Prosphodrus waimana 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 : 16-17

Prosphodrus waimana Larochelle and Larivière , new species

Fig. 45 , 88 , 163

Prosphodrus waimana Larochelle and Larivière , new species. Holotype: male (NZAC) labeled “ NEW ZEALAND BP Urewera NP, Waimana Vly, Onepu Hut tk [=track] 1.XII.1995 Larivière, Larochelle (typed) / Shaded edges, swift rill; stony-rocky; broadleaf for. [=forest] Under ½ emerged stones (typed) / HOLOTYPE [male symbol] Prosphodrus waimana Larochelle & Larivière, 2021 (red label; typed).” Paratypes: one male (CMNZ) from the same locality as the holotype and one female (NZAC) from Urewera National Park , Waimana Valley, Te Waiiti Stream (BP), bearing blue paratype labels.

Description. Body length 16.1–18.0 mm. Head, pronotum, and elytra black; abdomen dark brown; antennae and palpi reddish brown; legs dark brown. Microsculpture moderately transverse on head, pronotum, and elytra. Very shiny, without metallic luster. Head. Mandibles slightly curved anteriorly. Labrum moderately transverse, slightly to moderately emarginate anteriorly. Antennae very long. Eyes small, strongly convex. Tempora moderately inflated and long (about half as long as eyes). Mentum with two setae. Submentum with four setae. Palpi with terminal segment truncate apically. Thorax. Pronotum moderately convex, impunctate, feebly wrinkled medially and laterally, wide, trapezoid, widest before middle; apex subtruncate; anterolateral angles moderately developed, rounded; anterior bead incomplete, obsolete medially; sides moderately rounded anteriorly, not sinuate posteriorly; lateral beads complete, widened basally; lateral depressions narrow anteriorly, widened posteriorly; posterolateral angles subrectangular; laterobasal foveae very deep and wide, rounded, not prolonged forward; posterior bead complete; base emarginate. Legs. Very long. Protibiae with dorsal longitudinal groove obsolete. Elytra. Moderately convex, sloping down toward apex, subovate, widest behind middle. Basal margin incomplete, reaching about stria 4. Shoulders angulate. Sides slightly rounded. Scutellar striole very long, impunctate. Striae deep (shallower at base), finely punctate. Intervals depressed; interval 3 with or without one or two obsolete setiferous punctures. Umbilicate series with 19–20 setiferous punctures. Subapical sinuations absent. Apices obtuse. Abdomen. Sternum VII (last visible sternum): male with two long apical ambulatory setae; female with four long apical ambulatory setae. Aedeagus. Lateral view ( Fig. 88 ): strongly arcuate in basal half; base slightly convex dorsally, with basal lobe moderately wide; middle subparallel, strongly convex in basal half, almost straight in apical half dorsally, moderately concave ventrally, without visible dorsal membranous area; apex subtriangular, strongly concave dorsally, slightly concave ventrally, with extreme tip narrow and moderately long. Dorsal view: moderately wide, symmetrical (ostium of membranous area dorsal).

Material examined. 147 specimens ( CMNZ, JNNZ, LUNZ, MONZ, NZAC).

Geographic distribution ( Fig. 163 ). North Island: BP, GB, TO.

Ecology. Lowland, montane. Fossorial, amphibious. Margins of rills (about 1–2 m wide) and seepages crossing dense wet forests (broadleaf, podocarp). Associated with gullies and ravines. Shaded ground; wet, stony or gravelly soil. Nocturnal; hides during the day under embedded stones. Gregarious.

Biology. Seasonality:September–April, July. Tenerals: November, January–February. Predacious (based on mouthpart morphology). Defense mechanism: when alarmed, the adult escapes by running and diving into the water.

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

Collecting techniques. Turning embedded stones; pitfall trapping.

Remarks. The species is named after the type locality Waimana Valley (BP), and is applied as a noun in apposition. Prosphodrus waimana is morphologically close to P. occultus . In addition to diagnostic characters of the male genitalia, P. waimana has the following distinguishing features: pronotum feebly wrinkled medially and laterally, posterior bead complete. Both species occur in eastern areas of the North Island although they are allopatric: P. waimana is present in BP, TO, and GB (East Cape area), while P. occultus is found in RI, HB, and GB (excluding the East Cape area).

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 160–164. Species distribution maps. 160) Prosphodrus mangamuka new species. 161) P. occultus. 162) P. sirvidi new species. 163) P. waimana new species. 164) P. waltoni.