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Harpida

Trilobita - Harpida

Taxonomy
Harpina was named as an order.

It was reranked as the suborder Harpina by Fortey (1990); it was synonymized subjectively with Harpetida by Ebach and McNamara (2002); it was corrected as Harpida by Adrain (2011).

It was assigned to Ptychopariida by Harrington and Leanza (1957), Fortey (1990) and Sepkoski (1998); and to Trilobita by Adrain (2011).

Synonymy list
YearName and author
1957Harpina Harrington and Leanza
1990Harpina Fortey p. 562
1998Harpina Sepkoski
2011Harpida Adrain p. 107

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderHarpida
orderHarpida

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.

Diagnosis
ReferenceDiagnosis
R. A. Fortey 1990Libristoma having small eyes placed anteriorly relative to glabella; cephalon broadly convex (sag. tr.) with long preglabellar area, and often a brim, with stout genal spines or genal prolongations of the brim; free cheeks narrow (tr.) or lost altogether, fused together; thoracic segments numerous (12 or more) and characteristically narrow (sag.) with long pleurae in contact along their length; pygidium relatively small and often transverse.