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Scutellum protrusifrons

Trilobita - Corynexochida - Styginidae

Discussion

e.p. 1927 Scutellum costatum PUSCH - MAILLIEUX, p. 79 [only Boussu-en-Fagne, carrire du cimetire]. 2007 Scutellum sp. H - Basse et al., p. 312, figs 1-3.

Taxonomy
Scutellum protrusifrons was named by Van Viersen and Prescher (2011). Its type specimen is IRSNB al2796, a cephalon/head, and it is a 3D body fossil. Its type locality is Boussu-en-Fagne cemetery quarry, which is in a Frasnian coastal shale in the Grands Breux Formation of Belgium.

Synonymy list
YearName and author
2011Scutellum protrusifrons Van Viersen and Prescher pp. 56 - 59 fig. 2

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderCorynexochida
familyStyginidaeVogdes 1890
genusScutellumPusch 1833
speciesprotrusifrons

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.

Scutellum protrusifrons Van Viersen and Prescher 2011
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Diagnosis
ReferenceDiagnosis
A. P. Van Viersen and H. Prescher 2011A species of Scutellum with a combination of the following features: anterior border of cranidium protruding slightly (in smaller specimens) to distinctly (in large specimens) from cephalic outline along with anterior margin of glabella. Frontal glabellar lobe laterally expanded; having indistinct, rounded anterolateral corners. S3 weakly impressed, especially abaxially. Small eyes. Abaxial half of lateral portion of pygidium distinctly protrudes laterally from parabolic outline of axis. Of all ribs, pair adjacent to median rib has narrowest proximal half. Interpleural furrows widening quickly between anterior pleural ribs but widening from nearby margin of elevated central area of pygidium between remaining ribs.