Macroxenodes, SILVESTRI, 1948

Duy-Jacquemin, Monique Nguyen, 2009, Revision of the genera of Polyxenidae bearing pseudoarticulated gnathochilarial sensilla (Diplopoda, Polyxenida, Polyxenidae), with the description of two new species, Zoosystema 31 (4), pp. 829-848 : 834

KEY TO THE SPECIES OF THE GENUS MACROXENODES SILVESTRI, 1948

1. Antennal article VI with two groups (dorsal and postero-ventral) of sensilla basiconica ................................................................................................................................... 2

— Antennal article VI with dorsal row(s) of sensilla basiconica ....................................... 3

2. Postero-ventral group with 2 sensilla basiconica; outer palpus of gnathochilarium with less than 20 sensilla basiconica ..................................................... M. navassaensis n. sp.

— Postero-ventral group with 4-7 sensilla basiconica; outer palpus of gnathochilarium with more than 20 sensilla basiconica ............................................................ M. amazonicus

3. 3 rows of sensilla basiconica on antennal article VI ............................. M. jahynyi n. sp.

— 1 or 2 rows (antero-distal and proximal) of sensilla basiconica on antennal article VI. 4

4. 1 dorsal row of sensilla basiconica on antennal article VI ............................. M. poecilus

— 2 dorsal rows of sensilla basiconica on antennal article VI .......................................... 5

5. 2 or 3 rows of spherical papillae on anterior labral margin .......................... M. meinerti

— 4 or 5 rows of spherical papillae on anterior labral margin ........................... M. bartschi