Melolontha, Fabricius, 1775
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publication ID |
https://doi.org/ 10.11646/zootaxa.5263.2.2 |
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publication LSID |
lsid:zoobank.org:pub:B07051F2-A15B-49EC-9A2F-91B9420FEA4A |
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DOI |
https://doi.org/10.5281/zenodo.7814556 |
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persistent identifier |
https://treatment.plazi.org/id/BC1F87FF-137F-FFF9-FF74-FD0EFA6EBF8C |
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treatment provided by |
Plazi |
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scientific name |
Melolontha |
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Key to species groups of Melolontha known from India (adopted and modified from Li et al. 2010)
1. Elytral disc glabrous or setiferous; colour of elytra light olive to dark green........................................ 2
– Elytral disc with dense setae; colour of elytra dark brown to yellowish-brown...................................... 3
2. Pronotum shining dorsally, lacking metallic reflection; elytron with one post-humeral and 2 to 3 basal setiferous patches ( Fig. 1 View FIGURES 1–4 ); apex of interval one deeply depressed along elytral disc; parameres with ventroapical process, distinctly elongate and gradually acuminate in lateral view ( Fig. 53 View FIGURES 53–64 ), lateral convexity completely absent ( Fig. 41 View FIGURES 41–46 )............... guttigera group
– Pronotum with dorsal metallic with green reflection; elytra without patches of setae at base ( Fig. 2 View FIGURES 1–4 ); apex of interval one weakly depressed along elytral disc; parameres without a ventroapical process ( Fig. 54 View FIGURES 53–64 ), lateral convexity weakly developed ( Fig. 42 View FIGURES 41–46 ) ........................................................................................ virescens group
3. Basal segment of antenna swollen at apex, with antennomeres 2 and 3 compressed (see Li et al. 2010, fig. 1) ( Figs. 26 View FIGURES 25–32 , 34 View FIGURES 33–40 , 66 View FIGURES 65–71 ); antennal club strongly to moderately curved outwardly ( Figs 25 View FIGURES 25–32 , 33 View FIGURES 33–40 , 66 View FIGURES 65–71 ); length of dense setae more on vertex than those of clypeus ( Figs. 25 View FIGURES 25–32 , 33 View FIGURES 33–40 , 66 View FIGURES 65–71 ); setae on inner surface of meso- and metatibiae stout and long ( Figs. 31 View FIGURES 25–32 , 37 View FIGURES 33–40 )................ … 4
– Basal segment of antennae moderately swollen apically, antennomeres 2 and 3 elongate (see Li et al. 2010, fig. 2); antennal club weakly to moderately curved outwardly (see Li et al. 2010, figs. 4, 5, 6); length of setae on vertex same as those on clypeus; setae on inner surface of meso- and metatibiae stout and short.................................................. 5
4. Antennal club strongly curved outwardly, 3.5 times as length of basal segments (see Li et al. 2010, fig. 3) ( Figs. 25 View FIGURES 25–32 , 33 View FIGURES 33–40 , 66 View FIGURES 65–71 ); outer metatibial spur subequal in length to length of metatarsomeres 1 and 2 combined ( Figs. 31 View FIGURES 25–32 , 37 View FIGURES 33–40 ); apical portion of pygidium not narrowed, more or less rounded ( Figs. 15, 16 View FIGURES 13–18 ); parameres symmetrical, apical process of left paramere not raised ( Figs. 43, 44 View FIGURES 41–46 , 70 View FIGURES 65–71 )....................................................................... phupanensis group
– Antennal club moderately curved outwardly, three times as length of basal segments; outer metatibial spur subequal to length of metatarsomere 1; apical portion of pygidium narrowed to form an elongate process ( Figs 17, 18 View FIGURES 13–18 ); parameres asymmetrical, apical process of left paramere relatively raised ( Figs 45, 46 View FIGURES 41–46 )...................................... aeneicollis group
5. Antennal club relatively shorter, weakly curved (see Li et al. 2010, fig. 6) ( Fig. 7 View FIGURES 5–8 ); pronotum with irregular serrations laterally; parameres with sharply developed pointed process at outer margin in dorsal view ( Fig. 47 View FIGURES 47–52 ).............. .. chinensis group
– Antennal club usually longer and moderately curved (see Li et al. 2010, figs. 4, 5) ( Figs. 8–12 View FIGURES 5–8 View FIGURES 9–12 ); pronotum with serrations developed anteriorly with basal one–half to one–third of margin smooth (see Li et al. 2010, fig. 8); parameres without pointed process ( Figs. 48–52 View FIGURES 47–52 ).................................................................................. 6
6. Central disc of pronotum evenly and densely punctate; midline of pygidium ridged completely or incompletely ( Figs. 20–22 View FIGURES 19–24 ); apical and dorsal process ( Figs. 48–50 View FIGURES 47–52 ) and lateral convexity of paramere well developed ( Figs. 60–62 View FIGURES 53–64 )..... .. carinata group
– Central disc of pronotum unevenly punctured; midline of pygidium smooth ( Figs 23–24 View FIGURES 19–24 ); apical process of paramere distinctly enlarged posteriorly, fusing with dorsal process ( Figs. 51–52 View FIGURES 47–52 ), lateral convexity broadly swollen laterally ( Figs. 63–64 View FIGURES 53–64 )............................................................................................... incana group
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