A revision of the tribe Colpurini (Heteroptera: Coreidae) from the Fiji Islands

18 Pages·1996·12.2 MB·

by  H Brailovksy

PROC. ENTOMOL. SOC. WASH.
98(3), 1996, pp. 473-490
A REVISION OF THE TRIBE COLPURINI (HETEROPTERA: COREIDAE)
FROM THE FIJI ISLANDS
HARRY BRAILOVKSY
Departamento de Zoologia, Instituto de Biologia, U.N.A.M., Apdo Postal No. 70-153,
México, 04510 D.F, México.
Abstract.(cid:8212)A revision of the tribe Colpurini (Coreidae) from the Fiji Islands is pre-
sented. Altogether, three genera and six species are recorded, among them are one new
genus (Monasavuhygia) and four new species (Brachylybas delgadoi, B. taveunt, B.
vanua, and Monasavuhygia cordata). New localities are given for Acarihygia fijiana
Brailovsky and Brachylybas variegata (Le Guillou). The adult abdomen and male and
female genitalia are illustrated, and a key is provided for the known species.
Key Words: Coreidae, Colpurini, Fiji, Monasavuhygia, Brachylybas, Acarihygia
This contribution summarizes knowledge de México); USNM (National Museum of
of the tribe Colpurini (Heteroptera: Corei- Natural History, Smithsonian Institution,
dae) for the Fijian Islands, bringing together Washington, D.C.).
information from the literature and from All measurements are given in millime-
previously unstudied collections. ters.
The Fijian Colpurini have never been re-
vised. The first species recorded were by Le KEY TO THE FIJIAN COLPURINI
Guillou (1841), who described Gonocerus
1. Ocelli absent; buccula rounded, without teeth
variegatus, which was later transferred by or spine; micropterous.................. 2
Stal (1870) into the new genus Brachyly- (cid:8212) Ocelli present; buccula with a subacute middle
projection; macropterous ................ 3
bas. Kirkaldy (1908) studied the Fijian He-
2. Neck elongate and straight; postocular tubercle
miptera giving new records for B. varie-
absent; scutellar disc globose on each side.
gata. Brailovsky (1993) described Acari- RrS edat oyca thalhs Monasavuhygia cordata, n. gen., n. sp.
hygia fijiana, and Brailovsky and Martinez (cid:8212) Neck very short; postocular tubercle moderate-
(1994) revised Brachylybas and redescribed ly protuberant; scutellar disc flat on each side
AE ae Ree ae 2 Acarihygia fijiana Brailovsky
and gave new distribution records for B.
3. Male genital capsule with the posteroventral
variegata.
margin straight across (Fig. 11); gonocoxae I
In this paper I include all known species broad, and in lateral view with lower third
of Colpurini from Fiji Islands and describe strongly protruding into large lobes (Figs. 12(cid:8212)
one new genus and four new species. 13); apical margin of corium with inner third
deeply and broadly concave............
The abbreviations used in this paper are:
Farts tO ee Ate: Brachylybas vanua, 0. sp.
BMNH (The Natural History Museum, (cid:8212) Male genital capsule with the middle third of
London); BPBM (Bernice P. Bishop Mu- the posteroventral margin exposed in two short
seum, Honolulu, Hawaii); QMBA (Queens- arms or tubercles, separated along the middle
line by deep longitudinal cavity (Figs. 5, 8);
land Museum, Brisbane, Australia); UNAM
gonocoxae I slender, and in lateral view with
(Colecci6dn Entomoldgica del Instituto de
the lower third rounded and barely exposed
Biologia, Universidad Nacional Aut6noma (Figs. 7, 10); apical margin of corium almost
474 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
straight, or very faintly concave near mesal end Cook; 1 6, 1 @, Fiji, Viti Levu, Nausori
Highlands (600 m), 13 July 1987, G. B.
4. Abdominal sternite VI of the male clearly con-
Monteith; 1 6, Fiji, Viti Levu, Base of Mt.
stricted at the midline; dorsal abdominal seg-
ments VI to IX of the female strongly bent Victoria (650 m), 11 July 1987, G. B. and
downward in straight line; abdominal sternite S. R. Monteith. (BPBM, QMBA, UNAM,
V to VII of the female clearly constricted at USNM).
