Bicoxidens

Mwabvu, Tarombera, Hamer, Michelle L. & Slotow, Robert H., 2007, A taxonomic review of the southern African millipede genus, Bicoxidens Attems, 1928 (Diplopoda: Spirostreptida: Spirostreptidae), with the description of three new species and a tentative phylogeny, Zootaxa 1452, pp. 1-23 : 17-18

Key to the species of Bicoxidens

1. Apical region of telocoxite with a flattened median process that overlaps the opposite one; median leaf with an apical median axe-shaped process; telopodite with a long femoral lobe ( Figs. 2 a, 5a)...................2

- Apical region of telocoxite without a flattened median process; median leaf without apical axe-shaped process; telopodite with a short femoral lobe ( Figs 1 a, 3a, 4a, 6a, 7a, 8a)...................................................3

2. Apical telocoxite with a horizontal lateral process; apically lateral leaf with a small, transverse, ear-shaped aboral projection ( Fig. 5b ) ................................................................................................................ grandis

- Apical telocoxite without lateral process; apical lateral leaf with a small rounded aboral lobe on distal margin ( Fig. 2b ) ............................................................................................................................. flavicollis

3. Apical telocoxite T-shaped, with three median processes and a long lateral process. Middle median process overlaps with the process from the opposite telocoxite ( Figs. 3 a, 3b) ..................................... friendi

- Apical telocoxite not T-shaped, without three median or a long lateral process..........................................4

4. Apical telocoxite not oval. Aboral lateral leaf lobe basally rounded and not produced into a lateral extension................................................................................................................................................................5

- Apical telocoxite oval. Aboral lateral leaf lobe basally not rounded and produced into a lateral extension ( Fig. 8 a)....................................................................................................................................... nyathi sp. n

5. Apical telocoxite with two broadly rounded median processes that may be in touch................................6

- Apical telocoxite with three narrowly rounded or overlapping median processes.......................................7

6. Apical telocoxite with an overhanging folded lateral process above and not extending beyond knee bend; median processes do not touch; median leaf constricted subapically but without a basal lateral lobe ( Figs. 4 a, 4b) ................................................................................................................................ gokwensis sp. n.

- Apical telocoxite with a broadly rounded lateral process above and extending beyond knee bend; median processes reciprocally in touch, leaving a window between them; sub-apically (below setose area), median leaf constricted and with a basal lateral lobe ( Fig. 6 a) ........................................ matopoensis sp. n

7. Apical telocoxite bird head-shaped with three median processes, the middle long, beak-like and overlapping the opposite one ( Figs. 1 a, 1b)................................................................................................... brincki

- Apical telocoxite not bird head-shaped, with two median processes that do not overlap. ( Fig. 7 a) ............. .................................................................................................................................................... nigerrimus

Figures

FIGURE 4. Bicoxidens gokwensis sp. nov. (MRAC 20556). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 2. B. flavicollis (NMZ / D 232). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 1. B. brincki (MZLU / L 951 / 3645). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 5. B. grandis (NMSA 8884). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 3. B. friendi (MRAC 20557). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 8. B. nyathi sp. nov. (NMZ / D 747). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 6. B. matopoensis sp. nov. (NMZ / D 562). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.

FIGURE 7. B. nigerrimus (SAM B 3361). a, oral view of gonopods; b, aboral view of gonopods; c, oral view of prefemoral lobe of first pair of male legs; d, lateral view of collum.