Cercopeus

O’Brien, Charles W., Ciegler, Janet C. & Girón, Jennifer C., 2010, Weevils of the genus Cercopeus Schoenherr from South Carolina, USA (Coleoptera: Curculionidae: Entiminae), Insecta Mundi 2010 (141), pp. 1-29 : 3-5

publication ID

https://doi.org/ 10.5281/zenodo.5165029

persistent identifier

https://treatment.plazi.org/id/03F387D5-4C2A-FF8A-4AE7-3A2DCEBAFD7D

treatment provided by

Felipe

scientific name

Cercopeus
status

 

Key to known females of Cercopeus View in CoL

1. Foretibia with small anteapical spine on outer margin ( Fig. 20 View Figure 16-23 ); sides of pronotum evenly rounded ................................................................................................................................................... 2

– Foretibia without anteapical spine on outer margin; sides of pronotum various ....................... 4

2(1). Head in lateral view with tumidity above antennal insertion and above vertex, concave between tumidities; eyes placed more dorsally than usual, in lateral view close to dorsal margin (Fig. 27); length 3.2 mm; VA ............................................................................... C. simius Sleeper

– Head in lateral view with dorsal edge straight or evenly curved; eye placement normal; widespread in eastern U.S.......................................................................................................................... 3

3(2). Pronotum striolate, slightly tumid; larger, length 3.7-5.1 mm ............. C. strigicollis Sleeper View in CoL

– Pronotum punctate, at most with weakly developed strioles, not tumid; usually smaller, length 3.3-4.3 mm .......................................................................................... C. chrysorrhoeus (Say) View in CoL

4(1). Foretibia with outer apical margin markedly produced and acutely angulate ( Fig. 21 View Figure 16-23 ), inner margin denticulate; length 3.9-4.9 mm ................................................................................... 5

– Foretibia with outer apical margin rounded or rectilinear, not or slightly produced ( Fig. 22 View Figure 16-23 ); inner margin and length various ....................................................................................................... 6

5(4). Reddish brown; pronotum distinctly tumid in middle ...................... C. maspavancus Sleeper View in CoL

– Dark brown; pronotum not tumid ................................................................... C. cornelli View in CoL n. sp.

6(4). Pronotum with median carina or spine at middle of basal margin, many specimens with median longitudinal glabrous ridge or carina (Fig. 24); pronotum not markedly striolate ................. 7

– Pronotum simple, without median spine, glabrous ridge, or carina; pronotum striolate or not ... ................................................................................................................................................ 10

7(6). Foretibia markedly curved, inner apical margin produced; length 3.6 mm; AR, IL, MI .............. ................................................................................................................ C. schwarzi Sleeper

– Foretibia straight, inner apical margin rounded ........................................................................ 8

8(7). Pronotal carina prominent at base and in apical third; elytral striae deeply impressed; length 2.9 mm; TX .............................................................................................................. C. bolli Burke

– Pronotal carina or spine restricted to basal fifth or barely evident; elytral striae shallowly or not impressed; SC ........................................................................................................................... 9

9(8). Pronotal carina prominent basally, short but noticeably extended onto pronotal disc; lateral margins of pronotum narrowly rounded (Fig. 26) ........................................................... C. alexi View in CoL n. sp.

– Pronotal carina tiny, blunt basal spine not extended onto pronotal disc; lateral margins of pronotum broadly rounded .............................................................................. C. skelleyi View in CoL n. sp. (in part)

10(6). Pronotum with disc markedly striate, individual punctures nearly effaced ............................ 11

– Pronotum with punctures apparent, some elongate and in part confluent, striolae present or not ................................................................................................................................................ 13

11(10). Smaller, length 3.0- 3.6 mm; elytral strial punctures very small; proepipleuron punctate; midwestern U.S. (AR, OK) ......................................................................... C. clispus Sleeper

– Larger, length 3.6-5.0 mm; elytral strial punctures near basal fourth as wide as intervals; proepipleuron striate; southeastern U.S................................................................................ 12

12(11). Foretibia with outer apical margin triangularly produced, apex straight ( Fig. 22 View Figure 16-23 ), without ventral process ....................................................................................................... C. femoratus View in CoL n. sp.

– Foretibia with outer apical margin and apex rounded, with ventral process apparent in lateral view ( Fig. 23 View Figure 16-23 ) ................................................................................................. C. tibialis View in CoL n. sp.

13(10). Pronotum substriate, punctures and striae both apparent ...................................................... 14

– Pronotum punctate, completely without striae ......................................................................... 15

14(13). Base of pronotum with small median spine; length 3.5-4.3 mm; SC ............................................. ........................................................................................................ C. skelleyi View in CoL n. sp. (in part) – Base of pronotum uniformly rounded, without spine; length 2.7-3.0 mm; north FL, south GA ... ............................................................................................................. C. komarecki O’Brien

15(13). Pronotum markedly constricted apically, subquadrate with subparallel sides; elytra scale pattern formed with black and white rectangular maculae surrounding median discal area; length 2.3- 2.7 mm ...................................................................................................... C. isquitus Sleeper

– Pronotum at most somewhat constricted apically, sides distinctly rounded; elytral pattern various but not with quadrate maculae; length 2.0- 3.5 mm .............................................................. 16

16(15). Pronotum and elytra with moderately dense, fine, erect setae; midwestern U.S.................... 17

– Pronotum and elytra with dense, coarse, erect, bristle like setae; southeastern U.S. (SC) .......... ........................................................................................................................ C. paulus View in CoL n. sp.

17(16). Pronotum slightly wider than long, very finely, closely, deeply punctate, intervals between punctures raised, giving granular appearance; length 2.0-3.0 mm; AR, IA, IL, IN, MO, OH ................... ................................................................................................................. C. chisaius Sleeper

– Pronotum slightly longer than wide, very coarsely, closely punctate surface not granular in appearance; length 3.0- 3.5 mm; IN, OH, WI .......................................... C. confusor Sleeper

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

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