Bembidion (Zemetallina) bullerense, 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 : 43-44

Bembidion (Zemetallina) bullerense new species

Fig. 33 , 66 , 76

Bembidion bullerense Larochelle and Larivière , new species. Holotype: male (NZAC) labeled: “ NEW ZEALAND BR Buller River , E. [= East of] Newton Creek [= River] Jct 150 m 4146E 17210E 6.III.2007 Larivière, Larochelle (typed)/ Open, moist, bare, clayed riverbank. Under deeply embedded stones, 2–3 m from water. (typed) / HOLOTYPE [male symbol] Bembidion bullerense Larochelle & Larivière, 2015 (red label; typed).” Paratypes: two males (AMNZ, LUNZ) and one female (NZAC) from the same locality as the holotype, bearing blue paratype labels.

Description. Body length 4.6–5.5 mm. Black; antennae (segments 1–2 testaceous) and legs rufotestaceous (femora darker). Microsculpture moderately transverse, feeble on disc of head and pronotum, and moderately strong on elytra. Shiny, with strong metallic lustre (greenish on head, aeneous on pronotum and elytra). Forebody moderately wide in comparison to elytra. Head. Antennae filiform, moderately long (reaching about elytral shoulders). Thorax. Pronotum strongly convex, moderately wide; sides strongly rounded anteriorly, moderately sinuate posteriorly; posterolateral angles subacute, projected laterally, vaguely obtuse at tip; laterobasal foveae moderately deep, linear, moderately long, reaching or almost reaching basal margin. Epipleura (in dorsal view) not exposed in front of posterolateral angles. Elytra. Strongly convex, elongate, narrow, widest about middle. Shoulders slightly rounded. Sides slightly rounded. Scutellar striole consisting of a row of punctures. Striae 2–3 complete, 4–6 incomplete; striae moderately deep, coarsely punctate; stria 7 strong, incomplete, coarsely punctate. Intervals depressed. Apical striole moderately deep, connected to stria 7; preapical setiferous puncture not isolated. Abdomen. Last visible sternum (sternum VII) of female with numerous short setae in addition to four long ambulatory setae. Aedeagus. Lateral view ( Fig. 66 ): strongly arcuate; base slightly concave dorsally; middle moderately convex dorsally, moderately concave ventrally; apex stout, subtriangular, straight dorsally, slightly concave ventrally, with extreme tip wide and moderately long.

Material examined. 27 specimens ( AMNZ, LUNZ, NZAC).

Geographic distribution ( Fig. 76 ). South Island: BR –Awatuna, Waimea Creek. Buller River (East of Newton Creek [=River] Junction; Highway 6, 8 km West of Murchison; New Creek mouth). Maruia Falls. Maruia River, Creighton Road end. Upper Matakitaki River, Murty Flat.

Ecology. Lowland, montane. Epigean. River banks, at a certain distance (2–3 m) from water. Open ground; moist or wet, sandy bare soil sometimes mixed with silt or clay. Nocturnal; hides during the day under well embedded stones. Gregarious.

Biology. Seasonality: March. 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. Turning stones; pouring water over the ground.

Remarks. The name of this species is based on its type locality, Buller River and the Latin suffix – ensis, denoting a place or locality. Bembidion bullerense is morphologically close to B. solitarium . In addition to diagnostic characters of the male genitalia, B. bullerense has the following distinguishing features: metallic lustre greenish on head, aeneous on pronotum and elytra; pronotum with posterolateral angles acute, projected laterally; elytra strongly convex, elongate, narrow, with shoulders and sides slightly rounded; last visible abdominal sternum (sternum VII) of female with numerous short setae, in addition to four long ambulatory setae. Both species are allopatric: B. bullerense is restricted to the northwestern South Island (BR) while B. solitarium occurs in southern areas of the North Island.

Figures

Figures 33–36. Dorsal habitus. 33) Bembidion bullerense new species. 34) B. hokitikense. 35) B. chalceipes. 36) B. wanakense. 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 71–76. Species distribution maps. 71) Bembidion actuarium. 72) B. alacre. 73) B. albescens. 74) B. anchonoderus. 75) B. brullei. 76) B. bullerense new species.