Atheta (Microdota) macesi Klimaszewski & Webster

Klimaszewski, Jan, Webster, Reginald P., Sikes, Derek, Bourdon, Caroline & Labrecque, Myriam, 2015, A review of Canadian and Alaskan species of the genera Clusiota Casey and AthetaThomson, subgenusMicrodota Mulsant & Rey (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 524, pp. 103-136 : 118

Taxon classification Animalia Coleoptera Staphylinidae

Atheta (Microdota) macesi Klimaszewski & Webster sp. n. Figs 84-87

Holotype (male).

Canada, New Brunswick, Saint John Co., ca 2 km NE of Maces Bay, 45.1161 N, 66.4560 W, 8.V.2006, R.P. Webster, coll. // Eastern white cedar swamp, in sphagnum and litter near brook (LFC).

Etymology.

The specific name macesi is an adjective derived from Maces Bay in NB, where the holotype specimen was found.

Diagnosis.

Body length 2.7 mm, subparallel, flattened, brownish-black, tibiae and tarsi brown (Fig. 84); integument glossy and more so on abdomen, sparsely punctate and pubescent, except for pronotum and elytra; microsculpture of forebody dense and strong, meshed with hexagonal sculpticells; head about as wide as pronotum, slightly angular posteriorly, eyes large and as long as postocular area dorsally; antennae with articles V−X moderately to strongly transverse; pronotum broadest in apical third and narrowest at base, rounded laterally and basally, transverse, narrower than elytra; elytra wider and slightly longer than pronotum; abdomen subparallel. MALE. Tergite VIII truncate apically and with two large lateral teeth (Fig. 85); sternite VIII rounded apically (Fig. 86); median lobe of aedeagus with small bulbus and long tubus, in lateral view tubus straight and apex slightly produced ventrally, apex narrowly triangular and slightly pointed (Fig. 87), internal sac structures well defined (Fig. 87). FEMALE. Unknown.

Natural history.

A single male was found in eastern white cedar in sphagnum and litter near a brook, in May.

Distribution.

Known only from NB, Canada.

Comments.

This species is known only from a single male collected in sphagnum and litter.