Unixenus, Jones, 1944

Huynh, Cuong, 2018, Two new species of penicillate millipedes (Diplopoda, Polyxenidae) from Phu Quoc Island in southern Vietnam, Zootaxa 4402 (2), pp. 283-302 : 292

Key to the described species of Unixenus

(This key was adapted from Short and Huynh (2013). The type species from India, U. padmanabhai , is not included due to insufficient detail in the published record; * indicates Australian species, ** African species)

1 Setae without projecting spines on legs.................................................................... 2

- Setae with projecting spines on legs.......................................................................6

2 One seta only on femur, no setae on tibia of legs 6–13......................................................... 3

- At least 2 setae on femur, 1 seta on tibia.................................................................... 5

3 3 bacilliform sensilla on antennal article VI.................................................................4

- 4 bacilliform sensilla on antennal article VI...................................................... U. myallensis *

4 Telotarsus with more than 2 processes on claw...................................................... U. attemsi *

- Telotarsus with 2 or less processes on claw.................................................... U. broelemanni **

5 No seta on tarsus 1 of legs 3–13, setiform sensillum between bacilliform sensilla 1 and 2 on antennal article VI................................................................................................... U. corringlensis *

- Seta present on tarsus 1 of legs 3–13, no setiform sensillum between bacilliform sensilla 1 and 2 on antennal article VI.......................................................................................... U. carnarvonensis *

6 One seta only on femur, no setae on tibia................................................................... 7

- At least 2 setae on femur, 1 seta on tibia.................................................................... 8

7 4 bacilliform sensilla on antennal article VI, 5 ornamental trichomes c .................................. U. corticolus * - 3 bacilliform sensilla on antennal article VI, 3 ornamental trichomes c................................ U. vuillaumei ** 8 3 bacilliform sensilla on antennal article VI................................................................. 9 - 4 bacilliform sensilla on antennal article VI.................................................... U. barrabaensis * 9 3 ornamental trichomes c per side, 2 pairs coxal glands....................................................... 10 - 5–9 ornamental trichomes c, 6 pairs coxal glands in male.......................................... U. karajinensis * 10 Telotarsus with robust claw................................................................... U. mjoebergi * - Telotarsus with slender claw......................................................... .. U. intragramineus sp. n.