genera

Monné, Miguel A., Santos-Silva, Antonio & Monné, Marcela L., 2020, Key to Mexican and Central American genera of Acanthocinini (Coleoptera Cerambycidae, Lamiinae) with erect setae on elytral surface, excluding the Caribbean Islands, Zootaxa 4885 (1), pp. 1-26 : 2-4

Key to genera

1. Antennomere IV with dense tuft of setae ( Fig. 9 )....................................... Cosmotoma Chevrolat, 1843

– Antennomere IV lacking dense tuft of setae................................................................ 2

2(1). Scape with apical process ( Fig. 7 )..................................................... Canidia Thomson, 1857

– Scape lacking apical process….......................................................................... 3

3(2). Elytra with abundant small tubercles basally ( Fig. 45 )................................... .. Catharesthes Bates, 1881

– Elytra lacking abundant small tubercles basally............................................................. 4

4(3). Elytra with distinct centrobasal crest...................................................................... 5

– Elytra without distinct centrobasal crest, at most gibbose on this area........................................... 18

5(4). Femora with abundant long erect setae ( Fig. 37 )........................................... Trichalphus Bates, 1881

– Femora lacking abundant long erect setae.................................................................. 6

6(5). Elytra with at least some erect setae longer than three times the pedicel length..................................... 7

– Elytra lacking erect setae longer than three times the pedicel length.............................................. 9

7(6). Lateral tubercles of the prothorax placed about middle ( Fig. 16 )....................... Leptocometes Bates, 1881 (part)

– Lateral tubercles of the prothorax placed in posterior third..................................................... 8

8(7). Elytra with outer apex spiniform ( Figs. 40–42 )................................... Trichotithonus Monné, 1990 (part)

– Elytra with outer apex not spiniform ( Fig. 11 )............................................. Eutrichillus Bates, 1885 Obs. : Only the type species of Eutrichillus was considered. At least some of the other species currently included in this genus, have morphological features that do not agree with the type species.

9(6). Elytra with outer apex spiniform........................................................................ 10

– Elytra with outer apex not spiniform..................................................................... 12

10(9). Lateral tubercles of the prothorax spiniform, with apex directed backward ( Figs. 40–42 ).. Trichotithonus Monné, 1990 (part)

– Lateral tubercles of the prothorax not spiniform, with apex not directed backward................................. 11

11(10). Body somewhat slender ( Figs. 22–23 )......................................... Lithargyrus Martins & Monné, 1974

– Body distinctly stout.......................................................... Leptocometes Bates, 1881 (part)

12(9). Lateral tubercles of the prothorax very large, placed centrally................................................. 13

– Lateral tubercles of the prothorax placed after middle, or short and placed about middle............................ 14

13(12). Elytral apex widely truncate ( Fig. 43 )............................................. Tuberastyochus Gilmour, 1959

– Elytral apex moderately narrowly, obliquely truncate, almost rounded ( Fig. 16 )........... Leptocometes Bates, 1881 (part)

14(12). Body length at least three times humeral width............................................................. 15

– Body shorter than three times humeral width............................................................... 17

15(14). Distance between upper eye lobes about twice width of one upper lobe ( Fig. 39 )........... .. Trichocanonura Dillon, 1956

– Distance between upper eye lobes from shorter to about equal to width of one upper lobe........................... 16

16(15). Apex of the scape reaching base of the elytra ( Fig. 29 )................................... Onalcidion Thomson, 1864

– Apex of the scape not reaching base of the elytra ( Fig. 30 )..................................... Ozineus Bates, 1863

17(14). Sides of prothorax distinctly rounded from anterolateral angles to apex of lateral tubercles; apex of lateral tubercles directed backward ( Figs. 5–6 )….............................................................. Baryssinus Bates, 1864

– Sides of prothorax not distinctly rounded from anterolateral angles to apex of lateral tubercles; apex of lateral tubercles not directed backward ( Figs. 27–28 )............................................... Oedopeza Audinet-Serville, 1835

18(4). Antennae 12-segmented ( Fig. 17–18 )............................................... Lepturgantes Gilmour, 1947

– Antennae 11-segmented............................................................................... 19

19(18). Erect setae restricted to elytral margins................................................................... 20

– Erect setae on the entire elytral surface................................................................... 21

20(19). Antennomeres V and/or VI in males with internal projections ( Fig. 32 )........................... Paroecus Bates, 1863

– Antennomeres without projections in both sexes ( Fig. 19 )....................... Lepturges (Chaeturges) Gilmour, 1959

21(19). Prothorax without distinct lateral tubercle ( Figs. 14–15 )............................... Graphisurus Kirby, 1837 (part)

– Prothorax with distinct lateral tubercle.................................................................... 22

22(21). Lateral tubercles of the prothorax spiniform............................................................... 23

– Lateral tubercles of the prothorax not spiniform............................................................ 25

23(22). Scape and antennomeres with long and moderately abundant erect setae ventrally ( Fig. 34 )........ Phrissolaus Bates, 1881

