Systematics of Robustagramma, a new genus of New World Sphaeroceridae (Diptera)
Author
Marshall, Stephen A.
Author
Cui, Yongsheng
text
Zootaxa
2005
2005-07-29
1026
1
1
122
https://biotaxa.org/Zootaxa/article/view/zootaxa.1026.1.1
journal article
10.11646/zootaxa.1026.1.1
11755334
5049813
3EDC6787-C73B-4969-BA06-022D0532364F
Robustagramma minutiseta
Cui and Marshall
,
new species
(
Figs. 157–163
)
As described for
Robustagramma altifrons
except as follows.
Body length
1.2–1.6 mm
. General color yellowish to dark brown. Scutum without dorsal vittae. Face, antenna and lower frons reddish yellow to reddish brown; gena reddish brown. Frontal vitta between interfrontal plates indistinctly protuberant gradually from posterior to anterior. Interfrontal bristles in 3 or 4 pairs in addition to small interfrontal setuae. Postvertical bristles slightly shorter than occipital bristles, convergent. Eye height
ca
. 1.5 times genal height. Vibrissae and all genal bristles yellow or reddish. Arista slightly longer than head height. Distal half of palpus cylindrical. Preapical palpal bristles conspicuously reduced, distinctly shorter than maximum palpal width.
FIGURES 157–163.
Robustagramma minutiseta
sp. nov.
: 157, posterior view of male terminalia; 158, lateral view of male terminalia; 159, lateral view of male internal genitalia; 160, male sternite 5; 161, dorsal view of female terminalia; 162, ventral view of female terminalia; 163, spermathecae.
Acrostichal setulae in 4–6 irregular rows between anterior dorsocentral bristles. Wing almost clear. Length of second costal sectors
ca
. 0.48–0.55X length of third. R straight. Mid femur of male with a row of 4 ventral proximal bristles.
2+3
Male terminalia: Sternite 5 with 3 pairs of short, stout bristles on borderline between dark and pale areas. Apex of surstylus rounded in lateral view; cercus slightly shorter than surstylus, sharply curved backward near apices.
Female terminalia: Tergite 10 with only one small bristle (only
one female
specimen examined); cercus relatively long. Sternite 8 reduced to 2 long sclerites.
Holotype
(
♂
,
DEBU
)
paratype
(
1 ♂
,
DEBU
):
UNITED STATES
:
Arizona
.
Pima Co.
,
Santa
Catalina Mts, Mount Lemmon Hwy.
, 4900',
dung trap
, (no date),
A. Newton.
Other
paratypes
:
UNITED STATES
:
Arizona
.
Cochise Co.
,
Huachuca Mts
, 5600',
Sunnyside Canyon
, oak, dung,
13–19.ix.1970
,
A. Newton
(
1 ♂
,
DEBU
).
Cochise Co.
,
Chiracahua Mts
, dung,
15–21.viii.1978
,
O. Kukal
(
1 ♀
,
DEBU
)
.
Etymology: The specific epithet refers to the small preapical palpal bristles of
Robustagramma minutiseta
Cui and Marshall
,
new species