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| Title | Identification of New World Agonum, review of the Mexican fauna, and description of Incagonum, new genus, from South America (Coleoptera: Carabidae: Platynini) |
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| Abstract | A key for the identification of the 74 species of Agonum Bonelli in the New World is presented along with taxonomic treatments of the 15 species occurring in Mexico. Neotypes are designated for Agonum orbicollis Say (=A. punctiforme Say) and Agonum suturale Say. Diagnosis of Agonum based on external characters, and characters of the male and female genitalia and reproductive tract, necessitates removal of South American species previously considered congeneric to a new genus, Incagonum (type species Anchomenus discoculcatus Dejean). Synapomorphies establishing monophyly of Incagonum include reduced subapical elytral sinuation, and female spermatheca with digitate basal lobe. The absence of subapical setae on metatarsomere 4, and presence of a short but distinct spermathecal duct support the monophyly of Incagonum plus other taxa in the previously proposed Rhadine-Tanystoma lineage. Removal of Incagonum species from Agonum results in restriction of Agonum to lands previously comprising Laurasia, or to regions broadly accreted to its southern margin. Cladistic biogeographic analysis of the Mexican Agonum fauna and other carabid taxa exhibiting Halffer's Nearctic pattern do not contradict a primary division of the Mexican biota into a northern portion, including the Sierra Madre Occidental and Oriental and associated lowland regions, and a southern portion including the Transvolcanic Sierra and Sierra Madre del Sur. The analysis recognizes an area of endemism comprising the southern Sierra Madre Occidental. This area exhibits ambiguous area relationships with areas to the north and south. The included Nearctic pattern taxa also provide only ambiguous information concerning the area relationships for areas north of the Isthmus of Tehuantepec versus the Chiapan highlands. |
| Author(s) | James K Liebherr |
| Journal | Journal of the New York Entomological Society |
| ISSN | 0028-7199 |
| Volume | 102 |
| Issue | 1 |
| Pages | 1--55 |
| JSTOR | 25010051 |
| Year | 1994 |
| Citation |
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Only known citations between publications in BioNames are listed here.
Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico
by Yves BousquetZooKeys 245 pages 1--1630 (2012)- 10.3897/zookeys.245.3416