Phytomyza compta (Spencer)

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/7ED1BB54-0B95-398A-9E18-103FA92382C7

treatment provided by

ZooKeys by Pensoft

scientific name

Phytomyza compta (Spencer)
status

 

Phytomyza compta (Spencer)

Figs 132 View Figures 131–138 , 763-765 View Figures 760–765

Chromatomyia compta Spencer in Spencer and Steyskal 1986b: 324.

Phytomyza compta . Winkler et al., 2009: 290.

Description

(Fig. 132 View Figures 131–138 ). Wing length 2.9-3.3 mm (♂), 3.0-3.8 mm (♀). Vein dm-m absent. Eye height divided by gena height: 2.7-3.3. Hairs on first flagellomere long, bushy; segment rounded, longer than high, narrowing or wider apically, sometimes appearing subrectangular. Cheek distinct.

Chaetotaxy: Two ori with anterior seta shorter and much thinner (not more than 3/5 length posterior ori), sometimes absent on one side; two ors. Two rows of acrostichal setulae. Four subequal dorsocentral setae. Smaller medial presutural supra-alar present.

Colouration: Overall colour yellow, more faintly greyish on pleuron; greyish pruinosity evident on pigmented regions, densest dorsally on thorax. Lunule, fronto-orbital plate and posterolateral corner of frons light yellow; ocellar tubercle brown medially with extensions to ocelli; frons posterior to postocellar yellow; back of head brown above foramen; first flagellomere black; palpus brown with base variably yellow. Scutum dark brown with postpronotum, notopleuron, anterior margin beside postpronotum to dorsocentral row, lateral and posterolateral margins to corner of scutellum yellow; sometimes with regions anterior to scutellum between dorsocentrals yellowish; if posteromedial region more clearly yellow, then pattern partially vittate, with posterolateral supra-alar stripe partially differentiated and with nearly indistinct yellow line along dorsocentral row, thereby appearing as a more widely infuscated P. clematiphaga . Scutellum yellow with brownish lateral and anteromedial spots. Pleuron yellow with faded brownish anteroventral stripe on anepisternum sometimes evident, meron brown ventrally, katepisternum with large spot not reaching base of seta, and anepimeron sometimes with brownish mottling. Mediotergite dark brown, anatergite brown, katatergite yellow with posteroventral corner brown. Halter white. Calypter white with hairs brown. Tibiae brown to brownish yellow and tarsi brown. Male abdomen yellow; female abdomen brownish dorsally or with reduced pigment medially on tergites 1 and 2 and anteriorly on tergites 3-5; oviscape brown laterally, posteriorly, and sometimes dorsally, but always yellowish or with yellow mottling.

Genitalia: (Figs 763-765 View Figures 760–765 ) Hypandrium short, stout and broadly rounded with narrower, projecting apex; inner lobe with two setae and haired membranous extension. Postgonite broad and relatively flat with one outer seta. Halves of basiphallus narrow, interlocking at base, with dorsal subapical extension nearly reaching paraphallus, and with small, pale ventroapical extension. Hypophallus U-shaped with arms subparallel; basally with tubular membranous chamber with one pair of ill-defined sclerotised strips flanking it where it differentiates into a free, upcurved flagellum. Paraphalli dark, ~ 3 × longer than wide, connected by membrane along venter, covering base of distiphallus; angled dorsally. Ejaculatory duct sclerotised subapically, meeting small, ill-defined, and enclosed mesophallus. Distiphallus entirely split into one pair of diverging tubules ca. as long as hypophallus that are angled towards base of phallus; tubules sclerotised on distal 1/2, but with slightly longer sclerotised ventral extension basally; single rod-like sclerite floating between arms of distiphallus. Ejaculatory apodeme large, clear to blade margin and with venter of sperm pump dark.

Host.

Unknown - possibly Clematis ( Spencer and Steyskal 1986b).

Distribution.

Canada: ON*. USA: ME*, NC, NY*, TN, VA, WA*.

Type material.

Holotype: USA. NC: Swain Co., Great Smoky Mts. N.P., Clingman’s Dome, 6300-6642ft, 20.v.1957, J.R. Vockeroth (1♂, CNC).

Paratypes examined.

USA. NC: Gr. Sm. Mt. Nat. Park, Clingman’s Dome, 6.viii.1957, C.J. Durden, CNC480088 (1♀, CNC), Gr. Sm. Mt. Nat. Park, Tenn., Clingman’s Dome, 2011 m, 22.viii.1957, J.G. Chillcott, CNC480085 (1♂, CNC), 2026 m, 21.v.1965, CNC480089 (1♀, CNC), Gr. Smoky Mt. Nat. Park, Clingman’s Dome, 1920-2024 m, 28.v.1957, J.R. Vockeroth, CNC480092 (1♀, CNC), 20.v.1957, CNC480091 (1♀, CNC), 28.v.1957, CNC480084 (1♂, CNC), Mt. Mitchell, 2072 m, 12.viii.1957, J.G. Chillcott, CNC480083 (1♂, CNC), Mt. Richland-Balsam, Blue Ridge Pkwy, 1828-1950 m, 30.v.1965, J.G. Chillcott, CNC480087 (1♀, CNC), TN: Gr. Smoky Mt. Nat. Pk., Indian Gap, 1584 m, 28.v.1957, J.R. Vockeroth, CNC480090 (1♀, CNC), VA: Hawksbill, Shenandoah N.P., 1097-1234 m, 7.vi.1962, J.R. Vockeroth, CNC480080-480082 (2♂1♀, CNC), Smyth Co., Mt. Rogers, 1615-1737 m, 1.vi.1962, J.R. Vockeroth, CNC480086 (1♂, CNC).

Additional material examined.

Canada. ON: Thornhill , 30.v.1964, J.R. Vockeroth, CNC480079 (1♀, CNC) . USA. ME: Belfast , 16-20.ix.1946, C.W. Sabrosky (1♀, USNM), NY: Slide Mt., 25.viii.1935, 4200', H.K. Townes (1♂ 4♀, USNM), WA: Mt. Rainier, VanTrump Crk., 2.ix.1917, A.L. Melander (1♀, USNM) .

Comments.

Phytomyza compta is a large species with a characteristically pale body (also see comments for P. clematiphaga ). The first flagellomere is also fringed with relatively long hairs and the phallus is unusual: the paraphalli form a single rounded bar, and the two dark arms of the distiphallus are separate from each other and bent posterodorsally. The latter character likely caused this species to be initially classified in the genus Chromatomyia , but it does not appear to be related to any of the other lineages of this synonymized genus.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Phytomyzinae

Genus

Phytomyza

Loc

Phytomyza compta (Spencer)

Lonsdale, Owen 2021
2021
Loc

Chromatomyia compta

Spencer 1986
1986