Maoriplatynus marrisi Larochelle and Larivière, 2021

Larochelle & Larivière, Marie-Claude, 2021, Synopsis of the tribe Platynini in New Zealand (Coleoptera: Carabidae), Insecta Mundi 2021 (864), pp. 1-96 : 18-19

Maoriplatynus marrisi Larochelle and Larivière , new species

Fig. 47 , 90 , 154

Maoriplatynus marrisi Larochelle and Larivière , new species. Holotype: male (NZAC) labeled “[ NEW ZEALAND TH] Three Kings Is Great I. Nov. 70 NZ. Ent. Div. Exp. (typed) / HOLOTYPE [male symbol] Maoriplatynus marrisi Larochelle & Larivière, 2021 (red label; typed).” Paratypes: one female (NZAC) and one male (LUNZ) from the same locality as the holotype, bearing blue paratype labels.

Description. Body length 12.5–12.7 mm. Head, pronotum, and elytra black; abdomen dark brown; antennae, palpi, and tarsi reddish; femora and tibiae rufopiceous. Microsculpture absent on head, very transverse (with

microlines) on pronotum and elytra. Iridescence present on pronotum and elytra. Very shiny. Head. Mandibles slightly curved anteriorly. Thorax. Pronotum slightly convex, impunctate, obsoletely wrinkled on disc and across base, narrow, strongly cordate, widest before middle; apex strongly emarginate; anterolateral angles well developed, angulate; anterior bead incomplete, obsolete medially; sides strongly rounded, strongly sinuate posteriorly; lateral beads incomplete, obsolete anteriorly; lateral depressions narrow; posterolateral angles rectangular, acute at apex; laterobasal foveae shallow, moderately wide, prolonged forward; posterior bead obsolete; base emarginate. Elytra. Slightly convex, not sloping down toward apex. Shoulders broadly rounded. Sides strongly rounded. Scutellar striole impunctate. Striae deep, impunctate. Intervals moderately convex; interval 3 with three moderately deep, small setiferous punctures. Subapical sinuations feeble. Aedeagus. Lateral view ( Fig. 90 ): slender, slightly arcuate; base slightly convex, almost straight dorsally; middle slightly convex dorsally, moderately concave ventrally, with dorsal membranous area moderately wide and very long; apex slender, moderately convex dorsally, slightly concave ventrally, with extreme tip moderately wide and long.

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

Geographic distribution ( Fig. 154 ). Offshore Islands: TH–Great Island, Tasman Valley.

Ecology. Coastal lowland. Epigean. Wet forests (broadleaf). Associated with streams. Shaded ground; wet soil. Nocturnal; active at night on mossy stream banks. Gregarious.

Biology. Seasonality: October–December. Tenerals: December. Predacious (based on mouthpart morphology). Regularly infested with mites.

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

Collecting technique. Hand-collecting.

Remarks. This species is named after our friend and colleague John M.W. Marris (Lincoln University, Lincoln, Christchurch) for his special help and encouragement in our entomological studies. In addition to generic characters, Maoriplatynus marrisi has the following distinguishing features: iridescence present on pronotum and elytra; pronotum narrow, strongly cordate; elytral interval 3 with three setiferous punctures.

Figures

Figures 45–48. Dorsal habitus. 45) Prosphodrus waimana new species. 46) P. occultus. 47) Maoriplatynus marrisi new species. 48) Kiwiplatynus bidens. Scale line = 1 mm.

Figures 87–93. Aedeagus, lateral. 87) Prosphodrus sirvidi new species.88) P.waimana new species.89) P. occultus. 90) Maoriplatynus marrisi new species. 91) Kiwiplatynus bidens. 92) K. taranaki new species. 93) Kupeplatynus sulcitarsis.

Figures 154–159. Species distribution maps. 154) Maoriplatynus marrisi new species. 155) Notagonum chathamense. 156) N. feredayi. 157) N. lawsoni. 158) N. submetallicum. 159) Platynus macropterus.