Primitive carrion beetles
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.
You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.close box
The small family Agyrtidae is temperate in distribution, extending into mountainous areas of Mexico and Asia. Seven of the eight genera are restricted to the northern hemisphere, and the eighth is endemic to New Zealand. Although Agyrtidae was first recognized as a separate family by Thomson (1859), most authors placed its current members in a broadly defined Silphidae until Lawrence and Newton (1982) resurrected it as a family closely related to Leiodidae rather than Silphidae. Newton (1991) reviewed the scanty knowledge of agyrtid larvae and later (1997) presented the present classification into three subfamilies along with a review of the morphology, relationships, biology, and distribution of the group.
Lawrence, J. F. & Newton, A. F., Jr. 1982. Evolution and classification of beetles. Annual Review of Ecology and Systematics 13: 261-290.
Newton, A. F., Jr. 1991. Agyrtidae (Staphylinoidea), pp. 324-327. In: An introduction to immature insects of North America. Ed., F. W. Stehr. Vol. 2. Kendall/Hunt Publishing Co., Dubuque, Iowa, xvi + 975 pp.
Newton, A. F. 1997. Review of Agyrtidae (Coleoptera), with a new genus and species from New Zealand. - Annales Zoologici 47: 111-156.
Newton, A. F. 2005 (in press). 11. Staphylinoidea. 11.3. Agyrtidae Thomson, 1859. In: Coleoptera, Vol. I. Morphology and Systematics (Archostemata, Adephaga, Myxophaga, Polyphaga partim). Handbook of Zoology Vol. IV, Arthropoda: Insecta (ed. by Kristensen, N.P. & Beutel, R.G., vol. ed. by Beutel, R.G. & Leschen, R.A.B.). De Gruyter, Berlin, New York.
Peck, S. B. 2001. Agyrtidae. pp. 247-249 in Arnett, R.H., Jr., and M. C. Thomas. (eds.). American Beetles. Volume 1. Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia. CRC Press LLC, Boca Raton, FL. xvi + 443 pp.
Thomson, C. G. 1859. Skandinaviens Coleoptera, synoptiskt bearbetade. Vol. 1. Berlingska Boktryckeriet, Lund. 290 pp.