Mecynotarsus, LaFerte-Senectere, 1849

Kejval, Zbyněk & Cz, Domažlice, 2013, Taxonomic revision of the Australian Notoxinae (Coleoptera: Anthicidae), Acta Entomologica Musei Nationalis Pragae (suppl.) 53, pp. 1-98: 9-14

publication ID

http://doi.org/10.5281/zenodo.4272709

publication LSID

lsid:zoobank.org:pub:37E0BCFC-F84A-4B2E-B554-0DC4AE42AD15

DOI

http://doi.org/10.5281/zenodo.4338835

persistent identifier

http://treatment.plazi.org/id/03E1270F-FFCC-FF9A-FE9C-D2F3210AFBAF

treatment provided by

Felipe

scientific name

Mecynotarsus
status

 

A key to Mecynotarsus   species of the Australian Region

1 (2) Elytra in female distinctly excavate apically ( Fig. 134 View Figs 133–140. 133 ); male protibiae with distinct pointed process subapically on inner margin ( Fig. 137 View Figs 133–140. 133 ); head vertex in male with sharp median incision ( Fig. 130 View Figs 126–132. 126–127 ); setation of elytra as in Fig. 174 View Figs 168–176 ; male abdominal character as in Figs 44–46 View Figs 40–46. 40–41 ; species occurring in New Caledonia. ............................ ............................................................................................... M. excavatus   sp. nov.

2 (1) Elytra simple, rather conjointly rounded apically; male protibiae simple; head vertex in male at most shallowly impressed medially, lacking any incision; species occurring in Australia.

3 (4) Elytral disc uneven, with distinct omoplates and postbasal impression; elytral setation bicoloured and unevenly ordered, mostly brownish, with whitish setae pointing mostly laterad and forming two conspicuous transverse bands ( Fig. 203 View Figs 202–209 ); elytral setae hairy and finely bifurcate apically; male characters as in Figs 76–79 View Figs 74–81. 74–75 . ............................... .................................................................................... M. mastersii MacLeay, 1872  

4 (3) Elytral disc evenly curved, lacking omoplates and postbasal impression; elytral setation mostly scaly and simple, if bifurcate, then pointing evenly posteriad, forming no transverse bands.

5 (20) Pronotal disc granulate, with numerous, more or less distinct granules scattered dorsally and dorso-laterally (laterally sparser and coarser; Figs 152 View Figs 150–158 , 166 View Figs 159–167 ).

6 (7) Elytral setae finely bifurcate apically ( Fig. 184 View Figs 177–185 ); antennae rather short; male characters as in Figs 110 View Figs 104–110. 104–105 , 111 View Figs 111–118. 111 . ................................................................ M. speciosus   sp. nov.

7 (6) Elytral setae simple, at most truncate apically; antennae conspicuously long.

8 (9) Antero-lateral margins of frons projecting into conspicuous, apically pointed, thornlike process ( Fig. 23 View Figs 23–32. 23–25 ); male characters as in Figs 24, 25 View Figs 23–32. 23–25 . ......... M. armifer   sp. nov.

9 (8) Antero-lateral margins of frons at most lobed, never with pointed process.

10 (13) Elytral setation longer and somewhat sparser, surface visible ( Fig. 183 View Figs 177–185 ).

11 (12) Elytra with numerous long tactile setae, including apical half; appressed setae of pronotal disc very fine, nearly frayed apically; distal antennomeres more robust, wider, antennomere X 1.8 times as long as wide; male characters as in Figs 106, 107 View Figs 104–110. 104–105 . ...... .................................................................................................... M. regalis   sp. nov.

12 (11) Elytra lacking tactile setae; appressed setae of pronotal disc coarser, well-shaped, truncate to shortly bifurcate apically; distal antennomeres slender, more elongate, antennomere X nearly twice as long as wide; male characters as in Figs 80, 81 View Figs 74–81. 74–75 . ..... ..................................................................................................... M. mollis   sp. nov.

13 (10) Elytral setation short and very dense, surface entirely obscured ( Fig. 175 View Figs 168–176 ).

14 (15) Antero-lateral margins of frons distinctly raised and moderately lobed (lobule smooth and glossy subapically); male characters as in Figs 42, 43 View Figs 40–46. 40–41 . ...................................... .............................................................................................. M. dearmatus   sp. nov.

15 (14) Antero-lateral margins of frons simple or at most slightly raised.

16 (17) Elytral setation somewhat heterogeneous, mostly appressed, with slightly raised setae of coarser punctures ( Fig. 178 View Figs 177–185 ), and some tactile setae distinct at least near base; male characters as in Figs 82, 83 View Figs 82–87. 82–83 . .................................................. M. nobilis   sp. n.

