Chelonus scabrator

Chelonus scabrator

author(Fabricius, 1793)

synonymsscaber (Nees, 1816), buccatus (Thomson, 1874)

body

shape5-8 mm [T16][Ay1][T4]. 6 - 8 mm [Te1]. 4.5 - 6.0 mm [H2].

colorBody completely black, rough, small punctures [F2]

head

shapeHead noticeably broadened behind eyes[T16][T4]. With not more than 5 weak transverse rugae on vertex behind ocelli [Ay1][T4]. The head is transverse, roundly narrowed posteriorly. The face is twice as wide as the height; genae equal to 1/2 of the longitudinal diameter of the eye; temples equal to the width of the eye. The ocelli are small, the distance between them and the eyes is 3-4 times the diameter of an ocellus [Te1].

sculptureThe head is, except for the clypeus, roughly rugose. The clypeus is finely punctated, shiny; Temples and posterior margin of vertex rugose-striated [Te].

color

antenna

shape ♀Antennae 24–27 segmented [Ay2]. Antennae equal to the length of the head and mesosoma, filiform, not compressed behind the middle, 24-27-segmented [Te1]. Atennae 24-27-segmented, thickened in the middle [T16]. 24 segments [Zh1].

shape ♂♂: Antenna as long as head + mesosoma + 0.5 carapace, with 24 segments. 3rd segment 3x as long as broad and penultimate 3-4 segments cubic. Antennae 24 - 27- segmented, thickened in middle [T4]. Antennae bristle-shaped, 30-segmented [Te1]. 27-30 segments [S2, scaber].

color

mesosoma

shapePropodeum with 2 teeth on the sides, with a closed field at the base [Te1]. Front edge of mesosoma [prepectal carina] with protruding lamella [H2].

sculptureScutellum punctated all around [N]. The entire mesosoma and propodeum are coarsely reticulate-rugose [Te1]. Scutellum mostly matt, striated or rugose [H2].

color

legs

shapeHind tibial spurs equal to 0.5 metatarsus length [Te1].

sculptureHind coxae rugose dorsally [Te1].

colorHind femora entirely black or only at apex reddish [T4][N][T16]. Tibiae pale brownish-yellow, hind tarsi dark with lighter base [N]. ♀: Legs black, fore and middle tibiae entirely and the very apex of all femora are reddish; hind tibia, except for apex, and base of hind tarsus yellowish. ♂: Hind tibiae yellowish [Te1]. Femora black [H2]. ♀ Black femora, shiny, extreme top of the fore and mid femur anteriorly reddish. Tibiae pale brownish-yellow, mid tibiae always darker at the tip, most often broadly blackish with pale base; Hind tarsi blackish with pale base. ♂ apex of mid and hind tibiae always more broadly black [M2, scaber].

wings

shapeVein r is equal to 3-SR and r-m; SR1 slightly curved, three times as long as 3-SR. 1-R1 equal to length of pterostigma. 1-CU1 = 0.5 times 2-CU1 [Te1].

colorWings dark transparent, stigma dark [N]. The wings are light, smoky behind the pterostigma; pterostigma and costal vein black; veins at base of fore wing yellow [Te1]. Parastigma and C+SC+R yellow [S4, scaber].

metasoma

shapeMetasoma 2-3 times as long as high in apical third, posteriorly curved forward ventrally, in apex uniformly rounded [Ay1]. Metasoma, slightly narrowed ventrally, at apex with longitudinal groove (Fig. 11) [Ay1][T4]. Posteriorly curved forward ventrally for not less than 1/5 to 1/6 of its length, 2–3 longer than high in apical third. Metasoma on lower side at apex noticeably compressed [Ay2]. ♀ Metasoma slightly longer than mesosoma, oval, slightly laterally compressed at apex and with a small notch on the underside. ♂ metasoma rounded at apex [Te1]. Metasoma oblong oval, a little narrowed towards the base. Basal carinae absent or almost absent [M2, scaber].

sculptureLongitudinal rugae are clearly visible in basal half of metasoma [Te1]. Metasoma reticulate rugose, with little elongated cells [M2, scaber].

color ♂ completely black [N][Te1]. ♂ sometimes with small spots [WA, see photo]. ♀ With large yellowish spots at base [T4][Ay2]. ♀ At base with clear yellow spots [Te1]. ♀ with two white spots, ♂ completely black [H2]. Rarely in the ♀ with two pale dots at the base, ♂ always black [M2, scaber]. ♂ with or without two yellow spots [S3, scaber][S4, scaber].

