Establishment of the Microphorella breviradia species group, with a key to the Nearctic species groups of Microphorella Becker (Diptera: Dolichopodidae sensu lato: Parathalassiinae)
Author
Cumming, Jeffrey M.
0000-0002-3619-3700
Diptera Unit, Canadian National Collection of Insects, Agriculture and Agri-Food Canada, K. W. Neatby Building, 960 Carling Avenue, Ottawa, Ontario, K 1 A 0 C 6, CANADA & jeff. cumming @ agr. gc. ca; https: // orcid. org / 0000 - 0002 - 3619 - 3700
jeff.cumming@agr.gc.ca
Author
Brooks, Scott E.
0000-0001-7915-1941
Diptera Unit, Canadian National Collection of Insects, Agriculture and Agri-Food Canada, K. W. Neatby Building, 960 Carling Avenue, Ottawa, Ontario, K 1 A 0 C 6, CANADA & scott. brooks @ agr. gc. ca; https: // orcid. org / 0000 - 0001 - 7915 - 1941
scott.brooks@agr.gc.ca
text
Zootaxa
2022
2022-05-10
5134
2
197
214
journal article
55594
10.11646/zootaxa.5134.2.2
47c35b15-3b64-4e49-8373-88d397136aeb
1175-5326
6536905
1D9EF14F-BFAA-45A4-B727-7CAFC55778FE
Microphorella macdonaldi
sp. nov.
(
Figs 5
,
23
)
urn:lsid:zoobank.org:act:
07E499E7-A2B0-4A7F-A129-9F3B486D583F
Type material.
HOLOTYPE
,
♂
labelled: “
CA
.Huntington L. [ca.
37°13ʹN
119°14ʹW
]/ Kaiser C.
2700m
/
Fresno Co.
17.VIII/
J. MacDonald
1984”; “84-0079”; “
Microphorella
/ ornatipes/
Det. J.F. MacDonald
”; “
HOLOTYPE
/
Microphorella macdonaldi
/ Cumming & Brooks [red label]” (
CNC
)
.
PARATYPES
:
USA
:
California
:
Same
data as holotype (
1♀
,
CNC
)
;
same data as holotype except,
Rancheria C.
,
2600m
,
20.viii.1984
(
1♀
,
CNC
)
;
same data as holotype except,
Midge C.
,
2200m
,
13.viii.1984
(
1♀
,
CNC
)
;
Bolsillo Creek
at
Bolsillo Campground
,
SW of Mono Hot Springs
,
2270 m
,
8.viii.1975
,
Paul H. Arnaud, Jr.
(
1♂
,
2♀
,
CAS
)
;
Madera County
:
Chiquito Creek
,
0.25 mi
below Upper Chiquito Campground
,
6820 ft
,
11.viii.1971
,
Hugh B. Leech
(
2♂
,
CAS
)
.
FIGURES 1–5.
Microphorella breviradia
sp. nov.
and
M. macdonaldi
sp. nov.
(males).
1.
Habitus of
M. breviradia
sp. nov.
, left lateral view.
2.
Head of
M. breviradia
sp. nov.
, anterior view (
CNC
487231).
3.
Wing of
M. breviradia
sp. nov.
, anterior view (
CNC
487241).
4.
Abdomen of
M. breviradia
sp. nov.
, right lateral view (
CNC
1155716).
5.
Head of
M. macdonaldi
sp.
nov.
, anterior view (
holotype
). Abbreviations: bm-m—basal medial crossvein; cua—anterior cubital (=anal) cell; CuA+CuP— anterior branch of cubital vein + posterior branch of cubital vein; dm—discal medial cell; dm-m—discal medial crossvein; epand—epandrium; h—humeral crossvein; M
1
, M
2
, M
4
—medial veins; (
R
)—right;
R
1
,
R
2+3
,
R
4+5
—radial veins; Sc—subcostal vein; v epand proc—ventral epandrial process.
FIGURES 6–9.
Collection localities and habitats of the
Microphorella breviradia
species group.
6–7.
South Fork of American River (Eagle Rock), California,
M. breviradia
sp. nov.
type locality (first author pictured in Fig. 7).
8–9.
West Fork of Patrick Creek, California,
M. vespera
sp. nov.
type locality.
Diagnosis.
Males of
M
.
macdonaldi
sp. nov.
are distinguished by their broad face (
Fig. 5
) and long dorsal setae on fore tarsomere 5, in contrast to males of
M
.
breviradia
sp. nov.
and
M
.
vespera
sp. nov.
