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Siphonophrentis (Breviphrentis) invaginatus
Taxonomy
Amplexus invaginatus was named by Stumm (1937). Its type specimen is USNM 94443 and is a 3D body fossil. It is the type species of Breviphrentis.
It was recombined as Siphonophrentis (Breviphrentis) invaginatus by Merriam (1974), McAllister (1974).
It was recombined as Siphonophrentis (Breviphrentis) invaginatus by Merriam (1974), McAllister (1974).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Amplexus invaginatus Stumm p. 427 figs. Pl. 53, fig. 2; PL. 54, figs. 2a - c |
| 1974 | Siphonophrentis (Breviphrentis) invaginatus McAllister p. 11 |
| 1974 | Siphonophrentis (Breviphrentis) invaginatus Merriam p. 42 figs. Plate 15, figures 1-11; plate 16, figures 1-13,15,16; plate 17, figures 12, 13. |
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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.
†Siphonophrentis (Breviphrentis) invaginatus Stumm 1937
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Merriam 1974 | This Siphonophrentis has an elongate
subcylindrical mature growth habit with several re- juvenescence constrictions. Septal stereozone is nar- row to fairly wide. The axial extensions of septa are amplexoid, and the narrow cardinal fossula is either vague or well defined in mature growth stages. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Early/Lower Emsian to the top of the Late/Upper Emsian or 410.62000 to 393.47000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Emsian | USA (Nevada) | Siphonophrentis invaginatus (90944) | |
| Emsian | USA (California) | Siphonophrentis invaginatus (225991 225992) | |
| Late/Upper Emsian | USA (Nevada) | Breviphrentis invaginatus (90950) Siphonophrentis invaginatus (90939) | |
| Late/Upper Emsian | USA (California) | Siphonophrentis invaginatus (225967 225995 225996) |