17 (16) Elytral setation quite uniformly short and appressed, tactile setae lacking, including basal portion.

18 (19) Larger, more robust species, body length 2.9–3.1 mm; darker elytral scales usually forming rather extensive and distinct brownish markings ( Fig. 196 View Figs 194–201 ); male characters as in Figs 55–57 View Figs 53–59. 53–54 . ................................................................. M. granulatus   sp. nov.

19 (18) Smaller, slender species, body length 2.2–2.6 mm; darker elytral scales forming mostly rather vague brownish spots; male characters as in Figs 62, 63 View Figs 60–66. 60–61 . ................... .................................................................................................. M. imitator   sp. nov.

20 (5) Pronotal disc at most with few minute granules near basal margin ( M. festivus   sp. nov.) or antero-medially near base of pronotal horn.

21 (26) Antero-lateral margins of frons with distinct process ( Figs 26–27, 30 View Figs 23–32. 23–25 , 128–129 View Figs 126–132. 126–127 ).

22 (23) Process of frontal margin conspicuously robust, long and curved, horn-like ( Figs 26 View Figs 23–32. 23–25 , 128 View Figs 126–132. 126–127 ). ......................................................................................... M. bicornis   sp. nov.

23 (22) Process of frontal margin much smaller, somewhat flattened.

24 (25) Paired rugules of clypeus very conspicuous ( Fig. 129 View Figs 126–132. 126–127 , marked by an arrow); process of frontal margin somewhat larger, its posterior tip rather rounded and pointing dorsally ( Fig. 27 View Figs 23–32. 23–25 ); male metatarsomere III moderately enlarged in apical half; male characters as in Figs 28, 29 View Figs 23–32. 23–25 . ....................................................... M. bidens   sp. nov.

25 (24) Paired rugules of clypeus minute; process of frontal margin lobed anteriorly, its posterior tip sharp and pointing evenly posteriorly ( Fig. 30 View Figs 23–32. 23–25 ); male metatarsomere III strongly enlarged in apical half; male characters as in Figs 31, 32 View Figs 23–32. 23–25 . ..................... .............................................................................................. M. bidentatus   sp. nov.

26 (21) Antero-lateral margins of frons simple or at most moderately raised / lobed, lacking any distinct process.

27 (30) Scales of elytra entirely covering surface, coalescent, with extremely fine, indistinct margins ( Fig. 173 View Figs 168–176 ).

28 (29) Body somewhat paler coloured, elytral scales at least partly with pale reddish tinge (mainly apically; Fig. 192 View Figs 186–193 ); parameres more robust and somewhat sinuously narrowing in apical third ( Fig. 41 View Figs 40–46. 40–41 ); male tergum VIII as in Figs 40 View Figs 40–46. 40–41 . ............................. ............................................................................................ M. concolor King, 1869  

29 (28) Body generally darker coloured, elytral scales dark brown and silvery, apex of elytra darker ( Fig. 197 View Figs 194–201 ); parameres more slender and evenly narrowing in apical third ( Fig. 61 View Figs 60–66. 60–61 ); male tergum VIII as in Fig. 60 View Figs 60–66. 60–61 . ................................... M. hortensis Lea, 1922  

30 (27) Scales of elytra well-spaced, if contiguous and entirely covering surface, then with margins clearly visible.

31 (34) Body setation generally scaly, scales short and wide, covering most of head surface, nearly all antennomeres, legs including tarsomeres, and dorsal side of pronotal horn.

32 (33) Eyes comparatively large; pronotal horn conspicuously slender and elongate, with extremely narrow crest ( Fig. 167 View Figs 159–167 ), body scales greyish, white and black, forming conspicuous, sharply outlined markings on elytra ( Figs 185 View Figs 177–185 , 208 View Figs 202–209 ); male characters as in Figs 112–115 View Figs 111–118. 111 . ....................................................................... M. weiri   sp. nov.

33 (32) Eyes very small; pronotal horn much wider and less elongate, its crest distinctly wider; body scales dark to pale brownish, partly mixed and thus markings of elytra less contrasting ( Fig. 189 View Figs 186–193 ); male characters as in Figs 15–18 View Figs 15–22. 15–18 . .................... ................................................................................................... M. auceps   sp. nov.

34 (31) Body setation at least partly hairy, pronotal horn sometimes with hairy or scaly setation, but never entirely covered dorsally (except for rugules) by contiguous, appressed scales.

