Euglyptus foveicollis 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 : 46

Euglyptus foveicollis Broun, 1912

( Figs 7 , 16 )

Euglyptus foveicollis Broun, 1912:403 (#3196). Type locality: Retaruke, near Erua [TO].

Euglyptus foveicollis : HUDsON (1923: 364); NOMURA & LEsCHEN (2006: 247).

Type material. HOLOTYPE: J, “[red-bordered disc] Type / 3196 / Retaruke / March 1910 / New Zealand [with red underline] Broun Coll. Brit. Mus. 1922-482. / Microtyrus foveicollis ” ( BMNH).

Additional material examined. NEW ZEALAND: NORTH ISLAND: GB [ Gisborne]: L.Waikaremoana, Whareama Peninsula Dec 2004 FIT, Station 5 38.46’S, 177.02’E (1 J slide mounted, 4 JJ genitalia dissected, 3 JJ; NZAC).Te Urewera NP L. Waikaremoana December 2004 Station 3 FIT 38.44S, 177.02E (1 J genitalia dissected, 1 J; NZAC). HB [ Hawkes Bay]: Kaweka Ra Makahu Hut, 975m 13 Mar 1980 C.F.Butcher (1 J genitalia dissected; NZAC). Puketitiri Little Bush 20 Feb 1986 T.H. Davies // Malaise trap (1 J genitalia dissected; NZAC). Balls Clearing Scenic Reserve 21 Oct 1984 C.F.Butcher // Sifted litter and rotten wood 84/72 // Duplicate specimens in alcohol (1 J slide mounted; NZAC). TO [ Taupo]: Coll. T.Broun May. 1911 [handwritten] // Retaruke nr. Erua, N.Is. [handwritten] main Trunk. R. [handwritten] // 3190 [handwritten] // Thorax grooved [handwritten, unintelligible] // Euglyptus foveicollis Broun.Var. [handwritten] // A.B.Brookes Collection (1 J genitalia dissected, 1 J; NZAC). Coll. H.S.Whitehorn May. 1911. [handwritten] // Retaruke nr. Erua N.Is. Main Trunk ♀ [handwritten] // 3196 var. [handwritten] // Euglyptus foveicollis Broun. [handwritten] // A.B.Brookes Collection ( 1 ♀; NZAC). Ohakune Waitonga Falls Track 4 Nov 2004 A C Eyles // Moss on ground & fallen branch Moss lichen bark live trees including Mountain beech (1 J genitalia dissected; NZAC).Kaimanawa North Forest Park, 850m 11 Mar 1978 J.S.Dugdale // mosses 78/118 (1 J genitalia dissected; NZAC). WO [ Waikato]: Mt Karioi nr Smt 11 Oct 1981 C.F.Butcher Litter 81/94 (1 J genitalia dissected; NZAC).

Diagnosis. Males of this species can be distinguished from other Euglyptus species by the following combination of characters: body 1.41–1.51 mm (forebody 1.07–1.11 mm) ( Fig. 7A ); antennomere X as wide as XI, widening to apex ( Fig. 7C ); pronotum gradually widening from anterior margin to middle, widest in middle, slightly narrowing from middle to posterior margin, with shallow median longitudinal sulcus and transverse antebasal sulcus ( Fig. 7B ); both parameres similar in length, left paramere gradually narrowing to apex, with two small apical teeth in ventral view, right paramere formed as broad subtriangular plate in lateral view; median lobe with complex structure, elongated branch extends from point of apical 1/3, apex of branch with sharply bifurcate apophysis, median lobe forming cylindrical structure, apical margin somewhat pointed ( Figs 7E–J ).

Redescription. Body 1.41–1.51 mm (forebody 1.07–1.11 mm); head and thorax impunctate; head, thorax, abdomen, elytra, leg, and antenna reddish-brown, tarsus and maxillary palpus yellowish-brown ( Fig. 7A ).

Head 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 narrower than diameter of antennal tubercle. Pedicel wider than antennomeres III–VIII, antennomeres III–V longer than wide, subrectangular, VI–VII as long as wide, subquadrate, VIII smallest, IX slightly wider than long, subhexagonal, X as wide as XI (8: 8), widening to apex ( Figs 7A, C ).

Pronotum wider than head, slightly longer than wide, narrowest at apex, gradually widening from anterior margin to middle, widest in middle, slightly narrowing from middle to posterior margin, with shallow median longitudinal sulcus and transverse antebasal sulcus ( Fig. 7B ).

Elytra and abdominal tergites without any distinguishing characters ( Figs 7A, D ).

Male genitalia. Both parameres similar in length, left paramere gradually narrowing to apex, with two small apical teeth in ventral view, right paramere formed as broad subtriangular plate in lateral view; median lobe with complex structure, elongated branch extends from point of apical 1/3, apex of branch with sharply bifurcate apophysis, median lobe forming cylindrical structure, apex margin somewhat pointed ( Figs 7E–J ).

Distribution. New Zealand (North Island: GB, HB, TO, WO; Fig. 16B ).

Figures

Fig.7. Euglyptus foveicollis 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. 16. Collection localities of New Zealand for Euglyptus species.