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Semizona glindmeyeri
Taxonomy
Clathrospira glindmeyeri was named by Rohr (1996). Its type specimen is USNM 485263, a shell, and it is a 3D body fossil.
It was recombined as Semizona glindmeyeri by Ebbestad and Peel (2001), Wagner (2023).
It was recombined as Semizona glindmeyeri by Ebbestad and Peel (2001), Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Clathrospira glindmeyeri Rohr p. 59 figs. 2.11-2.17, 2.23 |
| 2001 | Semizona glindmeyeri Ebbestad and Peel pp. 378 - 380 |
| 2023 | Semizona glindmeyeri Wagner p. 2064 |
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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.
†Semizona glindmeyeri Rohr 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. M. Rohr 1996 | Turbiniform, conical shells with apical angle about 93 degrees; narrowly phaneromphalous; shallow slit at periphery produces selenizone with thread bordering upper edge only; outer whorl surface convex except just above carina where concave; growth lines strongly prosocline above selenizone then opisthocline on base changing to gently prosocline near umbilicus.
Turbiniform, relatively thin shell with conical spire, apical angle 80-95 degrees (average 93 degrees); narrowly phaneromphalous; whorl embraces previous whorl at lower outer periphery producing weak suture; only upper part of selenizone exposed in previous whorls; outer whorl surface convex except just above carina where concave, then convex around base and curving sharply into narrow umbilicus; growth lines strongly prosocline to periphery where shallow U-shaped slit is present; narrow selenizone on carina; growth lines strongly convex forward just below selenizone then opisthocline on base changing to gently prosocline near umbilicus; strong growth lines in umbilicus of some specimens; larger shells weakly varicose in later growth stages. |
Measurements
No measurements are available
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| Source: superf = superfamily, o = order | |||||
| References: Wagner 2023, Bambach et al. 2007 | |||||
Age range: Whiterockian or 471.30000 to 457.30000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Whiterockian | USA (Nevada) | Clathrospira glindmeyeri (14232 14238 14241) Clathrospira sp. (104449) Trochonema indet. (13605) |