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
Robusatgramma grenadense
Cui and Marshall
,
new species
(
Figs. 207–213
)
As described for
Robustagramma biangulatum
except as follows.
Body length
1.3–1.9 mm
. Postvertical bristles slightly divergent,
ca
. 2/3 as long as inner occipital bristle. Postocellar bristles cruciate, over half as long as postvertical bristle. Head height
ca
. 2.8–3.1 times genal height. Preapical palpal bristles
ca
. 2.5 times as long as maximum palpal width. One pair of presutural dorsocentral setulae distinctly longer than acrostichal setulae inside. Posterodorsal katepisternal bristle over 4/5 as long as distance between bristle base and wing base. Wing pigmented, but maculation indistinct. Length of second costal sector
ca
. 0.46–0.48X length of third. Mid femur of male with 8–10 proximal ventral bristles and a distinct row of anteroventral setulae.
Male terminalia: Sternite 5 with two (rarely three) pairs of short, stout bristles. Surstylus with a truncate apex in lateral view. Cercus distinctly longer than surstylus, with distal half narrow in posterior view. Dorsal whiplike sclerite of distiphallus with a small nodule. Ejaculatory apodeme slightly shorter than half length of aedeagal apodeme.
Female terminalia: Two sclerites of sternite 8 indistinct. Tergite 10 with two small bristles, without a posteromedial patch of small setulae. Spermathecae with distal portions similar in length to basal portions. Ducts of paired spermathecae
ca
. 2.5 times as long as spermatheca.
Holotype
(
♂
,
DEBU
) and
paratypes
(
5 ♂
,
10 ♀
,
DEBU
):
GRENADA
:
St. George
,
Grand Etang Forest
,
12 05 N
,
61 42 W
,
460m
,
dung traps
,
7–8.x.1995
,
B. D. Gill.
Other
paratypes
:
GRENADA
:
Grand Etang Rain Forest
,
3.i.1995
(
1 ♂
,
DEBU
)
;
dung traps
,
1–4.i.1995
(
1 ♀
,
DEBU
)
,
S. A.
Marshall.
Mt.
Qua Qua
,
Grand Etang
,
3.i.1995
,
S. A. Marshall
(
1 ♀
,
DEBU
)
.