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Genus Clinidium

unk beetle - Clinidium Clinidium baldufi Bell - Clinidium baldufi Clinidium calcaratum? - Clinidium calcaratum - male Clinidium apertum allegheniense - Clinidium apertum Clinidium apertum allegheniense - Clinidium apertum Pennsylvania Beetle for ID - Clinidium WBB under bark - Clinidium Wrinkled Bark Beetles – Rhysodidae – Clinidium - Clinidium
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Rhysodidae (Wrinkled Bark Beetles)
Genus Clinidium
Synonyms and other taxonomic changes
revised in (1)
Explanation of Names
Clinidium Kirby 1835
Numbers
6 spp. in our area (all in sibg. Arctoclinidium Bell 1970), ~75 spp. in 4 subgenera total(2)
Identification
Key to species modified from (3)
1. Calcars (anteriorly directed processes on apex of meso-/metatibae) present ................... Males, 2
Calcars absent .................. Females, 7
2. Metasternum not sulcate ................... 3
Metasternum with median sulcus ............ 4
3. Hind femur with large ventral tooth; hind calcar small, less than 0.25 length of tibia; temporal setae present .......... valentinei Bell
Hind femur without tooth; hind calcar very large, more than 0.5 length of tibia; temporal setae absent.................... calcaratum Leconte
4. Prosternum with median pilose area ........ 5
Prosternum glabrous in midline ............ 6
5. Transverse sulci of sternite V broadly separated by glabrous space; hind calcar small ......................................... rosenbergi Bell
Transverse sucli of sternite V closely approximate, the space between them occupied by a pilose area ...................... sculptile (Newman)
6. Sternites IV and V each with very fine median carina; that of sternite V completely dividing median pilose area,
that of sternite IV dividing pilose area only in posterior half; hind calcars moderately large ............................... baldufi Bell
Sternites IV and V without median carina ................................................................................................ apterum Reitter *
7. Metasternum not sulcate ....................... 8
Metasternum with median sulcus ................ 9
8. Transverse sulci of sternite III deeply excavated laterally, those of sternite IV not at all excavated ......... valentinei Bell
Transverse sulci of sternite III not at all excavated, those of sternite IV deeply excavated laterally ......... calcaratum Leconte
9. Transverse sulci of sternites III and IV both excavated laterally ........................................... 10
Transverse sucli of sternite III deeply excavated laterally, those of sternite IV not excavated ....... 11
10. Sternite VI not impressed; excavations of sternites III and IV equal ...................................... rosenbergi Bell
Sternite VI distinctly impressed; excavations of sternite IV smaller than those of sternite III ....... sculptile (Newman)
11. Sternite VI very deeply impressed; cauda angulate, projecting ................ baldufi Bell
Sternite VI not impressed or only slightly so; cauda small, rounded .......... apterum Reitter *
Range
primarily neotropical, with a handful of spp. in the Holarctic; in our area, C. calcaratum is western (BC-CA), the remaining 5 spp., in e US(2)