♀ ovipositorThe ovipositor is slightly curved [Te1]. The ovipositor sheath is relatively thick and curved [Zh1].

♂ aperturen.a.

other info

distributionWestern Europe [T4]. BE,AT,CH,DE,CZ,FR-F,GB-G,NL,PL,SE [FE]

remarks

hostsGriselda stagnana Den. et Schiff. (Tortricidae), Loxostege sticticalis L. (Pyraustidae), Oligia strigilis L. (Noctuidae) [T13]. Rhopobota stagnana; Rhopobota stagnana [Zh1].

figures

fig. 1: metasomal apex, from behind (Aydoğdu 2008)

fig. 2: metasomal apex (Tobias 1986)

references

code	reference	type of info	named as
AyB1	Aydoğdu & Beyarslan 2002	kf
Ay1	Aydoğdu 2008	k
F2	Fabricius 1793	T	Ichneumon scabrator
H2	Hellen 1958	dk
M2	Marshall 1889	d	scaber
N	Nees 1834	T	scaber
S2	Szepligeti 1896a	d	scaber
S3	Szepligeti 1896b	d	scaber
S4	Szepligeti 1898	k	scaber
T13	Tobias 2000	k1f
T16	Tobias 1972a	k
T4	Tobias 1986	kf
Te1	Telenga 1941	dk
Th	Thomson 1874	T	buccatus
Zh1	Zhang 2008	dk
FE	van Achterberg 2021	Fauna Europaea
legend:	Type description \| Redescription \| description \| in key \| comment \| nom. nov. \| figure(s) \| photo(s)

links

Fauna Europaea

photos

fig. 1: 20.03.12.002 - ♀ - 2020 Renkum (GE), NL. Lateral view (Arp)	fig. 2: 20.03.12.008 - ♂ - 2020 Renkum (GE), NL. Lateral view (Arp)
fig. 3: 20.03.12.002 - ♀ - 2020 Renkum (GE), NL. Dorsal view (Arp)	fig. 4: 19.109.036 - ♀ - 2020 Veenendaal (UT), NL. Head+mesosoma (Arp)
fig. 5: 19.109.036 - ♀ - 2020 Veenendaal (UT), NL. Head frontal view (Arp)	fig. 6: 20.03.12.002 - ♀ - 2020 Renkum (GE), NL. Wings (Arp)

type description

Fabricius 1793

Scabrator, 167.

I. niger scaber tibiis posticis basi rufïs.

Habitat Halae Dom.Hybner.

Parvus. Corpus totum nigrum, immaculatum, punctis parvis; elevatis scabrum.Femora antica basi parum rufa tibiaeque posticae apîce rufae.

Data used in the multi-access key

These data are collected from the species descriptions and redescriptions, from published figures and photographs and from own measureements and observations. For a description of the different variables and value classes see this pdf.

