A review of the millipedes (Diplopoda) of Namibia, with identification keys and descriptions of two new genera and five new species
Author
Vohland, Katrin
Author
Hamer, Michelle
text
African Invertebrates
2013
2013-06-30
54
1
251
251
journal article
2305-2562
Syndesmogenus fragilis
Vohland
,
sp. n.
Figs 88–90
Etymology: From Latin
fragilis
(brittle, weak), in reference to the extremely small size of the species.
Diagnosis:Anal segment without spines, epiproct strongly curved downwards, sides with small folds (
Fig. 89
). Gonopod solenomere (
Fig. 88
,
s
) subdistally with short, darkened process (
Fig. 88
,
sp2
), distally with larger spine-like process (
Fig. 88
,
ap
).
Description:
Size
: Very small millipede, width 0.8 mm; 74 segments.
Colour
: Brown, dorsally lighter, ventrally light with dark stripes. Head brown, slightly reddish. Antenna brown, antennomeres distally with white border.
Figs 88–90.
Syndesmogenus fragilis
sp. n.
, ♂: (88) gonopod, aboral view; (89) last segments, lateral view; (90) head and first segments, lateral view.Abbreviations: (ap) apical process, (col) collum, (e) epiproct, (hy) hypoproct, (pa) paraproct, (prfp) prefemoral process, (s) solenomere, (sp2) small process of solenomere, (tc) telocoxite process. Scale bar = 1 mm.
Head
: Epicranial and interocular suture present, 6 supralabral pits, eyes subquadratic. Antenna stout, reaching 3
rd
segment, antennomere 6>5>2>4=3>1>7, with antenomeres 5 and 6 thicker than the others (
Fig. 90
).
Collum
: 3 folds, leaving space for antenna (
Fig. 90
).
Tergites and sternites
: Prozonites with faint longitudinal striation, metazonites with some more marked striations ventrally. Sternites finely striated. Limbus faintly undulated. Paraprocts striated. Epiprocts bent downwards (
Fig. 89
), paraprocts without spines. Gonopod aperture anteriorly with sternite and legs of 6
th
segment clearly visible.
Legs
: Pads become smaller on more posterior legs.
Gonopods
: Telocoxite with darkened process (
Fig. 88
,
tc
). Telopodite with prefemoral process (
Fig. 88
,
prfp
), tarsus with smooth border, encircling long slender solenomere. Further distally, there is a small process (
Fig. 88
,
sp2
), distal to which solenomere becomes broader, the apical region having a spinous lateral branch (
Fig. 88
,
ap
).
Holotype
:
♂
NAMIBIA
:
Helio
,
19°03'S
16°29'E
,
27.iii–4.v.1988
,
E. Griffin
,
preservative pitfall trap
(
SMN 21898
) (
NMNW
).