taxonID	type	description	language	source
AFFA2F3D7128607210CEFA2DA6835501.taxon	diagnosis	Diagnosis. Body dark brown to black, compact and robust, subparallel (Figs 1 a, 2 a, b, 3 a, 4 a), length 3.5 - 4.3 mm; integument with distinct meshed microsculpture; head large with mandibles extremely long and sickle-shaped, apices very slender, each crossing the other in resting position, each mandible bearing long spine or tooth (Figs 1 h, i, 2 i, j, 3 h, i, 4 h, i); infraorbital carina strong and complete; ligula more or less deeply bilobed (Figs 1 l, 2 m, 3 l, 4 l); last article of maxillary palpus needle-shaped (Figs 1 k, 2 l, 3 k, 4 k); frontal suture of head absent; anterior margin of mesosternum with short V-shaped basal carina, remaining mesosternum uncarinated; mesosternal process long, triangular basally and then narrowly produced and extending to about 3 / 4 length of mesosternal cavities, metasternal process triangular in shape and short, isthmus short; median lobe of aedeagus with large crista apicalis, internal sac structures variable in shape (Figs 1 b, 2 c, 3 b, 4 b), paramere with narrowly elongate apical lobe bearing four macrosetae; spermatheca pipe-shaped with spherical or tubular capsule and elongate narrow stem (Figs 1 e, 2 d, 3 e, 4 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
9C5BFBA0604103C7880E4B27D3672679.taxon	diagnosis	Diagnosis. Body length 3.5 - 4.0 mm, sides subparallel; body colour light brown to dark brown, antennae and tarsi rust-brown, head and abdomen often dark brown; integumental microsculpture dense and surface moderately glossy; head round and almost as wide as pronotum with labrum bearing long spines; pronotum transverse, angular, wider than maximum width of elytra; elytra at suture subequal in length to pronotum; abdomen subparallel; antennal articles 6 - 10 moderately-to-strongly transverse, last article short and broadly oval (Fig. 1 a). MALE: tergite VIII widely truncate apically (Fig. 1 c); sternite VIII slightly pointed at apex (Fig. 1 d); median lobe of aedeagus with tubus arcuate and apex pointed and produced ventrally in lateral view (Fig. 1 b). FEMALE: tergite VIII truncate apically (Fig. 1 f); sternite VIII rounded apically (Fig. 1 g); spermatheca pipe-shaped, with short sac-shaped capsule and long, thin and sinuate stem, spermathecal neck weakly sclerotized and neck to capsule angle variable (Fig. 1 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
9C5BFBA0604103C7880E4B27D3672679.taxon	distribution	Distribution. The Canadian distribution of this native Nearctic species includes Alberta [new provincial record], British Columbia (Majka and Klimaszewski 2008), and Yukon Territory (Map 1). It is also known from California (Fenyes 1909).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
4AFD9A27A7FE701A1589C9B8CE56DE83.taxon	diagnosis	Diagnosis. Body length 2.5 - 3.7 mm, sides subparallel; body colour light brown to almost black, with antennae, tarsi and often elytra and apical part of abdomen rust-brown; integumental microsculpture dense and surface strongly glossy; head round (Fig. 2 a) to somewhat quadrate (Fig. 2 b) and almost as wide as pronotum, labrum with short fine setae but lacking coarse spines; pronotum transverse, subequal to slightly narrower than maximum width of elytra, corners somewhat angular; elytra at suture subequal in length to pronotum; abdomen subparallel; antennal articles 6 - 10 subquadrate, last article short and broadly oval (Fig. 2 a, b). MALE: tergite VIII widely truncate apically (Fig. 2 e); sternite VIII slightly pointed at apex (Fig. 2 f); median lobe of aedeagus with tubus almost straight and apex pointed ventrally in lateral view (Fig. 2 c). FEMALE: tergite VIII truncate apically (Fig. 2 g); sternite VIII rounded apically (Fig. 2 h); spermatheca pipe-shaped, with spherical capsule and long, thin, and slightly sinuate stem, neck weakly sclerotized, and neck to capsule angle variable (Fig. 2 d).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
4AFD9A27A7FE701A1589C9B8CE56DE83.taxon	distribution	Distribution. This native Nearctic species was described from specimens captured in Glacier, British Columbia, later recorder from Yokon, and is herein recorded for the first time from Alberta and New Brunswick (four female specimens tentatively identified as this species) (Map 2). In the United States, this species was previously known from California (Fenyes 1921, Moore and Legner 1975, Klimaszewski and Winchester 2002), and is herein recorded for the first time from Oregon.	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
