species (Herman, 2001)

Majka, Christopher, Klimaszewski, Jan & Lauff, Randolph, 2008, The coastal rove beetles (Coleoptera, Staphylinidae) of Atlantic Canada: a survey and new records, ZooKeys 2 (2), pp. 115-150 : 117-120

publication ID

https://doi.org/ 10.3897/zookeys.2.2

DOI

https://doi.org/10.5281/zenodo.3793044

persistent identifier

https://treatment.plazi.org/id/03848788-467F-6639-4BD9-989BFBC6D2FA

treatment provided by

Plazi

scientific name

species
status

 

Key to species View in CoL

The following key to the species of coastal Staphylinidae of Atlantic Canada is provided. It is modified and adapted from Newton et al. (2000), Downie and Arnett (1996), Smetana (1995), and Herman (1972, 1976, 1986) together with additional material.

1 Antennae inserted anterior to a line drawn between the anterior margins of the eyes ...................................................................................................... 2

– Antennae inserted posterior to a line drawn between the anterior margins of the eyes .................................................................................................... 24

2(1) Head with deep conical foveae on the vertex ( Pselaphinae View in CoL )........................... ................................................................................ Brachygluta abdominalis View in CoL

– Head without deep conical foveae on the vertex......................................... 3

3(2) Head with a pair of ocelli between the posterior margins of the eyes ( Omaliinae View in CoL ) .......................................................................... Micralymma marinum View in CoL

– Head without ocelli ................................................................................... 4

4(3) Abdomen with seven visible abdominal sterna ( Oxytelinae View in CoL )....................... 5

– Abdomen with six visible abdominal sterna................................................ 9

5(4) Labrum entire medially.............................................................................. 6

– Labrum divided medially ........................................................................... 8

6(5) Basal third of lateral pronotal margin markedly sinuate.............................. 7

– Basal third of lateral pronotal margin straight or evenly curved to base ........ ............................................................................................... Bledius basalis View in CoL

7(6) Ratio of elytral length/pronotal length (at midline) 1.58-1.76; elytra brownish-black with sub-scutellar yellowish spot ........................... Bledius opaculus View in CoL

– Ratio of elytral length/pronotal length (at midline) 1.33-1.50; elytra yellowish with black sutural and basal stripes ................................. Bledius neglectus View in CoL

8(5) Epipleural ridge of elytron present only on apex............ Bledius mandibularis View in CoL

– Epipleural ridge of elytron present along entire length ............ Bledius politus View in CoL

9(4) Head constricted behind eyes so as to form a distinct neck visible from above ................................................................................................................ 10

– Head not constricted behind eyes, no neck visible ( Tachyporinae View in CoL ) ............... .................................................................................. Sepedophilus marshami View in CoL

10(9) Inter-segmental membranes of abdomen with a distinct rectangular “brick wall” pattern; pronotum with large post-coxal process ( Paederinae View in CoL ) ............................................................................... Ochthephilum fracticorne View in CoL

– Inter-segmental membranes of abdomen various (rounded or triangular patterns, or pattern indistinct) but never with a “brick wall” pattern; pronotum without postcoxal process ( Staphylininae View in CoL )................................................ 11

11(10) Strongly sclerotized plate (single, or divided medially into two contiguous sclerites) in front of prosternum present ( Xantholinini View in CoL ) ........................... 12

– Strongly sclerotized plate in front of prosternum absent........................... 13

12(11) Metatibia with apical and sub-apical ctenidia, the latter interrupted medially but extended proximally along outer margin of metatibia ............................ ................................................................................... Gyrohypnus angustatus View in CoL

– Metatibia with apical ctenidium only.............................. Xantholinus linearis View in CoL

13(11) Disc of pronotum either densely punctate or glabrous; ligula notched ( Staphylinina View in CoL ) ................................................................................................ 14

– Disc of prontotum generally with two rows of punctures medially; ligula entire, rounded or slightly sinuate apically ( Philonthina View in CoL ) ......................... 15

14(13) Disc of pronotum glabrous; white pubescence on the anterior angles of the pronotum, across the medial part of the elytra, and on abdominal tergites four and five ..................................................... Creophilus maxillosus villosus View in CoL

– Disc of pronotum densely punctate; lacking white pubescence ............. ................................................................................................... Tasgius ater View in CoL

15(13) Largest lateral macrosetal puncture of pronotum separated from the lateral margin by at most little more than the width of the puncture .................. 16

– Largest lateral macrosetal puncture of pronotum separated from the lateral margin by at least three times the width of the puncture ....... Cafius bistriatus View in CoL

16(15) Protarsus with basal four tarsomeres more or less dilated, each tarsus bearing modified pale setae on ventral surface in addition to regular marginal setae......................................................................................................... 17

