Hylomus, Cook & Loomis, 1924

Nguyen, Anh D., Nguyen, Manh-Ha, Nguyen, Thu-Anh T. & Phung, Hong-Luong T., 2019, Review of Dragon Millipedes (Diplopoda, Polydesmida, Paradoxosomatidae) in the Fauna of Vietnam, with Descriptions of Three New Species, Zoological Studies 58 (14), pp. 1-31 : 25-26

publication ID

https://doi.org/ 10.6620/ZS.2019.58-14

DOI

https://doi.org/10.5281/zenodo.8065871

persistent identifier

https://treatment.plazi.org/id/03B987C4-FFF2-AE46-FCA2-FEF8FA0FA9A4

treatment provided by

Valdenar

scientific name

Hylomus
status

 

Key to species of the genus Hylomus View in CoL species in Vietnam

1. Paraterga wing-shaped ........................................... H. spectabilis View in CoL

- Paraterga antler- or spine-shaped ( Figs. 3 View Fig , 7 View Fig , 9 View Fig , 11 View Fig ) ................... 2

2. Paraterga antler-shaped ( Figs. 3 View Fig , 7 View Fig , 11 View Fig ) ...................................... 3

- Paraterga spine-shaped ( Fig. 9 View Fig ) ................................................ 11

3. Epiproct unmodified, without conspicuous setiferous knobs near tip ( Fig. 18 View Fig A−B) ......................................................................... 4

- Epiproct modified, with several evident setiferous knobs near tip ( Figs. 7F View Fig , 28B View Fig )............................................................................ 7

4. Metaterga smooth, more or less shining. Male femora unmodified ......................................................................................... H. asper View in CoL

- Metaterga rough, dull, granular. Male femora modified, inflated. ..................................................................................................... 5

5. Metaterga with more than 4 + 4 posterior setiferous spines on midbody segments ( Fig. 17A View Fig ). Body pale or weakly pigmented. Lamina lateralis of gonopod solenophore with densely setose region ( Figs. 19−20 View Fig View Fig ) ................................................... H. songoku

- Metaterga with less than 4 + 4 posterior setiferous spines on midbody segments. Body pigmented. Lamina lateralis of gonopos solenophore without densely setose region ................................ 9

6. Metaterga with 3 + 3 posterior setiferous spines. Male femora 6, 7 and 9 humped ventrally. Fifth sternum with a pair of tubercles between coxae 4 ....................................................... H. cervarius View in CoL

- Metaterga with 2 + 2 posterior setiferous spines. Male femora 6 and 7, sometime femur 5 modified, each with a large hump on ventral side. Fifth sternum with either rectangular process or bifid trapeziform lamina between coxae 4.......................................... 7

7. Body light or darkish brown. Fifth sternum with a bifid trapeziform lamina between coxae 4.......................................... 8

- Body reddish or pinkish. Fifth sternum with four round tubercles on a prominent, elevated, rectangular lamina between male coxae 4 .................................................................................. H. enghoffi View in CoL

8. Male femora 6, 7 humped ventrally ( Fig. 28D View Fig ). Tip of solenophore broadly rounded lobuliform ( Figs. 29−30 View Fig View Fig ) ............... ........................................................................................ H. namek

- Male femora 6, 7, sometimes 5, humped ventrally ( Fig. 23B View Fig ). Tip of solenophore acute ( Figs. 24−25 View Fig View Fig ) ............................. H. saiyans

9. At least 3 + 3 posterior metatergal spines on metaterga........... 10 - Only 1 + 1 posterior poor setae on metaterga ( Fig. 3B, D View Fig ) ........... ............................................................................... H. cattienensis View in CoL

10. Colour pink to red. Metaterga with numerous microsetae, and 4 + 4 posterior spines ( Fig. 4A, B, D, E View Fig ) ............................ H. pilosus View in CoL

- Colour dark to castaneous brown. Metaterga with microgranulation, and 3 + 3 posterior spines ............ H. proximus View in CoL

11. A row of 1 + 1 posterior spines on metaterga. Gonopod subfalcate, femorite slightly curved; solenomere long .................. .................................................................................... H. specialis View in CoL

- A row of 2 + 2 posterior tubercles/spines on metaterga. Gonopod falcate; solenophore short, pointed terminally ......................... 12

12. Fifth sternum with two independent setiferous tubercles between coxae 4. Antenna long and slender.............................. H. grandis View in CoL

- Fifth sternum with a bifid setiferous trapeziform lamina between coxae 4. Antenna short and stout ( Fig. 9B View Fig ) ................... H. holstii

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