Species
Porterfieldia humilis Hadding, 1913
Synonymy list
1913 Triarthrus Becki Green var. humilis n. var. — Hadding , pp. 69 , fig. Pl. 6:18-19
1998 Porterfieldia humilis (Hadding 1913) — Mansson , pp. 61 , fig. Fig. 14a-c
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Ptychopariida |
| Suborder | Olenina |
| Family | Olenidae |
| Superfamily | Triarthrinae |
| Genus | Porterfieldia |
| Species | humilis |