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Pachycrommium clarki
Taxonomy
Amaurellina (Euspirocrommium) clarki was named by Stewart (1927) [DISTRIBUTION: Early Eocene; California, Mexico.]. Its type specimen is UCMP 31385, a shell, and it is a 3D body fossil.
It was recombined as Amaurellina clarki by Gardner and Bowles (1934); it was recombined as Pachycrommium clarki by Marincovich (1977), Squires (1984), Squires (1987), Squires (1988), Squires and Demetrion (1992), Squires (1999) and Perrilliat et al. (2006).
It was recombined as Amaurellina clarki by Gardner and Bowles (1934); it was recombined as Pachycrommium clarki by Marincovich (1977), Squires (1984), Squires (1987), Squires (1988), Squires and Demetrion (1992), Squires (1999) and Perrilliat et al. (2006).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1927 | Amaurellina (Euspirocrommium) clarki Stewart pp. 336-338 figs. pl. 26, figs. 8, 9 |
| 1934 | Amaurellina clarki Gardner and Bowles p. 246 |
| 1938 | Amaurellina (Euspirocrommium) clarki Turner p. 86 |
| 1939 | Amaurellina multiangulata Vokes p. 174 figs. plate 22, fig. 2, 8, 13 |
| 1977 | Pachycrommium clarki Marincovich p. 238 |
| 1984 | Pachycrommium clarki Squires p. 24 figs. Figure 7e |
| 1987 | Pachycrommium clarki Squires p. 36 fig. 44 |
| 1988 | Pachycrommium clarki Squires p. 12 fig. 25 |
| 1992 | Pachycrommium clarki Squires and Demetrion p. 32 |
| 1999 | Pachycrommium clarki Squires p. 18 figs. Figures 35, 36 |
| 2006 | Pachycrommium clarki Perrilliat et al. p. 159 |
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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.
†Pachycrommium clarki Stewart 1927
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Invalid names: Amaurellina multiangulata Vokes 1939 [synonym]
Diagnosis
No diagnoses are available