Review of Campsicnemus (Diptera: Dolichopodidae) of the Marquesas, French Polynesia, with description of four new species groups
Author
Evenhuis, Neal L.
text
Zootaxa
2009
2004
25
48
journal article
48625
10.5281/zenodo.185641
59926166-687d-44cd-b53d-ead63b598ac4
1175-5326
185641
Campsicnemus
ee
Evenhuis, new species
(
Figs. 22
,
24
)
Diagnosis.
Distinguished from other members of the
aa
group by the strong apical seat on the hook-like process of the fore tibia and the strong long black setae on the swollen medial area of the ventral surface of the fore tibia.
Description
.
Male
. Body length:
3.2 mm
. Wing length:
2.6 mm
.
Head
. Black, face dark brown to black with reddish highlights, dark brown near clypeus; oc and vt black, about one-third length of antennal arista; front, occiput, and vertex black with blue highlights; face constricted at middle, almost holoptic, eyes separated below antennae by width of 1–2 ommatidia; palp small, dark brown; proboscis brown, extending slightly below eye in lateral view; scape and pedicel dark brown; postpedicel brown, short, conical, length subequal to width; arista slightly longer than head height.
Thorax
: Mesoscutum, scutellum, and pleura dark brown to brown throughout, with a few metallic bluish highlights dorsolaterally; thoracic setae black: 1 + 3 dc; 2 np; 2 ph; 1 pa; 1 + 1 sc; ac absent; halter stem and knob white.
Legs
: CI yellowish, CII and CIII brown; FI and FII yellowish brown, FIII yellowish brown basally, becoming darker brown on apical one-fourth; remainder of legs yellowish brown; FII with 2 strong black setae, one medially on ventral surface, one on apical one-third of ventral surface, remainder of femora unmodified, without MSSC; TiI (
Fig. 22
) slightly thicker just beyond middle on ventral surface, with large hook-like process apically, length of hook-like process subequal to width of tibia, swollen area with 4 long, strong, stiff setae, apical hook-like process (
Fig. 24
) with dense tibial comb (pecten) and bearing strong stiff black seta at tip (MSSC), remainder of foreleg unmodified; TiII slightly bowed and swollen, with long seta medially on dorsal surface and one subapically (MSSC). IIt1 about one-half length of Iit2, with 2 long black curved setae laterally, their length subequal to IIt2, and with dense wavy setae on mesal surface; Iit2 with row of long wavy setae on mesal surface, length subequal to segment. Remainder of leg segments without MSSC.
Wing
: pale smoky throughout; posterior crossvein perpendicular to vein M.
Abdomen
. Brown, dark brown along posterior margin, with short black hairs dorsally on each tergite, a few longer hairs laterally; sternites yellowish brown. Hypopygium dark brown with brown cerci, not dissected.
Female
. As in male except for lack of MSSC; postpedicel length about 1.5 x width; legs normal, without modifications.
Types
.
Holotype
ɗ (BPBM
Type
16,629) [BPBM1013140] and 2Ψ
paratypes
[BPBM1013141] from
FRENCH POLYNESIA
:
Marquesas
: UA POU: Anakooma River,
1300 ft
[
396 m
], cascade, sweep wall,
19 Aug 2001
, R.A. Englund.
Other
paratype
:
FRENCH POLYNESIA
:
Marquesas
: U A P OU: 1ɗ [BPBM1013142], Paeoa River,
1150–1500 ft
[
350–457 m
],
17 Aug 2001
, pools/cascades, R.A. Englund.
Holotype
and
paratypes
in BPBM.
Etymology
. The specific epithet derives from the Marquesan
‘e‘e
= “disappeared”; referring to the relative cryptic nature of the species, only being found in samples after collection of a number of flies from the same locality. The name is treated as a noun in apposition.