Revision of the genus Exochomoscirtes Pic (Coleoptera: Scirtidae: Scirtinae) 2598
Author
Ruta, Rafał
Author
Yoshitomi, Hiroyuki
text
Zootaxa
2010
2010-08-31
2598
1
1
80
https://biotaxa.org/Zootaxa/article/view/zootaxa.2598.1.1
journal article
10.11646/zootaxa.2598.1.1
11755334
10095059
B7D2F686-CE7A-42AE-8395-4527E587C565
Exochomoscirtes bimaculatus
Pic, 1916
Exochomoscirtes bimaculatus
Pic, 1916: 7
(
Figs. 10A
,
11A
,
15
)
Type material.
Holotype
, female (
MNHN
):
“…[
Java
?, illegibly written] / Wallace” [printed & handwritten label]; “type” [yellow label, handwritten by
Pic
]; “
Exochomoscirtes
/
bimaculatus Pic
” [blue label, handwritten].
FIGURE 10.
Selected holotype labels.
A)
Exochomoscirtes bimaculatus
Pic
;
B)
E. binotatus
Pic
;
C)
E. decemguttatus
(Champion)
;
D)
E. ephippiatus
(Champion)
;
E)
E. maculatus
(Bourgeois)
;
F)
E. maculatus
(Waterhouse)
;
G)
E. rufomaculatus
Pic
;
H)
E. sphaericus
(Champion)
;
I)
E. tetrastigma
(Champion)
.
Diagnosis.
Similar to
E. bipustulatus
(Champion)
, but distinctly smaller (TL of
E. bipustulatus
4.95) and with distinct prehensor. Slightly resembles
E. basipunctatus
sp. nov.
, but has smaller and not elongated body.
Redescription.
Holotype
, female. Body hemispherical, TL/EW 1.21, very convex, covered with yellowish suberect setae. Head and pronotum brownish-black, elytra brownish-black, each with large oval macula in anterior half extending to anterior margin. Mouthparts, antennae and legs brown.
Head covered with dense punctures, separated by 0.5–1.0 diameter. Eyes big, moderately protuberant; head 1.8 X wider than interocular space. Antennae filiform, antennomere 1 subcylindrical, antennomere 2 and 3 subequal in length, antennomeres 4–7 1.5 X longer than antennomere 3. Antennomeres 8–11 absent in the
holotype
. Palpomeres of maxillary palpi very wide.
Pronotum slightly convex, covered with dense punctation, punctures separated by ca. 1.0 diameter, anterolateral corners projecting anteriorly, somewhat obtuse; lateral margins straight; posterolateral corners acute; base of pronotum subtrapezoidal, with complete groove along basal margin; PW/PL 3.4. Scutellum punctured as on pronotum, equilaterally triangular. Angle between pronotum and elytra not marked in dorsal outline.
FIGURE 11.
Habitus illustrations of
Exochomoscirtes
.
A)
E. bimaculatus
Pic
;
B)
E. basipunctatus
sp. nov.
;
C)
E. binotatus
Pic
;
D)
E. rufomaculatus
Pic
;
E)
E. ephippiatus
(Champion)
;
F)–I)
E. picturatus
sp. nov.
, color forms;
J)–L)
E. takizawai
sp. nov.
, color forms;
M)
E. tetrastigma
(Champion)
. Scale bar = 2.0 mm.
FIGURE 12.
Habitus illustrations of
Exochomoscirtes
.
A)
E. maculatus
(Waterhouse)
;
B)–C)
E. ceylonicus
sp. nov.
;
D)
E. decemguttatus
(Champion)
;
E)–G)
E. klausnitzeri
sp. nov.
, color forms
F
– S Thailand, male,
E
and
G
– Sarawak, females;
H)
E.
cf.
klausnitzeri
(NW Thailand);
I)
E. luteosuturalis
sp. nov.
;
J)
E.
cf.
luteosuturalis
sp. nov.
, female, Sulawesi;
K)
E.
cf.
luteosuturalis
, female, Vietnam;
L)
E. luteosuturaloides
sp. nov.
;
M)
E. jaechi
sp. nov.
;
N)
E. ruforotundus
(Watts)
;
O)
E. ruforotundus
(Watts)
, Bali. Scale bar = 2.0 mm.
FIGURE 13.
Habitus illustrations of
Exochomoscirtes
.
A)
E. quadripartitus
sp. nov.
;
B)
E. discoidalis
(Pic)
, male;
C)
E. discoidalis
(Pic)
, female;
D)
E. thailandicus
sp. nov.
;
E)
E. serricornis
sp. nov.
;
F)
E. cambodiensis
sp. nov.
;
G)
E. bezdeki
sp. nov.
, male;
H)
E. bezdeki
sp. nov.
, female;
I)
E. nigromarginatus
sp. nov.
;
J)
E. sphaericus
(Champion)
;
K)
E. globosus
sp. nov.
;
L)
E. buechei
sp. nov.
;
M)
E. dilaticornis
sp. nov.
, male. Scale bar = 2.0 mm.
FIGURE 14.
Habitus illustrations of
Exochomoscirtes
.
A)
E. dilaticornis
sp. nov.
, female;
B)
E. pectinatus
sp. nov.
;
C)
E. longispinus
sp. nov.
;
D)
E. nipponicus
sp. nov.
;
E)
E. nahangensis
sp. nov.
;
F)
E. arunachalensis
sp. nov.
;
G)
E. meghalayensis
sp. nov.
Scale bar = 2.0 mm.
FIGURE 15.
Exochomoscirtes bimaculatus
Pic.
A
)
bursal sclerite;
B)
female genitalia.
Elytra broadly oval, without traces of longitudinal ridges, with explanate lateral margins, widest in the middle, punctation stronger than on pronotum, distance between punctures ca. 0.5–1.0 diameter; humeri well marked; EL/EW 1.1; EL/PL 4.6; EW/PW 1.3.
Legs moderately long. Hind tibial spurs well developed, the longer spur is almost straight, almost as long as tarsomere 1, shorter spur slightly curved, as long as 1/3 of the length of longer spur.
Ventrites 1 and 2 with sparse setation in mesal portions, ventrite 2 with basal row of big punctures. Apex of tergite 7 unmodified. Apex of ventrite 5 truncate.
Female genitalia.
Prehensor short (L 0.48) and relatively wide, bursal sclerite well developed, duct connecting prehensor with bursal sclerite wide, accordion-folded.
Male unknown.
Measurements.
Female (n = 1): TL 3.75, PL 0.70, PW 2.40, EL 3.25, EW 3.10.
Distribution.
Java
(according to the original description).