Callavia

Callavia is an extinct, monotypic genus of trilobite arthropods. C. broegeri lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period[3] in what are today Canada and the United States.

Callavia
Temporal range: Atdabanian
↓
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Redlichiida
Suborder:
Olenellina
Superfamily:
Judomioidea[1][2]
Genus:
Callavia

Matthew, 1897
Species:
C. broegeri
Binomial name
Callavia broegeri
(Walcott, 1890)
Synonyms
  • Callavia crosbyi
  • Nevadia crosbyi
  • Olenellus (Holmia) broegeri
  • Olenellus (Mesonacis) broegeri

Taxonomy

The position of Callavia in relation to other Olenellina has shifted repeatedly over time. Initially it was assigned to the Holmiinae by Pierre Hupé, and was later moved back and forth to the Callaviinae.[4] Lieberman, however, argues Callavia is a basal member of the Judomioidea.[2]

Reassigned species

Distribution

C. broegeri is known from the Lower Cambrian of Newfoundland (Brigus Formation, Branchian Series, Conception Bay), Nova Scotia (between Docters Brook and Malignant Brook, northernmost Antigonish Highlands), Canada, and Massachusetts, USA (Weymouth Formation, Pearl street, North Weymouth, Mill Cove, Norfolk County).

Ecology

C. broegeri occurs together with lampshells Sunnaginia imbricata and Eccentrotheca kanesia, and the agnostid Serrodiscus bellimarginatus.[5][6]

See also

References
  1. Lieberman, B.S. (1998). "Cladistic Analysis of the Early Cambrian Olenelloid Trilobites" (PDF). Journal of Paleontology. 72 (1): 59–78. doi:10.1017/S0022336000024021.
  2. Lieberman, B.S. (2001). "Phylogenetic analysis of the Olenellina Walcott, 1890 (Trilobita, Cambrian)". Journal of Paleontology. 75 (1): 96–115. doi:10.1666/0022-3360(2001)075<0096:PAOTOW>2.0.CO;2.
  3. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2006-09-05. Retrieved 2008-01-12.
  4. Palmer, A.R.; Repina, L.N. (1993), "Through a Glass Darkly: Taxonomy, Phylogeny and Biostratigraphy of the Olenellina", The University of Kansas Paleontological Contributions, 3: 1–35
  5. Landing, E. (1995). "Upper Placentian-Branchian series of mainland Nova Scotia (middle-upper Lower Cambrian) faunas, paleoenvironments, and stratigraphic revision". Journal of Paleontology. 69 (3): 475–495. doi:10.1017/S0022336000034879. JSTOR 1306322.
  6. Paleobiology Database
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