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Pyrimetopus pyrifrons
Taxonomy
Orometopus pyrifrons was named by Harrington (1938). It is not extant.
It was recombined as Pyrimetopus pyrifrons by Pribyl and Vanek (1980), Waisfeld and Vaccari (2003) and Tortello and Esteban (2014).
It was recombined as Pyrimetopus pyrifrons by Pribyl and Vanek (1980), Waisfeld and Vaccari (2003) and Tortello and Esteban (2014).
Synonymy list
Year | Name and author |
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1938 | Orometopus pyrifrons Harrington |
1957 | Orometopus pyrifrons Harrington and Leanza |
1980 | Pyrimetopus pyrifrons Pribyl and Vanek p. 44 |
2003 | Pyrimetopus pyrifrons Waisfeld and Vaccari |
2014 | Pyrimetopus pyrifrons Tortello and Esteban p. 944 |
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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.
†Pyrimetopus pyrifrons Harrington 1938
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Diagnosis
Reference | Diagnosis | |
---|---|---|
A. Pribyl and J. Vanek 1980 | Exoskeleton small, slightly convex. Cephalon semielliptical in outline,
more convex in sagittal axis than transversely. Glabella strongly convex, globose, well-defined by deep axial furrows, ovoid in outline. A smooth minute mesial node lies slightly behind the centre of glabella. Anterior pits shallow. Preoccipital part of glabella not continuing posteriorly into a spine. Preglabellar field narrow, weakly convex, sloping forward; anterior border very narrow. Fixigenae narrow (tr.), convex. Alae inconspicuous. Anterior branches of facial sutures almost subparallel, slightly diverging in front of eyes, gently curved outward; posterior branches of facial sutures sigmoidally bent, directed outward and slightly forward behind eyes. Thorax consisting of 6 segments. Axis relatively narrow, tapering backward; it is devoid of spines on the third and fourth segments. Pleurae straight, with very distal fulcrum, and wide submeidan furrow parallel to margin. Pleural extremities bend backwards, ending as short spines. Pygidium semielliptical to subtrangular in outline, elongated transversely with almost unsegmented short axis and smooth lateral regions on which only articulating facet is perceptible. Border broad sloping steeply downward. |