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Fardenia filistriata
Taxonomy
Fardenia filistriata was named by Boucot et al. (1972) [Boucot & Johnson in Boucot, Johnson & Shagam, 1972]. It is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Fardenia filistriata Boucot et al. pp. 621-622 figs. Pl. 13, figs. 1-16. |
| 1976 | Fardenia filistriata Isaacson et al. p. 1110 figs. P1. 1, figs. 1-6 |
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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.
†Fardenia filistriata Boucot et al. 1972
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. E. Isaacson et al. 1976 | Exterior.--Shell unequally biconvex. Maximum convexity of both valves near posterior margin. Hinge line straight and equal to maximum width of shell. Width approximately twice the length in larger specimen. Width to length ratio larger in smaller specimen. Anterior commissure faintly sulcate. Surface of both valves marked by numerous (approximately 50-60 at anterior margin, in large specimen) costellae. Costellae narrowly v-shaped, with similar vshaped interspaces. Costellae alternating in size by pairs, and increase in number by bifurcation at approximately one-half the distance from the posterior margin. Shell length 6.5-11.6 mm. Shell width 9.5-17.0 mm.
Dorsal interior.-Chilidium prominent, erect. Cardinal process poorly preserved. Adductor muscle scars somewhat elongate and widely separated by low myophragm. |
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Llandovery or 443.10000 to 432.90000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Llandovery | Argentina (Salta) | Fardenia filistriata (2866) | |
| Llandovery | Argentina | Fardenia filistriata (25072) | |
| Llandovery | Venezuela | Fardenia filistriata (25068) |