Euaesthetus GRAVENHORST
Creators: name: Puthz, V.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Euaesthetus

description: Key to the North American species of the genus Euaesthetus GRAVENHORST
1 Eyes smaller, temples at least one third as long as eyes; shoulders oblique........................2
- Eyes larger, temples very short, indistinct; shoulders rectangular......................................3
2 Pronotum with two narrow longitudinal impressions, sculpture of elytra granulose, sides carinate.: E (fig. 87). 1.4-1.7mm (FB 0.8mm) ........................ scabripennis nov.sp. AR
- Pronotum without narrow longitudinal impressions; elytra punctate, sides simple.: E (fig. 88). 1.5mm (GB 0.8mm) ............................................................. brachypterus nov.sp. NC
3 Elytra impunctate (fig. 7).: E (fig. 38). 1.1-1.3mm (FB 0.7-0.8mm) ......... atomus CASEY FL
- Elytra punctate....................................................................................................................4
4 Interstices of abdominal punctation smooth. Head (mostly) broader than pronotum. Elytra bicolorous.: E (fig. 37). 1.4-1.6mm (FB 0.8-0.9mm) ............... bicoloratus CASEY LA, GA, FL
- Interstices of abdominal punctation finely sculptured.........................................................5
5 Head broader, nearly as broad or as broad as pronotum (HW: PW>0.97).........................6
- Head less broad (HW: PW d0.97).......................................................................................8
6 Larger and less narrow, FB 0.9mm. Frons matt, punctation very dense, interstices much smaller than half diameter of punctures.: Unknown.: S8 (fig. 76). 1.7- 1.8mm (FB 0.9mm).................................................................................... punctatus CASEY VA, FL
- Smaller and narrower, FB 0.7mm. Frons moderately shiny, less densely punctate, interstices smaller than half diameter of punctures, but distinctly shiny. Two very similar species.....................................................................................................................7
7: Apical notch of sternite 8 deeper than one third of the length of sternite. E (fig. 29). 1.1-1.3mm (FB 0.7mm) ................................................................................. floridae CASEY NS, NB. - TX, LA, MS, AL, MA, RI, SC, GA, FL
-: Apical notch of sternite 8 less deep, about as long as one third of sternite, E (fig. 30). 1.1-1.4mm (FB 0.7mm) ............................................................................ franki PUTHZ GA, FL
8 Elytra at least posteromedially iridescent............................................................................9
- Elytra not iridescent..........................................................................................................21
9 Pronotum with narrow longitudinal impressions in posterior third...................................10 Few species are keyed out here and in the opposite colums because of the variability
- Pronotum without (distinct) longitudinal impressions in posterior third...........................14
10 Elytra uniformely punctate.: E (figs. 12, 13, 21-23).: S 8 (about as in fig. 79) 1.1- 1.4mm (FB 0.7-0.8mm)............................................................................... iripennis CASEY ON, PQ, NS. - ID, KS, OK,TX, AR, LA, MS, AL, MO, MN, WI, MI, IL, IN, OH, NH, MA, RI, NY, N J, MD, DC, KY, VA, NC, SC, TN, GA, FL
- Punctation of elytra becoming shallower in posteromedian area......................................11
11 Elytra broader (EW: EL t1.35).: E (fig. 45).: S8 (fig. 70) 1.5-2.0mm (FB 0.8- 0.9mm) ........................................................................................................ smetanai PUTHZ TX
- Elytra less broad (EW: EL <1.35).....................................................................................12
12 Longitudinal impressions of pronotum clearcut and distinct.: E (fig. x).: Unknown. 1.4-1.6mm (FB 0.8-0.9mm ........................................................... caseyi nov.sp. TX
- Longitudinal impressions of pronotum weak to obsolete..................................................13
13: E (fig. 32).: S8 (figs 66, 67). 1.4-1.9mm (FB 0.8-1.0mm)........................................... ...........................................................................................[americanus ERICHSON] see #15
-: E (fig. 33).: S8 (fig. 68). 1.4-1.6mm (FB 0.8-0.9mm)................................................. ...................................................................................[pugetensis HATCH] see couplet #15x
14 E (fig. 43), parameres bifid apically.: S8 (fig. 69). 1.4-1.6mm (FB 0.8-0.9mm) .............. ........................................................................................................................ similis CASEY ON. -NM, AZ, NE, KS, OK, TX, AR, LA, MS, AL, WI, IL, IN, NH, PA, MD, WV, NC, TN, GA, FL.- Mexico
-: E (figs 32, 33, 36), parameres simple apically.............................................................15
15: E (fig. 32, 33, 36), median lobe distinctly longer than parameres...............................16
