Eusphalerum chatzimanolisi Zanetti, 2014

Zanetti, Adriano, 2014, Taxonomic revision of North American Eusphalerum Kraatz, 1857 (Coleoptera, Staphylinidae, Omaliinae), Insecta Mundi 2014 (379), pp. 1-80 : 31-32

Eusphalerum chatzimanolisi Zanetti n. sp.

Material examined (2 specimens)

Holotype m 1 paratype m California Fresno Co Sequoia NF FS 13 S21 36.8105 oN 118.9670 oW 8.06.2006 leg. Caterino & Chatzimanolis (SBMNH)

Measurements. head length: 0.25-0.27; head width: 0.48-0.51; pronotal length: 0.44-0.46; pronotal width: 0.64-0.70; elytral length: 1.20-1.33; elytral width: 0.96-10.3; length (clypeus to apex of elytra): 1.85-1.97; total length: 2.

Etymology. The species is dedicated to one of its collectors, Stylianos Chatzimanolis, student of systematics of Staphylinidae .

Description. Habitus as in Fig. 93 . Head, pronotum, and elytra yellowish, elytra somewhat paler, neck somewhat darkened; abdomen brown (male); prosternum yellowish; metasternum pale brown; legs, antennae, and mouthparts yellowish, antennae strongly darkened from antennomere 6.

Head with prominent eyes, postocular carina absent, temples short, strongly convergent caudad, medial margin of eyes microsculptured without longitudinal wrinkles. Head rather flat, postantennal depressions very superficial, tentorial pits small but well impressed. Neck not separated from head medially. Punctation rather sparse, superficial, ground with isodiametric microsculpture. Antennae elongate, antennomere 1 and 2 segments twice as long as wide, 3 long and thin, three times as long as wide, 4 -5 twice as long as wide, 6 and 7 longer than wide, 8 -10 wider than long, 11 twice as long as wide, ovoid at base and conical at apex.

Pronotum transverse (ratio width/length = 1.5), convex, widest just in front of middle, anterior margin much narrower than posterior, lateral margins strongly convergent anteriad, rounded in middle, and scarcely convergent caudad in almost straight line, posterior angles marked and scarcely obtuse. Punctation very sparse, superficial, and irregular, ground with isodiametric microsculpture, pubescence very short, scarcely visible, depressions near posterior angles scarcely impressed.

Elytra strongly elongate (ratio length from scutellum to apex / combined width of elytra = 1.2), scarcely widened towards apex, rounded at apex, punctation much denser and stronger than on pronotum, confluent on glossy ground, pubescence very short, almost invisible.

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

Sternite VII emarginate medially as in Fig. 95 .

Aedeagus as in Fig. 94 (internal sac partly extruded).

Female unknown.

Comparative notes. Eusphalerum chatzimanolisi is very similar to E. convexum and E. fraternum in external characters: only the very sparse pronotal punctation is distinctive. The shape of the posterior margin of abdominal sternite VIII of the male is also different, recalling E. carolinensis , which differs in having the posterior half of the lateral margins of the pronotum convergent. The shape of the internal sac of the aedeagus is also characteristic.

Distribution. UNITED STATES: California (Map 1).

Natural history. The type specimens were collected in June in forest at about 1800 m a.s.l. (altitude inferred from coordinates), host plants not known.

Figures

Figures 93-108. Eusphalerum chatzimanolisi.93) Habitus (male).94) Aedeagus.95) Male sternite VII.E. rugulosum. 96) Habitus (male). 97) Habitus (female). 98) Aedeagus. 99) Head and pronotum. 100) Female accessory sclerites. 101) Spermatheca. E. caterinoi. 102) Habitus (male); 103) Aedeagus. 104) Female accessory sclerites. 105) Spermatheca. 106) Sternite VIII of male. 107) Sternite of male genital segment. 108) Apex of abdomen, ventral view. Scale of photos = 1 mm, scale A (Fig. 94, 95, 98, 100, 103, 104, 106, 107) = 0.3 mm; scale B (Fig. 101, 105) = 0.1 mm, scale D (Fig. 99) = 1 mm; scale H (Fig. 108) = 0.1 mm.