the midline
SOR oe Brachylybas variegata (Le Guillou)
Brachylybas Stal
(cid:8212) Abdominal sternite VI of the male and V to
VII of the female uniformly developed; dorsal
Brachylybas Stal, 1870. Ofv. Kong. Ve-
abdominal segments VI to IX of the female
tensk-Akad. 27: 653
almost straight
5. Body stout, ovate; rostrum long, reaching ab-
Diagnosis.(cid:8212)This genus is most closely
dominal sternite VII; scutellar disc with the
arms of the T-shaped mark strongly elevated related to Agathyrna Stal and Acanthotyla
CT Ar AdM eta tn Cee Svea aa Brachylybas taveuni, n. sp. Stal. The three genera have in common the
(cid:8212) Body oblong, not stout; rostrum short reaching
presence of ocelli, a tylus projected as a
only abdominal sternite V; scutellar disc with
short or large spine (except in B. vanua
the arms barely elevated
dices inenabbanckatceetonc-punicn Brachylybas delgadoi, n. sp. with apex truncate or bidentate), buccula
with a median projection, antennal segment
II the longest, and abdominal sternite VII
Acarihygia Brailovsky
of the female without plica or fissura. Aga-
Acarihygia Brailovsky, 1993: 435 thyrna differs in having the femora armed
ventrally; the other two genera are unarmed
The genus is best diagnosed by the fol-
or have a few tubercles. In Acanthotyla the
lowing set of characters: ocelli absent, tylus
antenniferous tubercle has a short broad
apically globose, buccula rounded without
lobe externally, head quadrate and clearly
teeth or spines, scutellum triangular with
wider than long, eyes substylate, and genae
rounded apex, abdomen strongly convex
armed with a prominent tubercle. In Bra-
dorsally, and female abdominal sternite VII
chylybas Stal, the antenniferous tubercle as
without plica or fissura. Parameres: Figs.
well as the genae are unarmed, the head
22-23.
pentagonal and clearly longer than wide
The genus was recently described by
and eyes hemispherical.
Brailovsky (1993) and includes only one
Generic redescription.(cid:8212)Head: Longer
species.
than wide, pentagonal, and dorsally slightly
Type species.(cid:8212)Acarihygia fijiana Brai-
convex; antennal segment II the longest,
lovsky.
segment III the shortest or equal than IV,
Acarihygia fijiana Brailovsky and I always longer than IV; antennal seg-
(Figs. 1, 22(cid:8212)23) ment I longer than maximum length of
head; tylus projected in front of juga, up-
Acarihygia fijiana Brailovsky, 1993: 436
turned to form a small horn at apex or api-
Description.(cid:8212)Given by Brailovsky cally bifurcate; ocelli not raised; eyes hemi-
(1993). The only additional information is spherical and protuberant; antenniferous
the shape of the parameres (Figs. 22(cid:8212)23). tubercle unarmed, truncated; genae un-
Known distribution.(cid:8212)Fiji, Viti Levu Isl., armed; mandibular plate unarmed; postoc-
2-10 km., South of Nandarivatu, Yayu ular tubercle prominent, globose; buccula
(near Nandarivatu) and Nandarivatu. elevated, short, not extending posteriorly
Other material examined.(cid:8212)1 <6, 1 2, beyond antenniferous tubercle, with sub-
Fiji, Viti Levu, Nandarivatu Reserve, (850 acute median projection; rostrum reaching
m), 25(cid:8212)26 July 1987, G. Monteith and D. anterior third of abdominal sternite V or
VOLUME 98, NUMBER 3 475
ii
a
Fig. 1. Acarihygia fijiana, dorsal view.
apex of the last abdominal segment; neck ward as small or medium conical teeth; hu-
short. meral angles rounded, not exposed; pos-
Thorax: Pronotum wider than long, tra- terolateral and posterior borders almost
peziform; anterior lobe shorter than poste- straight; calli weakly or clearly convex at
rior lobe, each margin convexly rounded; each side, and separated along middle line
collar present; frontal angles produced for- by a deep or shallow longitudinal furrow;
476 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
posterior disc with a pair of basal tubercles slender (Figs. 26(cid:8212)27) or short (Figs. 24(cid:8212)25)
at each side. Discs of mesopleura and me- and apically rounded.
tapleura not strongly convex, and hardly Female genitalia: Abdominal sternite VII
visible dorsally. entire, without plica or fissura, and at mid-
Legs: Femora unarmed or with one or dle third smooth or strongly emarginate.
