O sis,
8:
73-77 (I 993)
Desc ip ion o he male o
Eu hyce a seguyi
Vala,
1990
(Dip e a, Sciomyzidae)
Miguel
Ca les-Tol hl
and
Jean-Claude
Vala2
1. A da. P incipe As u ias 30 á ico
la,
08012 Ba celona, Spain
2.
Uni e si é d'A ignon, Labo a oi e de Biologie Animale, 33, me Louis Pas eu , 84000 A ignon,
F ance
Key wo ds:
Allo ype male, dip e a, dis ibu ion,
Eu hyce a seguyi,
Sciomyzidae.
Abs ac .
The male o
Eu hyce a seguyi
Vala, 1990 (Dip e a, Sciomyzidae) is desc ibed and illus-
a ed o he i s ime. The dis ibu ion o his species, limi ed o iginally o he ype-locali y in F ance
is ex ended o Spain. A key o wes -palea c ic species o
Eu hyce a
is es ablished.
Resumen.
Desc ipción del macho de
Eu hyce a seguyi
Vala, I990 (Dip e a Sciomyzidae).
Se cap-
u a y desc ibe po p ime a ez el macho de
Eu hyce a seguyi
Vala. La dis ibución de dicha espe-
cie se amplia a España. Po úl imo, se da una cla e de las especies paleá ico-occiden ales de
Eu hyce a.
In oduc ion
In 1990, Vala desc ibed a new species o Sciomyzidae,
Eu hyce a seguyi,
om a
single emale collec ed in F ance a Le Ve ne nea Pe pignan (Py énées O ien ales)
in 1904. The emale holo ype was disco e ed in he Dip e a collec ion o he
INRA
Ve sailles. A ew mon hs la e , he i s au ho ecei ed a male specimen o
Eu hyce a
collec ed by M . Ga an o in no h-eas e n Spain. A e a de ailed s udy
we came o he conclusion ha i belongs o
Eu hyce a seguyi.
In
ac , i shows
all o he mos dis inc i e cha ac e s o he species, a ypical gene al pa e n and
he absence o ac os ichal p esu u al and p escu ella b is les in pa icula .
We p esen he desc ip ion o he male o
Eu hyce a seguyi
and illus a e he
male geni alia o he i s ime. The examined specimen is he e designa ed as he
allo ype o he species unde s udy.
Eu hyce a seguyi
Vala. Male (Figu es 1-8)
Head. Face conca e, wi h a whi ish p uinosi y, wi hou any da kening in
middle. La ge lunula, shiny g ey-b own, s ongly exposed, wi h dep ession
in middle, and p o ube an be ween an ennae. Mid- on al s ipe b own, subshi-
ning, la ge, and conca e mid- on al s ipe, almos eaching an e io ma gin o
ons. O bi o-an ennal spo be ween lunula and eye ma gin pale b own, no e y
isible. On each o bi al pla e, 2 pai s o on o-o bi al b is les, bases o b is les
a e linked oge he by a long el e y b own o bi al spo . Each o bi al spo edged
on an e io (ocula side) and pos e io hal (ocella iangula side) wi h sil e y
p uinosi y. O bi al pla es ma yellow, wi h a ew ine and sho hai s on an e io
ma gin. Con ex ocella iangle wi h
2
s ong ocella b is les. 1 pai o inne and
ou e e icals. Ve y s ong pos ocella b is les. Cheeks wi h a ew ine black
hai s ex ending along la e al ma gin o ace. Some s onge and longe hai s on
occipu . An ennae b ownish; i s segmen minu e, yellow-b own, wi h a ow o
b is les on an e io ma gin; second segmen subshining, wi h many sho b is-
les, pa icula ly on an e io ma gin; hi d segmen subequal o second segmen ,
ma , yellowish a ound base o a is a. A is a wi h b own basal segmen s, es o
a is a wi h sho and whi e plumosi y.
