Pelodiaetodes

Sokolov, Igor M., 2015, Review of the species of Pelodiaetodes Moore (Coleoptera: Carabidae: Bembidiini: Anillina) of New Zealand, Zootaxa 3963 (4), pp. 561-582 : 571-572

Key to species of Pelodiaetodes from New Zealand based on males

1. Pronotum with distinct sinuation laterobasally and short subparallel basal constriction............................... 2

- Lateral sides of pronotum not sinuate basally, pronotum without subparallel basal constriction.......................................................................................(genera Zeanillus Jeannel , Nesamblyops Jeannel )

2. Head with obliterated fronto-lateral carinae. Elytra lacking longitudinal grooves..................... Hygranillus Moore

- Head with long and distinct fronto-lateral carinae. Elytra with longitudinal grooves................................. 3

3. Basal constriction of pronotum with distinct tubercle, bearing basolateral pronotal seta, anterior to the posterior angles..... 4

- Basal constriction of pronotum without tubercles or denticles anterior to the posterior angles.......... Pelodiaetus Jeannel

4. With 1 elytral discal seta ( Fig. 2 D, ed6). Pronotum moderately constricted basally (Wa/Wp <1.20; Wm/Wp <1.40). Beetles from South Island.................................................... Pelodiaetodes (Monosetodes) nunni , sp. n.

- With 3 elytral discal setae ( Fig. 2 C, ed3, ed5–6). Pronotum strongly constricted basally (Wa/Wp> 1.20; Wm/Wp> 1.40). Bee- tles from North Island.................................................................................. 5

5. Apex of median lobe subparallel and rounded at tip ( Fig. 7 D, G, J)............................................... 6

- Apex of median lobe tapering and pointed at tip ( Fig. 7 A, M)................................................... 7

6. Pronotum ( Fig. 6 B) more elongate (Wm/Le <1.15). Beetles larger (1.67–1.76mm). Range to the north of 34.6˚S latitude...................................................................... Pelodiaetodes (s.str.) constricticollis , sp. n.

- Pronotum ( Fig. 6 C–D) more transverse (Wm/Le> 1.15). Beetles smaller (1.18–1.51mm). Range to the south of 35˚S latitude......................................................................... Pelodiaetodes (s.str.) moorei , sp. n.

7. Apex of median lobe less tapering with acute tip ( Fig. 7 M). Island endemic from the east of New Zealand (Aldermen Islands)..................................................................... Pelodiaetodes (s.str.) aldermensis , sp. n.

- Apex of median lobe more tapering with acuminate tip ( Fig. 7 A). Mainland species from the west coast of New Zealand......................................................................... Pelodiaetodes (s.str.) prominens Moore

Figures

FIGURE 2. SEM illustrations of structural features of Pelodiaetodes species. Basal part of left elytron, dorsal aspect: A P. prominens; B P. nunni. Elytra, dorsal aspect: C P. prominens, D P. nunni. Legend: axt – auxillar tubercle; bm – basal margin; ed 2 – scutellar seta; ed 3 – ed 6 – discal elytral setae; ed 8 – apical elytral seta; eo 1 – 9 – setae 1 – 9 from the umbilicate series; eg – elytral groove; lb – lateral pronotal bead; sct – scutellum. Scale bars = 0.2 mm.

FIGURE 6. Digital images of pronota of Pelodiaetodes species. A P. prominens (NZ, Northland, Waipoua Forest); B P. constricticollis (NZ, Northland, Radar Bush), paratype; C P. moorei (NZ, Northland, Poor Knight Islands), paratype; D P. moorei (NZ, Northland, Puketi Forest); E P. aldermensis (NZ, Waikato, Aldermen Islands), paratype; F P. nunni (NZ, Otago, Oamaru), paratype. Scale bars = 0.5 mm.

FIGURE 7. Line drawings of male aedeagus of Pelodiaetodes species. P. prominens (NZ, Northland, Omahuta Forest): A median lobe, right lateral aspect; B left paramere, left lateral aspect; C right paramere, right lateral aspect. P. constricticollis (NZ, Northland, Radar Bush): D median lobe, right lateral aspect; E left paramere, left lateral aspect; F right paramere, right lateral aspect. P. moorei (NZ, Northland, Poor Knight Islands): G median lobe, right lateral aspect; H left paramere, left lateral aspect; I right paramere, right lateral aspect. P. moorei (NZ, Northland, Puketi Forest): J median lobe, right lateral aspect; K left paramere, left lateral aspect; L right paramere, right lateral aspect. P. aldermensis (NZ, Waikato, Aldermen Islands): M median lobe, right lateral aspect; N left paramere, left lateral aspect; O right paramere, right lateral aspect. P. nunni (NZ, Otago, Oamaru): P median lobe, right lateral aspect; R left paramere, left lateral aspect; S right paramere, right lateral aspect. Legend: dp – dorsal plate; vp – ventral plate. Scale bar = 0.1 mm.