Chelonus annulipes

Chelonus annulipes

author(Wesmael, 1835)

synonyms

body

shape4.8 - 5.0 mm, black [P1]. ♀ 3.5 - 5.0, ♂ 4.4 - 4.9mm [Ch]. 4.0 - 5.0 [FTR]. 6 mm [Te1].

colorwhole body is rugose, black and covered with short whitish hairs [W].

head

shapeDorsal view (Fig. 1) transverse, 1.9-2.0 x as broad as long, length eye : temple = 1.3, temple either rounded or strongly rounded (Figs l and 3), occiput excavated. Ocelli small, elliptic, POL: OD: OOL as 17: 7: 20, i.e. POL somewhat shorter than OOL. Eye in lateral view (Fig. 2) 1.8 times as high as wide, temple faintly broadening ventrally and as wide as eye. Malar space 1.4 times as long as basal width of mandible. Face 1.6 times as wide as high, inner margin of eyes parallel. Clypeus 1.76 times as wide as high , its lower margin medially truncate [P1]. In dorsal view head width is 1.8 - 1.9 times the head length, head width is 1.2 - 1.3 times the mesosoma width. Ocellar triangle is blunt, in a straight line, OOL: OD: POL = 1.6: 0.3: 1.6 to 2.2: 0.5: 1.5. The temple is slightly rounded and slightly convergent, shorter than the eye; the length of the eye is 1.2 - 1.5 times that of the temple. The center of the face is slightly raised, with a small tubercle, the longitudinal ridge on the frons extends from this tubercle. The width of the face is 2.1 times its height (♂ 1.8 - 1.9 times), the clypeus is slightly higher than the face, and the boundary with the face is not obvious. The clypeus width is 1.6 - 1.7 times its height, 1/2 of the face width. The malar space distance is 1.2 times (♂ 1.0 - 1.1) the mandible base width [Ch]. The face is twice as wide as hight; malar space more than 1/2 of the longitudinal diameter of the eye; temples slightly more than the width of the eye. The ocelli are small; the distance between them and the eyes is 3-4 times OD [Te1].

sculptureRugosities on the face are very fine and seem to be transverse. Those on temples are rather striate and parallel to the eye. Clypeus is finely punctulate, interspaces shiny [W][P1]. On vertex behind ocelli with more than 5 weak transverse rugae [T4]. The forehead is sunken, with large and thick horizontal rugae, shiny, with obvious mid-longitudinal ridges, and thick net-like rugae between the forehead and the eye margin; The face is densely covered with short hair, the middle and lateral sides of the face each have larger, and the lower part has smaller horizontal reticular wrinkles. The clypeus is covered with sparse long hair, densely punctated, and shiny. The temples have dense horizontal reticular wrinkles [Ch]. Antennal fossa on the forehead densely transversely rugose, with a longitudinal carina in the middle [Te1].

colorMandible dark rusty brown [P1], mandibles and palpi black [W]. Mandible tip red and yellow, base black; palpi dark brown [Ch].

antenna

shape ♀♀ Antennal segments a bit compressed from about the middle, hardly longer than wide and very tight [W]. Antenna about as long as body, with 27 - 29 segments. 3rd segment 2.7-3 times and penultimate segment 1.2-1.4 times as long as broad [P1]. The antennae has 24 to 26 segments and is shorter than the body length. Its middle part is enlarged, slightly laterally flat. The scapus is thick. The length of the scapus, the 3rd segment and the subterminal segment are respectively 1.1 - 1.6 times, 2.7 - 2.8 times, 2.5 - 3.2 times and 1.0 - 1.3 times the width [Ch]. Antennae ♀ longer than head and thorax, noticeably compressed behind middle, 27-segmented [Te1]. 24 segments [Zh1].

shape ♂Almost as long as the body, with 32 segments (1 ind.) [W][M2]. The antennae have 29 - 30 segments, are shorter than the body, and gradually become thinner. The length of the scapus, 3rd, 4th and penultimate segment is respectively 2.1 - 2.5 times, 3.1 - 3.2 times, 2.1 - 2.2 times and 1.7 - 2.0 times the width [Ch]. Antenna of male distinctly shorter than body [FTR]. Equal to body length, filiform, 30 segments [Te1].