Tho ax. G eyish, wi h
4
dis inc longi udinal da k s ipes on mesono um:
2 con inuous linea submedian, 2 la e al ones cu by he ans e se su u e. On each
side o mesono um, chae o axy consis ing o 1 hume al, 2 no opleu al,
1
sup aa-
la , 2 pos ala and 2 do socen al b is les. Scu ellum wi h a la ge b own longi u-
dinal s ipe and 2 pai s o scu ella b is les.
Legs. Pale yellow excep o 115 apical pa o o e ibia and he 3 las o e
a sal segmen s being black. Ta sal segmen s o o he legs mo e o less whi-
ish, ne e heless 2-3 i s segmen s da kened by dense sho hai s. Fo e emu
wi h
5
s ong an e odo sal b is les and ano he 1 in middle o uppe pos e io
side. Middle emu wi h 1 s ong an e io b is le in middle. Hind emu wi h 2
en ola e al ows o s ong b is les. P eapical b is les well de eloped on all
ibiae.
Abdomen. Yellowish b own, s ongly ma ked wi h whi ish p uinosi y; do sal
side dis inc ly da ke ; longi udinal b own ma k p esen on each abdominal seg-
men . Pe iand ium b ownish.
Male geni alia (Figs. 1-8): syns e ni e (Fig. 2) and s e ni e V (Fig. 3) equiped
wi h la ge scle o ized pa s; gonos ylus
(=
pos e io su s ylus) wi h solid base and
con ex ex e na1 edge (Figs. 1, 4, 5, 6). An e io co nua o hypand ium in shape
o a claw wi h e y ou sp ead hal es (Fig.
7)
and wi h la ge scle o ized pla e be -
ween hem.
Body leng h 6.6 mm, wing leng h 5 mm.
Ma e ial examined
Allo ype male: Spain, Ta agona, Aiguamú cia, 13-20.XI. 1988 (Ga an o leg.), co-
llec ed wi h a inega ap. Addi ional emale: Spain, Ba celona, Begas, 28.1X.1982
(Ca les-Tol h leg.), collec ed on g ass in a bu ned pinewood.
All ma e ial is deposi ed in he p i a e collec ion o D . Ca les-Tol h.
EUTHYCERA SEGUYI,
MALE
75
Figu es 1-8.
Eu hyce a seguyi
allo ype male. 1, pe iand ium in caudal iew.
2,
syns-
e ni e
6-7.
3,
s e ni e
V.
4,
gonos ylus in caudal iew.
5,
ibid. in an e io iew.
6,
ibid.
in la e al iew.
7,
aedeagal complex, ejacula o y apodeme and hypand ium in an e io
iew. 8, aedeagal complex in pos e io iew. aed= aedeagus; aej= ejacula o y canal
apodeme; an hyp= an e io a m o hypand ium; ce = ce cus; gon= gonos ylus; hyp=
hypand ium; pa = pa ame e
(=
pos goni e); pe i= pe iand ium. Scales equal o
0.2
mm.
76
M.
CARLES-TOLRA
&
J.-C.
VALA
Discussion
Rega ding Vala's desc ip ion o
Eu hyce a seguyi
emale (1990), we ound only
a ew ex e na1 mo phological di e ences be ween bo h sexes: he igh an e io
do socen al b is le is p esen , no hai s on he p os e num a e dis inc and he o -
bi o-an ennal spo is ba ely isible in he male. As ega d he male pos abdomen,
he pa icula mo phology o syns e ni e 6-7 (s e num 6), hypand ium and aede-
agal complex a e clea ly di e en om hose o he o he
Eu hyce a
species.
Among 17 species o he genus
Eu hyce a, Eu hyce a seguyi is
he nin h species
eco ded in Spain: Rozkosny (1987), Vala (1989) and Ca les-Tol h (1990). The
p e iously ci ed species a e
E.
ala is
Vala, 1983,
E. chae ophylli
(Fab icius, 1798),
E. c ib a a
(Rondani, 1868),
E. umiga a
(Scopoli, 1763),
E. s ichospila
(Cze ny,
1909),
E. s ic ica
(Fab icius, 1805),
E. ocke o hi
Rozkosny, 1988 -des-
c ibed exclusi ely om Spain-, and
E. zelle i
(Loew, 1847). In addi ion o
hese species, we can ci e
E. guanchica
(F ey, 1936), endemic species o Cana y
Islands.
