Pogonosternum, Jeekel, 1965

Decker, Peter, Mesibov, Robert, Voigtländer, Karin & Xylander, Willi E. R., 2017, Revision of the Australian millipede genus Pogonosternum Jeekel, 1965, with descriptions of two new species (Diplopoda, Polydesmida, Paradoxosomatidae), European Journal of Taxonomy 259, pp. 1-34 : 31

Key to species of the genus Pogonosternum

1. Dorsum with one median light band ( Figs 12D , 15D , 22D ). Femoral process 1 (fp1) projecting distad of lateral process (lp) ( Figs 13 , 16 ) or femoral process 2 (fp2) directed proximad ( Figs 23 , 24 ). ..... 2

– Dorsum with two paramedian light bands, divided by a narrow darker stripe ( Figs 8D , 18D ). Femoral process 1 (fp1) not projecting distad of lateral process (lp) and femoral process 2 (fp2) small, directed distad ( Figs 9–10 ) ............................................................................................................................. 4

2. Body larger: width over 3.0 mm (male) or 3.2 mm (female). Femorite of gonopods elongate, slender. Gonopod process fp2 (and fp1) long and laminate, projecting distad of lp ( Fig. 13 ). Females with pointed process on coxa of legpair 2, reaching 3/4 of prefemur ( Fig. 5G ). P. adrianae Jeekel, 1982

– Body smaller: width under 2.3 mm (male) or 2.7 mm (female). Femorite of gonopods not particularly elongate or slender. Gonopod process fp2 short, not projecting distad of lp ( Figs 16 , 23–24 ). Females with rounded process on coxa of legpair 2, reaching 1/4 of prefemur ( Fig. 5H ) ............................. 3

3. Gonopod process fp1 long, distinctly projecting distad of lateral process (lp) and fp2 short, knoblike, directed proximad, lp directed mesad ( Fig. 16 ). Male tarsal and tibial brushes present to legpair 8–12 ........................................................................................................... P. laetificum Jeekel, 1982

– Gonopod process fp1 short, not projecting distad of lp and fp2 slender, curved, directed proximad, lp directed laterad ( Figs 23 , 24 ). Male tarsal and tibial brushes present to legpair 7 .......................................................................................................... P. montanum Decker , sp. nov.

4. Lateral process (lp) short or medium sized, not reaching or projecting distad of most distal position of prolongation of femorite (prof) ( Figs 9–10 ). Male tarsal and tibial brushes present to legpair 7, when prof not elongated ( Fig. 9 A–D); sometimes present to legpair 9, when prof distinctly elongated and broadly curved ( Fig. 9 E–H) ......................................................... P. nigrovirgatum (Carl, 1912)

– Lateral process (lp) long, nearly reaching or projecting distad of most distal position of prolongation of femorite (prof) ( Figs 19–20 ). Male tarsal and tibial brushes always present to legpair 9, prof not elongated and broadly curved .................................................................... P. jeekeli Decker , sp. nov.

Figures

Fig. 12. Pogonosternum adrianae Jeekel, 1982, male from Moe-Walhalla Road (NMV K-12207). A–B. Anterior rings. A. Left lateral view. B. Dorsal view. C–D. Rings 10 and 11. C. Left lateral view. D. Dorsal view. E–F. Posterior rings. E. Left lateral view. F. Dorsal view. Scale bars: 1 mm.

Fig. 15. Pogonosternum laetificum Jeekel, 1982, ♂, from Marysville, Mt Margaret Road (NMV K-12109). A–B. Anterior rings A. Left lateral view. B. Dorsal view. C–D. Rings 10 and 11. C. Left lateral view. D. Dorsal view. E–F. Posterior rings. E. Left lateral view. F. Dorsal view. Scale bars: 1 mm.

Fig. 22. Pogonosternum montanum Decker, sp. nov., ♂, from Batlow Road (NMV K-12184). A–B. Anterior rings A. Left lateral view. B. Dorsal view. C–D. Rings 10 and 11. C. Left lateral view. D. Dorsal view. E–F. Posterior rings. E. Left lateral view, F. Dorsal view. Scale bars: 1 mm.