colorScape dark rusty brown [P1]. ♂ antennae black, setacious [W]. Antennae dark brown [Ch].

mesosoma

shapeMesosoma in lateral view stout, 1.3 times as long as high [P1]. Propodeum with two pointed teeth [W]. Scutellar sulcus with 6 wide and deep holes. Propodeum with mid-longitudinal ridges, clear lateral ridges at the ends, truncate porteriorly, with 4 teeth, very small mid-teeth, and large lateral teeth [Ch]. The prescutellar sulcus is equal to 1/2 the length of the scutellum, sharply crenulated. Propodeum with 2 teeth on the sides, with a sharp transverse ridge in the middle [Te1].

sculptureMesosoma rugose, mesonotum rugulose and subshiny, notauli distinct by rougher sculpture, scutellum with rugulae, interspaces shiny [P1]. Mesonotum coarsely rugose, with sharp longitudinal rugae in front of scutellum. Fig. 10 [T4]. Scutellum only rugose on the sides, disc shiny, slightly punctated [W]. The center of the scutellum is raised, smooth and shiny, with reticulated dimples on both sides. The mesopleurae are densely covered with short hairs, with reticulated dimples [Ch]. The mesosoma and propodeum are roughly rugose. The notauli are unclear. Median lobe of mesonotum densely punctate, with a coarsely rugose longitudinal groove in the middle [Te1].

color

legs

shapeHind femur length : width=3.4. Pair of spurs of hind tibia unequal, inner spur just less than half as long as hind basitarsus. Hind basitarsus as long as hind tarsomeres 2-4 combined [P1]. The length of the hind femur, tibia, and metatars are respectively 3.3 to 3.5 times, 5.5 to 6.0 times, and 6.1 - 6.2 times the width; the ratio of the length of the hind tarsi segments is 3.7: 1.4: 1.2: 0.9: 1.0 to 4.9: 2.0: 1.4: 1.1: 1.4; The length of the inner spur of the hind tibia is half as long as the metatarsus; the tarsal claw is large; the middle protrusion is large [Ch]. Hind tibia spurs equal to 1/2 of the metatars [Te1].

sculptureHind coxae rugose [Te1]. Hind coxae with dense thin transverse striae [?] [Ch]

colorCoxae and trochanters are black. Fore femur brownish-yellow with black base, middle femur black with brownish-yellow tip and back femur blackish at base and tip. Fore- and mid tibiae are brownish-yellow, hind tibiae blackish at the base, whitish in the middle and black towards the tip. Front and middel tarsi are brownish-yellow with a dark tip, hind tarsi blackish, with the base of the metatarsus whitish [W]. Legs yellow, coxae, trochanters, basal half of middle femur and entire hind femur brownish black, tarsi dark-brownish [P1]. Legs black, with the apex of the fore femur for 2/3, the apex of the mid femur for 1/2, and the fore and mid tibia and tarsi yellow-red. The base of the hind tibia for 2/3, and the hind tarsi brown, with the base of the metatars light yellow-brown [Ch]. Hind femur black [FTR]. ♀♂. The body and legs are black; fore tibia entirely, middle tibia in hind tibia in middle and base of hind tarsus reddish [Te1].

wings

shapeFore wing one-fifth shorter than body, pterostigma 3-3.5 times as long as wide, issuing radial vein distally from its middle; r as long as 3-SR, SR1 somewhat arched and ending far before tip of wing. 1-R1 + 2-R1 somewhat longer than pterostigma, 1-R1 a bit shorter than pterostigma [P1]. Fore wing length ♀ 2.7 - 3.8 mm. Pterostigma length is 3.2 - 3.7 times the width; 1-R1 vein is shorter than pterostigma; r vein extending from the middle of pterostigma, r: 2-SR: 3-SR: SR1 = 0.8: 2.5: 1.1: 4.0 to 1.5: 3.3: 1.5: 5.8; 1-CU1: 2-CU1 = 1.2: 3.0 to 2.0: 4.0; The length of the M+CU vein in the hindwing is the same as the 1-M vein. ♂ Fore wing 3.7 - 3.8 mm. The length of the pterostigma is 3.0 - 3.5 times the width; r: 2-SR: 3-SR: SR1 = 1.2 : 2.8 : 1.5: 4.8 to 1.6 : 3.0 : 1.4 : 6.0; 1-CU1: 2-CU1 = 1.6: 3.3 to 1.9: 4.0 [Ch]. Vein r shorter than 3-SR and r-m. SR1 4 times as long as 3-SR, slightly curved. 2-SR almost 2 times as long as 3-SR. 1-R1 is equal to the length of the pterostigma. 1-CU1 = 0.5 2-CU1 [Te1].