The species is ecen ly known in he wes -medi e anean a ea wi h 1 si e in
sou h-wes e n F ance and
2
si es in no h-eas e n Spain (Fig. 9). Geog aphically
all hese si es a e si ua ed in he same Ca alonian a ea.
Figu e
9. Eu hyce a
seguyi,
dis ibu ion
map.
EUTHYCERA
SEGUYI,
MALE
77
Key o he wes -medi e anean species o
Eu hyce a
1. A is a long black plumose, yellowish species
....................
chae ophylli
(Fab icius)
-
A is a sho whi e hai ed
.....................................................
2
2. Face wi h a black spo in he middle
...................................
3
-
Face wi hou black spo
.......................................................
4
3.
Mesono um wi hou ac os ichal p esu u al b is les, emo a
bicolo ous, da k b own wi h a b oad yellow ing in apical hal
a leas on middle and hind emo a
.....................................
ocke o hi
Rozkosny
-
Mesono um wi h comple e chae o axy, emo a unicolo ous
s ic ica
(Fab icius)
4.
Mid- on al s ipe la and ma , an enna da k b own o blac.
c ib a a
(Rondani)
-
Mid- on al s ipe conca e and shining
...............................
5
5. An e io wing ma gin mainly da k b own wi hou pale spo s,
legs yellow
..........................................................................
umiga a
(Scopoli)
-
An e io wing ma gin wi h pale spo s
.................................
6
6. Mesono um wi hou p esu u al
and
ac os ichal p esu u al b is-
seguyi
Vala
les
........................................................................................
-
Mesono um wi h comple e chae o axy
................................
7
7.
Wings wi h pale spo s concen a ed in o dis inc g oups
......
ala is
Vala
-
Wings wi h pale spo s no concen a ed in o g oups
...........
8
8. Body da k b own, cen al a ea o wings a ound an e io
c oss- ein no dis inc ly pale
.............................................
s ichospila
(Cze ny)
-
Body yellow-b own, cen al a ea o wings a ound an e io
c oss- ein dis inc ly pale
...................................................
zelle i
(Loew)
Acknowledgemen s
We wan o hank e y much M . Osca Ga an o (Mida, Les Bo ges Blanques) o he loan o his
dip e ological ma e ial o s udy. We a e also mos g a e ul o D .
R.
Rozkosny o Bmo (Czechoslo akia)
o co ec ions and co nmen s on he o iginal manusc ip .
Re e ences
Ca les-Tol h,
M.
1990. Con ibución al es udio de 10s Dip e a, Cyclo hapha, Acalyp a ae
(Insec a) de España peninsula . Tesis Doc o al. Facul ad de Biologia. Ba celona.
621 pp.
Rozkosny, R. 1987. A e iew o he palaea c ic Sciomyzidae (Dip e a). Folia Fac. Sci.
Na u . Uni . Pu kyn. B un., Biol., 86: 1-99
+
56 pls.
Rozkosny, R. 1988. New eco ds o Sciomyzidae (Dip e a) om Spain, including he
desc ip ion o a new species o
Eu hyce a
La eille. Ac a en . bohemoslo .,
85: 457-463.
Vala,
J.-C.
1989. Dip k es Sciomyzidae eu o-médi e anéens. Faune de F ance 72,
302 p.
9
pl.
Vala, J.-C. 1990. Une nou elle espbce
d'Eu hyce a
La eille écol ée en F ance (Dip e a:
Sciomyzidae). Annals Soc. en . F . (N.S.), 26(3): 451-455.
Manusc ip ecei ed
on
Ap ill992