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Monotrabs
Taxonomy
Monotrabs was named by Baumgartner (1984) [emend. O’Dogherty, Gorican and Dumitrica. 2005.
].
It was assigned to Hagiastridae by O'Dogherty et al. (2006).
It was assigned to Hagiastridae by O'Dogherty et al. (2006).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Monotrabs Baumgartner |
| 2006 | Monotrabs O'Dogherty et al. p. 464 |
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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. †Monotrabs Baumgartner 1984
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. O'Dogherty et al. 2006 | Emended diagnosis(by L. O'Dogherty, S. Gorican, P. Dumitrica. 2005): Tritrabid with rays composed of 8 strongly developed external beams in the cortical shell connected by diagonally arranged bars forming 2 rows of alternating circular to triangular pores between adjacent beams. Cross section of rays with 4 primary, 8 secondary and 8 tertiary canals. Ray tip usually knobbed with two laterally directed spines. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range: base of the Middle Bathonian to the top of the Callovian or 168.20000 to 161.50000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Bathonian | Switzerland | M. pseudoewingi, M. plenoides (66939) | |
| Callovian | Italy | M. goricanae (89642 89643) M. plenoides (89639 89640) | |
| Late/Upper Callovian - Middle Oxfordian | Greece | M. plenoides (47839) |