Adalmus kanierensis Byeon & Chandler, 2024

Byeon, Ui-Joung, Chandler, Donald S., Leschen, Richard A. B. & Park, Jong-Seok, 2024, Revision of the New Zealand genus Adalmus with description of six new species (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae 64 (1), pp. 17-32 : 21-22

Adalmus kanierensis Byeon & Chandler , sp. nov.

( Figs 3 , 10 )

Type material. HOLOTYPE: J (genitalia dissected, NZAC): “NEW ZEALAND: WD Lake Kaniere Road , 2.8km nw Lake Kaniere 120m, 8–19.i.1985 podocarp-hdwd. forest A.Newton / M.Thayer 732 // flight intercept (window) trap” . PARATYPES: SOUTH ISLAND: WD [Westland]: same data as holotype (1 J, genitalia dissected, FMNH); 2.7km se Lake Moeraki 30m, 10–18.i.1985 hdwd.-podocarp forest A.Newton/M.Thayer 736 // flight intercept (window) trap (1 J FMNH).

Diagnosis. Males of this species can be distinguished from other Adalmus species by the following characters: antennomere I approximately twice as long as II ( Fig. 3A ); pro- and metatrochanters unmodified ( Figs 3B, D ), mesotrochanter with distinct thin spine ( Fig. 3C ; arrow); right paramere larger than left paramere, slightly curved at middle; median lobe with short spine at base, long spine at basal 1/4, curved spine at apex, with small foramen at apical 1/3 ( Figs 3E–G ).

Description. BL 2.01–2.10 mm (FBL 1.54–1.68 mm); body, antenna, and legs reddish-brown, maxillary palpus and tarsi yellowish-brown; body pubescent.

Head slightly broader than long (HL: HW = 38: 45), widest across eyes, rostrum broad (HW: RW = 45: 27), impression between ridges of antennal tubercles weak, ridges of antennal tubercles parallel; apex of rostrum strongly projecting, clypeus not visible in dorsal view; antennal length approximately 0.94–0.97 mm, antennomere I slightly broader than II, antennomere II longer and wider than III–VIII, antennomere V longest among III–VIII, antennomeres IX–XI forming indistinct club.

Thorax. Prothorax wider than head (HW: PW = 45: 51), subhexagonal (PL: PW = 50: 51), broadest at anterior 2/5, gently narrowing at middle, narrowest at anterior margin.

Elytra broader than pronotum (EW: PW = 80: 51), slightly broader than long (EL: EW = 67: 80); with sutural striae; weak impression at elytral foveae; subhumeral foveae present, not visible in dorsal view.

Legs. Pro- and metatrochanters with smooth posterior margin; profemur rugose on ventral side; mesotrochanter with distinct thin spine; tibiae and femora of similar length, moderately long.

Aedeagus asymmetric, 0.38 mm long, with diaphragm and basal stem, basal stem long; parameres asymmetric, right paramere larger than left paramere, right paramere slightly curved at middle; median lobe with short spine at base, long spine at basal 1/4 and curved spine at apex, with small foramen at apical third.

Sexual dimorphism. Female unknown.

Etymology. The specific epithet is an adjective derived from the type locality ʻKaniereʼ.

Distribution. New Zealand (South Island: WD, Fig. 10 ).

Figures

Fig. 3. Adalmus kanierensis sp. nov. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 10. Collection localities in New Zealand.