Calycomyza orientalis Spencer, 1986

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

Calycomyza orientalis Spencer

Figs 478 , 479

Calycomyza orientalis Spencer, in Spencer and Steyskal 1986b: 301.

Description.

Wing length 2.3-2.7 mm (♂), 2.7 mm (♀). Length of ultimate section of vein M4 divided by penultimate section: 2.3-2.7. Eye height divided by gena height: 2.5-2.6. First flagellomere circular. Notum subshiny.

Chaetotaxy: Setae relatively stout, including dark brown orbital setulae. Two ori, sometimes with additional ori present anteriorly; two ors. Postocellar and ocellar setae both long, well-developed. Two well-developed dorsocentral setae, setula in front of anterior dorsocentral slightly enlarged. Six rows of acrostichal setulae. Two posteromedial setae on mid tibia.

Colouration: Setae dark brown. Head yellow with back of head, clypeus, palpus, ventral margin of gena, ocellar tubercle and antenna dark brown; frons dark brown in posterolateral corner and along orbital plate to anterior ors or slightly past level of posterior ors; with minute brown spots at base fronto-orbitals anterior to stripe; dorsal 1/2 of face brown. Thorax dark brown with postpronotum (excluding dark anteromedial spot confluent with margin), notopleuron (excluding dark elongate sublateral spot) and small anterolateral spot behind suture yellow. Halter white. Calypter margin and hairs golden yellow with margin sometimes brownish. Legs and abdomen dark brown.

Genitalia: (Figs 478 , 479 ) Epandrium and surstylus with dense patch of tubercle-like setae on inner-distal margin. Hypandrium with one seta on broadly rounded and partially membranous inner lobe. Postgonite bare. Basiphallus sclerotised dorsolaterally and anteromedially, slightly produced on left lateral margin. Hypophallus approximately as long as mesophallus, subrectangular with apex downcurved, nearly parallel-sided. Paraphallus 2/3 length of mesophallus, abruptly widened on distal 1/3, inner margin ill-defined. Mesophallus narrow, dark, subcylindrical with slight ventral curve at apex, broader and rounded at base, and slightly widening apically; small narrow floating sclerite near ventroapical margin of mesophallus. Distiphallus dark, short inner structures concealed, widest when viewed laterally with rounded apex and narrower stem (~ 2/3 width of distal part); when viewed ventrally, stem-like basal section narrowing to midpoint and distal section abruptly widened.

Host.

Unknown, but adult collected ex Rubus alleghaniensis ( Rosaceae ).

Distribution.

USA. ME, NY, TN, VA.

Type material.

Holotype: USA. VA: Mountain Lake, Giles Co., 37°21'36"N, 80°32'2"W, 1158 m, ex blossoms Rubus alleghaniensis , 28.v.1962, J.G. Chillcott, CNC1105015 (1♂ [genitalic dissection missing], CNC).

Paratypes: USA. NY: Suffolk Co., 30.v.1964, M.I. Blenderman, CNC1150956 (1♂, CNC), TN: Chapin Sanctuary, East Ridge, 9.v.1952, O. Peck, CNC1150955 (1♂, CNC), VA: Giles Co., Mountain Lake, 1158 m, 31.v.1962, J.G. Chillcott, CNC1150957 (1♂, CNC), ex blossoms Rubus alleghaniensis , 28.v.1962, CNC1150958 (1♀, CNC).

Figures

Figures 478, 479. Calycomyza orientalis Spencer, male genitalia 478 paratype, phallus, left lateral 479 holotype, phallus, left lateral (top) and left lateral (bottom) [Originally published in Spencer and Steyskal (1986 b)].