two rows of short tubercles; tibiae cylindri- Genital plates. Gonocoxae I slender, en-
cal and sulcate. larged dorsoventrally, straight, in caudal
Scutellum: Triangular, wider than long; view with upper third opened and lower
disc with a distinct T-shaped elevation, with third closed, and in lateral view with exter-
anterior arms barely or strongly protruding; nal face almost straight and ventrally
apex almost flat, subacute. rounded and barely exposed (Figs. 9-10) or
Hemelytra: Macropterous, extending to gonocoxae I slender, enlarged dorsoventral-
anterior margin of abdominal segment VI ly, straight or obliquely straight, in caudal
or almost reaching the apex of abdomen; view almost entirely opened, and in lateral
apical corial margin straight throughout, or view with external face almost straight and
very faintly concave near apical third or not exposed (Figs. 15-16) or ventrally
with inner third deeply and broadly con- strongly exposed (Figs. 6-7) or gonocoxae
cave; membrane with a few of veins fur- I broad, enlarged dorso-ventrally, straight,
cate. in caudal view with upper third opened and
Abdomen: Male: Connexival segments lower third closed, and in lateral view ex-
higher than margin of hemelytron at rest; ternal face with upper third straight and not
posterior angles of each connexival seg- exposed, and lower third noticeable pro-
ments complete, not extending on a short truding into large lobes (Figs. 12(cid:8212)13); par-
spine; dorsal segments I to VII always al- atergite VIII small, triangular, with visible
most straight; abdominal sternite III to VII spiracle; paratergite IX conspicuously en-
uniformly developed or abdominal sternite larged, well developed and projected into
III to V and VII uniformly developed and middle space left by the gonocoxae I. Sper-
VI constricted at midline. Female: Connex- matheca: Bulb somewhat elongate, with
ival segments similar to male; dorsal seg- duct relatively coiled, chamber elongate
ments I to V straight, and VI to IX remark- and anteriorly folded (Figs. 28-31).
ably bent downward in straight line or dor- This genus, as recently reviewed by Brai-
sal segments I to IX almost straight; ab- lovsky and Martinez (1994), contained only
dominal sternite III to VII uniformly one species, B. variegata (Le Guillou) from
developed, except posterior borders of ster- the Fiji Islands; now it is known to have
nite IV or IV and V that are weakly folded four, with three of them herein described.
on midline or abdominal sternite III uni- Type species.(cid:8212)Gonocerus variegatus Le
formly developed, sternite IV uniformly de- Guillou.
veloped, except for its posterior border that
Brachylybas variegata (Le Guillou)
is folded at midline, and sternite V to VII
(Figs. 14-16, 24-25, 28(cid:8212)29)
constricted at midline (Figs. 7, 10, 13, 16).
Male genitalia: Genital capsule: Simple, Gonocerus variegatus Le Guillou, 1841:
globose; posteroventral margin entire, 262
transversely straight (Fig. 11) or with a me- Brachylybas variegatus: Stal, 1870: 653
dian expansion bearing two short arms or Brachylybas variegatus: Stal, 1873: 67
tubercles separated along midline by deep Brachylybas variegatus: Lethierry and Sev-
longitudinal cavity (Figs. 5, 8, 14). Para- erin, 1894: 42
meres. Base of body broad, internal and ex- Brachylybas_ variegatus: Kirkaldy, 1908:
ternal margin subparallel, constricted near 352
footlike apex, toe of extension elongate and Brachylybas variegatus: Blote, 1936: 33
VOLUME 98, NUMBER 3 477
Fig. 2. Brachylybas taveuni, dorsal v 1eW.
478 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Brachylybas variegata: Brailovsky and Fiji, Viti Levu, Naviti Resort, 3-5 August
Martinez, 1994: 67 1994, H. and K. Brailovsky; 1 ¢, Fiji, Viti
Levu, Base of Mt. Victoria (650 m), 11 July
Redescription.(cid:8212)Given by Brailovsky 1987, G. B. and S. Monteith. 1 2, Fiji, Va-
and Martinez (1994). The following addi- nua, Loma Loma, 24 March 1922, H. S.
tional information is given: Evans. 3 6, 6 @, Fiji, Tamavua, June 1929,
Male.(cid:8212)Body oval to suboval, relatively
D. Stoner. 2 ¢, 2 6, Fiji, Nasurito, June
stout. Head: Longer than wide, or wider 1923, Thomas. (BMNH, BPBM, QMBA,
than long; tylus apically with a spiny pro- UNAM, USNM)
jection; rostrum reaching anterior third of Notes.(cid:8212)This species can be easily dis-
abdominal sternite V or posterior third of tinguished by the constricted abdominal
VI. Pronotum: Calli weakly elevated, and sternite VI of the male and V to VII of the
irregularly rounded at each side. Scutellum: female, as well as the strongly bent dorsal
Arms of the T-shaped mark barely elevated.
abdominal segments VI to IX of the female.
