Carabidae ConjunctaeDavid R. Maddison
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CharacteristicsThis informal group of carabids is characterized by a derived feature of their middle coxal cavities, in which the mesosternum and metasternum surround the mesocoxae, forming both the mesal and lateral walls of the coxae. Such mesocoxal cavities are called "conjunct", and they give this group its name. In contrast, most carabids outside of this group have disjunct mesocoxal cavities, in which the the lateral wall of the cavity is formed in part by the mesepimeron (the sterna thus being disjunct on the lateral wall of the cavity). Outside of the Carabidae Conjunctae, the only carabids with conjunct mesocoxal cavities are the Notiophilini and some Paussini (Kavanaugh and Nègre, 1982; Beutel, 1991).
In addition, the posterior edge of the metepimeron of these carabids is lobed, and partly overlaps the first visible abdominal sternum.
Maddison, D.R., M.D. Baker, and K.A. Ober. 1999. Phylogeny of carabid beetles as inferred from 18S ribosomal DNA (Coleoptera: Carabidae). Systematic Entomology, 24:103-138.
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David R. Maddison
Oregon State University
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- Content changed 06 January 2012
Citing this page:
Maddison, David R. 2012. Carabidae Conjunctae. Version 06 January 2012 (under construction). http://tolweb.org/Carabidae_Conjunctae/66/2012.01.06 in The Tree of Life Web Project, http://tolweb.org/