EA5D8ACEA50F34F91551BF0712C9279C.taxon	diagnosis	Diagnosis. Body length 2.8 - 3.6 mm, sides narrowly subparallel; body colour dark brown to almost black, with antennae bright yellow and tarsi rust-brown to yellowish; integumental microsculpture dense and surface strongly glossy; head round, about the same size as the pronotum, labrum lacking stout spines but with fine setae of unequal length; pronotum small, transverse, angular, slightly narrower than elytra; elytra at suture subequal in length to pronotum; abdomen subparallel; antennal articles 6 - 10 subquadrate to slightly transverse, last article short and broadly oval (Fig. 3 a). MALE: tergite VIII widely truncate apically (Fig. 3 c); sternite VIII slightly pointed at apex (Fig. 3 d); median lobe of aedeagus with tubus almost straight and apex pointed ventrally in lateral view (Fig. 3 b). FEMALE: tergite VIII truncate apically (Fig. 1 f); sternite VIII rounded apically (Fig. 3 g); spermatheca pipe-shaped, with spherical capsule and long and straight stem, neck well sclerotized (Fig. 3 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
EA5D8ACEA50F34F91551BF0712C9279C.taxon	distribution	Distribution. This native Nearctic species is known in Canada from the Northwest Territories and Yukon Territory (Map 2), and from Alaska (Lohse et al. 1990).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
9787AD1130EC0554932C0B6F143B7496.taxon	diagnosis	Diagnosis. Body length 3.0 - 3.4 mm, sides subparallel; body colour dark brown, with tarsi lighter and antennae brown and often with reddish tinge; head round and almost as wide as pronotum or at most as wide as pronotum, equal in size to pronotum; pronotum transverse, angular, about as wide as maximum width of elytra; abdomen subparallel, at base as wide as elytra, widest in apical half; antennal articles 5 - 10 quadrate to slightly transverse (Fig. 4 a). MALE: tergite VIII pointed apically (Fig. 4 c); sternite VIII slightly pointed at apex (Fig. 4 d); median lobe of aedeagus with tubus strongly produced ventrally in lateral view, apex pointed (Fig. 4 b). FEMALE: tergite VIII truncate apically (Fig. 4 f); sternite VIII rounded apically (Fig. 4 g); spermatheca pipe-shaped, with small spherical capsule and long, thin and almost straight stem (Fig. 4 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
9787AD1130EC0554932C0B6F143B7496.taxon	distribution	Distribution. This native Nearctic species is known only from Labrador (Map 3).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
A7056D0E9B22482908D3E0BF2899A539.taxon	diagnosis	Diagnosis. Body dark brown to black, compact, sides subparallel or body narrowly oval in outline (Figs 5 a, 6 a, 7 a), length 2.0 - 3.2 mm; integument with distinct meshed microsculpture and moderately dense punctation and pubescence; head large with mandibles broad and long, left mandible with a small tooth (Figs 5 h, 6 h, 7 h), and right one with a slightly larger tooth at the base of arcuate cutting edge of mandible, apices strongly narrowly elongate [more than in Ocyusa and less than in Gnathusa] (Figs 5 h, i, 6 h, i, 7 h, i); infraorbital carina strong and complete; ligula shallowly split apically (Figs 5 l, 6 l, 7 l); labial palpus with three articles, second article minute, last one needle-shaped (Figs 5 l, 6 l, 7 l), and lacinia and galea as illustrated (Figs 5 k, 6 k, 7 k); labrum narrow and transverse, apical edge entire (Figs 5 j, 6 j, 7 j); frontal suture of head absent; pronotal pubescence along midline directed anteriad or obliquely anteriad in about apical third and posteriad or obliquely posteriad medio-basally; anterior margin of mesosternum without longitudinal carina; mesosternal process triangular basally and then produced and extending from 1 / 3 to almost 2 / 3 length of mesosternal cavities, metasternal process triangular in shape and short; isthmus short to long; median lobe of aedeagus strongly produced ventrally, internal sac structures as illustrated (Figs 5 b, 6 b, 7 b); spermatheca with spherical or tubular capsule narrowed posteriorly into L-shaped neck, invagination narrow; stem narrowly elongate (Figs 5 e, 6 e, 7 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
