Monographis, Attems, 1907

Huynh, Cuong, 2022, Four new species of Monographis Attems, 1907 (Diplopoda, Polyxenida, Polyxenidae) from Vietnam, Zootaxa 5214 (3), pp. 393-420 : 417-418

Key to species of the genus Monographis

( Monographis mira and M. annandalei have incomplete descriptions published by Turk (1947), and Silvestri (1948), respectively, therefore cannot be included in this key). The key is for characters observed in adults only as subadults or immatures may not have as many bacilliform sensilla mentioned in this key.

1 Antennal article VI with sensilla forming a crescent shape..................................................... 2

- Antennal article VI with sensilla forming a triangular shape................................................... 10

2 Greater than 15 bacilliform sensilla on antennal article VI......................... Monographis kraepelini ( Indonesia)

- Less than 15 bacilliform sensilla on antennal article VI....................................................... 3

3 Greater than 10 bacilliform sensilla antennal article VI....................................................... 4

- 10 or fewer bacilliform sensilla on antennal article VI........................................................ 5

4 Eleven bacilliform sensilla on antennal article VI, also labrum surface setose, anterior setiform process longer than the claw................................................................................ M. cattienensis ( Vietnam)

- Twelve bacilliform sensilla on antennal article VI, also labrum surface asetose, anterior setiform process less than 1/2 the length of the claw...................................................................... M. tamdaoensis ( Vietnam)

5 Seven bacilliform sensilla only on antennal article VI.................................... M. baihualingensis ( China)

- Between 8 and 10 bacilliform sensilla on antennal article VI................................................... 6

6 Labrum surface setose................................................................................. 7

- Labrum surface asetose................................................................................... 8

7 Anterior setiform process longer than the claw.............................................................. 9

- Anterior setiform process 1/3 length of claw............................................... M. sabahna ( Malaysia)

8 Anterior setiform process longer than the claw.......................................... M. thatsonensis ( Vietnam)

- Anterior setiform process 1/2 the length of the claw..................................... M. phuquocensis ( Vietnam)

9 Anterior margin of labrum with a row of acute triangular setae, adults large, body length greater than 4.5 mm .............................................................................................. M. malayna ( Malaysia)

- Anterior margin of labrum with a row of slender setae, adult body size nearly 3mm ............... M. demangei ( Vietnam)

10 Total bacilliform sensilla less than 24.................................................................... 11

- Total bacilliform sensilla more than 24................................................ M. condorensis ( Vietnam)

11 With 3 internal bacilliform sensilla..................................................... M. yunnanensis ( China)

- With five internal bacilliform sensilla.................................................................... 12

12 Claw robust........................................................................ M. tamoyoensis ( Brazil)

- Claw slender........................................................................................ 13

13 Anterior setiform process longer than the claw........................................ M. queenslandica ( Australia)

- Anterior setiform process equal or shorter than the claw...................................................... 14

14 Anterior setiform process half the claw length......................................... M. konkakinhensis ( Vietnam)

- Anterior setiform process same length as the claw...................................... M. dongnaiensis ( Vietnam)