-: E (fig. 41), median lobe shorter than or as long as parameres.....................................18
16: E (fig. 36), apex of median lobe rounded.: S8 (fig. 73). 1.2-1.5mm (FB 0.7- 0.8mm) ......................................................................................................... chantali PUTHZ ON, PQ, NB. -TX, IA, NH.- Cuba
-. E (figs 32, 33), apex of median lobe pointed...............................................................17
17: E (fig. 32). S8 (fig. x). 1.4-1.9mm (FB 0.8-1.0mm). Habitus (fig. 3)........................... .......................................................................................................... americanus ERICHSON AK, NT, BC, AB, MB, ON, PQ, NB. - AK, UT, TX, AR, LA, MS, AL, IA, MN, WI, MI, IL, IN, OH, NH, MA, RI, NY, NJ, PA, DC, KY, VA, NC, FL,
-: E (fig. 33).: S8 (fig. x). 1.4-1.6mm (FB 0.8-0.9mm)...................... pugetensis HATCH BC, ON, PQ, NS, NF. - WA, AR, MS, MI, IL, IN, ME, MA, NY, NJ, NC, SC, GA, FL.- Cuba
18: E (fig. 41), median lobe very broad apically, parameres with 3 apical setae.: S8 (fig. 72). 1.4-1.6mm (FB 0.8mm)................................................................ websteri nov.sp. NB, PQ
- E otherwise, parameres with 2 apical setae.......................................................................19
19: E (fig. 39), parameres broader, apical setae long and strong.: S8 (fig. 82). 1.3- 1.8mm (FB 0.8-0.9mm).............................................................................. mundulus CASEY ON, PQ. - TX, LA, MS, AL, WI, IN, ME, NH, IL, MA, RI, CT, NY, NJ, DC, NC, SC, GA, FL
-: E (fig. 46), parameres narrower, apical setae very short.: S8 (fig. 74)....................20
20: E (fig. 46, median lobe broader. Apical excision of S8 less deep.: S8 (as in fig. 74). 1.3-1.5mm (FB 0.7-0.8mm) ................................................... ganglbaueri BERNHAUER MS, MI
-: E (fig. 47), median lobe less broad. Apical excision of S8 deeper.: S8 (fig. 74). 1.4-1.7mm (FB 0.8-1.0mm). Habitus (fig. 4) .................................................... ganglbaueri A, ON, PQ, NB.- MN, OH, NH, NY, NJ
21 Elytra in relation to pronotum longer (PL: EL d0.90).......................................................22
- Elytra in relation to pronotum less long (PL: EL>0.95)...................................................26
22 Pronotum with narrow longitudinal impressions in posterior third...................................23
- Pronotum without longitudinal impressions in posterior third.: E (fig. 42).: S8:?. 1.3-1.5mm (FB 0.8-0.9mm) ................................................................... marionensis CASEY MA, RI, NY, NJ
23 Elytra broader (EW: EL <1.30).........................................................................................24
- Elytra less broad (EW: EL>1.30).....................................................................................25
24 Elytra in relation to head broader (EW: HW>1.35; fig. 9)....[iripennis CASEY] see #8
- Elytra in relation to head less broad (EW: HW <1.35. fig. 8).: E (figs 11, 15-20).: S8 (as in fig. 79). 1.4-2.0mm (FB 0.7-0.9mm)........................... laeviusculus MANNERHEIM YK, NT, AB, SK, MB, ON, PQ, NS. - AL, CO, MT, UT, IA, ME, NH, NY.- Europe, Siberia
25 Reddish brown.: E (fig. 44).: S8 (fig. 80). 1.5-1.8mm (FB 0.9mm). Habitus (fig. 5) ................................................................................................................. hermani nov.sp. NB.-WV
- Dark castaneous.: E (fig. 34).: S8 (fig. 84). 1.4-2.1mm (FB 0.8-0.9mm)..................... ..................................................................................................................... albertae PUTHZ AB, ON, PQ, NB. - AL, ID, KS, MS, IA, WI, MI, IL, ME, NH, NY, SC
26: E: median lobe much longer than parameres...............................................................27
-: E: median lobe as long as or slightly longer than parameres.......................................28
27: E (fig. 31, parameres spoonline broadened apically.: S8 (fig. 75). 1.3-1.5mm (FB 0.7-0.8mm). Habitus (fig. 2) ......................................................................... pacificus FALL BC, PQ. - AL, WA
-: E (fig. 35), parameres slender apically.: S8 (fig. 71). 1.3-1.8mm (FB 0.8-0.9mm)..... ................................................................................................................... chandleri PUTHZ NH
28: E (fig. 27).: S8:?. 1.2-1.5mm (FB 0.7- 0.8mm) ............................ blanchardi nov.sp. MA
-: E (fig. 28.: S8 (fig. 86). 1.3-1.6mm (FB 0.7- 0.8mm) ..................... wickhami nov.sp. TX, IA
-: E (fig. 26).: S8 (fig. 78). 1.2-1.5mm (FB 0.7- 0.9mm). Habitus (fig. 6)...................... ........................................................................................................................ dybasi PUTHZ ON, PQ. - WI, MI, IL, IN, NH, NY
-: E (fig. 24, 25).: S8 (figs 79, 83). 1.1-1.6mm (FB 0.6- 0.8mm).............. suteri nov.sp. WI
description: Published as part of Puthz, V., 2014, Nordamerikanische Arten der Gattung Euaesthetus GRAVENHORST (Coleoptera, Staphylinidae) 115. Beitrag zur Kenntnis der Euaesthetinen, pp. 845-876 in Linzer biologische Beiträge 46 (1) on pages 867-869, DOI: 10.5281/zenodo.5306859