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Alokistocare subcoronatum
Taxonomy
Conocephalites subcoronatus was named by Hall and Whitfield (1877). Its type specimen is USNM 15442 and is a 3D body fossil. It is the type species of Alokistocare.
It was recombined as Ptychoparia subcoronata by Walcott (1886), Walcott (1891); it was recombined as Alokistocare subcoronatum by Lorenz (1906), Walcott (1916), Resser (1935), Palmer (1954), Sundberg (1999).
It was recombined as Ptychoparia subcoronata by Walcott (1886), Walcott (1891); it was recombined as Alokistocare subcoronatum by Lorenz (1906), Walcott (1916), Resser (1935), Palmer (1954), Sundberg (1999).
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
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1877 | Conocephalites subcoronatus Hall and Whitfield p. 237 figs. pi. 2, fig. 1 |
1886 | Ptychoparia subcoronata Walcott figs. pi. 28, fig. 4 |
1891 | Ptychoparia subcoronata Walcott p. 96 figs. fig. 6 |
1906 | Alokistocare subcoronatum Lorenz p. 62 |
1916 | Alokistocare subcoronatum Walcott p. 187 figs. pi. 25, fig. 2 |
1935 | Alokistocare subcoronatum Resser p. 6 |
1954 | Alokistocare subcoronatum Palmer p. 72 figs. Plate 15, figure 8 |
1999 | Alokistocare subcoronatum Sundberg pp. 1132 - 1138 figs. Figures 5.1-5.7, 6.1-6.14, 7 |
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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.
†Alokistocare subcoronatum Hall and Whitfield 1877
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Diagnosis
Reference | Diagnosis | |
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F. A. Sundberg 1999 | Glabella with a bluntly rounded to rounded frontal lobe. Anterior border concave, long (27 ± 3 percent cranidial length), wide (86 ± 7 percent cranidial width). Fixigena moderately wide (62 ± 4 percent glabellar width), posterior area of fixigena broad (51 ± 6 percent glabellar width). Circular medial swelling on the preglabellar area and crossing onto the anterior border. |
Measurements
No measurements are available
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Source: g = genus, f = family, c = class | |||||
References: Aberhan et al. 2004, Hendy 2009 |
Age range: Middle Cambrian or 506.50000 to 497.00000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Middle Cambrian | USA (Utah) | Alokistocare subcoronatum (64529) |