– Scape and antennomeres at most with sparse long and erect setae ventrally....................................... 24

24(23). Body slender; prothorax about as long as wide (excluding lateral tubercles) ( Fig. 10 )............... Dectes LeConte, 1852

– Body stout; prothorax transverse ( Fig. 44 )................................................... Valenus Casey, 1891

25(22). Lateral tubercles of the prothorax distinctly rounded........................................................ 26

– Lateral tubercles of the prothorax not rounded............................................................. 28

26(25). Elytra tuberculate ( Fig. 3 )....................................................... Amniscus Dejean, 1835 (part)

– Elytra not tuberculate................................................................................. 27

27(26). Antennae distinctly longer than body ( Figs. 24–26 ).............................. Neoeutrypanus Monné, 1977 (part)

– Antennae at most slightly longer than body ( Fig. 12 )....................................... Glaucotes Casey, 1913

28(25). Inner metatibial spur distinctly longer than pedicel ( Fig. 36 )................................ Tenthras Thomson, 1864

– Inner metatibial spur at most as long as pedicel............................................................. 29

29(28). Elytra tuberculate, often with tufted tubercles.............................................................. 30

– Elytra without tubercles............................................................................... 32

30(29). Body slender, at least about three times as long as humeral width ( Fig. 13 )................ Granastyochus Gilmour, 1959

– Body stout, distinctly shorter than three times humeral width.................................................. 31

31(30). Prosternal process near middle angularly expanded each side toward procoxae ( Fig. 38 )....... Trichastylopsis Dillon, 1956

– Prosternal process not expanded laterally ( Fig. 3 )..................................... Amniscus Dejean, 1835 (part) Obs.: Apparently, Trichastylopsis hoguei Chemsak & Linsley, 1979 does not belong to this genus.

32(29). Lateral tubercles of the prothorax placed near the posterolateral angles ( Figs. 33, 47 )......... Pentheochaetes Melzer, 1932

– Lateral tubercles of the prothorax not placed near the posterolateral angles....................................... 33

33(32). Sides of prothorax distinctly rounded from anterolateral angles to apex of lateral tubercles ( Figs. 1–2 ).. Alcidion Sturm, 1843

– Sides of prothorax not distinctly rounded from anterolateral angles to apex of lateral tuber-cles ……………………………………………………………………………..… 34

34(33). Lateral tubercles of the prothorax very small............................................................... 35

– Lateral tubercles of the prothorax large or at least moderately large............................................. 36

35(34). Mesoventral process tuberculate ( Fig. 35 )................................... Pseudocobelura Martins & Monné, 1974

– Mesoventral process not tuberculate ( Fig. 31 )................................................ Palame Bates, 1864

36(34). Apex of the lateral tubercles of the prothorax directed backward ( Figs. 20-21 )............. Lepturgotrichona Gilmour, 1957

– Apex of the lateral tubercles of the prothorax not directed backward............................................ 37 Obs.: The generic allocation of Lepturgotrichona bordoni Monné & Martins, 1976 , and L. cubaecola (Fisher, 1942) needs to be confirmed because the prothoracic shape is very different from that of the type species of the genus.

37(36). Female lacking very long ovipositor; male lacking large dark V-shaped macula on basal third of the dorsal surface (when dark area is present, it is not V-shaped)....................................................................... 38

– Female with long ovipositor; male with large dark V-shaped macula on basal third of the dorsal surface................ 39

38(27). Elytral apex obliquely truncate or subrounded ( Figs. 24–26 )........................ Neoeutrypanus Monné, 1977 (part)

– Elytral apex truncate with outer angle slightly projected ( Fig. 8 )............................... Carphina Bates, 1872

38(37). Humeral carina present ( Figs. 24–26 ).......................................... Neoeutrypanus Monné, 1977 (part)

– Humeral carina absent................................................................................ 39 Obs.: Neoeutrypanus appears to be a non-monophyletic genus.

39(38). Male with last abdominal segment not entirely covered by elytra; elytra in both sexes with moderately narrow, well-defined, oblique yellowish pubescent band on basal half from humerus to suture ( Figs. 14–15 )....... Graphisurus Kirby, 1837 (part)

– Male with last abdominal segment covered by elytra; elytra in both sexes lacking well-defined oblique yellowish pubescent band on basal half ( Fig. 4 )......................................................... Antecrurisa Gilmour, 1960

