 1988
†Forsia lorda Saul 1988
†Forsia popenoei Saul 1988
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. R. Saul 1988 | Turriculate perissityids that have a long slender abaperturally flexed anterior canal. They are sculptured by spiral threads that are most prominent on the noded angulate periphery. The growth line is shallowly sinused on the ramp, opisthocline across the noded peripheral angulation, and broadly antisinused on the siphonal neck. The aperture is elliptical. The flared outer lip has a strong, rounded varix that bears within a tooth anterior to the posterior notch, two strong teeth at the periphery, and a variable number of denticles adjacent to the anterior siphonal canal. The inner lip is clearly demarked, of moderate width, and has a parietal ridge or row of small denticles and two strong parallel horizontal pseudofolds nearly opposite the two strongest teeth of the outer lip. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Late/Upper Santonian to the top of the Middle Campanian or 85.70000 to 72.20000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Santonian | USA (California) | F. lorda (69307 207435 215315) | |
| Late/Upper Santonian | USA (California) | F. lorda (215319) | |
| Santonian | USA (California) | F. lorda (86780 86781 86955) | |
| Early/Lower Campanian | USA (California) | F. baia (3885 69312 86939) F. popenoei (86936) | |
| Middle Campanian | USA (California) | F. popenoei (185174) | |
| Middle Campanian | USA (Washington) | F. popenoei (210588) |