Phytomyza winkleri, Lonsdale, 2021

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/684853B2-EB34-48F6-AA37-F8BF3930CBE7

taxon LSID

lsid:zoobank.org:act:684853B2-EB34-48F6-AA37-F8BF3930CBE7

treatment provided by

ZooKeys by Pensoft

scientific name

Phytomyza winkleri
status

sp. nov.

Phytomyza winkleri sp. nov.

Figs 828-832 View Figures 828–832

Description.

Wing length 1.8 mm (♂). Female unknown. Vein dm-m absent. Eye height divided by gena height: 3.7. First flagellomere relatively large, 1/3 height of eye, slightly longer than high, hairs along distal margin slightly longer. Ocellar triangle not much larger than tubercle and rounded. Parafacial projecting, slightly narrower than cheek; fronto-orbital plate slightly projecting medially, becoming more pronounced anteriorly.

Chaetotaxy: One ori; two ors; all subequal. Ocellar seta slightly longer than fronto-orbitals, postocellar more so. Few orbital setulae. Four dorsocentrals, one presutural, slightly decreasing in height anteriorly. Acrostichal setulae irregular and few, variably appearing in two to four rows around and slightly posterior to suture. Few intra-alar setulae around suture.

Colouration: Head partially yellow, with antenna black, back of head, ocellar triangle (barely larger than tubercle) and ventral margin of gena dark brown; palpus and clypeus brown; posterolateral corner of frons dark brown to base of inner vertical seta, dark spot continuing anteriorly along fronto-orbital plate to disappear between bases of ors. Thorax dark brown with grey pruinosity that is denser dorsally; pruinosity also seen more thinly across remainder of body, especially along dark lateral regions of frons. Halter white. Calypter margin and hairs brownish. Legs mostly dark brown; coxae brownish, fore coxa dark towards base; apex of femora and bases of tibiae yellow. Abdomen dark brown.

Genitalia: Epandrium shallow, long setose posteriorly, completely fused to small surstylus. Postgonite broad and flat with large distoventral lobe and fused to hypandrium. Dorsal margin of phallophorus fused to single apically split basiphallus. Paraphallus originating slightly beyond apices of basiphallus, converging and becoming more plate-like apically; broken medially. Mesophallus not evident. Distiphallus pale and cylindrical, narrower at base, dark apically and weakly pigmented dorsally. Ejaculatory apodeme with small pale blade and broad base.

Host.

Unknown.

Distribution.

USA: MD.

Etymology.

The specific epithet recognises the collector of the holotype, I. Winkler, who provided the specimen to the author after recognising it to be an undescribed species.

Type material.

Holotype: USA. MD: Montgomery Co., Pautuxent State Park, below Brighton dam, W. of Columbia, 39°11.39'N, 77°0.29'W, 8.v.2005 IS Winkler (1♂, USNM).

Comments.

The phallus of Phytomyza winkleri superficially suggests a close association to species of the subgenus Napomyza , but unlike many members of this subgenus, vein dm-m is absent, making it more similar in appearance to other Phytomyza s. s. While its position within the genus is still unclear, a relationship to P. avicursa is suggested in the structure of the hypandrial complex, mostly in the dorsal position of the split basiphallus and the long perpendicular paraphallus. Both are further characterised by a dark, grey pruinose notum, dark legs with yellowish knees, a black antenna with the first flagellomere relatively large and one ori (two present on one side in the P. avicursa type).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Phytomyzinae

Genus

Phytomyza