Sphaerobelum

Semenyuk, Irina, Golovatch, Sergei I. & Wesener, Thomas, 2018, Four new species of giant pill-millipedes from Vietnam (Sphaerotheriida, Zephroniidae), Zootaxa 4459 (3), pp. 535-550: 543

publication ID

https://doi.org/10.11646/zootaxa.4459.3.7

publication LSID

lsid:zoobank.org:pub:8CA301B7-A24A-4CB1-8231-FF0BAFF175DA

persistent identifier

http://treatment.plazi.org/id/03D7EC02-FFD0-2428-CBBD-E69FDDA8FF66

treatment provided by

Plazi

scientific name

Sphaerobelum
status

 

Key to species of Sphaerobelum  (based mainly on male characters):

1. Anterior telopod with 3 telopoditomeres................................................................... 2

- Anterior telopod with 4 telopoditomeres.................................................................... 5

2. Tergites shiny, glabrous. Process of podomere 2 of posterior telopod swollen only at inner margin. Endotergum with 3–4 dense rows of short marginal bristles.................................................... S. clavigerum Verhoeff, 1924 

- Tergites hairy, process of podomere 2 of posterior telopod strongly swollen apically, spherical, broader than base of podomere.................................................................................................... 3

3. Inner margin of femur extended, with teeth. Lateral margin of prefemur with a sharp projection juxtaposed to coxal process. Body coloration black. Head smooth. Process of podomere 2 of posterior telopods truncated. Operculum of vulva two-horned, both horns blunt.................................................................... S. bicorne Attems, 1938 

- Inner margin of femur smooth, prefemur without a process. Body coloration dirty olive-brown; head punctured and densely hirsute......................................................................... S. hirsutum Verhoeff, 1924 

4. Inner margin of femur extended, with teeth ( Figs 2D View Figure , 5D View Figure ). Locking carina on anal shield short......................... 6

- Inner margin of femur smooth. Locking carina on anal shield very long........................................... 7

5. Body coloration dark olive, posterior margin uniformly light brown, antennae and legs conspicuously orange ( Fig. 1A View Figure ). Prefemur without lateral projection ( Fig. 2D View Figure ). Apical margins of vulval operculum equally converging towards a mesal tip ( Fig. 2I View Figure ). Tip of laterotergite 1 slightly extended, well-rounded. Male antennomere 6 thickened ( Fig. 3A View Figure )......... S. cattiense  sp. nov.

- Body coloration dark chestnut brown, posterior tergal margins black, legs dark brown, tips light brown ( Fig. 1B View Figure ). Lateral margin of prefemur with a sharp projection juxtaposed to coxal process ( Fig. 5D View Figure ). Apical margin of vulval operculum recessed centrally ( Fig. 5H View Figure ). Tip of laterotergite 1 slightly extended, sharp. Male antennomere 6 axe-shaped ( Fig. 6A View Figure ).............................................................................................. S. konkakinhense  sp. nov.

6. Podomere 3 of anterior telopod distally with a lateral extension; podomere 4 of posterior telopod distally with an incurved process overlapping with process of podomere 2. Marginal setae of terga not reaching posterior margin.................................................................................................... S. separatum Attems, 1953 

- Podomere 3 of anterior telopod cylindrical, without lateral extension; podomere 4 of posterior telopod without incurved pro- cess, but with 3 separate spines. Marginal setae of terga reaching the posterior margin................................................................................................... S. truncatum Wongthamwanich et al., 2012