Unixenus Jones 1944
Creators: name: Huynh, Cuong
name: Likhitrakarn, Natdanai
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polyxenida
Polyxenidae
Unixenus

description: Key to described species of Unixenus
This key was adapted from Short and Huynh (2020). The type species from India, U. padmanabhai, is not included due to insufficient detail in the published record.
1. Lateral palp of gnathochilarium with 13 conical sensilla...................................................... 2
- Lateral palp of gnathochilarium with 22 (female), 24 (male) conical sensilla............... Unixenus thailandicus sp. nov.
2. Setae without projecting spines on legs.................................................................... 3
- Setae with projecting spines on legs....................................................................... 7
3. Femur with only one seta, tibia of legs 6–13 without setae..................................................... 4
- Femur with at least two setae, tibia with one seta........................................................... 6
4. Antennomere V with 3 bacilliform sensilla................................................................. 5
- Antennomere VI with 4 bacilliform sensilla on................................................... U. myallensis
5. Telotarsus with more than 4 processes on claw....................................................... U. attemsi
- Telotarsus with 4 or less processes on claw....................................................... U. broelemanni
6. No seta on tarsus 1 of legs 3–13, setiform sensillum between bacilliform sensilla 1 and 2 on antennomere VI..................................................................................................... U. corringlensis
- Seta present on tarsus 1 of legs 3–13, no setiform sensillum between bacilliform sensilla 1 and 2 on antennomere VI............................................................................................. U. carnarvonensis
7. One seta only on femur, no setae on tibia....................................................................8
- At least 2 setae on femur, 1 seta on tibia................................................................... 9
8. Four bacilliform sensilla on antennomere VI, 5 ornamental trichomes c ................................. U. corticolus
- Three bacilliform sensilla on antennomere VI, 3 ornamental trichomes c................................ U. vuillaumei
9. Three bacilliform sensilla on antennomere VI.............................................................. 10
- Four bacilliform sensilla on antennomere VI................................................... .. U. barrabaensis
10. A setiform sensillum present between bacilliform sensilla 1 and 2............................................. 11
- A setiform sensillum present in anterior of bacilliform sensilla 1................................................ 13
11. Telotarsus with robust claw................................................................... U. mjoebergi
- Telotarsus with slender claw............................................................................ 12
12. Posterior process longer than ½ length of the claw............................................. U. intragramineus
- Posterior process shorter than ½ of the claw...................................................... U. moniqueae
13. Three ornamental trichomes c per side, two pairs of coxal glands in male.............................. U. mossmanus
- 5–9 ornamental trichomes c, six pairs of coxal glands in male....................................... U. karajinensis
description: Published as part of Huynh, Cuong & Likhitrakarn, Natdanai, 2023, First records of penicillate millipedes (Diplopoda, Polyxenidae) from Thailand, with descriptions of two new species, pp. 514-536 in Zootaxa 5383 (4) on pages 533-534, DOI: 10.11646/zootaxa.5383.4.5, http://zenodo.org/record/10369985