Tylonotus Tylonotus Cerambycidae Tylonotus Hemiptera Nototylus After 157 years, a second specimen and species of the phylogenetically enigmatic and previously monobasic genus Nototylus Gemminger & Harold, 1868 (Coleoptera, Carabidae, Nototylini) Erwin, Terry L. Kavanaugh, David H. Maddison, David R. ZooKeys 2020 927 65 74 8KXZB 0F63823E-1274-5B8B-9133-FFCA420395CD Gemminger & Harold, 1868 Gemminger & Harold 1868 Insecta Carabidae Nototylus CoL Animalia Nototylus Coleoptera 0 65 Arthropoda genus   TylonotusSchaum, 1863: 74 (preoccupied by TylonotusHaldeman, 1847, a genus in the beetle family Cerambycidae, and TylonotusFieber, 1858 ( Hemiptera).  NototylusGemminger & Harold, 1868: 161, new name.  Diagnostic combination. Head domed, sub-hypognathus, with a partial sulcus (Fig. 5) under the anterior part of eye. Profemur with a subapicoventral concavity (Fig. 6) containing slender, elongate and apically ovospatulate setae (Fig. 8). This structure, unique within Carabidae, is presumed to be used for grooming the antenna (we will refer to it as a "grooming structure" below). Protibial antennal cleaner absent. Tibiae flattened as in carabids known to live with ants and lined with sparse apically spatulate setae. Deuve (1994)provided the following additional characteristics: procoxal cavities ( sensu LeConte 1853) closed with pleural lobe fitted into the prosternal process; the harpalidian-type post abdomen ( sensu Deuve 1988). Tergite IX differentiated as a thin transverse arch, laterotergites IX reduced and very lateral in location. The combination of character states in this enigmatic genus is unique within Carabidae.  Included species currently recognized.   Nototylus fryi(Schaum), 1863   Nototylus balliErwin & Kavanaugh, new species  Key to adult females of  NototylusGemminger & Harold, 1868    1 Elytron (Fig. 1) only slightly swollen posterior to humerus; pronotum (Fig. 1) elongate, more strongly narrowed posteriorly, with lateral margins slightly sinuate, not rounded; brachypterous, hindwing without venation distal to stigma    Nototylus fryi(Schaum)  - Elytron (Fig. 2) more distinctly swollen posterior to humerus; pronotum (Fig. 2) subquadrate, with sides slightly rounded; macropterous    Nototylus balliErwin & Kavanaugh, sp. nov.  -   Figures 1-8.  Nototylus 1  Nototylus fryi(Schaum), habitus, dorsal aspect, apparent body length (ABL) = 8.2 mm 2-6  Nototylus ballisp. nov.: 2habitus, dorsal aspect, ABL = 9.1 mm 3habitus, left lateral aspect 4head, dorsal aspect 5head, left lateral aspect; arrow indicates location of sulcus beneath eye 6left foreleg, lateral aspect; femur with antennal cleaner present subapicoventrally 7left mesotibia, ventral aspect 8closeup of a middle leg spatulate seta. Scale bars: 0.5 mm ( 1-8).