– Protarsus with basal four tarsomeres not dilated, each tarsus bearing only regular marginal setae........................................................ Gabrius astutoides View in CoL

17(16) Dorsal rows on pronotum each with four punctures ................................ 18

– Dorsal rows on pronotum each with five punctures or more .................... 23

18(17) Lateral margins of pronotum at least slightly sinuate posteriorly in front of basal margin............................................................................................. 19

– Lateral margins of pronotum evenly arcuate to parallel posteriorly in front of basal margin............................................................................................. 21

19(18) Posterior basal line on visible abdominal tergites two and three acutely extended posteriad at middle................................................. Philonthus politus View in CoL

– Posterior basal line on visible abdominal tergites two and three not acutely extended posteriad at middle ................................................................... 20

20(19) Small species (6.8-7.8 mm); eyes large; pronotum iridescent........................ ....................................................................... Philonthus umbratilis View in CoL (in part)

– Large species (8.7 – 13.6 mm); eyes moderately large, pronotum not iridescent.................................................................................... Philonthus furvus View in CoL

21(17) First antennal article bicolored, dark with underside yellow ......................... ....................................................................................... Philonthus cognatus View in CoL

– First antennal article unicolored, dark ...................................................... 22

22(21) Surface of pronotum iridescent ....................... Philonthus umbratilis View in CoL (in part)

– Surface of pronotum not iridescent............................ Philonthus carbonarius View in CoL

23(17) Dorsal rows on pronotum each with five punctures........... Philonthus varians View in CoL

– Dorsal rows on pronotum each with six punctures......... Philonthus couleensis View in CoL

24(1) Hind coxae separated, small; eyes bulbous covering side of head ( Steninae View in CoL ) ........................................................................................... Stenus erythropus View in CoL

– Hind coxae contiguous, large; eyes various but not bulbous and covering side of head ( Aleocharinae View in CoL ) ............................................................................. 25

25(24) Tarsal formula 5-5-5; maxillary and labial palps each with an apical pseudosegment ( Aleocharini View in CoL ) .................................................... Aleochara litoralis View in CoL

Tarsal formula otherwise; maxillary and labial palps without apical pseudosegments .............................................................................................. 26

26(25) Tarsal formula 4-4-4 ( Hypocyphtini View in CoL ) ....................................... Oligota parva View in CoL

– Tarsal formula 4-5-5 ................................................................................ 27

27 (26) Pronotum broadest subapically, narrowed behind to a base not more than 3/4 of the maximal width of the pronotum ( Falagriini View in CoL ) .................................. 28

– Pronotal base more than 3/4 of the maximal width of the pronotum ( Athetini View in CoL ) ................................................................................................ 29

28(27) Scutellum bicarinate ............................................................ Falagria dissecta View in CoL

– Scutellum not bicarinate ................................................... Myrmecopora vaga View in CoL

29(27) Pronotal hypomeron not at all visible in lateral view ................................ 30

Pronotal hypomeron narrowly to moderately visible in lateral view.......... 32

30(29) Body robust, narrowly oval; antennal articles 4-6 slightly elongate and 7-10 quadrate to slightly transverse ................................................... Mocyta fungi View in CoL

– Body fine, subparallel; antennal articles 4-6 quadrate to transverse and 7-10 moderately to strongly transverse ............................................................. 31

31(30) Body glossy; abdominal tergites sparsely to moderately densely punctuate; tergite eight of both sexes with antecostal suture (basal line) subparallel to the base of the disc......................................................................... Acrotona avia View in CoL

– Body moderately glossy, appearing somewhat opaque and velvety; abdominal tergites densely punctuate; tergite eight of both sexes with antecostal suture (basal line) arcuate and joining base of the disc before reaching its margin and then reaching downwards toward the apical margin of disc ...... ........................................................................................... Strigota ambigua View in CoL

32(29) Pronotum with setae in midline directed anteriorly; pronotum with asperate punctation ....................................................... Atheta (Datomicra) acadiensis View in CoL

– Pronotum with all setae directed posteriorly or posterolaterally; pronotum without asperate punctation..................................................................... 33

33(32) Body opaque; pronotum at mid-length almost as broad as elytra at base; abdomen subparallel and distinctly narrower than elytra along its entire length; apical margin of male tergite 8 with 2 small lateral dents and shallow medial emargination pointed medially......................................... Atheta novaescotiae View in CoL

– Body glossy; pronotum at mid-length distinctly narrower than elytra at base; abdomen with sides arcuate, broadest in mid-length and about as broad as elytra; apical margin of male tergite 8 truncate and without any dents ......... ........................................................................... Atheta (Thinobaena) vestita View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

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