B5A5DD0F50BC8AB4B4BE3135082072F8.taxon	diagnosis	Diagnosis. Body length 2.0 - 2.3 mm, sides subparallel; body colour dark brown, with tarsi and often tibiae rust-brown, antennae brown; forebody with dense microsculpture, glossy and with moderately dense punctation and pubescence; head round, narrower than pronotum; pronotum transverse, rectangular in shape with sides feebly arcuate, and as wide as elytra; elytra at suture as long as pronotum (Fig. 5 a); abdomen subparallel, narrower than elytra with deep basal impressions on first three visible tergites; antennae with articles V-X strongly transverse, with the outer segments at least twice as wide as long (Fig. 5 a). MALE: male tergite VIII widely truncate apically (Fig. 5 c); sternite VIII slightly produced at apex (Fig. 5 d); median lobe of aedeagus with straight venter of tubus slightly arched laterally and internal sac with band-formed, subapical structure (Fig. 5 b). FEMALE: tergite VIII truncate apically (Fig. 5 f); sternite VIII rounded apically (Fig. 5 g); spermatheca with small spherical capsule with small invagination, short L-shaped neck, and long, thin and broadly curved stem (Fig. 5 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
B5A5DD0F50BC8AB4B4BE3135082072F8.taxon	distribution	Distribution. This native Nearctic species was described from Newfoundland and is herein recorded for the first time from New Brunswick (Map 3).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
F660C9F7D4144843F15B69DF3C0BADF6.taxon	diagnosis	Diagnosis. Body length 2.8 - 3.0 mm, narrowly elongate and broadest at elytra; body dark brown to almost black, sometimes with reddish tinge on elytra, reddish-brown antennae and legs; forebody with dense microsculpture, dense punctation and pubescence, and strongly glossy; head round and narrower than pronotum; pronotum transverse, with sides strongly arcuate and narrowed anteriad, slightly narrower than elytra; elytra at suture about as long as pronotum or slightly longer (Fig. 6 a); abdomen broadly arcuate laterally, slightly narrower than elytra and with basal impressions on first three visible tergites; antennal articles V-X slightly transverse (Fig. 6 a). MALE: male tergite VIII truncate apically (Fig. 6 c); sternite VIII rounded apically and slightly produced medially (Fig. 6 d); median lobe of aedeagus with tubus straight and slightly produced ventrally and with complex structures of internal sac (Fig. 6 b). FEMALE: tergite VIII truncate apically with slightly acute lateral angles (Fig. 6 f); sternite VIII rounded apically and slightly produced apically (Fig. 6 g); spermatheca with narrowly elongate sac-shaped capsule connected with L-shaped neck and narrow and long stem (Fig. 6 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
F660C9F7D4144843F15B69DF3C0BADF6.taxon	distribution	Distribution. This native Nearctic species was recently described from the Yukon Territory (Klimaszewski et al. 2012), and is here newly reported from Nova Scotia, New Brunswick, Quebec, and British Columbia, which constitute new provincial records (Map 6).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
0FB603F29313E156E3934E689B816F6F.taxon	diagnosis	Diagnosis. Body length 2.8 - 3.2 mm, narrowly subparallel with head slightly narrower than pronotum; body colour dark brown, and with tibiae, tarsi and often basal antennal articles reddish-brown; forebody with dense microsculpture, and moderately dense punctation and pubescence, and strongly glossy; head round and slightly narrower than pronotum; pronotum slightly transverse, with sides rounded, and as wide as elytra; elytra at suture about as long as pronotum or slightly longer (Fig. 7 a); abdomen subparallel, as wide as elytra and with basal impressions on first three visible tergites; antennal articles V-X slightly transverse (Fig. 7 a). MALE [description of male is based on poorly preserved specimen and should be consider as tentative]: male tergite VIII truncate apically (Fig. 7 c); sternite VIII rounded apically and slightly produced medially (Fig. 7 d); median lobe of aedeagus with tubus straight and with complex structures of internal sac (Fig. 7 b). FEMALE: tergite VIII truncate apically with sharp lateral angles (Fig. 7 f); sternite VIII rounded apically (Fig. 7 g); spermatheca with narrowly elongate sac-shaped capsule connected with L-shaped neck and narrow and long stem slightly sinuate posteriorly at apex (Fig. 7 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
0FB603F29313E156E3934E689B816F6F.taxon	distribution	Distribution. This native Nearctic species is here described from Nova Scotia, New Brunswick, and Quebec (Map 5).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
0FB603F29313E156E3934E689B816F6F.taxon	etymology	Etymology. This species is named after Odell Park in Fredericton, New Brunswick, where the holotype was found. This park was originally the estate of Reverend Jonathan Odell whom the park was named after. This park was established in 1954.	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
