Oopterus corvinki, Larochelle & Larivière & Larochelle & Larivière, 2017

Larochelle, Larivière, Marie-Claude, Larochelle & Larivière, 2017, Synopsis of the tribe Zolini in New Zealand (Coleoptera: Carabidae), Insecta Mundi 2017 (594), pp. 1-110 : 33-34

Oopterus corvinki new species

Fig. 36 , 82 , 124

Holotype: male ( NZAC) labeled: “ NEW ZEALAND FD (typed) Breaksea So Gilbert Is No 6 May 1982 (hand-written) / C.F. Butcher ex litter r2 (hand-written) / [male symbol] / HOLOTYPE [male symbol] Oopterus corvinki Larochelle & Larivière, 2017 (red label; typed).” Paratypes: two males (LUNZ, NZAC) from the same locality as the holotype, bearing blue paratype labels.

Description. Body length 4.3–4.6 mm. Head reddish, darker medially; pronotum and elytra dark red; abdomen mostly yellow, black anterobasally; lateral margins and a large apical space on each elytron pale yellow; antennae, palpi, and legs reddish; antennal segment 1 (scape) and femora pale yellow. Microsculpture obsolete and isodiametric on head, strong and very transverse (with microlines) on pronotum and elytra. Iridescence absent on head, very strong on pronotum and elytra. Very shiny, with metallic luster (aeneous) on pronotum and elytra. Head. Labrum strongly transverse, slightly emarginate anteriorly. Antennae submoniliform, moderately long: segment 1 (scape) moderately long, about 2x longer than its maximum width. Frontal furrows wide, shallow, convergent. Eyes slightly convex; two setiferous punctures on inner side of each eye. Tempora not inflated. Mentum: medial tooth entire, acute apically, moderately shorter than lateral lobes. Paraglossae membranous, prominent, about as long as ligula. Thorax. Pronotum moderately convex, impunctate, wrinkled discally, strongly transverse, moderately cordate, widest before middle; apex truncate; anterolateral angles poorly developed, rounded; anterior bead incomplete, obsolete medially; sides strongly rounded, moderately sinuate posteriorly; lateral grooves absent; a single setiferous puncture on each side (anteriorly); posterolateral angles obtuse; posterolateral carinae blunt, very long (about as long as adjoining foveae); laterobasal foveae well defined, impunctate, shallow, very wide, subrectangular, prolonged forward, double; posterior bead absent; base emarginate, about as wide as pronotal apex and elytral base. Legs. Moderately long. Elytra. Strongly convex, ovate, widest about middle. Basal margin incomplete, reaching about stria 4. Shoulders obtuse. Sides strongly rounded. Scutellar striole present. Stria 1 complete; striae 4–7 incomplete; striae 1–4 moderately deep; striae 5–7 shallow; striae 1–7 finely punctate; stria 3 with three setiferous punctures. Recurrent stria long, sharp, directed apically toward striae 5 or 6. Subapical seta present. Intervals slightly convex. Sutural apices obtuse. Abdomen. Last visible sternum (sternum VII): male with two apical ambulatory setae; female with four apical ambulatory setae. Aedeagus. Lateral view ( Fig. 82 ): strongly arcuate, narrowed in apical half; base slightly convex dorsally; middle angulate basally and somewhat straight dorsally, moderately convex ventrally, with dorsal membranous area moderately wide and very long; apex subtriangular, straight dorsally, slightly concave ventrally, with extreme tip moderately wide and long. Dorsal view: narrow, asymmetrical (ostium of membranous area deflected to right); apex straight; basal orifice narrow, closed anteriorly, moderately distant from membranous area. Parameres with five apical setae.

Material examined. 3 specimens ( LUNZ, NZAC).

Geographic distribution ( Fig. 124 ). South Island: FD –Breaksea Sound, Gilbert Islands.

Ecology. Lowland. Wet forest (beech). Found in leaf litter.

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

Dispersal power. Subapterous (incapable of flight). Moderate runner.

Collecting technique. Sifting leaf litter.

Remarks. This species is named after our friend and colleague Cor J. Vink (Canterbury Museum, Christchurch) for his special help and encouragement in our entomological studies. Oopterus corvinki is morphologically close to O. arthurensis . In addition to diagnostic characters of the male genitalia, O. corvinki has the following distinguishing features: body length 4.3–4.6 mm; antennae submoniliform, moderately long; tempora not inflated; pronotum strongly transverse, moderately cordate, posterolateral angles obtuse; elytral striae mostly visible. The two species are allopatric: O. corvinki is restricted to the southwestern South Island (FD, Gilbert Islands), while O. arthurensis occurs in the northwest of the South Island (NN, Mount Arthur).

Figures

Figures 35–38. Dorsal habitus. 35) Oopterus arthurensis new species. 36) O. corvinki new species. 37) O. palmai new species. 38) O. monticola new species. Scale line = 1 mm.

Figures 82–89. Aedeagi, lateral. 82) Oopterus corvinki new species. 83) O. palmai new species. 84) O. monticola new species. 85) O. strenuus. 86) O. clivinoides. 87) O. mohiensis new species. 88) O. frontalis. 89) O. punctatus new species.

Figures 124–129. Species distribution maps. 124) Oopterus corvinki new species. 125) O. discoideus new species. 126) O. frontalis. 127) O. fulvipes. 128) O. garnerae new species. 129) O. laevicollis.