Gnathusa

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Klimaszewski J, Webster R, Langor D, Bourdon C, Hammond H, Pohl G, Godin B (2014) Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae). ZooKeys 412 : 9–40, doi. Versioned wiki page: 2014-05-30, version 52295, https://species-id.net/w/index.php?title=Gnathusa&oldid=52295 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Klimaszewski2014ZooKeys412,
author = {Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H.E. James, Pohl, Greg R. AND Godin, Benoit},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae)},
year = {2014},
volume = {412},
issue = {},
pages = {9--40},
doi = {10.3897/zookeys.412.7282},
url = {http://www.pensoft.net/journals/zookeys/article/7282/abstract},
note = {Versioned wiki page: 2014-05-30, version 52295, https://species-id.net/w/index.php?title=Gnathusa&oldid=52295 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae)
A1 - Klimaszewski J, Webster R, Langor D, Bourdon C, Hammond H, Pohl G
A1 - Godin B
Y1 - 2014
JF - ZooKeys
JA -
VL - 412
IS -
UR - http://dx.doi.org/10.3897/zookeys.412.7282
SP - 9
EP - 40
PB - Pensoft Publishers
M1 - Versioned wiki page: 2014-05-30, version 52295, https://species-id.net/w/index.php?title=Gnathusa&oldid=52295 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.412.7282

Wikipedia/ Citizendium:

<ref name="Klimaszewski2014ZooKeys412">{{Citation
| author = Klimaszewski J, Webster R, Langor D, Bourdon C, Hammond H, Pohl G, Godin B
| title = Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae)
| journal = ZooKeys
| year = 2014
| volume = 412
| issue =
| pages = 9--40
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.412.7282
| url = http://www.pensoft.net/journals/zookeys/article/7282/abstract
| pmc =
| accessdate = 2024-12-12

}} Versioned wiki page: 2014-05-30, version 52295, https://species-id.net/w/index.php?title=Gnathusa&oldid=52295 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Coleoptera
Familia: Staphylinidae

Name

Gnathusa Fenyes – Wikispecies link – Pensoft Profile

Diagnosis

Body dark brown to black, compact and robust, subparallel (Figs 1a, 2a, b, 3a, 4a), 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 1h, i, 2i, j, 3h, i, 4h, i); infraorbital carina strong and complete; ligula more or less deeply bilobed (Figs 1l, 2m, 3l, 4l); last article of maxillary palpus needle-shaped (Figs 1k, 2l, 3k, 4k); 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 ¾ 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 1b, 2c, 3b, 4b), paramere with narrowly elongate apical lobe bearing four macrosetae; spermatheca pipe-shaped with spherical or tubular capsule and elongate narrow stem (Figs 1e, 2d, 3e, 4e).

Key to Canadian species of Gnathusa

New provincial and territorial records are indicated in boldface font.

Key to Canadian species of Gnathusa — J. Klimaszewski, R. Webster, D. Langor, C. Bourdon, H. Hammond, G. Pohl , B. Godin
1
Labrum with coarse spines (Fig. 1j); antennal articles 7–10 strongly transverse (Fig. 1a); body length 3.5–4.0 mm; integument moderately glossy; genitalic structures as illustrated (Fig. 1b, e) 
  Gnathusa eva Fenyes [AB, BC, CA, YT]
–
Labrum with fine setae (Figs 2k, 3j, 4j); antennal articles 7-10 subquadrate or slightly transverse (Figs 2a, b, 3a, 4a); body length 2.5–3.7 mm; integument usually more glossy; genital structures differently shaped (Figs 2c, d, 3b, e, 4b, e) 
  2
2 (1)
Antennal articles 5–10 subquadrate (Fig. 2a, b); genitalia as illustrated (Figs 2c, d); body length 2.5–3.7 mm 
  Gnathusa tenuicornis Fenyes [AB, AK, BC, YT, OR, NB]
–
Antennal articles 5–10 slightly transverse (Figs 3a, 4a); genitalia differently shaped (Figs 3b, e, 4b, e); body length 2.8–3.6 mm 
  3
3 (2)
Head slightly narrower and smaller than pronotum in dorsal view (Fig. 4a); antennae brown or yellowish-brown; basal part of abdominal tergite III deeply impressed and moderately coarsely-densely punctate; genitalia as illustrated (Fig. 4b, e) 
  Gnathusa alfacaribou Klimaszewski & Langor [NF, LB]
–
Head about as wide and large as pronotum in dorsal view (Fig. 3a); antennae light yellow; basal part of abdominal tergite III deeply impressed and coarsely-densely punctate; genitalia as illustrated (Figs 3b, e; Figs 45–47, in Lohse et al. 1990[2]) 
  Gnathusa caribou Lohse [YT, NWT, AK]

