Barney, Robert J., 2018, Definition and Revision of the Atomarius Species-Group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), Including Descriptions of Nine New Species

Barney, Robert J., 2018, Definition and Revision of the Atomarius Species-Group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), Including Descriptions of Nine New Species, The Coleopterists Bulletin 72 (1), pp. 9-74

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http://dx.doi.org/10.1649/0010-065x-72.1.9

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Pachybrachis atomarius     11-12
Pachybrachis varians     12
Pachybrachis jacobi key  new species  12
Pachybrachis parvus     12
Pachybrachis calcaratus key    12
Pachybrachis quadrioculatus     12
Pachybrachis lodingi     12
Pachybrachys stygicus key    12
Pachybrachis atomarius key    12
Pachybrachis matthewi key  new species  13
Pachybrachis dixianus     13
Pachybrachis relictus     13
Pachybrachis luctuosus key    14
Pachybrachis caroleae key  new species  14
Pachybrachis mcmeansi   new species  14
Pachybrachis charlotteae   new species  15
Pachybrachis walteri   new species  15
Pachybrachis confederatus     15
Pachybrachis cephalicus     16
Pachybrachis erinae   new species  16
Pachybrachis gibsoni   new species  16
Pachybrachis gibbyi   new species  16
Pachybrachis lodingi     17-20
Pachybrachis quadrioculatus     20
Pachybrachis calcaratus     20-21
Pachybrachis atomarius     21-22
Pachybrachis stygicus     22-23
Pachybrachis jacobi   new species  23-24
Pachybrachis luctuosus     24-25
Pachybrachis varians     25-27
Pachybrachis matthewi   new species  27-29
Pachybrachis relictus     29
Pachybrachis parvus     29-32
Pachybrachis dixianus     32
Pachybrachis caroleae   new species  32-35
Pachybrachis mcmeansi   new species  35
Pachybrachis charlotteae   new species  35-38
Pachybrachis walteri   new species  38
Pachybrachis confederatus     39-40
Pachybrachis cephalicus     40-43
Pachybrachis erinae   new species  43
Pachybrachis gibsoni   new species  43-46
Pachybrachis gibbyi   new species  47-50
Pachybrachis lodingi     52-54
Pachybrachis calcaratus     54-55
Pachybrachis quadrioculatus     54
Pachybrachis atomarius     55-59
Pachybrachis stygicus     59-65
Pachybrachis jacobi     65-66
Pachybrachis luctuosus     66-67
Pachybrachis varians     67
Pachybrachis matthewi     67-68
Pachybrachis relictus     68-69
Pachybrachis parvus     69-70
Pachybrachis dixianus     70
Pachybrachis caroleae     70
Pachybrachis mcmeansi     70-71
Pachybrachis charlotteae     71
Pachybrachis walteri     71-72
Pachybrachis confederatus     72
Pachybrachis erinae     72-73
Pachybrachis cephalicus     72
Pachybrachis gibsoni     73-74
Pachybrachis gibbyi     74