Euglyptus longicornis Broun, 1912

Byeon, Ui-Joung, Chandler, Donald S., Leschen, Richard A. B. & Park, Jong-Seok, 2025, Revision of the New Zealand genus Euglyptus (Coleoptera: Staphylinidae: Pselaphinae) with eight new species, Acta Entomologica Musei Nationalis Pragae 65 (1), pp. 31-59 : 48-49

Euglyptus longicornis Broun, 1912

( Figs 9 , 15 )

Euglyptus longicornis Broun, 1912: 404 . Type locality: Raurimu [TO]. Euglyptus longicornis : HUDsON (1923: 364); NOMURA & LEsCHEN (2006: 247).

Type material. HOLOTYPE: J, “[red-bordered disc] Type / 3197 / Raurimu / Jany 1910 / New Zealand [with red underline] Broun Coll. Brit. Mus. 1922-482. / Microtyrus longicornus” ( BMNH).

Additional material examined. NEW ZEALAND: NORTH ISLAND: WN [ Wellington]: Tararua Forest Park Waiotauru Rd 1 Jun 1999 E. Spurr (1 J genitalia dissected; NZAC). Tararua Forest Park Waiotauru Rd 18 May 1999 E. Spurr (1 J abdomen lost; NZAC). Tararua Forest Park off Waiotauru Rd 11 Aug 1998 E. Spurr (1 J slide mounted; NZAC). SOUTH ISLAND: NN [ Nelson]: Upper Maitai 7-3-49 E.S.Gourlay. [7-3- 49 handwritten] (1 J genitalia dissected; NZAC). Slaters Road, 0.7km s Whangamoa Saddle, 410m 13.xii.1984 - 4.i.1985 Nothofagus spp forest A.Newton/M.Thayer 703 // flight intercept (window) trap (3 JJ genitalia dissected; FMNH). SD [ Marlborough Sounds]: Tennyson Inlet, east side Duncan Bay, 30m 15.xii.1984 - 5.i.1985 podo.- Nothofagus for. A.Newton/M.Thayer 709 // flight intercept (window) trap (1 J slide mounted; DSC).

Diagnosis. Males of this species can be distinguished from other Euglyptus species by the following combination of characters: body 1.31–1.41 mm (forebody 0.99–1.03 mm) ( Fig. 9A ); antennomere XI slightly wider than X, subhexagonal ( Fig. 9C ); pronotum gradually widening from anterior margin to middle, widest in middle, gradually narrowing from middle to posterior margin, with broad median longitudinal sulcus and transverse antebasal sulcus, with short median antebasal carina from transverse antebasal sulcus to base ( Fig. 9B ); both parameres similar in length, elongate, left paramere slightly curved medially to broadly rounded apex, with smooth margin in ventral view, right paramere broad at base, abruptly narrowing toward to near apex to form elongate acute point, slightly angled ventrally in lateral view; median lobe longer than parameres, broadly and evenly curved dorsally to truncate apex in lateral view, apex deflexed anteriorly in dorsal view ( Figs 9E–J ).

Redescription. Body 1.31–1.41 mm (forebody 0.99–1.03 mm); head and thorax impunctate; head, thorax, abdomen, and antennal scape darkish-brown, elytra, leg, pedicel, and antennomeres III–XI reddish-brown, tarsus and maxillary palpus yellowish-brown ( Fig. 9A ).

Head slightly wider than long, with small dorsal tentorial pits, impression around dorsal tentorial pits weakly defined; temples gradually narrowing toward posterior margin of head capsule, with several setae; impression between antennal tubercles as wide as antennal tubercle diameter. Pedicel wider and longer than antennomeres III–VIII, V longer than III–IV, VI–VIII subretangular, VI–VII slightly longer than wide, VIII as long as wide, IX–X as long as wide, subhexagonal, XI slightly wider than X ( Figs 9A, C ).

Pronotum as wide as head, slightly longer than wide, narrowest at apex, gradually widening from anterior margin to middle, widest in middle, gradually narrowing from middle to posterior margin, with broad median longitudinal sulcus and transverse antebasal sulcus, with short median antebasal carina extending from transverse antebasal sulcus to posterior margin ( Fig. 9B ).

Elytra and abdominal tergites without any distinguishing characters ( Figs 9A, D ).

Male genitalia. Both parameres similar in length, elongate, left paramere slightly curved medially to broadly rounded apex, with smooth margin in ventral view, right paramere broad at base, abruptly narrowing toward to near apex to form elongate acute point, slightly angled ventrally in lateral view; median lobe longer than parameres, broadly and evenly curved dorsally to truncate apex in lateral view, apex deflexed anteriorly in dorsal view ( Figs 9E–J ).

Distribution. New Zealand (North Island: WN, South Island: NN, SD; Fig. 16A ).

Figures

Fig. 9. Euglyptus longicornis Broun, 1912. A – habitus dorsal view; B – pronotum; C – apical antennomeres; D – abdominal tergites IV–V; E, F – aedeagus ventral view; G, H – aedeagus lateral view; I, J – aedeagus dorsal view. Scale bars: A = 1 mm; B–J = 0.1 mm.

Fig. 15. Euglyptus waimatensis sp. nov. A – habitus dorsal view; B – pronotum; C – apical antennomeres; D – abdominal tergites IV–V; E, F – aedeagus ventral view; G, H – aedeagus lateral view; I, J – aedeagus dorsal view. Scale bars: A = 1 mm; B–J = 0.1 mm.

Fig. 16. Collection localities of New Zealand for Euglyptus species.