Marrella

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Kingdom: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: incertae sedis
Classis: †Marrellomorpha
Ordo: †Marrellida
Genus: †
Species: †M. splendens

Marrella Walcott, 1912: 192

Type species: Marrella splendens Walcott, 1912, by original designation.

• Walcott, C.D. 1912. Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. In: Cambrian geology and paleontology. II. Smithsonian Miscellaneous Collections 57(6): 145–228, pls. 24–34, text figs. 8–10. BHL. Reference page. 

• García-Bellido, D.C. & Collins, D.H. 2006. A new study of Marrella splendens (Arthropoda, Marrellomorpha) from the Middle Cambrian Burgess Shale, British Columbia, Canada. Canadian Journal of Earth Sciences 43(6): 721–742. DOI: 10.1139/e06-012 . ResearchGate . Reference page. 
• Simonetta, A.M. 1962. Note sugli Artropodi non Trilobiti della Burgess Shale, Cambriano medio della Columbia Britannica (Canada). 1° contributo: il genere Marrella Walcott 1912. Monitore Zoologico Italiano 69(3–4): 172–185. [not seen]
• Whittington, H.B. 1971. Redescription of Marrella splendens (Trilobitoidea) from the Burgess Shale, Middle Cambrian, British Columbia. Geological Survey of Canada, Bulletin 209: 1–24. DOI: 10.4095/102427 .