Chelonus zaitzevi
authorTobias, 1972
synonyms
body
shape♀♂: 2.7 - 2.8mm [T14][Zh1].
colorThe body is black [T14].
head
shapeThe head is noticeably widened to narrowed behind the eyes [T17]. The head is slightly widened behind the eyes, its width is twice its length. The width of the ocellar triangle is noticeably less than OOL. POL is 3 times the diameter of the ocellus. The longitudinal diameter of the eye is twice the transverse one, 2.5 times the height of the malar space. The width of the face is twice its height. Maxillary palp much shorter than head height. ♂: Temples 1.5 times as long as transverse eye diameter. The width of the face is 1.8 times its height [T14].
sculptureThe face does not have transverse rugae, but they are poorly developed on the vertex behind the ocelli [T14]. Vertex and temples with fine linear patterns, face with fine and irregular reticulate rugae, Clypeus flat, sparsely punctated, and slightly shiny [Zh1].
color
antenna
shape ♀Antennae equal to the total length of the head and mesosoma; length of 3rd antennal segment 3 times its width, preapical one slightly longer than its width [T14][Zh1].
shape ♂Antennae 19-20-segmented [T14][Zh1].
color
mesosoma
shapeMesosoma length 1.25 times its height. Propodeum with small lateral teeth [T14].
sculptureMesonotum with dense punctures, matte [T17, key]. Mesonotum entirely covered with dense microsculpture, matt [T14]. Mesonotum reticulate rugose, turning into longitudinal rugae before scutellum. Scutellum raised, with coarse punctures, matt [Zh1].
color
legs
shapeLength of hind femur three times its width [T17][Zh1]. Hind femur 3 times as long as wide. The hind tibia are shorter than the hind tarsus [T14].
sculpture
color♀: Apex of fore femora, fore and middle tibiae yellowish brown. Hind tibia brown, (indistinct) yellowish brown in the middle. The tarsi are brown. ♂: Hind tibia dark brown, yellowish brown in the middle [T14]. The base half of the hind tibia is dark brown [Zh1].
wings
shape♀: Vein 1-R1 is slightly shorter than the pterostigma [T17][T14][Zh1]. ♂: 1-R1 is much shorter than the pterostigma [T14].
colorTegulae and pterostigma dark brown [T17, key]. ♀: The wings are darkened, ♂: The wings are slightly darkened [T14].
metasoma
shapeThe apex of the metasoma is bent ventrally by no more than 0.15 of its length [T17, key]. Metasoma oval, apically slightly bent forward, almost twice as long as wide [T14]. Metasoma is short and oval, the apex is slightly curved inward [Zh1].
sculptureThe longitudinal rugae of the metasoma weakly anastomose and almost reach its apex [T14]. The end half [basal half ?] of the metasoma has longitudinal rugae, and the rest is irregular reticular rugose [Zh1].
colorThe metasoma is completely black [T14].
♀ ovipositorSternites and ovipositor slightly protrude from under the metasomal carapace [T14].
♂ apertureThe width of the apical aperture is twice its height [T14]. The aperture is a long oval, and the lower edge is curved in the middle [Zh1].
other info
distributionDK [FE].
remarks
hosts
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): | (2.5) 2.5 - 2.9 (3) | (2.5) 2.5 - 2.9 (3) |
| number of antennal segments: | 16 | 19 - 20 |
| head, dorsal view |
| Head width : length | wide, very wide | wide, very wide |
| Temples narrowing - widening | parallel | parallel |
| Eye length : temple length | 0.75 - 1.0 | 0.75 - 1.0 |
| Roundness temple | very strong, strong | very strong, strong |
| POL : OD | 2 - 3, 3 - 4 | 2 - 3, 3 - 4 |
| Ocellar triangle shape | narrow | narrow |
| Excavation of head | <15% | <15% |
| head, lateral view |
| Head height : length | --- | --- |
| Eye height : length | short, long | short, long |
| Temple length : eye length | --- | --- |
| head, frontal view |
| Head width : height | --- | --- |
| Face width : height | narrow, wide | narrow, wide |
| Eyes converging ventrally | --- | --- |
| EH : MSL | long | long |
| 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 | --- | --- |
| mesosoma, lateral view |
| Length : height | short | short |
| transverse carina | --- | --- |
| lateral teeth | weak, small, short | weak, small, short |
| mesosoma, ventral view |
| Prepectal carina lamelliform | indistinct | indistinct |
| legs |
| Hind femur length : width ratio | short | short |
| Hind tibia length : hind tarsus length ratio | short | short |
| Hind tibia (longest) spur length : metatars length ratio | | |
| wings |
| Vein 1-R1 length : pterostigma length | medium, long | medium, long |
| Vein r length : vein 3-SR length | | |
| Shape vein SR1 (straight / concave / convex) | | |
| S-shape vein SR1 | --- | |
| cell M : cell Sm2 | --- | --- |
| Pterostigma length : width ratio | --- | --- |
| Angle between radial vein (r) : vein 1-R1 | --- | --- |
| metasoma, dorsal view |
| Length : width ratio of metasoma | medium | medium |
| Shape of metasoma | --- | --- |
| metasoma, lateral view |
| Length : height ratio of metasoma | --- | --- |
| posterior : anterior height ratio of metasoma | --- | --- |
| Position of maximum height | --- | --- |
| metasoma, ventral view |
| Metasoma posteriorly curved forwards | (almost) not incurved, just/slightly incurved, (distinctly) incurved | (almost) not incurved, just/slightly incurved, (distinctly) incurved |
| male apical aperture |
| Aperture width : metasoma width | no aperture | small, medium |
| Aperture shape | n. a. | (nearly) round, oval |
| Median process shape | n. a. | --- |
| sculpture |
| head |
| general coarseness | fine | fine |
| clypeus |
| coarseness punctation | punctate | punctate |
| density punctation | --- | --- |
| face |
| sculpture type | rugose, reticulate | rugose, reticulate |
| sculpture direction | irregular | irregular |
| vertex and temple |
| sculpture type | striate (striolate), striate-rugulose | striate (striolate), striate-rugulose |
| mesonotum |
| sculpture type | --- | --- |
| scutellum |
| middle | punctate | punctate |
| lateral | rugulose | rugulose |
| metasoma |
| base - mid sculpture | longitudinally rugose / rugose-striate | longitudinally rugose / rugose-striate |
| sculpture at apex | rugose, rugulose | rugose, rugulose |
| coarse / fine boundary | mid (50 - 70%) | mid (50 - 70%) |
| color |
| head |
| mandibles color pattern | --- | --- |
| palpi, lightest color | --- | --- |
| 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 light | medium light |
| fore femur color pattern | tip light | tip light |
| hind femur lightest colour | dark | dark |
| hind femur color pattern | entirely dark | entirely dark |
| hind tibia lightest colour | medium dark, medium light | medium dark, medium light |
| hind tibia color pattern | entirely dark, narrow light ring | entirely dark, narrow light ring |
| hind basitarsus lightest colour | medium dark | medium dark |
| hind tarsus segment 2-3 lightest colour | medium dark | medium dark |
| wings |
| middle veins lightest colour | medium dark | medium dark |
| basal veins lightest colour | medium light | medium light |
| metasoma |
| metasoma colour pattern | entirely dark | entirely dark |
| metasoma lightest colour | dark | dark |
| metasoma base, colour pattern | entirely dark | entirely dark |
| metasoma base, light spots | n.a. | n.a. |
| metasoma base, light band | n.a. | n.a. |
Chelonus zaitzevi in published keys
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.
