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Tahulaspis
Taxonomy
Tahulaspis was named by Märss et al. (2014). It is not extant.
It was assigned to Tremataspidiformes by Märss et al. (2014).
It was assigned to Tremataspidiformes by Märss et al. (2014).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Tahulaspis Märss et al. |
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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.
G. †Tahulaspis Märss et al. 2014
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†Tahulaspis ordinata Märss et al. 2014
†Tahulaspis praevia Märss et al. 2014
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. Märss et al. 2014 | Exoskeleton thin with ridges only in early stages of development; inter-ridge grooves covered with a porous layer in later stages of development; superficial layer pierced by pores, either in regular rows or distributed unevenly, fine pores of variable sizes with diameters of 10–30 mm; exoskeleton of three layers in different degrees of development; generations of dentine in the superficial layer; well-developed vascular plexus and perforated septa of sensory canals present in the middle layer; basal layer strongly laminated. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Kiessling 2004, Carroll 1988 | |||||
Age range: base of the Paadla to the top of the Kuressaare or 426.70000 to 422.70000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Paadla | Estonia (Saare) | T. praevia (239042) | |
| Kuressaare | Estonia (Saare) | T. ordinata (238493) |