Brittonoma pygidiatum ( Kirejtshuk, 2011 ) Kirejtshuk & Kovalev, 2022

Kirejtshuk, Alexander G. & Kovalev, Alexey V., 2022, Monograph on the Cillaeinae (Coleoptera: Nitidulidae) from the Australian Region with comments on the taxonomy of the subfamily, Zootaxa 5103 (1), pp. 1-133 : 78

30. Brittonoma pygidiatum ( Kirejtshuk, 2011) , comb. nov.

Figs 24 , A–G

Brittonema pygidiatum Kirejtshuk, 2011: 58 ; Australia, Queensland.

Specimens examined. Type series examined by Kirejtshuk (2011). This species also is mentioned and pictured by Lawrence & Ślipiński (2013).

Diagnosis. This species differs from another described congener in the smaller and more slender body (6.2–7.8 mm), head with emarginate anterior edge, temples acutely projecting behind eyes, V-shaped depression between the antennal insertions, less projecting and subquadrangular male labrum, lack of clear sexual dimorphism in the structure of mandibles, much longer abdominal segments uncovered by elytra, widely rounded apex of the male pygidium, rounded apex of the male anal sclerite, narrower mentum, narrower tarsi, not dentate tarsal claws, comparatively coarser punctation on the dorsum and simple rows of punctures in striae between longitudinal elevated interstrial spaces on elytra, and also in the structure of the male genitalia.

Figures

FIGURE 24. Brittonoma pygidiatum, comb. nov., orig. Holotype, male from QLD (ANIC: “Mt. Lewis Rd., N. Q, 3000’, 30 Oct. 1966, E. Britton”); A: body, dorsal: B: head, dorsal; C: head and thorax, ventral; D: male anal sclerite and spiculum gastrale, ventral; E: tegmen, ventral; F: penis trunk, dorsal; G: proximal part of inner sac with armature. Scale bars: a = 2.0 mm to Fig. A; b = 1.0 mm to Figs B–D; с = 0.25 mm to Figs E–I.