Pachyrrhiza argentata Oldroyd, 1968: 383
Webb et al. (2013: 15)
Revision of the Patagonian stiletto fly genus Pachyrrhiza Philippi (Therevidae Agapophytinae)
Irwin, Michael E.
Winterton, Shaun L.
Zootaxa
2021
2021-05-25
4975
2
273
305
6THRF
Oldroyd
Oldroyd
[151,535,735,762]
Insecta
Therevidae
Pachyrrhiza
Animalia
Diptera
4
277
Arthropoda
species
argentata
( Figs 4–8, 30A, E, 31E, 33A, 35)
Pachyrrhiza argentata Oldroyd, 1968: 383— Webb et al.(2013: 15)[catalogue].
Diagnosis. Parafacial with distinct patch of black setae adjacent to gena; hind femur with one or two subapical anteroventral macrosetae; prosternum with setae present or absent; wing mottled; male abdomen with silver velutum pubescence present; mid and hind coxal pile absent on posterior surface (rarely present on mid coxa).
Redescription. Body length: 5.0– 6.8 mm. Head with frontal pubescence light brown dorsally, silver around antennal base, dark brown band above antenna in female; parafacial with small dark patch of setae adjacent to gena; genal setae pale; male frontal vestiture consisting of patch of short setae above antenna, shorter than setae on scape; female frontal vestiture consisting of scattered dark, short to moderate length setae; occiput grey with brown pubescence; antennal scape length slightly longer than maximum width, brown, overlain with grey pubescence, numerous erect, large black macrosetae; flagellum brown with grey pubescence. Thorax with scutum pubescent grey with broken, dark brown stripes, some setal bases dark brown, two dark medial stripes anteriorly joining posteriorly, lateral stripes irregular, vestiture as numerous erect black setae, longer and denser in male; prosternum with setae present or absent medially; pleuron dark, overlain with grey pubescence; katatergite setae all white; posterior surface of mid coxa without setae, rarely with a few white setae present; femora dark brown (usually males) to dark yellow, suffused with brown-black dorsally (female), short dark setae admixed with elongate pale setae ventrally; hind femur with 1 or 2 subapical anteroventral macrosetae; tibiae yellow, dark grey-brown apically; tarsi dark yellow with apices brown; wing mottled dark infuscate, fenestrate in some cells; costal cell brown infuscate basally, yellow infuscate distally; scutal chaetotaxy (macrosetae pairs): notopleural 3, supra alar 1, post alar 1, dorsocentral 3–5, scutellar 2. Abdomen of male abdomen base colour dark brown dorsally, yellow laterally, silver velutum on tergites 2–7, male vestiture mostly elongate pale setae, denser laterally; terminalia dark yellow; female abdominal markings mostly dark brown, posterior margin pale, broader laterally, intersegmental membrane distinctly pale coloured, well defined. Male and female genitalia as per genus description except male with epandrium with dark medial stripe; aedeagus with distiphallus narrow apically.
Comments. Pachyrrhiza argentatais easily distinguished from other Pachyrrhizaspeciesby the mottled wing pattern, 1–2 subapical anteroventral macrosetae on the hind femur and male abdomen with silver velutum. It appears closely related to P. parargentata sp. n.and P. argentatoides sp. n.and while their respective distributions overlap, P. argentatais more widely distributed along the Argentinian eastern slopes of the southern Andes mountain range ( Fig. 35).
Type material. Holotypemale, ARGENTINA: Río Negro Province: San Carlos de Bariloche, San Ramon[ -41.1373, -71.2482], 22.iv.1966, [reared] pupated 14.xi.1966, emerged 8.xii.1966( NHM). Paratypes. ARGENTINA: Río Negro Province: 6 females, 2 males, same data as holotype [various dates, also reared] ( NHM). Neuquen Province: 1 male, Estancia Fortin Chacabuco[approximated as -41.0044, -71.1638], 3.iv.1966, [reared] pupated 25.xi.1966, emerged 23.xii.1966( NHM). (Types examined) Other material examined. ARGENTINA: Chubut Province: 2 females, El Maitén[ -42.0517, -71.1667], 18.XI.1966, L. Pena( MEI167328, 167352; CSCA); 1 male, Esquel[ -42.9099, -71.2849], 590 m, hand