Thirteen new species of Agromyzidae (Diptera) from the United States, with new host and distribution records for 32 additional species
Author
Eiseman, Charles S.
Author
Lonsdale, Owen
0000-0001-7034-3330
onsdale@agr.gc.ca
Author
Linden, John Van Der
0000-0003-2651-0634
johnbvdl@gmail.com
Author
Feldman, Tracy S.
0000-0001-5939-6810
feldmants@sa.edu
Author
Palmer, Michael W.
0000-0003-1452-2152
mike.palmer@okstate.edu
text
Zootaxa
2021
2021-02-17
4931
1
1
68
journal article
7424
10.11646/zootaxa.4931.1.1
d63cab47-63f1-4fdc-9209-26a256c91ccb
1175-5326
4545337
88CF2B0D-E02B-46E1-9F52-1B95F717FC8F
Phytomyza notopleuralis
Spencer
(
Figs. 58
,
84
)
Material examined.
MASSACHUSETTS
:
Berkshire Co.
,
Great Barrington
,
42.197870
,
-73.335897
,
17.ix.2017
, em. ~
16.iv.2018
,
C.S. Eiseman
, ex
Cornus sericea
, #
CSE4416
,
CNC1144083–1144084
(1♁
1♀
)
.
Host. *
Cornaceae
:
Cornus sericea
L.
Leaf mine.
(
Fig. 84
) Entirely linear, on the upper leaf surface; frass in somewhat liquidy strips along the sides.
Puparium.
Shining dark brown with paler brown intersegmental boundaries; formed outside the mine.
Phenology and voltinism.
Our specimens were collected as larvae in mid-September and emerged as adults the following spring. There is presumably at least one earlier generation; the only other known specimens were collected as adults on 3 June (
Ontario
) and 9 July (
Michigan
) (
Spencer 1969
;
Spencer & Steyskal 1986
).
Distribution.
USA
: *MA, MI;
Canada
: ON (
Spencer & Steyskal 1986
).
Comments.
Neither
Spencer (1969)
nor
Spencer & Steyskal (1986)
made any statements about the possible relationships of
Phytomyza notopleuralis
to other
Phytomyza
.
Winkler
et al
. (2009)
indicated that it is near
P. spinaciae
Hendel
, a Palearctic species mining leaves of
Cynareae (Asteraceae)
and forming a white puparium within the leaf, and placed it in the
syngenesiae
group. However, the leaf mine is identical with that of
P. agromyzina
Meigen
, which feeds on various dogwoods including
Cornus sericea
, and the younger
P. notopleuralis
may eventually prove to be its junior synonym. External morphology is nearly identical, excluding the presence of a strongly pale yellow notopleuron in
P. notopleuralis
(
Fig. 58
) (yellowish tint with margins yellower in
P. agromyzina
), and the genitalia (
Spencer 1969
: Fig. 470) only differ in that the distiphallus of
P. agromyzina
is basally straight (not shallowly curved) and sometimes slightly abbreviated; the apex of the distiphallus is also sometimes a bit straighter. The phallus of
P. agromyzina
illustrated in
Spencer (1969
: Fig. 395) shows the distiphallus as a simple membranous lobe without the narrow, apically forked and medially deviated sclerotized band; this is apparently an artifact of illustration, as this structure is present in all dissected material examined at the CNC.