Zeadalmodes brevis Nomura and Leschen, 2015

Nomura, Shûhei & Leschen, Richard A. B., 2015, Myrmecophilous Pselaphinae (Coleoptera: Staphylinidae) from New Zealand, The Coleopterists Bulletin 69 (1), pp. 121-152 : 121-152

Zeadalmodes brevis Nomura and Leschen , new species

( Figs. 12B , 16, 17 )

Description. Female. Body length 2.72–2.74 mm, width 0.80–0.84 mm, elongate, smaller than female of Z. myrmecophilus ( Fig. 16A, B). Antennal length 1.00– 1.02 mm, elongate, clearly narrower than that of Z. myrmecophilus , relative length (width) of each antennomere from base to apex to width of antennomere I: 0.8 (1.0); 1.1 (0.7); 1.0 (0.6); 0.8 (0.6); 0.8 (0.6); 0.6 (0.6); 0.7 (0.6); 0.6 (0.6); 0.9 (0.7); 0.9 (0.8); 2.5 (1.1) ( Fig. 17D ). Maxillary palpi elongate and curved, palpomere IV largest, slightly longer than II, nearly fusiform ( Fig. 17C ). Abdominal tergite IV large and transverse, slightly narrower than elytra, clearly shorter than tergite V ( Fig. 17G ).

Distribution. North Island. Coromandel (CL), Wellington (WN).

Host Ant. Austroponera castanea (Ponerinae) .

Remarks. This species, known only from females, is easily separable from Z. myrmecophilus by the smaller body, narrower antennae, and very short fourth abdominal segment.

Specimens Examined. Holotype, female (carded with host ant separately [ant: Austroponera castanea ]), New Zealand WN Catchpool Stm Rimutaka FP 19. iv. 1991 [hand-written in pencil] // HOLOTYPE Staphylinidae Staphylinidae , Pselaphinae Zeadalmodes brevis Nomura et Leschen S. Nomura det., 2013 [red label]. Paratypes: CL: 1 female, Square Kauri Tk (ant nest), Coromandel Rng., 3. xi. 2005, S. Nomura leg. WN: 1 female, Karori Reservoir (in decayed wood) 0646, 8. i. 1995 [J.T. Nunn]; 1 female, same locality as above, 4. iii. 1995 [J.T. Nunn].

PSELAPHINAE : EUPLECTITAE: TROGASTRINI : TROGASTRINA

Figures

Fig. 12. Zeadalmodes species, habitus. A) Z. myrmecophilus, male holotype, B) Z. brevis, female paratype. Scale = 1 mm.

Fig. 17. Zeadalmodes brevis, female. A) Head and prothorax, dorsal view, B) Head and prothorax, ventral view, C) Maxillary palpus, ventral view, D) Left antenna, dorsal view, E) Meso- and metathoraces, ventral view, F) Elytra, dorsal view, G) Abdomen, dorsal view, H) Abdomen, ventral view.