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Trilonche echinata
Taxonomy
Heliosoma echinata was named by Hinde (1899). It is a 3D body fossil.
It was recombined as Xiphosphaera echinata by Byokova (1955); it was recombined as Entactinosphaera echinata by Nazarov and Ormiston (1983) and Aitchison (1993); it was recombined as Trilonche echinata by Aitchison et al. (1999) and Wang et al. (2003).
It was recombined as Xiphosphaera echinata by Byokova (1955); it was recombined as Entactinosphaera echinata by Nazarov and Ormiston (1983) and Aitchison (1993); it was recombined as Trilonche echinata by Aitchison et al. (1999) and Wang et al. (2003).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1899 | Heliosoma echinata Hinde p. 50 figs. pl. 9, figs. 1, 2 |
| 1955 | Xiphosphaera echinata Byokova |
| 1983 | Entactinosphaera echinata Nazarov and Ormiston |
| 1993 | Entactinosphaera echinata Aitchison |
| 1999 | Trilonche echinata Aitchison et al. p. 145 |
| 2003 | Trilonche echinata Wang et al. p. 133 |
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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.
†Trilonche echinata Hinde 1899
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Y. Wang et al. 2003 | Two concentric spherical lattice shells with approximately six three-bladed main spines of variable width and length. By-spines are common but are variable and typically thorn-like. One main spine is typically substantially longer and more robust than the others. An internal six-rayed spicule is present within the inner shell. |