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Coosia pernamagna
Taxonomy
Coosia pernamagna was named by Wilson (1954). Its type specimen is CW-246, a cephalon/head (cranidium), and it is not a trace fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Coosia pernamagna Wilson p. 267 figs. pl. 24 f. 1-2, 7, 10 |
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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.
†Coosia pernamagna Wilson 1954
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J.L. Wilson 1954 | Coosia with glabella and occipital ring about three-fourths of total axial length of cranidium; glabella elevated and convex but frontal area flat, rather short compared to that of other species, except C. robusta. Border about four times axial length of brim, separated from it by a well-defined marginal furrow; border bears no secondary (false) marginal furrow. Fixed cheeks about one-fifth basal width of glabella, palpebral lobes on or anterior to center of glabella, relatively small for the genus. Most distinctive specific feature is broad backcurvin- g .po sterior limbs.
Facial sutures cut anterior margin of cephalon away from axis, converge slightly anterior to eye and behind same trend outward obliquely a t about 60" to longitudinal axis. Pygidium almost quadrate, pleural platforms elevated and convex, axis half or less than half total axial length, bears three or four segments plus rounded terminal. Posterior border flat and unsegmented, marginal inbend present a t axis. |