Hemelytra: Macropterous, almost reaching
apex of last abdominal segment; apical cor- Brachylybas taveuni Brailovsky,
ial margin straight throughout. Abdomen: NEW SPECIES
Dorsal segments straight; abdominal ster- (Figs. 2, 8-10, 26-27, 30-31)
nite III to V and VII uniformly developed,
Description.(cid:8212)Male: Head length 1.92;
and VI constrained at midline. Genitalia. width across eyes 1.62; interocular space
Genital capsule: Posteroventral margin with 0.88; interocellar space 0.51; preocular dis-
medial expansion bearing two short tuber-
tance 1.16; postocular distance 0.26; length
cles, separated along midline by a deep lon- of antennal segments: 1, 1.96; II, 2.36; III,
gitudinal furrow (Fig. 14). Parameres: Figs.
1.64; IV, 1.80. Pronotum: Length of ante-
24-25. rior lobe 0.96; length of posterior lobe 1.32;
Female.(cid:8212)Abdomen: Dorsal segments I width of anterior lobe 2.20; width of pos-
to V straight and VI to IX strongly bent terior lobe 3.80. Scutellar length 1.80;
downward in horizontal line; abdominal width 2.08. Abdomen: Maximum width
sternite III uniformly developed, IV uni- 4.12. Total body length 10.00.
formly developed except for its posterior Female: Head length 2.00; width across
border that is folded at midline, and sternite eyes 1.70; interocular space 0.94; interocel-
V to VII constricted at midline (Figs. 15(cid:8212) lar space 0.43; preocular distance 1.26;
16). Spermatheca: Figs. 28-29. postocular distance 0.28; length of antennal
Known distribution.(cid:8212)FIJI ISLANDS: segments; If 2:02: Ml, 2332. siieles2 aly
Rewa. Vavao. Taveuni: Songgulu (10 km, 1.70. Pronotum: Length of anterior lobe
SW of Waiyevo), and 4 km, NE of Somo- 0.96; length of posterior lobe 1.50; width of
somo. Viti Levu: Suva (Mt. Korobaba and anterior lobe 2.24; width of posterior lobe
Moronivia). Nakavuandra Range Rewasa (5 4.00. Scutellar length 1.92; width 2.04. Ab-
km, SE of Rakiraki). Namosi road (6 km, domen: Maximum width 4.52. Total body
North of Queen(cid:8217)s Bay). Sawani. Lami Sai- length 10.55.
you (20 km., South of Nanduri). Naduru- Male.(cid:8212)Dorsal coloration black to dark
leulou-Waimaro (Cocoa Farm near Koro- brown, with following areas pale yellow to
vour). Savu-Savu. Tholoisuva. Nadarivatu yellowish brown; dorsal aspect of antenni-
(Mt. Lomalagi). Naitauvoli. Nausori. Ova- ferous tubercle, postocular tubercle, short
lau: Levuka. TONGA ISLANDS: Eua longitudinal band running behind postocu-
(Hafu) and Ile Vavao. lar tubercle, irregular spots scattered over
Material examined.(cid:8212)2 4, Fiji, Viti Levu pronotal disc, and apex of scutellum; anten-
(3 km, E. Monasavu Dam) (1000 m), 26 nal segments I and II shiny orange red, II
July 1987, Monteith and Cook; 3 dg, 1 @, shiny orange with basal join yellow, and IV
VOLUME 98, NUMBER 3 479
sa
&
e
Fig. 3. Brachylybas delgadoi, dorsal view.
orange with middle third orange yellow to ning below eyes from antenniferous tuber-
dirty yellow; tylus dark orange; hemelytral cle to neck, and rostral segments I to IV;
membrane dark ambarine with veins brown; thorax and abdomen dirty ocher yellow
connexival segments shiny orange red with with following areas black: punctures, pro-
posterior third yellow; dorsal abdominal sternum, mesosternum and metasternum,
segments black; following areas shiny or- and area adjacent to metathoracic peritre-
ange red: anterolateral border of pronotum me; genital capsule dark brown with orange
and costal margin of corium. Ventral col- reflections; anterior lobe of metathoracic
oration: Head black with following areas peritreme yellow and posterior lobe orange
yellow: longitudinal and slender stripe run- brown; coxae shiny dark red with anterior
480 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Fig. 4. Brachylybas vanua, dorsal view.
