Mummaspis

Mummaspis
Temporal range: late Lower Cambrian (Lower Olenellus-zone) 524–518.5 Ma
Mummaspis macer, (Type specimen), Fruitville, Lancaster County, Pennsylvania. U.S. National Museum, Catalogue No. 60092
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Redlichiida
Suborder: Olenellina
Superfamily: Olenelloidea
Family: "Laudoniidae"
Subfamily: "Laudoniinae"
Genus: Mummaspis
Fritz, 1992
species
  • M. occidens (Walcott, 1913), (type), synonyms Wanneria occidens, Esmeraldina occidens[1]
  • M. truncatooculatus (Fritz, 1992), synonym Olenellus truncatooculatus[1]
  • M. oblisooculatus Fritz, 1992[1]
  • M. muralensis (Fritz, 1992), synonym Olenellus muralensis[1]
  • M. macer (Walcott, 1913), synonyms Holmia macer, Esmeraldina macer, Wanneria macer[1]


Mummaspis is an extinct genus from a well-known class of fossil marine arthropods, the trilobites, with five known species.[1] It lived during the early part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period.

Headshield of Mummaspis occidens, type specimen. U.S. National Museum, Catalogue No. 60080

Taxonomy

Mummaspis is the genus closest to the common ancestor of Laudonia, the Biceratopsinae and the Bristoliinae. Including the species of Fritzolenellus, this clade is the sister group of Wanneria walcottana and the Holmiidae.[2]

Distribution

References

  1. 1 2 3 4 5 6 7 Lieberman, B. S. (1999). "Systematic Revision of the Olenelloidea (Trilobita, Cambrian)" (PDF). Bulletin of the Peabody Museum of Natural History 45.
  2. Lieberman, B.S. (1998). "Cladistic Analysis of the Early Cambrian Olenelloid Trilobites" (PDF). Journal of Paleontology 72 (1): 59–78.
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