Phytomyza bicolor Coquillett, 1902

Lonsdale, Owen, 2021, Manual of North American Agromyzidae (Diptera, Schizophora), with revision of the fauna of the " Delmarva " states, ZooKeys 1051, pp. 1-481 : 1

publication ID

https://dx.doi.org/10.3897/zookeys.1051.64603

publication LSID

lsid:zoobank.org:pub:639E252D-4392-4ABB-910B-CEA5D8AD2487

persistent identifier

https://treatment.plazi.org/id/4BEA88BB-A4B6-E14F-EC67-8A45EC4AF73A

treatment provided by

ZooKeys by Pensoft

scientific name

Phytomyza bicolor Coquillett
status

 

Phytomyza bicolor Coquillett

Figs 138 View Figures 131–138 , 748-750 View Figures 748–750

Phytomyza bicolor Coquillett, 1902: 191. Frick 1959: 426; Spencer and Steyskal 1986b: 203.

Description

(Fig. 138 View Figures 131–138 ). Wing length 3.2-3.5 mm (♂), 3.4-3.8 (♀). Vein dm-m absent. Eye height divided by gena height: 2.1-2.8. Eye relatively small and round; parafacial and fronto-orbital plate produced dorsally, visible laterally. Labellum relatively long and pointed. With faint brown pruinosity that is denser dorsally on head and thorax.

Chaetotaxy: Two to four ori; two ors (anterior seta inset). Ocellar and postocellar setae exceeding length of ors. Four dorsocentrals, one presutural, decreasing in height anteriorly. Up to six scattered rows of acrostichal setulae, strongly reduced in number posterior to second dorsocentral.

Colouration: Head light brown to yellowish with palpus brown, ocellar tubercle, posterior margin of frons, lateral margin of frons (stripe barely touching base of fronto-orbitals, disappearing anteriorly), clypeus, venter of gena, face, first flagellomere, lunule (at least widely above antennal bases) and back of head dark brown; gena and frons sometimes browner. Thorax dark brown with postpronotum and notopleuron sometimes reddish. Calypter white with hairs dark brown. Halter white. Legs dark brown. Female abdomen yellow with oviscape dark brown and anterior margin of tergite 6 (and sometimes 4 and 5) brownish; male abdomen as described for female except tergite six, sternite 8 and epandrium brownish; sometimes abdomen brown past tergite 3 or anterior 1/2 of tergite 3 brown and tergites 1 and 2 brownish, but posterior margins of tergites 2-5 always yellow.

Genitalia: (Figs 748-750 View Figures 748–750 ) Inner lobe of hypandrium with separate, elongate medial process. Postgonite well-developed. Basiphallus halves narrow, flat, dorsal, left sclerite longer and fused to phallophorus. Hypophallus membranous. Paraphalli dark, narrow, converging to base of distiphallus; wider and paler basally. Mesophallus short, pigmented, slightly wider than duct, widening to distiphallus. Distiphallus made up of one pair of dark, very narrow tubules that diverge basally and are nearly parallel on distal 1/2. Ejaculatory apodeme very small with distal 1/2 of blade pale to clear; sperm pump with small, sclerotised patch.

Host.

Unknown - adult ON female photographed on Caltha palustris ( Ranunculaceae ).

Distribution.

Canada. ON*. USA. CT*, IN, NY, TN*, VA.

Type material.

Holotype: USA. NY: Niagra Falls, 23.vi (1♀, USNM, type No. 6663).

Additional material examined.

Canada. ON: Spring Creek , 10.vi.2007 [1♀, photo voucher by S.A. Marshall] . USA. CT: Stanford , 18.v.1919, A.H. Sturtevant (2♂ 1♀, USNM), NY: Ithaca, 3.vi.1917, S.H. Emerson (1♂, USNM), Ithaca, 11.vi.1935, H.K. Townes (1♀, USNM), Remus Pt., Chautauqua Lake , 31.v.1963, swampy woods, W.W. Wirth (2♂, USNM), Allegany State Park , 28.v-3.v.1963, stream margin, W.W. Wirth (1♀, USNM), TN: Sevier Co., Rte. 441, 3mi NW NC/TN border, Great Smokey Mtn. N.P., 35°38.3'N, 83°27.8'W, 4500', 27.v.1999, S.D. Gaimari (1♀, USNM), VA: Shenandoah , Big Meadows , 15.vi.1941, A.L. Melander (3♂, USNM), Fairfax Co. , Turkey Run Park , nr. Mouth of Turkey Run , 38°57.9'N, 7°09.4'W, Malaise trap, 18-30.v.2007, D.R. Smith (1♀, USNM), Smyth Co. , Mt. Rodgers, 1432-1615 m, 1.v.1962, J.R. Vockeroth, CNC480074 (1♀, CNC) GoogleMaps .

Comments.

The pale abdominal tergites of Phytomyza bicolor are highly diagnostic, making this species easy to identify externally. The photo voucher included here (Fig. 138 View Figures 131–138 ) is the first record of this species in Canada.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Phytomyzinae

Genus

Phytomyza

Loc

Phytomyza bicolor Coquillett

Lonsdale, Owen 2021
2021
Loc

Phytomyza bicolor

Coquillett 1902
1902