netted on walkway ( CSCA); 7 males, 4 females, Cholila, Chacra of Stephen Bussey, Malaisein steep gorge [-42.4503, -71.45], 23–31.XII.2005, M.E. Irwin, 560 m( CSCA); 2 males, 13 females, Sierra de San Berardo, 57 km W. Sarmiento[ - 45.4555, -69.682], 540 m, Malaisein small wash, 21–31.XII.2005, M.E. Irwin( CSCA); 2 males, 1 female, Parque Nacional Alerces, 530 m, Lago Futalaufquen, nr. Hosteria Quime Quipan[ -42.8611, -71.6026], 22.XII.2005, Malaise, Nothophagus, M.E. Irwin( CSCA). Mendoza Province: 1 male, 1 female, Ref. Gral. Alvarado[approximated as -32.895, -68.842], Col. Duret, 13.XII.53 ( MNHN). Rio Negro Province: 45 males, 57 females, Nahuel Huapi National Park, 2 km S. Rincon Chico, Malaise in Patagoniansteppe [ -41.0025, -71.1268], 24–31.XII.2005, M.E. Irwin, 890 m( CSCA). Neuquen Province: 2 males, Parque Nacional Lanin, 4 km E. Estancia Los Helechosat Arroyo Blanco[ -39.7836, -71.0345], Malaisein steppe prairie, 25.XII.2005– 2.I.2006, M.E. Irwin, 990 m( CSCA). 12 males, 20 females, 9 kmW. highway 23 on highway 60, Estancia Mamuil Malal Lolen[ -39.7555, -71.1248], Malaisein sand prairie, 26.XII.2005– 3.I.2006, M.E. Irwin, 890 m( CSCA); 24 females, Dept. Collon Cura, 54 kmS. La Rinconada, Malaisein dry wash [ -40.4038, -70.6538], 25–27.XII.2005, M.E. Irwin, 670 m( CSCA). CHILE: Aysén Province: 1 male, 1 female, 5.8 kmW. Chile Chico[ -46.5483, -71.8047], 450 m, 23.XI.1966, E.I. Schlinger, M.E. Irwin( MEI167363, 167323; CSCA); 7 males, 2 females, 8 kmW. Chile Chico[ -46.5517, -71.8355], 540 m, 22.XI.1966, E.I. Schlinger, M.E. Irwin( MEI167366–7, 167371, 167373–6, 167327, 167329; CSCA). Los Rios Province: 1 female, Panguipulli[approximated as -39.638, -72.335], Jan.1945( MEI167474; CSCA). Malleco Province: 1 female, Marimenuco[approximated as -38.712, -71.107], 10.XII.1959, L.E. Peña, 1100 m( MEI167460; CSCA).
3128592327
1966-04-22
1966-12-08
1966-04-22
NHM
Argentina
-41.1373
San Ramon
6
-71.2482
San Carlos de Bariloche
4
277
1
Rio Negro
holotype
3128592353
1966-04-03
1966-12-23
1966-04-03
NHM
Argentina
5
278
-41.0044
Estancia Fortin Chacabuco
6
-71.1638
San Carlos de Bariloche
4
277
9
6
3
Rio Negro
paratype
3128592308
1966-11-18
CSCA
Pena
Argentina
-42.0517
El Maiten
6
-71.1667
5
278
MEI167328, 167352
2
2
Chubut
3128592351
CSCA
Argentina
590
-42.9099
Esquel
6
-71.2849
5
278
1
1
Chubut
3128592345
2005-12-23
2005-12-31
2005-12-23
CSCA
M. E. Irwin
Argentina
Cholila
560
Malaise
Chacra of Stephen Bussey
5
278
11
4
7
Chubut
3128592303
2005-12-21
2005-12-31
2005-12-21
CSCA
W. Sarmiento & M. E. Irwin
Argentina
540
-45.4555
Malaise
39
-69.682
Sierra de San Berardo
5
278
15
13
2
Chubut
3128592306
2005-12-22
CSCA
M. E. Irwin
Argentina
Parque Nacional Alerces
530
-42.8611
Hosteria Quime Quipan
6
-71.6026
Lago Futalaufquen
5
278
3
1
2
Chubut
3128592313
MNHN
Col. Duret
Argentina
-32.895
Ref. Gral. Alvarado
72
-68.842
5
278
2
1
1
Mendoza
3128592312
2005-12-24
2005-12-31
2005-12-24
CSCA
S. Rincon Chico & Irwin
Argentina
890
-41.0025
Malaise in Patagonian
6
-71.1268
Nahuel Huapi National Park
5
278
102
57
45
Rio Negro
3128592346
2005-12-25
2006-01-02
2005-12-25
CSCA
E. Estancia Los Helechos & M. E. Irwin
Argentina
Parque Nacional Lanin
990
-39.7836
Malaise
6
-71.0345
Arroyo Blanco
5
278
2
2
Neuquen
3128592304
2005-12-26
2006-01-03
2005-12-26
CSCA
M. E. Irwin
Argentina
890
-39.7555
Malaise
6
-71.1248
Estancia Mamuil Malal Lolen
5
278
32
20
12
Neuquen
3128592335
2005-12-25
2005-12-27
2005-12-25
CSCA
Irwin
Argentina
Dept. Collon Cura
670
-40.4038
Malaise
6
-70.6538
La Rinconada
5
278
24
24
Neuquen
3128592333
1966-11-23
CSCA
Schlinger & M. E. Irwin
Chile
450
-46.5483
Chile Chico
6
-71.8047
5
278
MEI167363, 167323
2
1
1
Aysen
3128592328
1966-11-22
CSCA
Schlinger & Irwin
Chile
540
-46.5517
Chile Chico
6
-71.8355
5
278
MEI167366-7, 167371, 167373-6, 167327, 167329
9
2
7
Aysen
3128592331
1945-01
CSCA
Chile
-39.638
Panguipulli
69
-72.335
5
278
MEI167474
1
1
Los Rios
3128592316
1959-12-10
CSCA
Pena
Chile
1100
-38.712
Marimenuco
70
-71.107
5
278
MEI167460
1
1
Malleco Province