Cerodontha (Dizygomyza) magnicornis (Loew)

Eiseman, Charles S. & Lonsdale, Owen, 2019, New State and Host Records for Agromyzidae (Diptera) in the United States, with the Description of Ten New Species, Zootaxa 4661 (1), pp. 1-39: 10

publication ID

https://doi.org/10.11646/zootaxa.4661.1.1

publication LSID

lsid:zoobank.org:pub:8DF7EC6E-ECF2-4819-979E-0E26BDDC2B21

persistent identifier

http://treatment.plazi.org/id/2A7A4D79-3524-FFA6-14C5-FC77FD3AF993

treatment provided by

Plazi

scientific name

Cerodontha (Dizygomyza) magnicornis (Loew)
status

 

Cerodontha (Dizygomyza) magnicornis (Loew)  

( Fig. 12 View FIGURES 6–13 )

Material examined. IOWA: Winneshiek Co., Fern Hollow , 31.v.2017, em. 10.vi.2017, J. van der Linden, ex Carex   (section Laxiflorae), #CSE3882, CNC940120 View Materials (1³)   ; OKLAHOMA: Payne Co., Mehan , 36.014339° N, - 96.996744° W, 20.iv.2017, em. 1.v.2017, M.W. Palmer, ex Carex festucacea   , #CSE3608, CNC939888 View Materials (1♀) GoogleMaps   .

Hosts. * Cyperaceae   : Carex   sp. (section Laxiflorae), C. festucacea Schkuhr ex Willd. Foote (2004)   swept an adult from C. lacustris Willd.  

Leaf mine. Elongate, whitish to greenish, with the dark frass deposited in a single large lump.

Puparium. Brown; formed within the mine, toward the leaf base from the frass lump.

Distribution. USA: CO, DC ( Frick 1959), * IA, IL, IN, MI, NH, OH ( Foote 2004), * OK, PA, TN. Frick’s (1959) record from Canada: BC requires confirmation. Spencer (1969) treated this species as a synonym of C. (D.) morosa (Meigen)   , and it is unclear to which species his records from ON and QC refer.

Comments. This species has not been reared previously. The leaf mine appears to be indistinguishable from that of the closely related C. (D.) morosa   , which also feeds on Carex   spp. Adults of these two species are readily differentiated, with C. magnicornis   ( Fig. 12 View FIGURES 6–13 ) having shoulders that are distinctly light yellow to whitish (not gray or with slight yellowish tint) and femora that are all distinctly light yellow apically (similar in some C. morosa   , but apices of mid and hind femora usually much darker). The phallus of C. magnicornis   ( Spencer & Steyskal 1986: Fig. 595) is also much shorter and more shallowly curved.

CO

Museum National d'Histoire Naturelle

IA

University of Iowa

MI

Università degli Studi di Milano

NH

South African National Biodiversity Institute

OH

Agricultural Museum of Praha

PA

Universidade Federal do Oeste do Pará

BC

Institut Botànic de Barcelona

ON

Natural History Museum

QC

National Museum of Natural History, Bulawayo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Agromyzidae

Genus

Cerodontha