35 (36) Horn crest at most slightly indicated, dorsal side of pronotal horn evenly vaulted and covered by small rugules ( Fig. 155 View Figs 150–158 ); male characters as in Figs 72, 73 View Figs 67–73. 67–68 . .................. ........................................................................................................ M. leai Pic, 1942  

36 (35) Horn crest well-developed.

37 (40) Setation of elytra hairy, setae long and rather sharply pointed apically ( Fig. 170 View Figs 168–176 ).

38 (39) Pronotum globose, evenly rounded laterally in dorsal view; pronotal horn wider, subtriangular, posterior angles distinct; horn crest short and compact, situated rather posteriorly; body setation sparser, silvery, pronotum (antero-laterally) and elytra with numerous erect tactile setae; male characters as in Figs 38, 39 View Figs 33–39. 33–34 . ............................... ................................................................................................. M. centralis   sp. nov.

39 (38) Pronotum somewhat more elongate, unevenly rounded laterally in dorsal view; pronotal horn narrower, posterior angles indistinct ( Fig. 145 View Figs 141–149 ); horn crest longer, extending (evenly lowering) anteriorly; body setation denser, with goldish or cupreous shiny reflection, and forming brownish markings on elytra, pronotum (antero-laterally) and elytra lacking erect tactile setae; male characters as in Figs 19–21 View Figs 15–22. 15–18 . .................. .............................................................................................. M. auripilosus   sp. nov.

40 (37) Setation of elytra scaly, setae mostly distinctly shorter and wider, rounded to truncate apically, rarely linear, but never sharply pointed apically.

41 (42) Setation of elytra clearly double, comprising shorter, appressed, whitish scales and distinctly longer, linear, more raised, apically truncate, cupreous shining setae ( Fig. 169 View Figs 168–176 ); body length 3.7–4 mm; body coloration generally dark, at most with paler subapical spot on elytra ( Fig. 188 View Figs 186–193 ); male characters as in Figs 13, 14 View Figs 7–14. 7–9 . ..................... ......................................................................................... M. apicipennis Lea, 1895  

42 (41) Setation of elytra quite uniform, appressed, if nearly double, comprising longer and more raised scales ( M. canthariphilus   sp. nov.) then body length less then 2.5 mm and body generally paler coloured, mostly with darker markings of elytra as in Figs 187 View Figs 186–193 , 209. View Figs 202–209

43 (66) Dorsal surface of pronotal horn nearly bare, or at most sparsely, inconspicuously setose, especially in apical half.

44 (57) Elytral scales shortly oval, rather rounded apically ( Figs 177, 179, 182 View Figs 177–185 ), entirely appressed and very dense, mostly entirely covering surface; lacking scattered erect tactile setae of elytra (at most with some longer bristly setae on humeri and basal margin).

45 (46) Setation of genae rather coarse and modified, arranged as in Fig. 133 View Figs 133–140. 133 ; male characters as in Figs 108, 109 View Figs 104–110. 104–105 . ................................................................ M. setulosus   sp. nov.

46 (44) Setation of genae finer and evenly arranged (all setae pointing more or less anteriad).

47 (48) Head vertex sharply impressed along median margins of eyes ( Fig. 131 View Figs 126–132. 126–127 ); male characters as in Figs 47, 48 View Figs 47–52. 47–48 . ................................................. M. exophthalmus   sp. nov.

48 (47) Head vertex evenly curved, lacking any distinct impressions.

49 (50) Frontal portion of head prolonged; antero-lateral margins of frons subparallel and moderately raised / lobed ( Fig. 132 View Figs 126–132. 126–127 ); male characters as in Figs 67, 68 View Figs 67–73. 67–68 . .................. .......................................................................................... M. kingii MacLeay, 1872  

50 (49) Frontal portion of head relatively short; antero-lateral margins of frons narrowing anteriorly and simple.

51 (52) Larger, robust species (body length 3.5–4.2 mm; Fig. 204 View Figs 202–209 ); body scales generally distinctly glossy ( Fig. 179 View Figs 177–185 ); male characters as in Figs 84, 85 View Figs 82–87. 82–83 . .... M. obesus   sp. nov.

52 (51) Smaller species (body length 1.6–2.5 mm); body scales at most slightly glossy, if distinctly glossy ( M. pusillus   sp. nov.; mainly scales on pronotal disc), then body length less than 2.0 mm.

53 (54) Horn crest longer, evenly narrowing and lowering anteriorly; median rugules largely fused and forming irregular sculpture, which may be connected with rugules of crest margins; male characters as in Figs 102, 103 View Figs 98–103.98–101 . .................... M. pilbarensis   sp. nov.