Figures

FIGURES 1–16. 1–2) Alcidion humerale (Perty, 1832), male, Brazil (S„o Paulo) (from Monné et al. 2020): 1) Dorsal habitus; 2) Ventral habitus. 3) Amniscus praemorsus (Fabricius, 1793), lectotype, dorsal habitus (by Jesus Santiago Moure). 4) Antecrurisa apicalis (Bates, 1864), holotype, dorsal habitus (by Jesus Santiago Moure). 5) Baryssinus penicillatus Bates, 1864, holotype, dorsal habitus (by Jesus Santiago Moure). 6) Baryssinus bicirrifer Bates, 1872, holotype, dorsal habitus (by Jesus Santiago Moure). 7) Canidia canescens (Dillon, 1955), paratype, dorsal habitus (by Jesus Santiago Moure). 8) Carphina occulta Monné, 1990, paratype male, dorsal habitus (from Monné et al. 2020). 9) Cosmotoma adjuncta (Thomson, 1860), male, dorsal habitus, Brazil (Pará) (from Monné et al. 2020). 10) Dectes texanus LeConte, 1862, holotype, dorsal habitus (by Jesus Santiago Moure). 11) Eutrichillus comus (Bates, 1881), holotype, dorsal habitus (by Jesus Santiago Moure). 12) Glaucotes yuccivorous (Fall, 1907), syntype, dorsal habitus (from Bezark 2020). 13) Granastyochus elegantissimus (Tippmann, 1953), female, dorsal habitus, Peru (from Monné et al. 2020). 14) Graphisurus eucharis (Bates, 1885), holotype, dorsal habitus (by Jesus Santiago Moure). 15) Graphisurus vexillaris (Bates, 1872), lectotype female, dorsal habitus (by Jesus Santiago Moure). 16) Leptocometes hispidus Bates, 1881, male, dorsal habitus, Mexico (Chiapas) (from Monné et al. 2020).

FIGURES 33–47. 33) Pentheochaetes mystica Melzer, 1932, syntype male, Brazil (Rio de Janeiro), dorsal habitus (from Monné et al. 2020). 34) Phrissolaus inspersus Bates, 1881, lectotype, dorsal habitus (by Jesus Santiago Moure). 35) Pseudocobelura prolixa (Bates, 1864), male, dorsal habitus, Brazil (Pará) (from Monné et al. 2020). 36) Tenthras obliteratus Thomson, 1864, female, dorsal habitus, Brazil (Goiás) (from Monné et al. 2020). 37) Trichalphus pilosus Bates, 1881, lectotype, dorsal habitus (by Jesus Santiago Moure). 38) Trichastylopsis albidus (LeConte, 1852), holotype, dorsal habitus (by Jesus Santiago Moure). 39) Trichocanonura linearis (Skinner, 1905), dorsal habitus (from Bezark 2020). 40–42) Trichotithonus curvatus (Bates, 1885), holotype male of Pentheochaetes nitidus Monné & Martins, 1976 (= Trichotithonus curvatus), Brazil (Santa Catarina) (from Monné et al. 2020): 40) Dorsal habitus; 41) Ventral habitus; 42) Lateral habitus. 43) Tuberastyochus tenebrosus (Bates, 1881), holotype female, dorsal habitus (by Jesus Santiago Moure). 44) Valenus inornatus Casey, 1891, holotype, dorsal habitus (from Lingafelter et al. 2020). 45–46) Catharesthes elegans Bates, 1881, holotype (by Jesus Santiago Moure): 45) Dorsal habitus; 46) Elytra, detail of posterior half. 47) Pentheochaetes apicalis Melzer, 1934, holotype, dorsal habitus (by Jesus Santiago Moure).

FIGURES 17–32. 17) Lepturgantes variegatus Gilmour, 1957, holotype female, dorsal habitus (by Jesus Santiago Moure). 18) Lepturgantes pacificus Gilmour, 1960, holotype, dorsal habitus (by Jesus Santiago Moure). 19) Lepturges (Chaeturges) inscriptus Bates, 1863, dorsal habitus, female, Brazil (Espírito Santo) (from Monné et al. 2020). 20) Lepturgotrichona stigmatica (Bates, 1881), lectotype, dorsal habitus (by Jesus Santiago Moure). 21) Leptrichillus minutus Gilmour, 1960 (= Lepturgotrichona stigmatica), holotype, dorsal habitus (by Jesus Santiago Moure). 22–23) Lithargyrus melzeri Martins & Monné, 1974, holotype male, Brazil (Santa Catarina) (from Monné et al. 2020): 22) Dorsal habitus; 23) Lateral habitus. 24) Neoeutrypanus decorus (Bates, 1881), holotype female, dorsal habitus (by Jesus Santiago Moure). 25) Neoeutrypanus nitidus, holotype, dorsal habitus (by Jesus Santiago Moure). 26) Neoeutrypanus maya Monné & Botero, 2017, holotype male, dorsal habitus (from Monné & Botero 2017). 27–28) Oedopeza ocellata (Fabricius, 1801), holotype: 27) Dorsal habitus (from Nearns et al. 2017); 28) Lateral habitus (by Jesus Santiago Moure). 29) Onalcidion pictulum (White, 1855), syntype, dorsal habitus (by Jesus Santiago Moure). 30) Ozineus elongatus Bates, 1863, holotype, dorsal habitus (by Jesus Santiago Moure). 31) Palame crassimana Bates, 1864, male, dorsal habitus, Guyana (from Monné et al. 2020). 32) Paroecus rigidus Bates, 1863, holotype male, dorsal habitus (by Jesus Santiago Moure).