colorThe wings are transparent with a very light ashy tint. The stigma is black [W]. Wings brownish fumous, pterostigma opaque brown, veins proximo-distally yellowish to brownish [P1]. Tegulae dark rusty brown [P1]. Wing smoky brown, base dark brown, veins C+SC+R and parastigma red and yellow, pterostigma brown, the veins are light brown [Ch]. The wings are slightly smoky; tegulae and pterostigma black; the main segment of the medial vein and the basal vein are yellow [Te1].

metasoma

shapeCarapace in dorsal view 1.9-2 times as long as broad posteriorly, faintly broadening posteriorly; in lateral view (Fig. 6) 2.5-2.6 times as long as high behind, twice higher behind than basally (see arrows in Fig. 6). Carapace apico-ventrally somewhat incurved (Fig. 7), i.e. ventral opening of carapace nearly as long as carapace itself. [P1]. Metasoma 1.5 times as long as its width in middle (fig 11) [T4][Ay2]. The length of the carapace in the dorsal view is equal to the length of the head and mesosoma. The length is 1.8 to 1.9 times the width. The widest point is at the end 1/3. The apex is obviously arched and slightly truncated in lateral view, and the ventral cavity extends almost to the end or is even as long as the carapace [Ch].

sculptureRugosity longitudinal striate near base [W][P1]. Pair of converging keels short and restricted to declivous part of carapace. Carapace longitudinally striate with anastomosis, interstriations transversely rugulose, posterior declivous part of carapace rugose (Fig. 5) [P1]. The base 2/3 thickly longitudinal reticulate rugose, and the rest with small longitudinal rugose-like depressions [Ch].

color♂ At the base on each side a triangular whitish spot. ♀ Pale spots can be very large, only separated by a narrow black line [W]. Carapace with faint brownish tint, basally with a pair of yellow maculae [P1], ♂ with a small dark red spot near the center of the side, ♀ without maculae [Ch]. Yellowish spots of carapace rounded (photo 1) [FTR]

♀ ovipositorthe ovipositor sheath is 0.4 - 0.6 times the hind metatars [Ch]. The ovipositor is short, straight [Te1].

♂ aperturen.a.

other info

distributionBE,CH,DE,FR-F,NL,PL [FE]

remarks

hostsAnthonomus pomorum L., Ostrinia nubilatis ( Hübner) Loxostege sticticalis L. ,Eublema pannonica Fr. , Diatraea saccharalis F.，Sesamia sp. , Corcyra cephalonica Staint, Diatraea grandiosella Dyar, Agrotis segetum Schiff, Carpocapsa Pomonella L, etc. [Ch].

figures

fig. 1: ♀ head of female in dorsal view (Papp 1995)	fig. 2: ♀ head in lateral view (Papp 1995)	fig. 3: ♂ temple in dorsal view (Papp 1995)
fig. 4: distal part of right fore wing (Papp 1995)	fig. 5: ♀ carapace in dorsal view (Papp 1995)	fig. 6: ♀ carapace in lateral view (Papp 1995)
fig. 7: ♀ carapace in ventral view (Papp 1995)	fig. 8: ♂ carapace in lateral view (Papp 1995)	fig. 9: ♂ carapace in dorsal view (Papp 1995)
fig. 10: habitus (Tobias 1986)	fig. 11: metasoma in dorsal view (Tobias 1986)	fig. 12: ♀ habitus (Telenga 1941)