, which both have a narrow face (as in
Fig. 2
) and shorter dorsal setae on fore tarsomere 5. The hypopygial morphology of
M
.
macdonaldi
sp. nov.
is similar to some specimens of
M
.
breviradia
sp. nov.
(see
Figs 10, 11
). Females of
M
.
macdonaldi
sp. nov.
appear to be indistinguishable from those of
M
.
breviradia
sp. nov.
and
M
.
vespera
sp. nov.
Description. Male
(
Fig. 5
): Body length
1.40–1.43 mm
, wing length
1.67–1.78 mm
. Similar to
M. breviradia
sp. nov.
except as follows:
Head
(
Fig. 5
): Slightly broader than high in anterior view, not wider in occasional specimens. Face broader, nearly twice width of anterior ocellus at narrowest point in middle. Antenna with postpedicel slightly shorter, about 2X longer than wide, conical and gradually tapered distally; arista-like stylus slightly longer, about 2X length of postpedicel.
Thorax:
Dorsum and pleura with brighter metallic blue-grey coloration, dorsum with reduced greenish-bronze region posteriorly.
Legs:
Femora and tibiae dark grey-brown.
Foreleg
: Tarsomere 5 slightly larger, with tuft of longer dorsal setae.
Hindleg
: Femur with series of ventral setae pale, as long as femur width; tibia straight, without erect setae; tarsus slightly shorter than tibia (>0.7X tibia length).
Abdomen:
Dark brown with bluish grey tinge.
Hypopygium
: Right epandrial lamella with anterior end slightly projected. Dorsal lobe of right surstylus with 2 basiventral projections and 3 strong marginal setae on ventral margin (similar to
Fig. 11
). Right cercus with apex narrow (similar to
Fig. 14
).
Female:
Body length
1.38–1.49 mm
, wing length
1.73–1.79 mm
. Similar to male except as follows:
Head:
Face more linear, not narrowed in middle.
Thorax:
Dorsum mostly dull greenish-bronze.
Legs:
Foreleg
: Tarsomere 5 smaller with fewer dorsal setae.
Hindleg
: Femur with short indistinct setae ventrally.
Abdomen:
Similar to
M. breviradia
sp. nov.
Distribution.
This new species is known from the Sierra
Nevada
Mountains in central
California
,
USA
(
Fig. 23
).
FIGURES 10–15.
Hypopygium of
Microphorella breviradia
sp. nov.
10.
Hypopygium, left lateral view (CNC
DIPTERA
# 192173).
11.
Hypopygium, right lateral view (CNC
DIPTERA
# 192173).
12.
Right epandrial lamella, right lateral view (CNC
DIPTERA
# 192167).
13.
Right epandrial lamella, right lateral view (CNC487206).
14.
Hypopygium and sternite 8, dorsal view (CNC
DIPTERA
# 192173).
15.
Right cercus, dorsal view (CNC487206). Abbreviations: cerc—cercus; d sur—dorsal lobe of surstylus; epand—epandrium; hypd—hypandrium; hyprct—hypoproct; (L)—left; pgt lb—postgonite lobe; ph—phallus; (R)—right; v epand proc—ventral epandrial process; v sur—ventral lobe of surstylus.
FIGURES 16–18.
Female terminalia of
Microphorella breviradia
sp. nov.
16.
Terminalia, dorsal view (CNC487214).
17.
Terminalia, lateral view (CNC487214).
18.
Spermatheca, lateral view (CNC487218). Abbreviations: cerc—cercus; st—sternite; tg—tergite.
Etymology.
This species is named after the late John F. MacDonald of Purdue University, West Lafayette,
Indiana
. John was primarily a specialist on Hemerodromiinae, who collected many other valuable Empidoidea, including much of the
type
series of this new species. His empidoid collection now resides in the CNC.
Remarks.
No barcode sequences were obtained from the small number of specimens known for this species. The width of the male face in
M
.
macdonaldi
is relatively broad compared with the narrower face of males of
M
.
breviradia
or
M
.
vespera
, resembling the wider face found in
M
.
breviradia
species group females. Although a broader face is one of the demasculinization features described by
Runyon (2022)
for nematode infected
Dolichopodidae
, it does not appear to be the case for males of
M
.
macdonaldi
, which show no signs of nematode infection.