A featherwing beetle without wings: re-discovery and second species of Rioneta (Coleoptera: Ptiliidae) from the Uluguru Mountains, Tanzania
Author
Grebennikov, Vasily V.
text
Zootaxa
2008
1732
45
53
journal article
49808
10.5281/zenodo.181365
054c3e51-58a4-477c-8ed3-cf546e522202
1175-5326
181365
Rioneta inexpectata
sp. n.
(
Figs 3, 4
)
Diagnosis.
Differs from
R. uluguruensis
by markedly narrower body (
Figs 3, 4
).
FIGURES 16–22.
Rioneta uluguruensis
, details of morphology. 16—habitus, ventral, left legs omitted, aedeagus and metendosternite shown; 18—head, dorsal, antennomeres 2–11 omitted; 18—left fore-tarsus and tibia, ventral (separately shown enlarged bifurcate spine on apical part of tibia); 19—right hind leg, ventral (separately shown enlarged tarsus with two visible apical tarsomeres); 20—mouthparts (maxillae, mentum, and labium), ventral; 21—right antenna, dorsal; 22—clypeus, dorsal.
Description.
With the characters of the genus. Body length
1.07–1.19 mm
(mean
1.13 mm
, n=4), pronotal length
0.27–0.29 mm
(mean
0.28 mm
; n=4); pronotal width 0.47–0.51 (mean 0.49; n=4); ratio pronotal width/ length 1.73–1.80 (mean 1.77; n=4).
Material studied.
Holotype
(dry mounted on card, not sexed): “
Tanzania
: Uluguru Mts., W slope between Tchenzema vil. and Lukwangule Plateau, H-
2200 m
.
Oct. 19–21, 2002
.V. Grebennikov leg.” (
MRAC
).
Paratypes
: 39 (of them 27 dry mounted on cards and 12 mounted on two Euparal microscope slides; with same data as the
holotype
(
MRAC
,
CNC
).
Etymology.
The specific epithet is the Latin adjective
expectatus
(=
exspectatus
), -
a, -um
(awaited, looked for) negated by the prefix
in
and referring to the unexpected discovery of this species.