references

code	reference	type of info
AY1	Aydoğdu 2008	k
Ch	Chen et al. 2003	dkp
FTR	Farahani et al, 2013	kp
M2	Marshall 1889	d
P1	Papp 1995	Rk1f
S2	Szepligeti 1896a	d
Te1	Telenga 1941	dkf
Th	Thomson 1874	d
T4	Tobias 1986	kf
T13	Tobias 2000	k1f
W	Wesmael 1835	T
W2	Wesmael 1838	c
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: carapace in dorsal view (Farahani et al, 2013)	fig. 2: ♀ head, dorsal view (Chen et al. 2003)
fig. 3: ♀ head, frontal view (Chen et al. 2003)	fig. 4: ♀ mesonotum and scutellum (Chen et al. 2003)
fig. 5: ♀ metasoma, lateral view (Chen et al. 2003)	fig. 6: ♀ metasoma, lateral view (Chen et al. 2003)

type description

Wesmael 1835

Niger, rugosus , femoribus apice tibiisque anterioribus rufo-testaceis, tibiis posticis in medio testaceo-albidis ; abdomine basi macula utrinque pallida ; metathorace bidentato; ( antennarum articulis intermediis subcompressis, brevibus, arctissime junctis, ♀.) 2li.

?Chelonus annulatus. Ne. Von Es.. Hym. Ich. aff. 288. 10.

Var. 1, ♀. abdomine immaculato.

Tout le corps est rugueux, noir, couvert d’un duvet blanchatre très-court; le mèle a les antennes noires, sétacées, è peu prés de la longueur du corps, de 32 articles (chez un individu).

Les rugosités de la face sont trés-fines, et paraissent en partie transversales; celles des joues sont parallèles aux yeux. Le chaperon est finement pointillé; les mandibules et les palpes sont noirs. L’écusson n’a de rugosités que sur ses bords; tout son disque est luisant, un peu ponctué. Le métamesosoma est armé de deux dents aiguës. Les rugosités de l’metasoma sont longitudinales vers la base; prés de celle-ci, il y a de chaque cóté une tache triangulaire blanchatre. Les hanches et les trochanters sont noirs; les cuisses de devant sont d’un fauve testacé avec la base noire; celles du milieu sont noires avec l’extrémité d’un fauve testacé; celles de derrière sont noires. Les jambes de devant et celles du milieu sont d’un fauve testacé; celles de derrière sont noiratres prés de la base, blanchalres jusqu’au delà du milieu, puis noires jusqu’à l’extrémité. Les tarses de devant et ceux du milieu sont testacés avec l’extrémité obscure; ceux de derrière sont noiratres avec la base du premier article pale. Les ailes sont transparentes avec une très-légère teinte cendrée; le stigmate est noir.

La femelie diffière du male par la forme des antennes, dont les articles, à partir du milieu environ, sont un peu comprimés, à peine plus longs que larges, et très-serrés. L’extrémité est mutilée chez les deux seuls individus que je possède (il reste 19 articles à l’un d’eux ). Les taches pales de la base de l’metasoma sont fort grandes chez l’une de ces femelles, et ne sont séparées en avant que par une ligne noire étroite.

Je crois devoir rapporter à la méme espèce deux autres femelles un peu plus petites, et qui n’ont pas de taches è la base de l’metasoma. Les cuisses de devant ont un peu plus de noir. Elies ont malheureusement aussi les antennes mutilées vers l’extrémité; il reste chez l’une d’elles vingt-trois articles, et à en juger par la progression dans laquelle diminuent les derniers, je ne pense pas qu’il en manque plus d’un ou deux. Ce méme individu a la tarière accidentellement saillante hors de la cavité ventrale, sous forme d’un petit corps mince, droit, cylindrique, un peu velu.

J’ai pris ces cinq individus aux environs de Bruxelles, pendant les mois de juin et de juillet.

Observation. — Je cite avec doute le C. annulatus de M. Nees Von Esenbeck parce que l’individu femelie sur lequel il a établi cette espèce a 33 articles ( 32 selon ma manière de compter) aux antennes, et les cuisses fauves, avec la base seulement des quatre dernières noire.

