Agaricomorpha hampshirensis Klimaszewski and Chandler, 2023

Klimaszewski, Jan, Chandler, Donald S., Davies, Anthony & Bourdon, Caroline, 2023, Aleocharine rove beetles of New Hampshire, USA: new taxa and new records (Coleoptera, Staphylinidae, Aleocharinae), Zootaxa 5364 (1), pp. 1-141 : 75

145. Agaricomorpha hampshirensis Klimaszewski and Chandler sp. n.

Figs. 9a–g , Table 1

Holotype (male). USA, New Hampshire, Rock. Co.: 1 mi W Odiorne Pt., 23–26.VII.1993, D.S. Chandler, malaise trap ( CNC) . Paratypes: USA, Maine, York Co.: West Lebanon, 9–15.IV.1991, 19–25.IV.1990, 12–18.VI.1990, D.W. Barry, FIT, 3 females . New Hampshire, Carroll Co.: 1 mi N Wonalancet, E Fk. Spring Brk., 7–13.VIII.1985, 1900’, D.S. Chandler, fl. intercept trap, 1 female. Grafton Co. : Bedell Bridge St. Park @ Oliverian Brook, 7–24.V.1992, 1 male; 25.V–7.VI.1992, D.S. Chandler, FITrap, 1 male, 1 female, 1 sex?; Bedell Bridge St. Park @ Oliverian Brook, Haverhill, 2.X.1991, D.S. Chandler, sift forest litter, 2 males. Strafford Co. : East Foss Farm, 32m, 1 km S Durham, 20.IX.2007, A.R. Kennedy, sweep, old burned field, 1 sex?

Etymology. The specific name of this species is derived from New Hampshire, the state where most of the type series was captured.

Diagnosis. Agaricomorpha hampshirensis may be distinguished from its Nearctic congeners by its short and narrow pronotum (shorter than elytra at suture), dark brown to almost black head contrasting with paler (yellowish- brown) pronotum and elytra ( Fig. 9a ), distinct shape of median lobe of aedeagus with tubus broad, strongly bent ventrad at middle of its length and acutely pointed apically in lateral view ( Fig. 9b ), and apical margin of male tergite VIII entire and arcuate (without lateral teeth) ( Fig. 9c ). Female terminalia and spermatheca of generalized shape and without taxonomic significance.

Description. Body narrowly oval, small ( Fig. 9a ), length 2.0–2.3mm, sparsely pubescent, surface glossy, microsculpture of head and pronotum weak; head dark brown to almost black, pronotum and elytra paler, yellowish-brown, abdomen dark brown with yellow-brown base; head transverse, eyes large and protruding, antennae yellow with antennomeres VIII–X moderately transverse; pronotum broad and short, shorter at midline than elytra at suture; elytra broadening posteriad, posterior corners rounded and lateral emarginations distinct; abdomen arcuate laterally, at base narrower than elytra. Male. Tergite VIII arcuate posteriorly ( Fig. 9c ); sternite VIII parabolic apically, antecostal suture sinuate ( Fig. 9d ); tubus of median lobe of aedeagus broad, strongly bent medially ventrad and acutely pointed apically in lateral view ( Fig. 9b ). Female. Tergite VIII emarginate medially ( Fig. 9e ); sternite VIII slightly produced apically and pointed medially ( Fig. 9f ); spermathecal capsule globose and extended to a short neck, stem very short ( Fig. 9g ).

Distribution. Nearctic. Known only from Maine and New Hampshire in the USA.

Collection and Habitat data. The type series was captured in Malaise and flight intercept traps, also by sweeping an old burned field, and by sifting forest litter. Collected from April to October.

Comments. Judging from the collecting methods (mainly Malaise and flight intercept traps), the species is an active flier and disperses well.

Figures

FIGURE 9a–g. Agaricomorpha hampshirensis Klimaszewski and Chandler sp. n.: (a) habitus in dorsal view; (b) median lobe of aedeagus in lateral view; (c) male tergite VIII; (d) male sternite VIII; (e) female tergite VIII; (f) female sternite VIII; (g) spermatheca. Scale bar for habitus = 1mm; remaining scale bars = 0.2mm.