A28EAD4F026BCDE251279B7A5C5AAF35.taxon	diagnosis	Diagnosis. Body dark brown to almost black, compact, sides subparallel or body narrowly oval in outline (Figs 8 a, 9 a), length 2.5 - 3.5 mm; integument with distinct meshed microsculpture and moderate to dense punctation and pubescence; head large with mandibles broad and long, left mandible with a small tooth (Figs 8 h, 9 h), and right one with a slightly larger tooth at the base of arcuate cutting edge of mandible, apices moderately narrowly elongate [less than in Mniusa] (Figs 8 i, 9 i); infraorbital carina strong and complete; ligula shallowly split apically (Figs 8 l, 9 l); labial palpus with three articles, second article minute, last one needle-shaped and lacinia and galea as illustrated (Figs 8 k, 9 k); labrum narrow and transverse, apical edge entire (Figs 8 j, 9 j); frontal suture of head present; pronotal pubescence along midline directed posteriad or obliquely posteriad; anterior margin of mesosternum without longitudinal carina; mesosternal process triangular basally and then produced and extending to about 2 / 3 length of mesosternal cavities, metasternal process narrowly triangular in shape and short; isthmus short; median lobe of aedeagus strongly produced ventrally, internal sac structures as illustrated (Figs 8 b, 9 b); spermatheca S-shaped with spherical capsule, short neck and elongate sinuate stem (Figs 8 e, 9 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
CE09EF65A6E5CBBD9808959E7D2070D7.taxon	diagnosis	Diagnosis. Body length 2.5 - 3.0 mm, narrowly elongate and broadest at elytra; body colour dark brown to almost black, with tarsi, two basal antennal articles and tibiae rust-brown, rest of antennal articles brown; forebody with dense microsculpture, moderate punctation and pubescence, and strongly glossy; head round and narrower than pronotum; pronotum transverse, rectangular in shape with sides strongly arcuate, and narrower than elytra; elytra at suture about as long as pronotum (Fig. 8 a); abdomen broadly arcuate laterally, slightly narrower than elytra and with basal impressions on first three visible tergites; antennae with articles V-X subquadrate to slightly elongate (Fig. 8 a). MALE: male tergite VIII broadly rounded apically (Fig. 8 c); sternite VIII rounded apically (Fig. 8 d); median lobe of aedeagus with tubus strongly bent ventrally and with pronounced structures of internal sac (Fig. 8 b). FEMALE: tergite VIII truncate apically (Fig. 8 f); sternite VIII rounded apically (Fig. 8 g); spermatheca with semi-spherical capsule with long invagination, and S-shaped broad stem (Fig. 8 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
CE09EF65A6E5CBBD9808959E7D2070D7.taxon	distribution	Distribution. This native Nearctic species is known from Alaska, Yukon Territory and Ontario (Brunke et al. 2012), and is here newly reported from the island of Newfoundland and New Brunswick [new provincial records] (Map 4).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
0579CE7AC747EFE6B27729AF21563CA0.taxon	diagnosis	Diagnosis. Body length 2.8 - 3.0 mm, sides subparallel; body colour dark brown, with tarsi, two basal antennal articles and legs rust-brown, rest of antennal articles dark brown; forebody with moderately dense microsculpture, punctation and pubescence, and strongly glossy; head round and about as wide as pronotum; pronotum transverse, with sides strongly arcuate, widest in apical third, and as wide as elytra; elytra at suture much shorter than pronotum (Fig. 9 a); abdomen broadly arcuate laterally, slightly broader than elytra at middle and with basal impressions on first three visible tergites; antennae with articles V-X subquadrate (Fig. 9 a). MALE: male tergite VIII with apical margin slightly pointed medially (Fig. 9 c); sternite VIII rounded apically (Fig. 9 d); median lobe of aedeagus with tubus convex basally and then strongly bent ventrally and with complex structures of the internal sac (Fig. 9 b). FEMALE: tergite VIII truncate apically with small projections laterally (Fig. 9 f); sternite VIII rounded apically (Fig. 9 g); spermatheca with small spherical capsule with long and broad invagination, and S-shaped broad stem slightly swollen posteriorly (Fig. 9 e).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
0579CE7AC747EFE6B27729AF21563CA0.taxon	distribution	Distribution. This native Nearctic species was described from Rhode Island by Casey 1894 [often cited as 1893]. It was recorded also from New Brunswick in Canada (Map 5) and from Iowa and Massachusetts in the United States (Casey 1894, Bernhauer 1906 [as brevipennis], Moore and Legner 1975, Webster et al. 2009).	en	Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R., Godin, Benoit (2014): Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412: 9-40, DOI: http://dx.doi.org/10.3897/zookeys.412.7282, URL: http://dx.doi.org/10.3897/zookeys.412.7282