VOLUME 98, NUMBER 3 481
face mostly yellow; trochanters shiny yel- pronotal disc pale yellow to yellowish
low with orange red reflections; femora brown. 4, Femora yellow with three or four
shiny brownish red with three or four irreg- irregular rings and several discoidal spots
ular pale yellow rings; tibiae alternating dark red brown. 5, Abdominal sternite with
two yellow rings with three red brown the pleural margin bright orange red, except
rings; tarsal segment I shiny orange, tarsal the posterior third yellow. 6, Punctures
segment II yellow and III shiny orange with black to red brown. 7, Following areas dark
basal join yellow. orange: posterior third of pronotal disc, and
Male.(cid:8212)Body stout, ovate. Head: Tylus anterior half of scutellar disc.
apically with a spine projection; rostrum Type material.(cid:8212)Holotype: ¢, Fiji, Tav-
reaching anterior or posterior third of ab- euni, Des Voeux Peak rd., (900-1100 m),
dominal sternite VII. Pronotum: Calli ele- 16 July 1987, G. Monteith and D. Cook
vated, and irregularly rounded at each side. (QMBA). Paratypes: 6 366, 9 2°&, Fiji,
Scutellum: Arms of T-shaped mark strongly Taveuni, Des Voeux Peak rd., (900(cid:8212)1100
elevated. Hemelytra: Macropterous, extend- m), 16 July 1987, G. Monteith and D. Cook
ing to anterior margin of last abdominal (QMBA, UNAM); 1 &, Fiji, Nagassan, W.
segment; apical corial margin almost M. Mann (BMNH).
straight throughout. Abdomen: Dorsal seg- Notes.(cid:8212)This species is similar in color
ments I to VII straight; abdominal sternite and habitus to B. variegata (Le Guillou). In
III to VII uniformly developed. Genitalia.(cid:8212) B. taveuni Brailovsky, new species, the
Genital capsule: Posteroventral margin with body is stout and ovate, with abdominal
a medial expansion, bearing two short tu- sternite VI of the male and V to VII of the
bercles, separated along midline by deep female uniformly developed, and the ros-
longitudinal furrow (Fig. 8). Parameres: trum reaching the abdominal sternite VII.
Figs. 26(cid:8212)27. In B. variegata the body is oval to subov-
Female.(cid:8212)Similar to male. Connexival ate, relatively stout, with abdominal sternite
segments VIII and IX shiny orange red with VI of the male clearly constrained at the
posterior third yellow; dorsal abdominal midline and the abdominal sternite V to VII
segments VIII and IX black; genital plates of the female constrained, decurved and
ocher with punctures red brown. Hemely- narrowed at the midline with the rostrum
tra: Extending to anterior third of abdomi- shorter, and not extending beyond abdomi-
nal tergite VI or VIII. Abdomen: Dorsal nal sternite VI. In addition, the calli and
segments almost straight, not bent down- arms of T-shaped ridge on the scutellar disc
ward; abdominal sternite III to VII uniform- of B. variegata are weakly elevated, with
ly developed, except posterior border of the apex of parameres shorter (Figs. 24-(cid:8212)
sterna IV and V which are weakly folded; 2a1D)y.
middle third of abdominal sternite VII Etymology.(cid:8212)Named for the type locali-
smooth and shiny. Genitalia.(cid:8212)Genital ty; a noun in apposition.
plates: Gonocoxae I enlarged dorso-ven- Distribution.(cid:8212)Known only from the Fiji
trally, slender, straight, in caudal view with Islands.
upper third opened and lower third closed,
Brachylybas delgadoi Brailovsky,
and in lateral view with external face
NEW SPECIES
straight and ventrally rounded (Figs. 9-10).
(Figs. 3, 5-7)
Spermatheca: Figs. 30-31.
Variation.(cid:8212)1, Head in dorsal view yel- Description.(cid:8212)Male: Head length 1.60;
low with middle third including the inter- width across eyes 1.52; interocular space
ocellar space black to dark brown. 2, Ros- 0.80; interocellar space 0.48; preocular dis-
tral segment I yellow with apical third black tance 0.98; postocular distance 0.21; length
or dark brown. 3, Calli and middle third of of antennal segments: I, 1.68; II, 2.10; II,
482 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Figs. 5-13. 5-7, Brachylybas delgadoi. 5, Male genital capsule, caudal view. 6, Female genital plates, caudal
view. 7, Female genital plates, lateral view. 8-10, B. taveuni. 8, Male genital capsule, caudal view. 9, Female
genital plates, caudal view. 10, Female genital plates, lateral view. 11-13, B. vanua. 11, Male genital capsule,
caudal view. 12, Female genital plates, caudal view. 13, Female genital plates, lateral view.