| 词条 | Mesonacinae |
| 释义 |
| fossil_range = {{fossilrange|516|513}}Botomian | image = Mesonacis_vermontanus.jpg | image_upright = 0.8 | image_caption = Mesonacis vermontanus, late Lower Cambrian, Australia, Courtesy of Sam Gon III. | regnum = Animalia | phylum = Arthropoda | classis = Trilobita | ordo = Redlichiida | familia = Olenellidae | subfamilia = Mesonacinae | subfamilia_authority = Walcott, 1890 | subdivision_ranks = Genera | subdivision =
}} The Mesonacinae comprise an extinct subfamily of trilobites that lived during the Botomian, found in North-America, Greenland and North-Western Scotland. The two genera in this subfamily are Mesonacis and Mesolenellus.[1] References1. ^1 2 {{cite journal|last1= Lieberman|first1=B.S.|year=1999|title=Systematic Revision of the Olenelloidea (Trilobita, Cambrian)|journal=Bulletin of the Peabody Museum of Natural History|volume=45|url= http://peabody.yale.edu/sites/default/files/documents/scientific-publications/ypmB45_1999.pdf}} 2. ^{{citation|last1=Palmer|first1=A.R.|last2=Repina|first2=L.N.|year=1993|title=Through a Glass Darkly: Taxonomy, Phylogeny and Biostratigraphy of the Olenellina|journal=The University of Kansas Paleontological Contributions|volume=3|pages=1–35|url=http://kuscholarworks.ku.edu/dspace/handle/1808/3760}} External links
4 : Olenellidae|Cambrian trilobites|Cambrian Series 2 first appearances|Cambrian Series 2 extinctions |
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