Saltbush-associated Asphondylia species (Diptera: Cecidomyiidae) in the Mediterranean Basin and their chalcidoid parasitoids (Hymenoptera: Chalcidoidea)
Author
Dorchin, Netta
Department of Zoology and Zoological Museum, Tel Aviv University, Tel Aviv, 69978 Israel. E-mail: ndorchin @ post. tau. ac. il Institute of Earth Systems, Division of Rural Sciences and Food Systems, University of Malta, Msida MSD 2080, Malta.
Author
Mifsud, David
Author
Askew, Richard
5 Beeston Hall Mews, Brook Lane, Beeston, Tarporley, Cheshire, CW 6 9 TZ, UK. E-mail: olynx @ btinternet. com
text
Zootaxa
2014
2014-10-02
3869
4
383
396
journal article
5325
10.11646/zootaxa.3869.4.3
1c47f462-90bf-4b94-ba14-6ac0f08050fc
1175-5326
4947313
3C5EC936-DD36-4CE7-9B4C-452FA7BBE519
Asphondylia scopuli
Dorchin & Mifsud
,
n. sp.
Gall and biology.
This species induces fleshy, spherical bud galls,
4–5 mm
in diameter, in leaf axils of
Atriplex lanfrancoi
(
Figs. 6–7
). The galls are green to pinkish and covered by whitish fuzz similar to ungalled plant parts. Each gall contains a single larval chamber, the inside walls of which are lined by white mycelia. The species is apparently univoltine, with adults emerging in May. Larvae are heavily parasitized by numerous species of parasitic
Hymenoptera
so that repeated collecting over several years has yielded only a handful of adult gall midges. The galls superficially resemble those of
A. caudicis
Gagné
in leaf axils of
Atriplex canescens
in North America (
Hawkins
et al
. 1986
). It is possible that, like
A. caudicis
,
A. scopuli
has more than one generation a year and induces galls in different plant parts in different seasons, but such galls have not yet been found.
Adult
: As in
A. punica
except for the following: third palpal segment 1.26–1.66 times as long as second; first antennal flagellomere 1.19–1.25 times as long as second in male, 1.47–1.52 as long as second in female.
Thorax
: Wing length
2.30–2.42 mm
in females (n=4),
1.98–2.19 mm
in males (n=3).
Female abdomen
: Sclerotized part of ovipositor 1.48–1.68 as long as sternite 7 (n=4).
Larva
: unknown.
Pupa
(
Figs. 17–18
):
2.81–3.46 mm
long (n = 4).
Material examined
.
Holotype
:
♂
,
Malta
,
Migra Ferħa
,
5–25.v.2012
,
D. Mifsud
, deposited in
TAUI
.
Paratypes
:
4♀
,
2♂
, 5 exuviae (2 on microscope slide, 3 glued to cardboard), same data as holotype (
2♀
NMNH
, others
TAUI
)
;
1 pupa
(coated, on SEM stub), same data as holotype, in private collection of
DM
.
Distribution
.
Endemic to
Malta
.
Etymology
.
The specific epithet is Latin for ‘of the cliff’, with reference to the unique habitat (seaside cliffs) of the host plant, an endemic to the Maltese Islands.
Notes
.
Asphondylia scopuli
is smaller than
A. punica
but we could not find any substantial morphological differences between adults and pupae of the two species, except for those outlined above. Nevertheless, the galls induced by these species are markedly different, as are their host plants;
Atriplex halimus
is a widespread desert and salt-marsh shrub with C
4
photosynthesis, whereas
Atriplex lanfrancoi
is endemic to seaside cliffs in the Maltese islands, and represents an ancient clade within
Atriplex
of species with C
3
photosynthesis (
Kadereit
et al
. 2010
). It is noteworthy that
A. halimus
is common in the Maltese islands but no galls were observed on it, including in localities where
A. lanfrancoi
galls were found (DM, personal observation). Our data leave us in no doubt that
A. scopuli
and
A. punica
are distinct species.