54 (53) Horn crest short and more compact, situated more posteriorly; rugules of crest margins usually fused and forming evenly shaped rim; single, rather evenly shaped median longitudinal rugule ( Figs 156–158 View Figs 150–158 , 165 View Figs 159–167 ).

55 (56) Body scales at least partly whitish (always on pronotum); lobules of pronotal horn margins narrower and widely spaced, submarginal rugules rounded and rather unevenly scattered ( Figs 156–158 View Figs 150–158 ); posterior collar of pronotum with distinct fringe of whitish scales; male characters as in Figs 74, 75 View Figs 74–81. 74–75 . ............... M. magelae   sp. nov.

56 (55) Body scales mostly reddish to brownish, contiguous to nearly fused; lobules of pronotal horn margins wide, narrowly spaced to fused, and submarginal rugules elongate, contiguous to fused in dense rows ( Fig. 165 View Figs 159–167 ); posterior collar of pronotum with inconspicuous scales few (not really fringed); male characters as in Figs 104, 105 View Figs 104–110. 104–105 . ........................................................................................... M. pusillus   sp. nov.

57 (44) Elytral scales distinctly elongate (linear, nearly parallel-sided), truncate or at least subtruncate apically and mostly well-spaced ( Figs 172, 176 View Figs 168–176 ); elytra with or without scattered erect tactile setae.

58 (59) Elytral scales brownish and rather contrastingly whitish, partly mixed and also forming wide transverse bands ( Fig. 199 View Figs 194–201 ); pronotal horn rather long and slender; horn crest long, extending (evenly lowering) anteriorly; rugules of crest margins well-spaced; male characters as in Figs 69–71 View Figs 67–73. 67–68 . ...................................... M. kreusleri King, 1869  

59 (58) Elytral scales of various colours (whitish to greyish, reddish, brownish) but never forming wide transverse bands; pronotal horn usually short and wide (except M. grandior   sp. nov.); horn crest short and compact, situated rather posteriorly; rugules of crest margins contiguous to fused.

60 (61) Large species (body length 2.7–3.7 mm); body generally dark coloured and nearly opaque ( Fig. 195 View Figs 194–201 ); pronotum narrower, moderately convex laterally; pronotal horn longer and more slender ( Fig. 151 View Figs 150–158 ), rugules of crest margins mostly partly fused and forming semioval rim, interrupted anteriorly (see Variation); male characters as in Figs 53, 54 View Figs 53–59. 53–54 . ............................................................................. M. grandior   sp. nov.

61 (60) Mostly smaller species (body length 2.1–2.9 mm; except M. bullatus   sp. nov.); body generally paler coloured (pale reddish to reddish brown) and somewhat glossy; pronotum globose to moderately transverse, strongly convex laterally; pronotal horn short and wide, rather triangular, with distinct posterior angles ( Figs 147, 148 View Figs 141–149 , 162, 163 View Figs 159–167 ); rugules of crest margins either separate or forming semicircular rim (complete, never interrupted anteriorly).

62 (63) Rugules of crest margins contiguous to nearly fused, but never forming evenly shaped rim ( Figs 162, 163 View Figs 159–167 ); elytra lacking scattered tactile setae; male characters as in Figs 88–97 View Figs 88–97 . ............................................................................ M. phanophilus Lea, 1922  

63 (62) Rugules of crest margins fused and forming evenly shaped semicircular rim ( Figs 147, 148 View Figs 141–149 ); elytra with scattered tactile setae.

64 (65) Larger, more robust species (body length 2.7–3.7 mm); scaly setation of pronotal disc double, with longer subdecumbent and shorter appressed scales; scales of elytra somewhat shorter and wider ( Fig. 172 View Figs 168–176 ); elytra in females with apical margin rounded to straight, apical angle rather rounded; male characters as in Figs 33, 34 View Figs 33–39. 33–34 . .............. .................................................................................................. M. bullatus   sp. nov.

65 (64) Smaller species (body length 2.2–2.6 mm); scaly setation of pronotal disc simple, uniformly short and appressed; scales of elytra somewhat longer and narrower ( Fig. 176 View Figs 168–176 ); elytra in females with apical margin slightly concave and median apical angle thus more prominent; male characters as in Figs 58, 59 View Figs 53–59. 53–54 . ... M. hirtipennis   sp. nov.

66 (43) Dorsal surface of pronotal horn rather densely, conspicuously setose.

67 (74) Dorsal setation of pronotal horn hairy, distinctly finer than scales of pronotal disc ( Figs 143 View Figs 141–149 , 150 View Figs 150–158 , 161, 164 View Figs 159–167 ).

