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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Minastirithella silivreni
Taxonomy
Minastirithella silivreni was named by Jacquet and Brock (2016). Its type specimen is SAM P14579, a shell, and it is a 3D body fossil. It is the type species of Minastirithella.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Minastirithella silivreni Jacquet and Brock p. 352 fig. 9 |
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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.
†Minastirithella silivreni Jacquet and Brock 2016
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. M. Jacquet and G. A. Brock 2016 | Patelliform univalve, shell narrowest near the apical margin, with pyriform to ovoid outline. Width to length ratio between 0.58 and 0.98 (average 0.74, n = 17), with maximum length 24.8 mm and width 14.5mm. Profile moderate in most complete, uncompressed specimens (maximum H:L ratio of 0.68). Blunt apex, located approximately 3/4 sagittally from the supra-apical margin and is sheared off in most specimens. In lateral profile, supra-apical surface is evenly and gently convex, sub-apical surface is short and steeply convex with slope at approximately 45° between the apex and sub-apical margin. First order concentric ornament consists of up to 12 angular grooved rugae; on the broad supra-apical surface each ruga forms a relatively high amplitude concentric ridge with either a flat ledge or a steep exterior face adjacent to a shallow narrow groove. On sub-apical and lateral surfaces, rugae form more vertical grooved faces. Bifurcating rugae are common due to the rapid expansion of the supra-apical surface. Fine scale radial ornament is present in well preserved specimens and forms very narrow (b40 μm wide) regularly spaced (approximately 6 per millimetre in apertural rugae) lirae along the face of the concentric rugae, and can appear wrinkle-like in taphonomically altered forms. Internal muscle scars unknown. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy 2009, Hendy et al. 2009 | |||||
Age range: Atdabanian or 521.00000 to 516.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Atdabanian | Australia (South Australia) | Minastirithella silivreni (172583) |