African Dacus (Diptera: Tephritidae); New Species and Data, with Particular Reference to the Tel Aviv University Collection
Author
White, Ian M.
Author
Goodger, Kim F. M.
text
Zootaxa
2009
2127
1
49
journal article
10.5281/zenodo.274925
534e3106-2d37-4f90-98c7-fe3fab66dc7b
1175-5326
274925
Dacus
(
Lophodacus
)
xanthinus
sp.n.
Figures 58
–
63
.
Dacus apoxanthus
:
White 2006
: 117
, not
Bezzi 1924b
: 466
[misidentification, in part]
Diagnosis.
This species differs from
D. apoxanthus
Bezzi, 1924
b in having distinct xanthines (postpronotal lobe, notopleural wedge, scutellum, anepisternal, katatergite and katepisternum;
Figs 58, 61
).
Description.
Size
. Small, wing length,
4.2
–
4.7 mm
.
Head
(fig. 60). Pedicel+first flagellomere not longer than ptilinal suture. Face, antennal furrow with a dark spot, almost a four-sided shape filling width of furrow. Frons, frontal setae 1
–
2, orbital setae absent.
Thorax
(figs 58, 61). Scutum predominantly red-brown; postpronotal lobe yellow; notopleural callus yellow; notopleural xanthine wedge shaped (connected to notopleural callus), slightly constricted adjacent callus; lateral and medial postsutural vitta absent. Scutellum without any dark patterning (except for red-brown basal margin). Anepisternum with a yellow stripe from notopleural callus to katepisternum; extended onto katepisternum. Laterotergal xanthine confined to katatergite.
Thoracic setae
. Anterior notopleural seta present but reduced (thin); anterior supra-alar seta absent.
Wing
(fig. 63). Basal cells bc and c without an almost complete covering of microtrichia; cell bm without microtrichia. Narrow subbasal raised section of cell br without microtrichia. Crossvein R-M beyond middle of cell dm. Costal band reduced to a very narrow band, often barely discernable, and a small apical spot. Anal streak absent. Cells bc and c hyaline. Without any crossbanding.
Legs
(fig. 62). Forefemur pale, mid- and hindfemur pale to barely discernably bicolored (yellow, pale brown apically).
Abdomen
(fig. 59). Predominantly red-brown; tergite IV with a round black sublateral spot; tergite V with a broad medial black stripe. Tergites I
–
V all fused.
Male
. Tergite III without pecten; no dense microtrichia adjacent end A1+Cu2; no hindtibia preapical pad. Basal costal section (costagium) with thickened setae.
Female
. No data (aculeus retracted and not dissected).
FIGURES 58–63.
Dacus
(
Lophodacus
)
xanthinus
sp.n.
, holotype male.
58.
Mesonotum, dorsal view.
59.
Abdomen, dorsal view.
60.
Head, anterior view.
61.
Thorax, left lateral view.
62.
Legs, left lateral view; fore, mid, hind.
63.
Wing, dorsal view. Scale lines = 1mm.
Etymology.
Descriptive name for its prominent xanthines.
Material.
Holotype
male,
paratypes
,
2 males
,
1 female
,
NIGERIA
: Plateau State, Kurra Falls,
60km
s.e. Jos,
5
–
7.xii.1987
, A. Freidberg (
TAU
). 1
paratype
male,
SENEGAL
: Abbaye Keur Moussa,
5.x.2004
, J.F. Vayssieres, RVA1650 (
BMNH
).
Remarks.
The specimen from
Senegal
is teneral and was wrongly assumed to be an unusual variant of
D. apoxanthus
by
White (2006)
. The specimens from
Nigeria
are mature and the differences from southern and eastern African
D. apoxanthus
are both distinct and consistent.