68 (69) Pronotal horn with single large, evenly shaped, longitudinal median rugule ( Fig. 161 View Figs 159–167 ); scales of elytra whitish and brownish, mixed ( Fig. 180 View Figs 177–185 ) and forming mostly distinct darker transverse bands /spots ( Fig. 205 View Figs 202–209 ); male characters as in Figs 86, 87 View Figs 82–87. 82–83 . .......... ................................................................................................. M. parvulus   sp. nov.

69 (68) Pronotal horn with numerous median rugules, separate or largely fused and forming irregular sculpture; scales of elytra mostly paler coloured (pale reddish), setose dark markings different or indistinct.

70 (71) Dark markings of elytra as in Fig. 194 View Figs 194–201 (see Variation); metatarsi distinctly longer then metatibiae; male characters as in Figs 51, 52 View Figs 47–52. 47–48 . .................. M. festivus   sp. nov.

71 (70) Dark markings of elytra as in Fig. 187 View Figs 186–193 (if well-developed); metatarsi at most slightly longer than metatibiae.

72 (73) Pronotum narrower, unevenly rounded laterally in dorsal view; pronotal horn more elongate ( Fig. 143 View Figs 141–149 ); scales of elytra rather linear and subdecumbent ( Fig. 168 View Figs 168–176 ); male sternum VII distinctly modified, subtruncate and moderately angled postero-laterally ( Fig. 10 View Figs 7–14. 7–9 ); male characters as in Figs 11, 12 View Figs 7–14. 7–9 . ........................ M. amabilis Lea, 1895  

73 (72) Pronotum wider, rather evenly rounded laterally in dorsal view; pronotal horn shorter and wider ( Fig. 164 View Figs 159–167 ); scales of elytra shorter and wider, drop-shaped, and appressed; male sternum VII simple; male characters as in Figs 98–101 View Figs 98–103.98–101 . ............. ................................................................................................ M. pilicornis   sp. nov.

74 (67) Dorsal setation of pronotal horn scaly, similar to that on pronotal disc ( Fig. 142 View Figs 141–149 ; somewhat finer only in M. canthariphilus   sp. nov.).

75 (76) Elytral and pronotal scales at dark coloured places cupreous shiny; dorsal surface of pronotal horn rather scantily and finely setose in apical half, scales distinct only latero-basally, rather narrow to linear; male sternum VII with smooth, sharply bordered, subapical facet ( Fig. 35 View Figs 33–39. 33–34 ); male tergum VIII and aedeagus as in Figs 36, 37 View Figs 33–39. 33–34 . ....................................................................................... M. canthariphilus   sp. nov.

76 (75) Elytra and pronotal disc usually with brownish setose markings, but scales never cupreous; dorsal surface of pronotal horn largely distinctly setose, setae forming distinctly widened scales; male sternum VII simple, at most somewhat sparsely setose subapically (except M. iuvenis   sp. nov.).

77 (78) Male sternum VII with small bordered median impression near base ( Fig. 64 View Figs 60–66. 60–61 ); posterior setation of male tergum VIII rather hairy (setae pointed apically), long and raised ( Fig. 65 View Figs 60–66. 60–61 ); aedeagus as in Fig. 66 View Figs 60–66. 60–61 . .................................... M. iuvenis   sp. nov.

78 (77) Male sternum VII simple, lacking bordered impression; posterior setation of male tergum VIII rather scaly (setae coarser, blunt apically), short and less raised ( Figs 7 View Figs 7–14. 7–9 , 49 View Figs 47–52. 47–48 , 116 View Figs 111–118. 111 ).

79 (80) Parameres of aedeagus moderately wide, subparallel and moderately curved in apical third, rather abruptly narrowed and slightly produced apically ( Fig. 50 View Figs 47–52. 47–48 ). ................ ...................................................................................................... M. fallax   sp. nov.

80 (79) Parameres of aedeagus narrower and strongly curved in apical third ( Fig. 9 View Figs 7–14. 7–9 ), with simply rounded apex.

81(82) Crest of pronotal horn usually wider ( Fig. 142 View Figs 141–149 ); parameres of aedeagus unevenly narrowing, with distinct preapical denticle / angulation on outer margin ( Fig. 8 View Figs 7–14. 7–9 ). ... .......................................................................................... M. albellus Pascoe, 1866  

82(81) Crest of pronotal horn usually narrower; parameres of aedeagus evenly narrowing, simple subapically ( Fig. 117 View Figs 111–118. 111 ). ............................................... M. ziczac King, 1869