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Huttagraptus
Taxonomy
Huttagraptus was named by Bjerreskov and Koren' (1997).
It was assigned to Monograptidae by Bjerreskov and Koren' (1997).
It was assigned to Monograptidae by Bjerreskov and Koren' (1997).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Huttagraptus Bjerreskov and Koren' pp. 13 - 15 |
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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. †Huttagraptus Bjerreskov and Koren' 1997
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†Huttagraptus acinaces Törnquist 1899
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Bjerreskov and T. Koren' 1997 | Species possessing a long and slender
rhabdosome with strong to slight dorsal curvature. Thecae geniculate in proximal or mesial parts of the rhabdosome, in some species throughout the whole rhabdosome. Pronounced geniculum may have genicular flanges overhanging apertures. Proximal thecae with straight horizontal apertures, semicircular or slitlike excavations; metathecal ventral walls are parallel or slightly inclined to the dorsal side of the rhabdosome. Gradual changes such as lessening of geniculum, increase in thecal inclination (up to 5°-10°) and inversion of thecal apertures take place towards the distal end. Sicula usually long (more than 3 mm) with high position for the origin of thl. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Age range: base of the Rhuddanian to the top of the Aeronian or 443.10000 to 438.60000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhuddanian | China (Guizhou) | Lagarograptus acinaces (151959) | |
| Rhuddanian | United Kingdom (Wales) | Lagarograptus acinaces (145220) | |
| Rhuddanian | Denmark (Bornholm) | Monograptus acinaces (13706 13707) | |
| Rhuddanian | United Kingdom | Lagarograptus acinaces (145219) | |
| Rhuddanian | France | H. solidus (145541 145542 145543 145544 145545 145546 145547 145548) | |
| Llandovery | USA (Alaska) | Monograptus acinaces (145587 145589 145590) | |
| Aeronian | Canada (Northwest Territories) | Lagarograptus acinaces (235805) |