Taxon Treatment

  • Klimaszewski, J; Webster, R; Langor, D; Bourdon, C; Hammond, H; Pohl, G; Godin, B; 2014: Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae) ZooKeys, 412: 9-40. doi

Other References

  1. ↑ Fenyes A (1909) Two new species of Aleocharinae from California. Proceedings of the Entomological Society of Washington 11: 197–199.
  2. ↑ Lohse G, Klimaszewski J, Smetana A (1990) Revision of Arctic Aleocharinae of North America (Coleoptera: Staphylinidae). The Coleopterists Bulletin 44: 121–202.

Images

Figure 1. Gnathusa eva Fenyes: 1a habitus 1b median lobe of aedeagus in lateral view 1c male tergite VIII 1d male sternite VIII 1e spermatheca in lateral view 1f female tergite VIII 1g female sternite VIII 1h left mandible 1i right mandible 1j labrum 1k maxilla 1l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm.
Figure 1. Gnathusa eva Fenyes: 1a habitus 1b median lobe of aedeagus in lateral view 1c male tergite VIII 1d male sternite VIII 1e spermatheca in lateral view 1f female tergite VIII 1g female sternite VIII 1h left mandible 1i right mandible 1j labrum 1k maxilla 1l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm. 
Figure 2. Gnathusa tenuicornis Fenyes: 2a habitus, based on female from New Brunswick 2b habitus based on male from Alberta 2c median lobe of aedeagus in lateral view 2d spermatheca in lateral view 2e male tergite VIII 2f male sternite VIII 2g female tergite VIII 2h female sternite VIII 2i left mandible 2j right mandible 2k labrum 2l maxilla 2m menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm.
Figure 2. Gnathusa tenuicornis Fenyes: 2a habitus, based on female from New Brunswick 2b habitus based on male from Alberta 2c median lobe of aedeagus in lateral view 2d spermatheca in lateral view 2e male tergite VIII 2f male sternite VIII 2g female tergite VIII 2h female sternite VIII 2i left mandible 2j right mandible 2k labrum 2l maxilla 2m menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm. 
Figure 3. Gnathusa caribou Lohse: 3a habitus 3b median lobe of aedeagus in lateral view 3c male tergite VIII 3d male sternite VIII 3e spermatheca in lateral view 3f female tergite VIII 3g female sternite VIII 3h left mandible 3i right mandible 3j labrum 3k maxilla 3l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm.
Figure 3. Gnathusa caribou Lohse: 3a habitus 3b median lobe of aedeagus in lateral view 3c male tergite VIII 3d male sternite VIII 3e spermatheca in lateral view 3f female tergite VIII 3g female sternite VIII 3h left mandible 3i right mandible 3j labrum 3k maxilla 3l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm. 
Figure 4. Gnathusa alfacaribou Klimaszewski and Langor: 4a habitus 4b median lobe of aedeagus in lateral view, partially reconstructed below broken line in Fig. 4b, and above broken line in Fig. 4c, 4d; based on the holotype 4c male tergite VIII partially reconstructed above broken line, based on the holotype 4d male sternite VIII partially reconstructed above broken line, based on the holotype 4e spermatheca in lateral view 4f female tergite VIII 4g female sternite VIII 4h left mandible 4i right mandible 4j labrum 4k maxilla 4l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm.
Figure 4. Gnathusa alfacaribou Klimaszewski and Langor: 4a habitus 4b median lobe of aedeagus in lateral view, partially reconstructed below broken line in Fig. 4b, and above broken line in Fig. 4c, 4d; based on the holotype 4c male tergite VIII partially reconstructed above broken line, based on the holotype 4d male sternite VIII partially reconstructed above broken line, based on the holotype 4e spermatheca in lateral view 4f female tergite VIII 4g female sternite VIII 4h left mandible 4i right mandible 4j labrum 4k maxilla 4l menthum, labial palpi and ligula. Habitus scale bar = 1.0 mm; other scale bars = 0.2 mm. 
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