Calycomyza chrysopsidis Eiseman & Lonsdale & Feldman 2019, spec. nov.
Creators: name: Eiseman, Charles S.
name: Lonsdale, Owen
name: Feldman, Tracy S.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Agromyzidae
Calycomyza
Calycomyza chrysopsidis

description: Calycomyza chrysopsidis spec. nov.
(Figs. 7–8, 33–34, 64–67)
Holotype. NORTH CAROLINA: Durham Co., Durham, Leigh Farm Park, 24.v.2016, em. 8–13.vi.2016, T.S. Feldman, ex Chrysopsis mariana, # CSE2573, CNC654293 (1♂).
Paratype. NORTH CAROLINA: Durham Co., Durham, Leigh Farm Park, 10.vii.2017, em. 22.vii.2017, T.S. Feldman, ex Chrysopsis mariana, # CSE3992, CNC939774 (1♂).
Tentatively identified material. NORTH CAROLINA: Durham Co., Durham, Leigh Farm Park, 26.vi.2017, em. 29.vi.2017, T.S. Feldman, ex Chrysopsis mariana, # CSE3869 (empty puparium; adult lost).
Etymology. The specific epithet refers to the host plant, Chrysopsis (Nutt.) Elliott (Asteraceae).
Host. Asteraceae: Chrysopsis mariana (L.) Elliott.
Leaf mine. (Figs. 33–34) Upper surface, whitish, with areas of brownish discoloration; initially linear, becoming an elongate, irregular blotch, sometimes with digitate projections. The brown frass is deposited in a single lump just before pupation.
Puparium. (Fig. 8) Brown; formed within the mine adjacent to the frass lump.
Distribution. USA: NC.
Adult description. Wing length 1.8mm (♂). Female unknown. Length of ultimate section of vein M 4 divided by penultimate section: 2.3. Costa extending to M 1. Eye height divided by gena height approximately 4.3. Body in poor condition with pale residue on parts. First flagellomere rounded. Arista pubescent. Notum with faint grayish pruinosity.
Chaetotaxy: Two ors, three ori; setae decreasing in length anteriorly. Ocellar and postvertical setae subequal to ors, ocellar slightly thinner. Three dorsocentral setae with anterior seta approximately ¾ length of second seta. Six rows of acrostichal setulae. Mid tibia apparently with one lateromedial seta.
Coloration: (Fig. 7) Setae black. Head light yellow with antenna, back of head, posterolateral corner of frons to base of inner vertical, clypeus and palpus black; faint blackish pigment on orbital plate laterally to level of anterior ors, with extensions of band to reach base of setae, anteriorly continuing as very faint narrow line; frons with grayish pruinosity on dark regions. Thorax black with postpronotum (excluding large anterior spot) and notopleuron light yellow; region above alar base slightly yellowish. Calypter entirely white. Haltere white. Abdomen and legs black.
Genitalia: (Figs. 64–67) External genitalia of typical Calycomyza morphology; surstyli slightly asymmetrical, with tighter posterior clustering of tubercles on left surstylus and long regular setae present anteriorly on right surstylus. Basiphallus dominated by left sclerite, which tapers posterodorsally and widens apically in split that fuses to both halves of hypophallus, which are long, narrow and mostly parallel with apex incurved; right sclerite of basiphallus narrowly triangular with very long tapered base. Paraphallus a broad, membranous lobe with ventral band-like sclerotization that is mostly faint and ill-defined with base dark. Mesophallus swollen laterally to form circular base;? as high as long (lateral view), and over? as wide as long (ventral view). Distiphallus? length of mesophallus, entirely divided medially, dark, constricted at apex and base and enclosing internal fringed structures. Ejaculatory apodeme stout, broad, blade fan-shaped with paler apex; sperm pump with lateral lobes bearing narrow sclerotized bands that are confluent with pigmented base of duct; duct minutely annulated.
Comments. Calycomyza chrysopsidis is a relatively pruinose species (more densely covered with pruinosity than congeners considered “subshining”) with a pure white calypter, entirely black legs and a stripe on the orbital plate that is relatively wide to the level of the anterior ors and very narrow beyond. The general structure of the phallus is similar to that of C. promissa (Frick), having a short, medially split distiphallus and no ventrobasal process on the mesophallus, but the strongly swollen mesophallus is distinct, with the basal half broadly subcircular in outline when viewed ventrally.
Chrysopsis is a new host genus for Agromyzidae.
description: Published as part of Eiseman, Charles S., Lonsdale, Owen & Feldman, Tracy S., 2019, Nine new species of Agromyzidae from North Carolina, USA, with new host and distribution records for additional species, pp. 301-333 in Zootaxa 4571 (3) on pages 306-307, DOI: 10.11646/zootaxa.4571.3.1, http://zenodo.org/record/2612611