morphology
basic information	female	male
body length (mm):	(4.5) 4.5 - 6 (8)	(4.5) 4.5 - 6 (8)
number of antennal segments:	(23) 23 - 27 (28)	(26) 26 - 30 (31)
head, dorsal view
Head width : length	---	---
Temples narrowing - widening	narrowing, parallel	narrowing, parallel
Eye length : temple length	---	---
Roundness temple	strong, medium, weak	strong, medium, weak
POL : OD	3 - 4	3 - 4
Ocellar triangle shape	wide	wide
Excavation of head	---	---
head, lateral view
Head height : length	---	---
Eye height : length	---	---
Temple length : eye length	---	---
head, frontal view
Head width : height	---	---
Face width : height	wide	wide
Eyes converging ventrally	---	---
EH : MSL	short	short
Clypeus width : height	---	---
Clypeus extending above bottom of eyes	---	---
Tentorial pits	---	---
Shape of lower margin clypeus	---	---
antennae
Antennal shape	---	filiform, not widened
Segment 3 length : width	---	medium
Penultimate segment length : width	---	short
Length of antenna : length of body	2: short	3: long
mesosoma, lateral view
Length : height	---	---
transverse carina	---	---
lateral teeth	present	present
mesosoma, ventral view
Prepectal carina lamelliform	lamelliform	lamelliform
legs
Hind femur length : width ratio	---	---
Hind tibia length : hind tarsus length ratio	---	---
Hind tibia (longest) spur length : metatars length ratio	long	long
wings
Vein 1-R1 length : pterostigma length	long	long
Vein r length : vein 3-SR length	short	short
Shape vein SR1 (straight / concave / convex)	slightly concave	slightly concave
S-shape vein SR1	apically convex	apically convex
cell M : cell Sm2	---	---
Pterostigma length : width ratio	---	---
Angle between radial vein (r) : vein 1-R1	---	---
metasoma, dorsal view
Length : width ratio of metasoma	---	---
Shape of metasoma	---	---
metasoma, lateral view
Length : height ratio of metasoma	short, medium	short, medium
posterior : anterior height ratio of metasoma	---	---
Position of maximum height	---	---
metasoma, ventral view
Metasoma posteriorly curved forwards	(distinctly) incurved	(distinctly) incurved
male apical aperture
Aperture width : metasoma width	no aperture	no aperture
Aperture shape	n. a.	n. a.
Median process shape	n. a.	n. a.
sculpture
head
general coarseness	coarse	coarse
clypeus
coarseness punctation	punctulate	punctulate
density punctation	---	---
face
sculpture type	rugose	rugose
sculpture direction	transverse	transverse
vertex and temple
sculpture type	striate-rugulose, transverse rugulose	striate-rugulose, transverse rugulose
mesonotum
sculpture type	notauli slightly distinct	notauli slightly distinct
scutellum
middle	rugose / striate	rugose / striate
lateral	rugose / striate	rugose / striate
metasoma
base - mid sculpture	longitudinally rugose / rugose-striate	longitudinally rugose / rugose-striate
sculpture at apex	rugose	rugose
coarse / fine boundary	base (to 50%)	base (to 50%)
color
head
mandibles color pattern	entirely dark	entirely dark
palpi, lightest color	black, dark brown	black, dark brown
antennae
scapus, lightest color	black, dark brown	black, dark brown
segment 3 and 4, lightest color	black, dark brown	black, dark brown
legs
fore coxae lightest colour	dark	dark
fore femur lightest colour	medium dark	medium dark
fore femur color pattern	tip light	tip light
hind femur lightest colour	dark, medium dark	dark, medium dark
hind femur color pattern	entirely dark, tip light	entirely dark, tip light
hind tibia lightest colour	medium light	medium light
hind tibia color pattern	wide light base, entirely light	wide light base, entirely light
hind basitarsus lightest colour	medium dark, medium light	medium dark, medium light
hind tarsus segment 2-3 lightest colour	dark	dark
wings
middle veins lightest colour	medium dark	medium dark
basal veins lightest colour	light	light
metasoma
metasoma colour pattern	color only on basal third	entirely dark, color only on basal third
metasoma lightest colour	light	dark, light
metasoma base, colour pattern	1, 2 or 4 spots	entirely dark, 1, 2 or 4 spots
metasoma base, light spots	2 small spots, 2 large spots	n.a., 2 small spots
metasoma base, light band	n.a.	n.a.

Chelonus scabrator in published keys

T4: Tobias, 1986

Key to the Insects of the European Part of the USSR Volume III. Hymenoptera. Part four. Chapter 16

Ay1: Aydogdu 2008

A new species of the genus Chelonus Panzer, 1806 (Hymenoptera: Braconidae: Cheloninae) from Western Anatolia (Turkey).