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) 4 - 5 (5.5)	(4) 4 - 5 (5.5)
number of antennal segments:	(24) 24 - 28 (29)	(28) 28 - 32 (33)
head, dorsal view
Head width : length	narrow, wide	narrow, wide
Temples narrowing - widening	narrowing	narrowing
Eye length : temple length	1.0 - 1.25, > 1.25	1.0 - 1.25, > 1.25
Roundness temple	strong, medium, weak	strong, medium, weak
POL : OD	2 - 3, 3 - 4	2 - 3, 3 - 4
Ocellar triangle shape	very narrow, narrow	very narrow, narrow
Excavation of head	15 - 25%	15 - 25%
head, lateral view
Head height : length	very short, short	very short, short
Eye height : length	very short	very short
Temple length : eye length	very short	very short
head, frontal view
Head width : height	very narrow, narrow	very narrow, narrow
Face width : height	narrow, wide	narrow, wide
Eyes converging ventrally	about parallel	about parallel
EH : MSL	short	short
Clypeus width : height	semicircular, transverse	semicircular, transverse
Clypeus extending above bottom of eyes	far below	far below
Tentorial pits	large	large
Shape of lower margin clypeus	truncate	truncate
antennae
Antennal shape	slightly widened, clearly widened	filiform, not widened
Segment 3 length : width	medium	medium
Penultimate segment length : width	short, medium	medium, long
Length of antenna : length of body	3: long, 4: very long	3: long, 4: very long
mesosoma, lateral view
Length : height	short	short
transverse carina	well developed	well developed
lateral teeth	well developed	well developed
mesosoma, ventral view
Prepectal carina lamelliform	indistinct	indistinct
legs
Hind femur length : width ratio	medium	medium
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	not S-shaped	not S-shaped
cell M : cell Sm2	Sm2 large	Sm2 large
Pterostigma length : width ratio	medium, long	medium, long
Angle between radial vein (r) : vein 1-R1	sharp	sharp
metasoma, dorsal view
Length : width ratio of metasoma	short, medium, long	short, medium, long
Shape of metasoma	widest towards apex, tapering to base	widest towards apex, tapering to base
metasoma, lateral view
Length : height ratio of metasoma	short, medium	short, medium
posterior : anterior height ratio of metasoma	medium, large	medium, large
Position of maximum height	medium-posterior, posterior	posterior
metasoma, ventral view
Metasoma posteriorly curved forwards	(almost) not incurved, just/slightly incurved	(almost) not incurved, just/slightly 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	fine, medium	fine, medium
clypeus
coarseness punctation	punctulate, punctate	punctulate, punctate
density punctation	---	---
face
sculpture type	rugose, reticulate	rugose, reticulate
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	smooth, punctate	smooth, punctate
lateral	rugulose, rugose / striate	rugulose, rugose / striate
metasoma
base - mid sculpture	striate-rugose, longitudinally rugose / rugose-striate	striate-rugose, longitudinally rugose / rugose-striate
sculpture at apex	rugose	rugose
coarse / fine boundary	mid (50 - 70%)	mid (50 - 70%)
color
head
mandibles color pattern	entirely dark, light tip	entirely dark, light tip
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 light	medium dark, medium light
fore femur color pattern	base dark, entirely light	base dark, entirely light
hind femur lightest colour	dark	dark
hind femur color pattern	entirely dark	entirely dark
hind tibia lightest colour	medium dark	medium dark
hind tibia color pattern	wide light base	wide light base
hind basitarsus lightest colour	medium light, light	medium light, light
hind tarsus segment 2-3 lightest colour	dark, medium dark	dark, medium dark
wings
middle veins lightest colour	medium dark	medium dark
basal veins lightest colour	medium light, light	medium light, light
metasoma
metasoma colour pattern	color only on basal third	color only on basal third
metasoma lightest colour	light	medium light, light
metasoma base, colour pattern	1, 2 or 4 spots	1, 2 or 4 spots
metasoma base, light spots	2 small spots, 2 large spots	2 small spots
metasoma base, light band	n.a.	n.a.

Chelonus annulipes 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).

P1: Papp, 1995

Revision of C. Wesmael’s Chelonus species (Hymenoptera, Braconidae, Cheloninae).