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Hesperorthis craigensis
Taxonomy
Orthis calligramma craigensis was named by Reed (1917).
It was recombined as Hesperorthis craigensis by Williams (1962) and Candela and Harper (2014).
It was recombined as Hesperorthis craigensis by Williams (1962) and Candela and Harper (2014).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Orthis calligramma craigensis Reed pp. 827 - 828 figs. Plate V, figs. 7-9 |
| 1962 | Hesperorthis craigensis Williams pp. 107 - 108 figs. Pl. IX, figs. 3, 4, 7-9, 16 |
| 2014 | Hesperorthis craigensis Candela and Harper pp. Supplement 1 |
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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.
†Hesperorthis craigensis Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Subcircular, piano-convex Hesperorthis with pedicle valve less than one-third as deep as long, brachial valve commonly slightly convex umbonaUy and faintly sulcate antero-medianly, over three-quarters as long as wide; ornamented by a variable number (most commonly 26-30) of narrowly rounded costae with a wave-length of over 0.5 mm. at 5 mm. antero-median of the dorsal umbo, ventral muscle-scar subcordate, about as long as wide and extending anteriorly for about one-third the length of the pedicle valve. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013, Hendy 2009 | |||||