Species Trox affinis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Trogidae (Hide Beetles)
Genus Trox (Hide Beetles)
Species affinis (Trox affinis)
Other Common Names
Explanation of Names
Trox affinis Robinson, 1940
affini (L). 'allied, related' (1)
Male genitalia with apices of lateral lobes needle-like but broader at base (3)
Some northeastern states, also Iowa (Robinson, 1940), Kansas(?) (female), Louisiana(?) (female), east Texas (4)
, and California (Robinson, 1941). (3)
All the type material was collected in the nests of crows in four localities in New Jersey. Robinson (1941) reports 24 additional specimens from four crows' nests in May of 1941 in Chester County, Pennsylvania, and 52 specimens from a great horned owl's nest in Cupola, Pennsylvania, in June, 1951. He says (p. 231) that the owl was using a crow's former nest, and that the Trox
were feeding "on the hair of rabbits and feathers of pheasant and grouse, which remains were found in the nest." (3)
Robinson believes it to be endemic in crows' nests or nests used formerly by crows. (3)
Type Locality: Moorestown, Burlington County, New Jersey (3)
Trox aequalis | Trox affinis
Differs from aequalis only in larger size and in the male genitalia.
Differs from the other species of the scaber group in the same way as stated for aequalis.
(Although Robinson described affinis
as a subspecies of aequalis
, later when he found it occurring throughout the range of aequalis
, he changed its status to that of a species.) (3)
Robinson, M. 1940. Studies in the Scarabaeidae (Coleoptera). 2. Transactions of the American Entomological Society 66: 141-159.
Robinson, M. 1941. Notes on some rare Scarabaeidae with the description of one new species (Coleoptera). Ent. News, 52: 227-232.
Vaurie, P. 1955. A revision of the genus Trox in North America (Coleoptera, Scarabaeidae). Bulletin of the American Museum of Natural History. 106(1): 1-90.
|1.||Dictionary of Word Roots and Combining Forms|
Donald J. Borror. 1960. Mayfield Publishing Company.
|2.||American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea|
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
|4.||An annotated checklist of the Scarabaeoidea of Texas.|
Edward G. Riley & Charles S. Wolfe. 2003. Southwestern Entomologist, Supplement. 37 pp.