Amarotypus fiordlandensis 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 : 8-9

Amarotypus fiordlandensis Larochelle and Larivière , new species

Fig. 13 , 25 , 41

Amarotypus fiordlandensis Larochelle and Larivière , new species. Holotype: male (NZAC) labeled “ NEW ZEALAND FD Bauza I [= Island ] Mar 1984 C.F. Butcher (typed) beaten Nothofagus menziesii (hand-written) / HOLOTYPE ♂ Amarotypus fiordlandensis Larochelle & Larivière, 2022 (red label; typed).” Paratypes: two males and two females (NZAC) from the same locality as the holotype, bearing blue paratype labels.

Description. Body length 5.3–6.6 mm; subovate. Head, pronotum, elytra, and abdomen rufopiceous; antennal segment 1 rufotestaceous, segments 2–11 rufopiceous; palpi rufotestaceous; legs rufopiceous. Microsculpture strong, isodiametric (almost granulate) on head, isodiametric on pronotum, and moderately transverse (bricklike) on elytra. Iridescence present on elytra. Shiny on head, pronotum, and elytra. Metallic luster present (aeneous). Head. Labrum moderately transverse. Eyes moderately convex. Thorax. Pronotum strongly convex, finely punctate basally, strongly wrinkled on disc and across base, subrectangular, widest about middle; apex moderately emarginate; anterolateral angles poorly developed, rectangular; anterior bead complete; sides strongly rounded, not sinuate posteriorly; lateral beads narrow throughout; lateral depressions absent anteriorly, wide posteriorly; posterolateral angles rectangular; laterobasal foveae with outer fovea oblong, narrow, and shallow, and inner fovea oblong, moderately wide, moderately deep; posterior bead incomplete, obsolete medially. Legs. Pro- and mesotarsomeres 1–4 of both sexes moderately dilated. Elytra. Ovate. Fused along suture (hindwings vestigial). Strongly convex. Shoulders strongly obtuse. Sides slightly rounded. Striae replaced by shallow rows of fine punctures; row 3 with three poorly developed, fine setiferous punctures. Scutellar striole very long (about two-thirds of elytral length). Intervals slightly convex (surface uneven). Umbilicate series with 13 to 15 setiferous punctures. Apices obtusely rounded. Aedeagus. Lateral view ( Fig. 13 ): slightly arcuate, slender, strongly widened apically; base moderately convex dorsally; middle slightly convex dorsally, slightly concave ventrally, with dorsal membranous area wide and short in apical half; apex ax-shaped, strongly convex dorsally, strongly concave ventrally, with extreme tip very wide, rounded, hooked ventrally. Dorsal view: asymmetrical (ostium of membranous area deflected to the left).

Material examined. 30 specimens ( LUNZ, MONZ, NZAC).

Geographic distribution ( Fig. 41 ). South Island: FD –Fiordland National Park (Bauza Island; Breaksea Sound; Doubtful Sound; Secretary Island; Wilmot Pass). WD –Westland National Park (Castle Rocks Valley; Olivine Range, Simonin Pass).

Ecology. Lowland, montane, subalpine. Arboreal, silvicolous. Wet forests (beech) and scrublands. Shaded ground. Nocturnal; active at night on mossy tree trunks; hides during the day on trees (beech) and shrubs ( Coprosma, Dracophyllum, Schefflera ).

Biology. Seasonality: November, January–March. Tenerals: January. Predacious (based on mouthpart morphology).

Dispersal power. Subapterous (incapable of flight). Moderate runner. Regular climber (on trees and shrubs).

Collecting techniques. Beating trees and shrubs; examining mossy tree trunks at night.

Remarks. This species is named after Fiordland (FD), the geographic area where the type locality Bauza Island is situated and the Latin suffix – ensis, denoting a place, locality, or country. Amarotypus fiordlandensis is morphologically close to A. murchisonorum . In addition to morphological characters of the male genitalia, A. fiordlandensis has the following distinguishing features: body smaller, length 5.3–6.6 mm; metallic luster present (aeneous); antennal segment 1 rufotestaceous, segments 2–11 rufopiceous; pronotum strongly convex, sides not sinuate posteriorly, posterolateral angles rectangular; elytra ovate, striae replaced by rows of punctures, row 3 with three setiferous punctures. Amarotypus fiordlandensis is found in southwestern areas of the South Island (FD, WD).

Figures

Figures 1–14. Amarotypini morphology. 1–4) Microsculpture. 1) Granulate. 2) Isodiametric. 3) Moderately transverse. 4) Very transverse. 5–7) Head. 5) Setiferous punctures medial, close to eye, frontal furrows (ff) subparallel posteriorly. 6) Punctures medial, distant from eye, furrows subparallel posteriorly. 7) Punctures postmedial, distant from eye, furrows convergent posteriorly. 8–10) Gonocoxites 1 (gc 1) and 2 (gc 2). 8) Amarotypus. 9) Amaroxenus. 10) Amarophilus. 11–14) Aedeagus, lateral. 11) Amarotypus edwardsii. 12) Amarotypus takaheensis new species. 13) Amarotypus fiordlandensis new species. 14) Amarotypus murchisonorum new species.

Figures 25–28. Dorsal habitus. 25) Amarotypus fiordlandensis new species. 26) Amarotypus murchisonorum new species. 27) Amaroxenus glacialis new species. 28) Amaroxenus arnaudensis new species (holotype). Scale line = 1 mm.

Figures 36–41. Species distribution maps. 36) Amarophilus lomondensis new species. 37) Amarophilus otagoensis new species. 38) Amarophilus rotundicollis new species. 39) Amarophilus wanakensis new species. 40) Amarotypus edwardsii. 41) Amarotypus fiordlandensis new species.