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Rhyssemus Mulsant 1842
Rhyssemus Mulsant 1842: 314.

Rhyssemus germanus (Linnaeus)
Photo by Paul Skelley.


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Type species. Ptinus germanus Linnaeus 1767: 566, by subsequent designation.
               = Boucardius Petrovitz 1967: 395. Type species: Boucardius                madagassus Petrovitz 1967: 396, by original designation.

Diagnosis. Body length 2.7-4.2 mm, elongate, reddish-brown to black, dorsal surfaces strongly alutaceous, granulate, glabrous. Head surface granulate, frontal suture indistinct. Clypeus rounded or toothed each side of median emargination. Pronotum with 4 grooves and 5 variably developed ridges; laterally and basally with fringe of scale-like setae. Elytra elongate, base indistinctly margined on some, apparently lacking in others; intervals convex and granulate-tuberculate. Metafemur elongate. Metatibia gradually widening to apex. Metatarsi elongate, not or weakly widened at apex.
Distribution. Nearly cosmopolitan (absent in South America).
Composition. Worldwide, Rhyssemus contains approximately 200 species, 8 of which occur in the New World.

Rhyssemus brownwoodi
Gordon and Cartwright 1980: 10, TX-USA.
Rhyssemus californicus Horn 1871: 290, SW-USA.
Rhyssemus germanus (Linnaeus 1767: 566) [Ptinus], NE-N.America (introduced), Europe.
                  = Rhyssemus funebris Roubal 1912: 155.
                  = Rhyssemus geminatus Reitter 1890: 390.
                  = Rhyssemus obsoletus Rey 1890: 171.
                  = Rhyssemus pertinax Balthasar 1961: 127.
                  = Rhyssemus puncticollis Brown 1929: 91.
Rhyssemus mexicanus Hinton 1934: 29, Mexico.
Rhyssemus neglectus Brown 1929: 92, central-USA.
Rhyssemus scaber Haldeman 1848: 107, NE-USA.
Rhyssemus sonatus LeConte 1881: 77, N+central USA, S-Central Canada.
Rhyssemus spangleri Gordon and Cartwright 1980: 12, S. Mexico.
Life History. Adults are infrequently collected at light. Specimens have been sifted from sand or found walking on the surface in sandy areas. Steiner (1980) discusses the habits of R. scaber.
Larvae. Unknown.

Gordon, R. D. , and O. L. Cartwright. 1980. The Western Hemisphere species of Rhyssemus and Trichiorhyssemus (Coleoptera: Scarabaeidae). Smithsonian Contributions to Zoology 317: 1-29.
Steiner, W. E., Jr. 1980. Notes on the habitats and distribution of Rhyssemus scaber (Coleoptera: Scarabaeidae). Coleopterists Bulletin 34: 377-378.        

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Author: Paul Skelley

Generated on: 09/MAY/08.....Last modified: 09/MAY/08
University of Nebraska State Museum - Division of Entomology