Fig. 13. Pogonosternum adrianae Jeekel, 1982, male, right gonopod (NMV K-10719). A. Posterior view. B. Lateral view. C. Anterior view. D. Mesal view. Scale bars = 0.5 mm.

Fig. 16. Pogonosternum laetificum Jeekel, 1982, ♂, right gonopod. A–D.ANIC 64-000049 from Cumberland Valley Reserve. E–H. NMV K10249 from Murrindindi River. A, E. Posterior view. B, F. Lateral view. C, G. Anterior view. D, H. Mesal view. Scale bars: 0.5 mm.

Fig. 23. Pogonosternum montanum Decker, sp. nov., ♂, paratype from Mt Beauty, right gonopod (AMS KS106738). A. Posterior view. B. Lateral view. C. Anterior view. D. Mesal view. Abbreviations: see Material and methods. Scale bars: 0.5 mm.

Fig. 24. Pogonosternum montanum Decker, sp. nov., ♂, paratype from Mt Beauty, right gonopod (AMS KS106738). A. Posterior view. B. Mesal view. Abbreviations: see Material and methods. Scale bars: 0.5 mm.

Fig. 8. Pogonosternum nigrovirgatum (Carl, 1902), ♂, from Kennett River, Grey River Road (NMV K-13114). A–B. Anterior rings. A. Left lateral view. B. Dorsal view. C–D. Rings 10 and 11. C. Left lateral view. D. Dorsal view. E–F. Posterior rings. E. Left lateral view. F. Dorsal view. Scale bars: 1 mm.

Fig. 18. Pogonosternum jeekeli Decker, sp. nov., ♂, holotype from Warby-Ovens National Park, Devenish-Wangaratta Road (NMV K-12178). A–B. Anterior rings. A. left lateral view. B. Dorsal view. C–D. Rings 10 and 11. C. Left lateral view. D. Dorsal view. E–F. Posterior rings. E. Left lateral view, F. Dorsal view. Scale bars: 1 mm.

Fig. 9. Pogonosternum nigrovirgatum (Carl, 1902), ♂, right gonopod. A–D. AMS KS96017 Ferntree Gully. E–H. NMV K-10248 from Sandringham and Brighton. A, E. Posterior view. B, F. Lateral view. C, G. Anterior view. D, H. Mesal view. Scale bars: 0.5 mm.

Fig. 10. Pogonosternum nigrovirgatum (Carl, 1902), male, right gonopod (QM 23:40346). A. Posterior view. B. Lateral view. Scale bars: 0.5 mm.

Fig. 5. Legs of Pogonosternum. A, D–E. P. nigrovirgatum (Carl, 1902) (NMV K-12158). A. Male left leg 1, posterior view. B. P. nigrovirgatum (Carl, 1902) (QVMAG 23:46359), male right leg 2, anteroventral view. C. P. jeekeli Decker, sp. nov. (AMS KS106742), male midbody leg, anterior view. D. Male right leg 7, anterior view. E. Male tarsus of right legpair 7, anterior view. F. P. laetificum Jeeker, 1982 (NMV K-9957), female left leg 2, ventral view. G. P. adrianae Jeeker, 1982 (NMV K-12203), female left leg 2, anterior view. H. P. montanum Decker, sp. nov. (AMS KS106907), female left leg 2, anterior view. Scale bars: 0.2 mm.

Fig. 19. Pogonosternum jeekeli Decker, sp. nov., ♂, right gonopod. A–D. NMV K-10252 from Dyer Creek. E–H. NMV K-10250 from Bemm River. A, E. Posterior view. B, F. Lateral view. C, G. Anterior view. D, H. Mesal view. Scale bars: 0.5 mm.

Fig. 20. Pogonosternum jeekeli Decker, sp. nov., ♂, right gonopod, posterior view. A. NMV K-12178, holotype fromWarby-Ovens National Park, Devenish-Wangaratta Road.B. NMV K-12195 from Cabbage Tree Palms Flora Reserve. C. NMV K-12197 from Buchan Caves Reserve. D. SMNG VNR016986 from Waterhouse Conservation Area. Scale bars: 0.5 mm.