Ditomyia potomaca Fisher, 1941

Fitzgerald, Scott J., 2020, Revision of the Nearctic species of Ditomyia Winnertz and a new species from the Neotropical Region (Diptera: Ditomyiidae), Zootaxa 4859 (2), pp. 239-262 : 245-247

publication ID

https://doi.org/10.11646/zootaxa.4859.2.4

publication LSID

lsid:zoobank.org:pub:19608730-D202-4863-AF29-742F9B791732

DOI

https://doi.org/10.5281/zenodo.4538909

persistent identifier

https://treatment.plazi.org/id/03DB7A34-5203-FFB3-FF58-7C5D28B2F19C

treatment provided by

Plazi

scientific name

Ditomyia potomaca Fisher
status

 

Ditomyia potomaca Fisher

Figs. 3 View FIGURES 1–4 , 5 View FIGURES 5–6 , 19–23 View FIGURE 19 View FIGURES 20–23 , 48 View FIGURES 47–48 (Map)

Ditomyia potomaca Fisher, 1941: 278 . USA: Virginia. HT male (ANSP).

Material examined. CANADA: QUEBEC: Gatineau Park, Black Lake trail W. outflow, 24.V–7. VI .2012, waterfall MT, 45º25’57”N, 75º55’19”W GoogleMaps , J.M. Cumming & S.E. Brooks, 3 females (2 SFC, 1 CNCI) ; USA: CONNECTI- CUT: Fairfield Co., 17 May 1930, A.L. Melander 1 female (allotype) ( USNM); MAINE: York Co., West Lebanon , 29 V–11 VI 1990, D.W. Barry, MT , 1 female ( UNHC); MARYLAND: Montgomery Co., Glen Echo, 27 April, C.H. Curran, 1 female (paratype) ( USNM); MASSACHUSETTS: Middlesex Co. , Lincoln , 28–31 May 1982, E. T . Armstrong, Malaise trap, 1 female ( USNM); VIRGINIA: Fairfax Co., Holmes Run, ca. ¼ mile NE jct Gallows

Rd & I-495, 38º50’N, 77º12’W, MT GoogleMaps , 10 April–7 May 2016, D. R . Smith, 1 female ( SFC); Fauquier Co., Phoebe Hall Knipling Outdoor Lab , Bisquit Mtn. Rd., 38.8074ºN, 77.7224ºW, 11–27 April 2016, MT GoogleMaps , D. R. Smith & O.S. Flint, 1 female ( SFC); Prince William Co., Bull Run Mt. Conservancy , 38º49.484’N, 77º41.362’W, 11–27 April 2016, MT GoogleMaps , D. R. Smith & O.S. Flint, 3 males ( SFC); Prince William Co., Bull Run Mt. Conservancy , 38º49.484’N, 77º41.362’W, 28 April–19 May 2016, MT GoogleMaps , D. R. Smith & O.S. Flint, 1 male ( SFC) .

Diagnosis. The following characters will distinguish D. potomaca from other Nearctic Ditomyia : Wings hyaline ( Fig. 3 View FIGURES 1–4 ), antennal flagellomeres pale yellow (sometimes becoming light greyish-brown distally), nearly concolorous with pale yellow pedicel and scape, black spot marking base of each antennal seta strongly contrasting against yellow background color of flagellomere ( Fig. 5 View FIGURES 5–6 ), mesonotum black to very dark brown ( Figs. 5 View FIGURES 5–6 , 19 View FIGURE 19 ), male terminalia as Figs. 20–22 View FIGURES 20–23 , female terminalia as Fig. 23 View FIGURES 20–23 .

Remarks. Some specimens examined lack yellow bands on abdomen and have all coxae blackish.

Distribution ( Fig. 48 View FIGURES 47–48 ). Northeastern Nearctic; Canada (Quebec), USA (Maine, Connecticut, Maryland, Massachusetts, and Virginia).

Bionomics. Records indicate the flight period is May through early June. Immature stages and life history are unknown. Marshall (2012: 182) included a photograph of two males competing for a single female on a tree trunk (specimens listed only as Ditomyia , but it appears to be D. potomaca ).

VI

Mykotektet, National Veterinary Institute

MT

Mus. Tinro, Vladyvostok

SFC

Laboratory of Fishes

CNCI

Canadian National Collection Insects

USNM

Smithsonian Institution, National Museum of Natural History

T

Tavera, Department of Geology and Geophysics

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Ditomyiidae

Genus

Ditomyia

Loc

Ditomyia potomaca Fisher

Fitzgerald, Scott J. 2020
2020
Loc

Ditomyia potomaca

Fisher, E. 1941: 278
1941