Nototylus Gemminger & Harold, 1868

Erwin, Terry L., Kavanaugh, David H. & Maddison, David R., 2020, After 157 years, a second specimen and species of the phylogenetically enigmatic and previously monobasic genus Nototylus Gemminger & Harold, 1868 (Coleoptera, Carabidae, Nototylini), ZooKeys 927, pp. 65-74 : 65

Genus Nototylus Gemminger & Harold, 1868

Tylonotus Schaum, 1863: 74 (preoccupied by Tylonotus Haldeman, 1847, a genus in the beetle family Cerambycidae , and Tylonotus Fieber, 1858 ( Hemiptera ).

Nototylus Gemminger & 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 balli Erwin & Kavanaugh, new species

Key to adult females of Nototylus Gemminger & Harold, 1868

Figures

Figures 1 - 8. Nototylus 1 Nototylus fryi (Schaum), habitus, dorsal aspect, apparent body length (ABL) = 8.2 mm 2 - 6 Nototylus balli sp. nov.: 2 habitus, dorsal aspect, ABL = 9.1 mm 3 habitus, left lateral aspect 4 head, dorsal aspect 5 head, left lateral aspect; arrow indicates location of sulcus beneath eye 6 left foreleg, lateral aspect; femur with antennal cleaner present subapicoventrally 7 left mesotibia, ventral aspect 8 closeup of a middle leg spatulate seta. Scale bars: 0.5 mm (1 - 8).