Chelonus striatiscuta
authorFahringer, 1934
synonyms
body
shape2.5 mm [Te1][T14].
colorBlack [Te1].
head
shapeHead 1.2 times as wide as mesonotum, roundly narrowed behind eyes, 2.3 times as wide as long. The temples are much shorter than the transverse diameter of the eye (10:17). The width of the ocellar triangle is greater than OOL plus the diameter of the ocellus. POL is 3 times the diameter of the ocellus. Longitudinal diameter of eye 1.5 times transverse, twice as long as height of malar space. Maxillary palps equal to height of face with clypeus. Malar height equal to 0.5 longitudinal diameter of eye [T14].
sculptureThe head is finely and unevenly wrinkled behind the ocelli, with deepened punctures; the face is unevenly densely wrinkled-punctate [T14].
color
antenna
shape ♀Antennae slightly longer than head and mesosoma combined; length of 3rd antennal segment twice its width, preapical segment 1.3 times as long as wide [T14]
shape ♂Antennae 26-28-segmented [Te1].
color
mesosoma
shapeMesosoma length 1.3 times its height. Propodeum with weak transverse carina and lateral teeth [T14].
sculptureMesonotum before scutellum reticulate-rugose, scutellum longitudinally rugose [T14]. Mesopleurae not reticulate. Propodeum with anterior part irregularly rugose, without coarse reticulate sculpture [T14, key].
color
legs
shapeHind femur 3 times as long as wide. Hind tibia equal to length of hind tarsus [T14].
sculpture
colorApex of femora, fore tibiae, and basal half of hind tarsus brownish yellow. Hind tibiae with a vague yellowish band [T14]
wings
shapeThe marginal cell of the fore wing is twice as large as the 2nd submarginal cell; 1-R1 is 0.5 times the length of the pterostigma [T14]. Marginal cell slightly [NOT twice the size!] larger than 2nd submarginal cell. 2nd submarginal cell clearly longer than wide [T14, key].
colorThe wings are light [T14]. Tegulae dark, pterostigma dark brown [T14, key]
metasoma
shapeThe metasoma is oval, apically bent forward by 0.1 of its length, 1.6 times as long as wide [T14].
sculptureMetasoma with numerous, small, highly sinuous and anastomosing longitudinal rugae, reaching (gradually thinning) almost its apex [T14].
colorThe metasoma is completely dark colored [T14, key].
♀ ovipositorThe ovipositor valves are weakly or not protruding from under the carapace [T14].
♂ apertureno aperture [Te1].
other info
distributionDE [Te1]. Central Europe [T14]. DE [FE].
remarksIncomplete description [Te1].
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): | (2.2) 2.2 - 2.7 (2.8) | (2.2) 2.2 - 2.7 (2.8) |
| number of antennal segments: | 16 | (25) 25 - 28 (29) |
| head, dorsal view |
| Head width : length | very wide | very wide |
| Temples narrowing - widening | narrowing | narrowing |
| Eye length : temple length | --- | --- |
| Roundness temple | strong, medium, weak | strong, medium, weak |
| POL : OD | 2 - 3, 3 - 4 | 2 - 3, 3 - 4 |
| Ocellar triangle shape | --- | --- |
| Excavation of head | --- | --- |
| head, lateral view |
| Head height : length | --- | --- |
| Eye height : length | very short | very short |
| Temple length : eye length | --- | --- |
| head, frontal view |
| Head width : height | --- | --- |
| Face width : height | --- | --- |
| 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 | short | --- |
| Penultimate segment length : width | short | --- |
| Length of antenna : length of body | 1: very short, 2: short | --- |
| mesosoma, lateral view |
| Length : height | short | short |
| transverse carina | weak, indistinct | weak, indistinct |
| lateral teeth | present | present |
| mesosoma, ventral view |
| Prepectal carina lamelliform | indistinct | indistinct |
| legs |
| Hind femur length : width ratio | short | short |
| Hind tibia length : hind tarsus length ratio | medium | medium |
| Hind tibia (longest) spur length : metatars length ratio | | |
| wings |
| Vein 1-R1 length : pterostigma length | short | short |
| Vein r length : vein 3-SR length | | |
| Shape vein SR1 (straight / concave / convex) | | |
| S-shape vein SR1 | --- | not S-shaped, apically convex |
| cell M : cell Sm2 | Sm2 medium | Sm2 medium |
| Pterostigma length : width ratio | --- | --- |
| Angle between radial vein (r) : vein 1-R1 | --- | --- |
| metasoma, dorsal view |
| Length : width ratio of metasoma | short | short |
| 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 | just/slightly 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 | fine |
| clypeus |
| coarseness punctation | --- | --- |
| density punctation | --- | --- |
| face |
| sculpture type | rugose, punctate | rugose, punctate |
| sculpture direction | irregular | irregular |
| vertex and temple |
| sculpture type | rugulose | rugulose |
| mesonotum |
| sculpture type | --- | --- |
| 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 | rugulose | rugulose |
| coarse / fine boundary | mid (50 - 70%), apex (>70%) | mid (50 - 70%), apex (>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 | medium light | medium light |
| hind femur color pattern | tip light | tip light |
| hind tibia lightest colour | medium light | medium light |
| hind tibia color pattern | narrow light ring | narrow light ring |
| hind basitarsus lightest colour | dark | dark |
| hind tarsus segment 2-3 lightest colour | dark | 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 striatiscuta in published keys
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.