Cerodontha (Dizygomyza) morosa (Meigen)

Eiseman, Charles S., Lonsdale, Owen, Linden, John Van Der, Feldman, Tracy S. & Palmer, Michael W., 2021, Thirteen new species of Agromyzidae (Diptera) from the United States, with new host and distribution records for 32 additional species, Zootaxa 4931 (1), pp. 1-68 : 22

Cerodontha (Dizygomyza) morosa (Meigen)

Material examined. OKLAHOMA: Payne Co., Mehan , 36.013839°, -96.998103°, 20.xii.2017, em. 12.ii.2018, M.W. Palmer, ex Carex amphibola , # CSE4377 , CNC1135648 (1♀)

Hosts. Cyperaceae : [ Carex * amphibola Steud. , C. festucacea Willd. ], C. gracillima Schwein. , C. hitchcockiana Dewey , C. leptonervia (Fernald) Fernald ( Eiseman & Lonsdale 2018) .

Leaf mine. A long, whitish corridor, changing direction a few times, with frass in a single blackish lump toward the leaf apex.

Puparium. Yellowish or reddish to blackish-brown; formed within the mine, glued to the floor toward the base of the leaf.

Phenology and voltinism. In Massachusetts, Cerodontha morosa has been reared in late June and early July from leaf mines collected in June. In Oklahoma, tentatively identified females have been reared from overwintering pupae, and from mines collected in early and late May with adults emerging in early May and early June ( Eiseman & Lonsdale 2018).

Distribution. USA: CA, MA, MO ( Spencer 1981), [OK]; records from IL, IN, MD, MI ( Priest et al. 2020), and SD require verification; Europe ( Eiseman & Lonsdale 2018). The Montana record given by Spencer & Steyskal (1986) and repeated by Eiseman & Lonsdale (2018) was evidently an erroneous substitution for the Missouri record given by Spencer (1981).

Comments. This is the first record of an agromyzid from Carex amphibola .