Amarotypus simoninensis Larochelle and Larivière, 2022

Larochelle & Larivière, Marie-Claude, 2022, Synopsis of the tribe Amarotypini in New Zealand (Coleoptera: Carabidae), Insecta Mundi 2022 (942), pp. 1-30 : 6-7

Amarotypus simoninensis Larochelle and Larivière , new species

Fig. 22 , 44

Amarotypus simoninensis Larochelle and Larivière , new species. Holotype: male (NZAC) labeled “[ NEW ZEALAND] FD [=WD] Simonin Pass W. Olivine Ra [=Range] (hand-written) / 1067 m FD [=WD] 27 Jan 75 G.W. Ramsay (hand-written) / Litter (typed) in Nothofagus forest 75/38 (hand-written) / HOLOTYPE ♂ Amarotypus simoninensis Larochelle & Larivière, 2022 (red label; typed).”

Description. Body length 4.6 mm; ovate. Dorsal surface bicolored. Head, pronotum, elytra, and abdomen rufopiceous; sides of pronotum and elytra widely rufotestaceous; antennae rufotestaceous (segments 3–4 rufopiceous); palpi and femora rufotestaceous; tibiae and tarsi rufopiceous. Microsculpture strong and isodiametric (almost granulate) on head, obsolete and isodiametric on pronotum, obsolete and very transverse (with microlines) on elytra. Iridescence present on elytra. Shiny on head, pronotum, and elytra. Metallic luster absent. Head. Labrum moderately transverse. Eyes slightly convex. Thorax. Pronotum strongly convex, impunctate, obsoletely wrinkled across base, trapezoid, widest basally; apex moderately emarginate; anterolateral angles well developed, angulate; anterior bead complete; sides moderately rounded, not sinuate posteriorly; lateral beads narrow, slightly widened from apex to base; lateral depressions present, widened anteriorly and posteriorly; posterolateral angles acute, slightly projected laterally; laterobasal foveae with outer fovea oblong, narrow, shallow, and inner fovea oblong, moderately wide, moderately deep; posterior bead obsolete. Legs. Pro- and mesotarsomeres 1–4 of male moderately dilated. Elytra. Ovate. Fused along suture (hindwings vestigial). Strongly convex. Shoulders slightly obtuse. Sides strongly rounded. Striae shallow, finely punctate; stria 3 with a single well developed, coarse setiferous puncture. Scutellar striole moderately long (about a quarter of elytral length). Intervals slightly convex. Umbilicate series with 15 setiferous punctures. Apices obtusely rounded. Aedeagus. Not examined.

Material examined. 1 specimen ( NZAC).

Geographic distribution ( Fig. 44 ). South Island: WD –Westland National Park (Olivine Range, Simonin Pass).

Ecology. Subalpine. Wet forest (beech). Shaded ground. Nocturnal; hides during the day in leaf litter.

Biology. Seasonality: January. Predacious (based on mouthpart morphology).

Dispersal power. Subapterous (incapable of flight).

Collecting technique. Sifting leaf litter.

Remarks. This species is named after the type locality Simonin Pass (WD) and the Latin suffix – ensis, denoting a place, locality, or country. Due to the paucity of material, no male was dissected in this study. However, there is no ambiguity regarding the identity of this taxon. Amarotypus simoninensis has the following distinguishing features: dorsal surface bicolored (sides of head, pronotum, and elytra widely testaceous, strongly contrasting with rufopiceous background); antennae rufotestaceous, with segments 3–4 rufopiceous; pronotum strongly convex, sides not sinuate posteriorly; elytral stria 3 with a single well developed, coarse setiferous puncture. This species is known only from the type locality in the southwest of the South Island.

Figures

Figures 21–24. Dorsal habitus. 21) Amarotypus edwardsii. 22) Amarotypus simoninensis new species (holotype). 23) Amarotypus takaheensis new species (paratype). 24) Amarotypus glasgowensis new species (holotype). Scale line = 1 mm.

Figures 42–47. Species distribution maps. 42) Amarotypus glasgowensis new species. 43) Amarotypus murchisonorum new species. 44) Amarotypus simoninensis new species. 45) Amarotypus takaheensis new species. 46) Amaroxenus arnaudensis new species. 47) Amaroxenus glacialis new species.