Bembidion (Ananotaphus) rotundicolle Bates, 1874

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 : 21-22

Bembidion (Ananotaphus) rotundicolle Bates, 1874

Fig. 11 , 46 , 95

Bembidium rotundicolle Bates, 1874: 275 . Type locality: Lake Coleridge, MC ( Bates, 1874: 275); Canterbury ( Lindroth 1976: 195, lectotype designated).

Bembidium eustictum Bates, 1878a: 195 . Type locality: Tairua, CL. New synonym

Bembidium clevedonense Broun, 1893: 1007 . Type locality: Near Clevedon, Southern Wairoa [River], AK ( Broun, 1893: 1008); “Hunua” [= Hunua Ranges], Clevedon, AK ( Lindroth, 1976: 196, lectotype designated). Synonymized by Lindroth 1976: 196.

Bembidium waikatoense Broun, 1910: 9 . Type locality: Mt Pirongia, WO. Synonymized by Lindroth 1976: 196.

Bembidion (Peryphus) clevedonense: Csiki 1928: 90 .

Bembidion (Peryphus) eustictum: Csiki 1928: 95 .

Bembidion waikatoense: Csiki 1928: 163 .

Bembidion (Peryphus) rotundicolle: Csiki 1928: 110 .

Bembidion (Zeactedium) clevedonense: Netolitzky 1931: 182 .

Bembidion (Zeactedium) eustictum: Netolitzky 1931: 182 .

Bembidion (Zeactedium) rotundicolle: Netolitzky 1931: 182 .

Bembidion (Ananotaphus) rotundicolle rotundicolle: Lindroth 1976: 195 .

Bembidion (Ananotaphus) rotundicolle eustictum: Lindroth 1976: 196 .

Description. Body length 3.5–4.6 mm. Forebody black or piceous; elytra dark brown tinged with reddish, with or without a pale subhumeral marking, always with a pale subapical marking; antennae and legs dark brown tinged with reddish (tibiae paler rufous). Microsculpture feeble to moderate, isodiametric. Shiny, with metallic lustre (aeneous, bronze, greenish). Thorax. Pronotum: sides strongly rounded anteriorly, oblique and slightly sinuate posteriorly; posterolateral angles strongly obtuse, somewhat rounded at tip; laterobasal foveae shallow to moderately deep, linear, short to moderately long, not reaching basal margin. Elytra. Ovate or subovate. Sides subparallel or slightly rounded. Striae 2–6 incomplete, moderately deep, finely or moderately coarsely punctate; stria 7 strong, incomplete, finely or moderately coarsely punctate. Discal setiferous punctures strong, foveate, situated near stria 3. Aedeagus. Lateral view ( Fig. 46 ): strongly arcuate, widened in apical half; base slightly concave dorsally; middle strongly convex dorsally with dorsal membranous area moderately wide and long and deflected to the left, slightly convex ventrally; apex subtriangular, rather straight dorsally and ventrally, with extreme tip triangular, wide and short.

Material examined. 301 specimens ( JNNZ, LUNZ, MONZ, NZAC).

Geographic distribution ( Fig. 95 ). North Island: AK, BP, CL, GB, HB, ND, RI, TO, WA, WI, WN, WO. South Island: BR, CO, DN, KA, MC, MK, NC, NN, OL, SC, SD, SL, WD. Offshore Islands: CH.

Ecology. Lowland, montane, subalpine. Epigean. Eurytopic. Mostly banks of streams, shores of lakes, ponds, sea beaches, lagoons and salt marshes. Also subalpine swards, cultivated fields and pastures. Open ground; moist or wet, sandy, loamy, muddy or clay, bare or sparsely vegetated soil. Nocturnal; hides during the day in the soil, in soil crevices, at the base of plants, under plant debris, moss carpets, algal mats, stones, and logs. Gregarious.

Biology. Seasonality: September–May, July–August. Tenerals: January–March. Occasionally infested with fungi (Laboulbeniales). Defence mechanism: when alarmed, the adult escapes by running or flying short distances.

Dispersal power. Wing-dimorphic. Macropterous (capable of flight) or brachypterous (incapable of flight). Slow runner. Vagility likely favoured by flight capacity.

Collecting techniques. Pouring water over the ground; treading the soil with the feet; turning debris and stones.

Reference. Larochelle and Larivière 2001: 80 (catalogue; biology, dispersal power, ecology, geographic distribution, references).

Remark. This is the most variable of all New Zealand Bembidion species. Morphological variation in terms of size, color, microsculpture, body shape, and length of membranous wings, encompasses the range previously attributed to Bembidion rotundicolle rotundicolle and B. rotundicolle eustictum . In addition, the configuration of the male aedeagus is stable across all populations studied. Consequently, there is no need to maintain the subspecific status of Bembidion rotundicolle eustictum and, together with its synonyms B. clevedonense and B. waikatoense , it is synonymized it with B. rotundicolle .

Figures

Figures 9–12. Dorsal habitus. 9) Bembidion embersoni. 10) B. brullei. 11) B. rotundicolle. 12) B. tairuense. Scale line = 1 mm.

Figures 45–52. Aedeagi, lateral. 45) Bembidion brullei. 46) B. rotundicolle. 47) B. tairuense. 48) B. granuliferum. 49) B. maorinum maorinum. 50) B. charile. 51) B. dehiscens. 52) B. actuarium.

Figures 95–100. Species distribution maps. 95) Bembidion rotundicolle. 96) B. solitarium. 97) B. stewartense. 98) B. tairuense. 99) B. tekapoense. 100) B. tepaki new species.