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Dalaspis obsoleta
Taxonomy
Acidaspis obsoleta was named by Van Ingen (1901) [Lectotype designated by Holloway (2021).]. Its type specimen is PU 57687a, a cephalon/head, and it is a 3D body fossil.
It was recombined as Dalaspis obsoleta by Holloway (2021).
It was recombined as Dalaspis obsoleta by Holloway (2021).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1901 | Acidaspis obsoleta Van Ingen p. 51 figs. text-figs 13, 14 |
| 2021 | Dalaspis obsoleta Holloway pp. 89 - 91 figs. Plate 8, Figs 11– 21 |
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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.
†Dalaspis obsoleta Van Ingen 1901
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. J. Holloway 2021 | Cephalon distinctly effaced; axial furrow faint; occipital furrow apparently not defined medially; L1 and L2 almost lacking independent convexity and merging with median glabellar lobe, L3 not distinguishable. Anterior and lateral borders broad, weakly concave inside narrow, raised outer rim, with at least 17 pairs of border spines; lateral border curves strongly upwards posteriorly, vertical or even curving forwards slightly immediately below genal spine; lateral border furrow very shallow but containing a row of deeper pits. Eye not strongly raised on cheek, much lower than adjacent median part of glabella. Dorsal surface of cephalon and pygidium smooth apart from sparse, weak granules on genal field and pygidium, weak dimpling on genal field, and distally directed, spinose tubercles on genal spine. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004 | |||||