Rutelini, MacLeay, 1819

Bento, Matheus & Fonseca, Claudio Ruy Vasconcelos da, 2020, Pelidnota granulata (Gory, 1834) (Coleoptera, Scarabaeidae, Rutelinae): description of the pupa and new records from Amazonas state, Brazil, Papéis Avulsos de Zoologia 60, pp. 1-6 : 5

Key to genera and species of Rutelini based on known pupae (modified from Bento et al. (2018))

Pupae of Macraspis morio Burmeister, 1844 were measured and figured by Oliveira et al. (2016), those of Pelidnota punctata (Linnaeus, 1758) were figured by Isaac (1907), and those of Rutelisca durangoana Ohaus, 1905 were described by Morón & Deloya (1991) bearing 5 pairs of dioneiform organs. More morphological studies are needed to differentiate the pupae of these species from others.The pupae of Macraspis (step 14 and subsequent steps) included here need more studies to clarify and check some diagnoses.

1. Abdomen with 5-6 pairs of dioneiform organs ............................................................................................................................................................................. 2

1’. Abdomen with 4 pairs of dioneiform organs............................................................................................................................................................................... 12

2. Fold of abdominal tergite IX with small spines and without dense group of setae.................................................................................................. Cnemida retusa

2’. Fold of abdominal tergite IX fold without spines and with dense group of short setae................................................................................................................. 3

3. Abdomen with 6 pairs of dioneiform organs............................................................................................................................................ Chrysophora chrysochlora

3’. Abdomen with 5 pairs of dioneiform organs................................................................................................................................................................................. 4

4. Metatibia long,arcuate,distinctly longer than metafemur........................................................................................................................................................... 5

4’. Metatibia short,straight or slightly arcuate,as long as or shorter than metafemur...................................................................................................................... 6

5. Posterior margin of metacoxa with short process; posterior margin of metafemur with short preapical process; inner margin of metatibia with short medial process............................................................................................................................................................................................. Paraheterosternus luedeckei

5’. Metacoxa,metafemur and metatibia without process........................................................................................................................... Heterosternus buprestoides

6. Abdominal sternites VII-VIII combined slightly longer than II-VI combined................................................................................................................ Rutela dorcyi

6’. Abdominal sternites VII-VIII combined shorter than II-VI combined............................................................................................................................................. 7

7. Posterior process of prosternum not flat and barely evident between procoxae;femur-tibia articulations hidden in dorsal view .............................. Chlorota …8

7’. Posterior process of prosternum flat and evident between procoxae,femur-tibia articulations exposed in dorsal view............................................................... 9

8. Pubescence of posterolateral fold of abdominal tergite IX restrict to posterior half;abdominal sternite VIII and IX coalesced..................................... C.cincticollis

8’. Pubescence of posterolateral fold of abdominal tergite IX present in all lateral margin;abdominal sternite VIII and IX well defined ......................... C.paulistana

9. Metatibia almost straight in both sexes; metafemur-tibia articulation not reaching the level of spiracles; abdominal spiracle I exposed, not hidden by wing thecae.....................................................................................................................................................................................................................................10

9’. Metatibia with inner margin slightly arcuate in males;metafemur-tibia articulation reaching the level of spiracles;abdominal spiracle I hidden by wing thecae Chrysina macropus (cf., Morón,1990:plate C)

10. Pronotum with ecdysial line indistinct................................................................................................................................................................ Homonyx chalceus

10’. Pronotum with ecdysial line distinct........................................................................................................................................................................ Pelidnota …11

11. Middle area of mesonotum as long as wide, with posteromedial margin rounded and not extended to abdominal tergite I; posterior margin of metanotum almost straight and with a median lobe;dioneiform organs between tergites I-II explicitly defined........................................................................ P.granulata

11’. Middle area of mesonotum longer than wide, with posteromedial margin truncated and extending to abdominal tergite I; posterior margin of metanotum trapezoidal and without a median lobe;dioneiform organs between tergites I-II barely defined................................................................................ P.lugubris

12. Mesonotum as long as the pronotum or almost so,and not extended to abdominal tergite I........................................................................ Lagochile emarginata

12’. Mesonotum longer than pronotum and extended to abdominal tergite I...................................................................................................................................13

13. Head in dorsal view wider than half the pronotum at middle;profemur-tibia articulation exposed in dorsal view; abdominal spiracle I exposed, not hidden by wing thecae........................................................................................................................................................................................................... Rutela lineola

13’. Head in dorsal view narrower than half the pronotum at middle; profemur-tibia articulation hidden in dorsal view; abdominal spiracle I hidden by wing thecae................................................................................................................................................................................................................. Macraspis …14

14. Fold of abdominal tergite IX with reddish-brown short setae.....................................................................................................................................................15

14’. Fold of abdominal tergite IX with light yellow short setae..........................................................................................................................................................16

15. Frontoclypeal suture somewhat straight and medially indistinct...................................................................................................................................... M.cincta

15’. Frontoclypeal suture weakly sinuate and medially distinct (suture complete)................................................................................................................. M. chrysis

16. Frontoclypeal suture somewhat straight and medially indistinct..................................................................................................................................... M. festiva

16’. Frontoclypeal suture weakly or strongly sinuate and medially distinct (suture complete).......................................................................................................... 17

17. Abdominal sternites VIII-IX combined slightly longer than VII.............................................................................................................................. M.pseudochrysis

17’. Abdominal sternites VIII-IX combined as long as VI-VII combined or almost so .......................................................................................................................... 18

18. Frontoclypeal suture weakly sinuate;pronotum semicircular shaped in dorsal view (cf., Morón & Paucar-Cabrera,2003: fig.27).............................. M.rufonitida

18’. Frontoclypeal suture evidently sinuate;pronotum somewhat transversal.................................................................................................................... M. aterrima