A mountain of millipedes VII: The genus Eviulisoma Silvestri, 1910, in the Udzungwa Mountains, Tanzania, and related species from other Eastern Arc Mountains. With notes on Eoseviulisoma Brolemann, 1920, and Suohelisoma Hoffman, 1963 (Diplopoda, Polydesmida, Paradoxosomatidae)
Author
Enghoff, Henrik
text
European Journal of Taxonomy
2018
2018-06-19
445
1
90
journal article
10.5852/ejt.2018.445
5dfd4ff4-6c8b-47f4-9aa7-0f6b1b2af967
1489598
852A3F68-B728-413A-B12E-56F306D56C35
Eviulisoma navuncus
sp. nov.
urn:lsid:zoobank.org:act:91
A53055
-C236-4F4E-A32A-172D2289DE25
Fig.18
Diagnosis
Differs from other species of the
E. kwabuniense
group by having a long, curved side branch from
map
fitting over the semicircular dorsal lobe of the solenophore, in combination with an extremely slender, spinose
iap.
Etymology
The name is a noun in apposition, from the Latin
navis
(ʻboatʼ) and
uncus
(ʻhookʼ), referring to the boathook shape of the mesal acropodital process.
Material studied
(total: 7 ♂♂)
Holotype
TANZANIA
: ♂,
Kitungulu FR
,
1500 m
a.s.l.
,
08°09′ S
,
36°05′ E
, forest,
Jan.1996
, M.
Andersen
, P.
Gravlund
and
A
. Jakobsen leg. (
ZMUC
).
Paratypes
TANZANIA
: 6 ♂♂, “
Bomalamzinga
,
Uzungwa FR
,
Muhange Village
,
Uzungwa Mountains
”, 36.03/8.12 [must be longtitude / latitude, but format unknown],
19 Jun. 1979
, W.
A
. Rodgers leg. (
VMNH
).
Referred non-type material
TANZANIA
:
6 ♀♀
, tentatively referred to this species, same collection data as for paratypes (
VMNH
).
Description
(male)
Fig. 18.
Eviulisoma navuncus
sp. nov.
, holotype, right gonopod.
A
. Mesal view.
B
. Lateral view.
C
. Ventro-lateral view.
D
. Ventral view. Aluminium tape used for mounting visible in lower left corner of B. Abbreviations:
cxl
= coxal lobe;
iap
= intermediate acropodital process;
map
= mesal acropodital process;
prf
= prefemoral part;
ra
= ridged area of solenophore;
slm
= solenomere;
sph-d
,
sph-i
,
sph-v
= dorsal, intermediate and ventral lobes of solenophore. Scale bars: 0.1 mm.
SIZE. Length
22 mm
, max. width 2.0 mm.
COLOUR. After 21 years in alcohol uniform whitish yellow, only vertigial region of head and hind edge of body rings very light brown.
ANTENNAE. Reaching back to middle of ring 3.
BODY RINGS. Paranota indicated by very faint keels on body rings 2 (as in
Fig. 4C
), otherwise completely absent. Stricture between pro- and metazonite striolate. A transverse row of setae on all body rings.
HYPOPROCT. Trapezoid, with three apical tubercles.
LEGS. Length 0.9 × body width. Relative lengths of podomeres: prefemur = femur> tarsus> postfemur = tibia. Scopulae on femur, postfemur, tibia and tarsus, disappearing towards hind end.
STERNUM 5.
A
broadly rounded-rectangular process between legs 4.
STERNUM 6. Deeply excavated. Rim of excavation simple.
GONOPODS (
Fig. 18
). Coxal lobe (
cxl
) large. Prefemoral part (
prf
) ca half as long as acropodite. Mesal acropodital process (
map
) a long, slightly sinuous rod, with pointed tip and a large, pointed lateral hook subapically; hook curving over dorsal lobe (
sph-d
) of solenophore. Intermediate acropodital process (
iap
) very thin, straight, covered in long spines along dorsal side. Solenophore (
sph
) large, with dorsal lobe (
sph-d
) largest, broadly rounded, fitting under lateral hook of
map
, intermediate lobe (
sph-i
) very small, ventral lobe (
sph-v
) broadly rounded; internal surface of
sph
with a coarsely ridged area (
ra
).
Distribution and habitat
Known from two sites, one in Kitungulu / Kiranzi FR, the other in Udzungwa Scarp FR. Altitudinal range includes
1500 m
. Collected together with
E. dabagaense
Kraus, 1958
and
E. nessiteras
sp. nov.
in Kitungulu / Kiranzi FR.
Remarks
Interpreting the locality name “Bomalamzinga” caused a lot of problems until Andy Marshall (pers. comm.) informed me that it refers to a place at the northern end of the Udzungwa Scarp FR.