Bembidion (Zemetallina) mangamuka, Larochelle & Zeperyphodes & Broun & Larivière, 2015

Larochelle, André, Zeperyphodes, Broun & Larivière, Marie-Claude, 2015, Synopsis of the genus Bembidion Latreille in New Zealand (Coleoptera: Carabidae: Bembidiini), Insecta Mundi 2015 (415), pp. 1-78 : 41-42

Bembidion (Zemetallina) mangamuka new species

Fig. 31 , 64 , 87

Bembidion mangamuka Larochelle and Larivière , new species. Holotype: male (NZAC) labeled: “ NEW ZEALAND ND Mangamuka (6 km NE; Opurehu R) 28.XII.1992 A. Larochelle (typed)/ Sandy sterile riverbank (typed) / HOLOTYPE [male symbol] Bembidion mangamuka Larochelle & Larivière, 2015 (red label; typed).” Paratypes: three males (CMNZ, LUNZ, NZAC) and one female (NZAC) from the same locality as the holotype, bearing blue paratype labels.

Description. Body length 4.0– 4.7 mm. Forebody black; elytra dark brown with epipleura pale rufous; antennae yellow to light brown; femora brown, tibiae and tarsi yellowish. Microsculpture moderately transverse, feeble on disc of head and pronotum, moderately strong on elytra. Shiny, with strong metallic lustre (aeneous, sometimes slightly greenish or bluish); femora and tibiae with slight metallic lustre. Forebody moderately wide in comparison to elytra. Head. Antennae filiform, moderately long (reaching about elytral shoulders). Thorax. Pronotum moderately convex, moderately wide; sides moderately rounded anteriorly, moderately sinuate posteriorly; posterolateral angles acute, strongly projected laterally, acute at extreme tip; laterobasal foveae moderately deep, linear, moderately long, not reaching basal margin. Epipleura (in dorsal view) exposed in front of posterolateral angles. Elytra. Moderately convex, subovate, moderately wide, widest about middle. Shoulders obtuse. Sides moderately rounded. Scutellar striole consisting of a row of punctures. Striae 3–7 incomplete, shallow, erased apically, moderately coarsely punctate; stria 7 strong, incomplete, coarsely punctate. Intervals depressed. Apical striole deep, connected to stria 7; preapical setiferous puncture not isolated. Abdomen. Last visible sternum (sternum VII) of female with four long ambulatory setae only. Aedeagus. Lateral view ( Fig. 64 ): moderately arcuate; base strongly convex dorsally; middle slightly convex dorsally towards its base, rather straight dorsally towards its apex, slightly convex ventrally; apex triangular, straight dorsally and ventrally, with extreme tip narrow and short.

Material examined. 77 specimens ( CMNZ, LUNZ, NZAC).

Geographic distribution ( Fig. 87 ). North Island: ND–Herekino. Opurehu River (6 km North East of Mangamuka). Mangamuka River. Puketi Forest, Forest Road [end], Waipapa River. Pakotai.

Ecology. Lowland. Fossorial. River banks, at a certain distance from water. Open ground; wet, sandy, bare soil. Nocturnal; hides during the day in the sand. Gregarious.

Biology. Seasonality: September–October, December–January. Tenerals: December. Often infested with fungi (Laboulbeniales). Defence mechanism: when alarmed, the adult escapes by running.

Dispersal power. Macropterous, probably capable of flight. Fast runner. Vagility likely favoured by flight capacity.

Collecting techniques. Pouring water over the ground; treading the soil with the feet.

Remarks. The name of this species is based on its type locality, Mangamuka (6 km NE; Opurehu River). Bembidion mangamuka is morphologically close to B. solitarium and B. bullerense . In addition to diagnostic characters of the male genitalia, B. mangamuka has the following distinguishing features: head and pronotum black; elytra dark brown; pronotum with extreme tip of posterolateral angles acute and epipleura (in dorsal view) exposed in front of posterolateral angles; elytra with shoulders obtuse and striae shallow. Bembidion mangamuka is restricted to the northern North Island (ND). The pale-legged specimens recorded from Herekino and Pakatai [=Pakotai] (ND) and identified as B. anchonoderus by Lindroth (1976: 187), refer to B. mangamuka .

Figures

Figures 29–32. Dorsal habitus. 29) Bembidion waiho new species. 30) B. urewerense. 31) B. mangamuka new species. 32) B. solitarium. Scale line = 1 mm.

Figures 61–69. Aedeagi, lateral. 61) Bembidion parviceps. 62) B. waiho new species. 63) B. urewerense. 64) B. mangamuka new species. 65) B. solitarium. 66) B. bullerense new species. 67) B. hokitikense. 68) B. chalceipes. 69) B. wanakense.

Figures 83–88. Species distribution maps. 83) Bembidion giachinoi. 84) B. granuliferum. 85) B. hokitikense. 86) B. karikari new species. 87) B. mangamuka new species. 88) B. maorinum levatum.