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Kawina prolificus
Taxonomy
Cheirurus prolificus was named by Billings (1865). Its type specimen is GSC 687, a cephalon/head, and it is a 3D body fossil.
It was recombined as Cydonocephalus prolificus by Whittington (1963); it was recombined as Kawina prolificus by Adrain and Fortey (1997) and Congreve and Lieberman (2011).
It was recombined as Cydonocephalus prolificus by Whittington (1963); it was recombined as Kawina prolificus by Adrain and Fortey (1997) and Congreve and Lieberman (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1865 | Cheirurus prolificus Billings pp. 285 - 286 fig. 273 |
| 1963 | Cydonocephalus prolificus Whittington pp. 101 - 102 figs. Plate 28, figures 12-15 ; Plate 29, figures 16, 17 : Plate 30, figures 1-10 |
| 1997 | Kawina prolificus Adrain and Fortey pp. 92, 94 |
| 2011 | Kawina prolificus Congreve and Lieberman pp. Table S1 |
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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.
†Kawina prolificus Billings 1865
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Billings 1865 | Head short, convex, about quarter of a sphere; cheeks triangular, drooping, rounded at the angles; glabella co~ica.l, narrowly rounded in front, sides gently convex, neck furrow extending all across, three pairs of glabellar furrows, the last with the inner extremities separated by & littJe les8 tlum one-third the width, the others a little shorter, all slightly curved, the convex side forwards. The eyes are small and opposite the second lobe from the neck furrow, and a little nearer the side of the glabella. than to the centre of the cheek. The posterior and outer cheek margins have a. narrow elevated rim. Surface of cheeks and glahell' finely tuberculated. | |
| H. B. Whittington 1963 | Cephala ranging in length (sag.) from 1.4 (PI. 30, figs. 7-9) to 8.0 mm., the holotype being 6 mm. Glabella in dorsal aspect and longitudinal profile most like that of C. torulus (compare PI. 28, figs. 12-15 with 5-8), length and curvature of lateral glabellar furrows and amount of inflation of lateral lobes similar to this same species; the glabella of C. prolificus differs from that of C. torulus in that the outline in dorsal aspect is more squat and the longitudinal profile more flattened posteriorly. Eye lobe is similar in size but situated further forward, opposite about midlength of lateral glabellar lobe 2p. Fixigenal spine in large cephala (PI. 29, fig. 16) short and blunt. The curvature of the anterior border and rostral plate in ventral view is less than that of C. torulus. The form of the lateral border of the cheek distinguishes this species from all others. Along a line joining the extremities of the two branches of the suture the cheek is flexed down sharplj^ ; outside this flexure the border is broad and slopes steeply downward and outward, the margin sharp since the exoskeleton is turned abruptly underneath so that the doublure lies close beneath the border. External surface finely granulate, a few scattered small tubercles, these being most abundant on the cheek and border outside the eye lobe. |