Eusphalerum klimaszewskii Zanetti, 2014

Zanetti, Adriano, 2014, Taxonomic revision of North American Eusphalerum Kraatz, 1857 (Coleoptera, Staphylinidae, Omaliinae), Insecta Mundi 2014 (379), pp. 1-80 : 10-11

Eusphalerum klimaszewskii Zanetti , n. sp.

Material examined. (21 specimens)

Holotype m 1 paratype m 1 f 1 spec. incomplete, British Columbia Mt. Cain 50 o 13’N 126 o 22’W 23.06/ 7.07.1997 leg. N. Winchester (MCSNV).

Other paratypes: CANADA. British Columbia 2 mm 1 f Mt. Cain 50 o 13’N 126 o 21’W 23.05/ 9.06.1997 leg. N. Winchester (cZan) ; 3 ff Mt. Cain 50 o 13’N 126 o 22’W 23.05/ 9.06.1997 leg. N. Winchester (cZan) ; 3 spec. incomplete Mt. Cain 50 o 13’N 126 o 22’W 9.06/ 23.06.1997 leg. N. Winchester (cZan) ; 1 spec. incomplete Mt. Cain 50 o 13’N 126 o 22’W 23.05/ 9.06.1997 leg. N. Winchester (cZan) ; 1 m 1 f Mt. Cain 50 o 15’N 126 o 25’W 23.05/ 9.06.1997 leg. N. Winchester (cZan) ; 1 f Mt. Cain 50 o 15’N 126 o 25’W 9.06/ 23.06.1997 leg. N. Winchester (cZan) ; 1 f Mt. Cain 50 o 15’N 126 o 25’W 23.06/ 7.07.1997 leg. N. Winchester (cZan) ; 1 f Aberni (38 mi. W) 24/ 25.05.1968 leg. Campbell & Smetana (CNC) ; 2 ff Carmanah Valley (upper) UTM 10UCJ 802998 21.06/ 3.07.1991 leg. N. Winchester (FMNH) .

Measurements. head length: 0.33-0.35; head width: 0.64-0.66; pronotal length: 0.64-0.65; pronotal width: 0.75-0.81; elytral length: 1.44-1.48; elytral width: 1.29-1.33; length (clypeus to apex of elytra): 2.36-2.70; total length: 2.7-2.9.

Etymology. The species is dedicated to Jan Klimaszewski, specialist of Staphylinidae , who provided me most specimens of the type series.

Description. Habitus as in Fig. 14 . Head, pronotum, abdomen, and ventral surface blackish, sometimes brown; elytra yellowish to brown, always lighter than rest of body; legs, antennae, and mouthparts yellowish, antennae sometimes very feebly darkened at apex.

Head with strongly prominent eyes, postocular carina extremely reduced, almost absent, temples very short, strongly convergent caudad, medial margin of eyes without longitudinal wrinkles, microsculpture formed by elongate meshes. Clypeus prolonged anterad. Postantennal depressions not much impressed, slightly confluent with the small tentorial pits. Neck separeatd from head. Punctation very dense and rather strong, somewhat confluent, ground with superficial microsculpture. Antennae elongate, all antennomeres longer than wide, 4 clearly narrower than 5, 11 almost ovoid, more than twice as long as wide.

Pronotum scarcely transverse (ratio width/length = 1.2 on average), impressed medially in front of posterior margin, convex, widest in front of middle, somewhat narrowed anterad, anterior margin clearly shorter than posterior, lateral margins rounded in anterior two thirds, convergent caudad in almost straight line, posterior angles marked and slightly obtuse. Punctation very dense and rather coarse, ground glossy with very superficial microsculpture, pubescence very long, whitish, depressions near posterior angles narrow, extended in front of middle of lateral margins.

Elytra scarcely elongate (ratio length from scutellum to apex / combined width of elytra = 1.1), scarcely widened towards apex, truncate in middle in both sexes, punctation coarser and somewhat less dense than on pronotum, confluent on glossy ground, pubescence long, whitish and decumbent.

Abdomen dull, microsculpture clearly visible, formed by almost isodiametric meshes, pubescence long, decumbent.

Tibiae straight in both sexes, not modified, tarsomere 5 of posterior tarsi somewhat shorter than 1- 4 together.

Aedeagus as in Fig. 15 .

Accessory sclerites of female as in Fig 16 , spermatheca as in Fig. 17 .

Comparative notes. Dark color, long white pubescence, rather narrow pronotum, and long yellowish antennae make this species easily recognizable among North American Eusphalerum . The related species of the subangulatum group are light and have a wider pronotum.

Distribution. CANADA: British Columbia (Map 4), known only from Vancouver Island.

Natural history. All specimens were collected in forest sites. No information about host plants is available, as specimens were collected mostly by traps. Captures between May and beginning of July.

Figures

Figures 14-29. Eusphalerum klimaszewskii. 14) Habitus (male). 15) Aedeagus. 16) Female accessory sclerites. 17) Spermatheca. E. torquatum. 18) Habitus (male). 19) Head. 20) Aedeagus. 21) Female elytra. 22) Female accessory sclerites. 23) Spermatheca. E. aurifluum. 24) Habitus (male); 25) Aedeagus. 26) Male sternite VIII. 27) Female elytra. 28) Female accessory sclerites. 29) Spermatheca. Scale of photos = 1 mm, scale A (Fig. 15, 16, 20, 22, 25, 28) = 0.3 mm; scale B (Fig. 17, 23, 29) = 0.1 mm; scale C (21, 27) = 1.0 mm; scale D (19) = 0.5 mm.