Trogoderma, Dejean, 1821

Háva, Jiří & Trýzna, Miloš, 2022, A new Trogoderma from Madagascar (Coleoptera: Dermestidae: Megatominae) with a key to Madagascan species of the genus, Zootaxa 5195 (2), pp. 163-170 : 169

Key to the known Madagascan species of Trogoderma

(modified from Kadej & Háva 2015, Háva & Baňař 2017, and Háva & Matsumoto 2021; TL = total body length)

1 Elytra uni-coloured, brown, without fasciae or spots, covered only with yellow setation........ T. taomasinum Háva, 2009

- Elytra bi- or tri-coloured............................................................................... 2

2 Body rather elongate; antennal club of 7 antennomeres......................................................... 3

- Body rather oval; antennal club varying from 3 to 6 antennomeres.............................................. 4

3 Elytra dark brown, with three orange-red fasciae covered with yellow setation................. T. trifasciatum Háva, 2009

- Elytra reddish brown to black, with three white bands of setation................... T. tryznai Háva & Matsumoto, 2020

4 Antennal club of 3 antennomeres........................................................................ 5

- Antennal club of 4–6 antennomeres...................................................................... 6

5 Terminal antennomere short and brown; lateral parts of pronotum orange; head finely punctured.................................................................................................. T. fasciolata (Fairmaire, 1897)

- erminal antennomere long and black; lateral parts of pronotum dark brown or black; head coarsely punctured........................................................................................... T. impressiceps (Pic, 1915)

6 Antennal club of 4 antennomeres........................................................................ 7

- Antennal club of 5–6 antennomeres..................................................................... 12

7 Elytra brown with small spots of white setation.......................................... T. seminigrum Pic, 1915

- Elytra dark brown to black with reddish bands or orange fasciae and spot......................................... 8

8 Elytra black, with four transverse reddish bands and apical spot............................. T. caneparii Háva, 2018

- Elytra dark brown with one transverse orange band and one large orange spot..................................... 9

9 Elytra with two fasciae or spots......................................................................... 10

- Elytra with 3–4 transverse orange or reddish bands......................................................... 11

10 Elytra brown with one orange fascia and apically isolated spot covered with yellow setation......... T. horaki Háva, 2013

- Elytra black with one large orange spot on apex and one transverse fascia of white setation in the middle.............................................................................................. T. sambiranum Háva, 2009

11 Elytra dark-brown with three transverse, broad, orange-yellowish bands; male genitalia: parameres broad with narrow tip........................................................................... T. sahondrae Háva & Baňař, 2017

- Elytra dark-brown to black with three transverse, narrow, orange, divided bands; male genitalia: parameres broad with curved tip................................................................... T. zhantievi Háva & Matsumoto, 2020

12 Antennal club of 6 antennomeres; elytra black with small spots covered with white setation..... T. madecassum (Pic, 1924)

- Antennal club of 5 antennomeres....................................................................... 13

13 Elytra brown with one orange transverse fascia............................................................ 14

- Elytra dark brown or black without orange transverse fascia.................................................. 15

14 Elytral orange fascia narrow in anterior half, apical part of elytra covered with yellowish-white setation...................................................................................... T. wolfgangi Háva & Herrmann, 2008

- Elytral orange fasciae broad in anterior half; apical part of elytra covered with brown setation................................................................................................ T. sharpi Háva & Matsumoto, 2020

15 Elytra with three transverse fasciae of white setation................................ T. parasambiranum Háva, 2018

- Elytra with small setal spots........................................................................... 16

16 Elytra covered with dark brown setation, with only 2 small spots of light-coloured setae; TL: 1.80 mm ..................................................................................................... T. housei Háva, 2014

- Elytra covered with black setation, with more than 2 small spots of light-coloured setae; TL: 2.20–2.30 mm ................................................................................................... T. banari sp. nov.