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Spongiostoma
Taxonomy
Spongiostoma was named by Carter et al. (1988).
It was synonymized subjectively with Bernoullius by O'Dogherty et al. (2009).
It was assigned to Orbiculiformidae by Carter et al. (1988).
It was synonymized subjectively with Bernoullius by O'Dogherty et al. (2009).
It was assigned to Orbiculiformidae by Carter et al. (1988).
Synonymy list
| Year | Name and author |
|---|---|
| 1988 | Spongiostoma Carter et al. p. 44 |
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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. †Spongiostoma Carter et al. 1988
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E.S. Carter et al. 1988 | Test disc-shaped, circular to subcircular with two large, closely spaced primary spines (both arising within a fifth to a seventh of the circumference); with or without secondary spines. Meshwork concentrically arranged. Spongy layers gape open from hinge area (beginning at base of primary spines) |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range: base of the Early/Lower Toarcian to the top of the Early/Lower Bajocian or 183.00000 to 168.40000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Toarcian | Japan | S. sp. B (51710) | |
| Late/Upper Aalenian | Japan | S. sp. B (51712) | |
| Early/Lower Bajocian | Japan | S. sp. B (51713) | |
| Late/Upper Bajocian | Japan | S. sp. B (51714) |