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Alkaidia sumralli
Taxonomy
Alkaidia sumralli was named by Blake and Reid (1998). It is not extant. Its type specimen is Texas Memorial Museum, Holotype 1786TX1, Paratype 1786TX7-9, 1786TX21-28. It is the type species of Alkaidia.
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Alkaidia sumralli Blake and Reid p. 530 figs. 9.1-9.14 |
| 2021 | Alkaidia sumralli Gale and Jagt p. 183 figs. Figs 16A–C, 17B–E, H, K |
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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.
†Alkaidia sumralli Blake and Reid 1998
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. B. Blake and R. Reid 1998 | Same as for the genus, by monotypy | |
| A.S. Gale and J.W.M. Jagt 2021 | Alkaidia in which the primary radial ossicles are elongated and the terminal ossicle is not deeply notched on its proximal margin. |
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: base of the Late/Upper Albian to the top of the Early/Lower Cenomanian or 105.30000 to 93.50000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Albian | USA (Texas) | Alkaidia sumralli (59875 59876 59878 59880) | |
| Early/Lower Cenomanian | USA (Texas) | Alkaidia sumralli (59881 59882 59883) |