Bembidion (Zeactedium) orbiferum Bates 1878
Creators: name: Larochelle, André
name: Zeperyphodes
name: Broun
name: Larivière, Marie-Claude
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Bembidion
Bembidion orbiferum

description: Bembidion (Zeactedium) orbiferum Bates, 1878   
Fig. 21, 54, 92  
 Bembidium orbiferum Bates, 1878b: 24. Type locality: West Coast, South Island.   
Other synonymy as in Larochelle and Larivière (2001: 81).  
 Description. Body length 6.0– 7.3 mm. Black; apex of elytra with a yellowish oblique subapical marking; antennae and legs yellowish (antennal segments 4–11 infuscated). Microsculpture feeble, irregularly isodiametric on head, consisting of confluent transverse lines on pronotum, irregularly isodiametric to slightly transverse with a tendency to form transverse meshes on elytra; microsculpture stronger in female. Moderately shiny (elytra dull in female), with metallic lustre (aeneous, greenish, bluish). Head. Antennae very long (reaching about basal third of elytra). Thorax. Pronotum strongly convex; sides strongly rounded, strongly sinuate posteriorly; basal constriction very short; posterolateral angles acute, strongly projected laterally, rather sharp at tip; laterobasal foveae very deep, linear, short, not reaching basal margin. Elytra. Strongly convex. Sides slightly rounded about middle. Striae deep, becoming shallower apically, coarsely punctate; stria 7 strong, coarsely punctate. Apical striole deep, connected to stria 7. Aedeagus. Lateral view (Fig. 54): moderately arcuate, strongly widened in apical half; base strongly convex dorsally; middle strongly convex dorsally, slightly convex ventrally, with dorsal membranous area wide and moderately long; apex subtriangular, slightly convex dorsally, moderately concave ventrally, with extreme tip moderately wide and long.   
 Material examined. 31 specimens (NZAC).   
 Geographic distribution (Fig. 92). South Island: BR, FD, MK, NN, OL, WD.   
 Ecology. Lowland, montane. Fossorial. River banks and beds, at a certain distance (2–7 m) from water. Open ground; moist, soft, sandy (yellow), bare or sparsely vegetated soil. Nocturnal; hides during the day in the sand and under well embedded stones.   
Gregarious.  
 Biology. Seasonality: September, December–March. Tenerals: December–March. One specimen 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; turning stones.   
 References. Larochelle and Larivière 2001: 81 (as Bembidion (Zeactedium) orbiferum; catalogue; biology, dispersal power, ecology, geographic distribution, references); Toledano 2005: 123 (taxonomy).   
 Remark. Lindroth (1976) recorded this species from eight localities. Three new South Island localities are added from NN (Tadmor River Bridge) and WD (Junction Littleman River and Highway 6; Karangarua River, between Rough Creek and Highway 6).
description: Published as part of Larochelle, André, Zeperyphodes, Broun & Larivière, Marie-Claude, 2015, Synopsis of the genus Bembidion Latreille in New Zealand (Coleoptera: Carabidae: Bembidiini), pp. 1-78 in Insecta Mundi 2015 (415) on pages 31-32, DOI: 10.5281/zenodo.5181756