Chelonus sochiorum
authorTobias, 2005
synonyms
body
shape♂ 3.4 mm [T14]. ♀ 3.4mm [T25].
colorBody black, uniformly not roughly sculpted [T25][T14].
head
shapeHead roundly narrowed behind eyes, 1.2 times as wide as mesonotum, 1.9 times as wide as long at the temples and 2.8 times as long in the middle, 1.3 times as wide as high. Base of ocellar triangle 1.5 times OOL. POL is 3 times the diameter of the ocellus. Longitudinal diameter of eye 1.5 times transverse, 2.5 - 2.7 times height of malar space. The width of the face is twice its height and 1.2 times the longitudinal diameter of the eye. The maxillary palps are as long as the width of the face. Proboscis weakly protruding [T25][T14].
sculptureThe face and vertex are finely transversely wrinkled [T14][T25]. Temples with thin and numerous vertical rugae [T25].
color
antenna
shape ♀Antennae equal to body length, 27-segmented; 3rd segment 2.5 times as long as wide, 7-9th segments twice as long, 21-23rd segments 1.5 times their width, pre-apical slightly less than twice, apical ones twice their width [T25].error, must be male, see comments
shape ♂Antennae equal to body length, 27-segmented; 3rd segment 2.5 times as long as wide, 21st to 23rd segments 1.5 times, preapical segments twice as long as wide [T14].
color
mesosoma
shapeMesosoma length 1.6 times its height. Propodeum with weak transverse carina and shallow lateral teeth [T25][T14].
sculptureMesonotum non-coarsely reticulate and rugose in front of scutellum. Scutellum longitudinally rugose, with a smoothed sculpture in the middle [T14] [T25]. Mesopleurae densely fine-grained sculptured, with broadly transversely rugose sternauli [T25].
color
legs
shapeHind femur 3 times as long as wide. Inner spur of hind tibia 0.4 times as long as hind metatarsus. The hind tarsus is shorter than the hind tibia; its 5th segment is equal to the 3rd one [T14]. Length of hind femur 3 times its width, hind tibia 5 times its width. Hind tibia considerably narrower than hind femur (7.5: 10), its inner spur 0.4 times as long as 1st segment of hind tarsus. Hind tarsus slightly shorter than hind tibia; 5th segment of hind tarsus equal to 3rd, less than 2nd [T25].
sculpture
colorFemora and tibiae brownish yellow, apices of middle and hind tibia brown [T25][T14]. Fore femora brown at apex, the tarsi are dark brown [T25].
wings
shapeMarginal cell 2.5 times as long as 2nd submarginal cell, 1-R1 as long as pterostigma. r slightly longer than 3-SR and 4 times shorter than SR1, twice as long as 2-SR [T25][T14].
colorThe wings are slightly darkened [T25][T14]. The pterostigma and costal vein are brown, the veins are light brown [T25].
metasoma
shapeMetasoma oval, twice as long as wide. Metasomal length almost 5 times its height. Metasoma bent apically 0.17 times its length [T25][T14].
sculptureMetasoma with non-coarse, tortuous and anastomosing longitudinal rugae reaching its middle [T14].
color
♀ ovipositor
♂ apertureApical aperture occupies slightly more than 0.3 posterior width of metasoma. Aperture is oval, located in the middle of the posterior surface of the metasoma; its width is almost twice its height [T14]. The aperture is oval, located in the middle of the posterior part of the abdomen; its width is slightly more than 0.3 times the width of the abdomen (4: 11), its height is almost twice its width (5:3) [T25].
other info
distributionSE [FE]
remarksIt differs from C. latrunculus with light-colored legs in transversely wrinkled sternauli, a long radial cell, and a radial vein that runs obliquely to the longitudinal axis of the pterostigma (in M. latrunculus, the pterostigma is much longer than the metacarp, and the radial vein goes perpendicular to the longitudinal axis of R1) [T25]. Type description for female, but figures and key [T14] for male? Must be an error as description and figures clearly describe a male [Arp].
hosts
type description
Microchelonus sochiorum Tobias, sp. n. (рис. 4, 2—6).
Голотип: ♀, Краснодарский край, Сочи (Лазаревское), лес по склону западнее Мирного. 16 VСI 1986 (В. Тобиас).
Самка. Длина тела 3.4 мм. Голова за глазами округленно суженная, в 1.2 раза шире среднеспинки; ее ширина в 1.3 раза больше высоты, ширина при рассмотрении сверху в 1.9 раза больше длины в области висков и в 2.8 — длины посередине. Основание глазкового треугольника в 1.5 раза больше OOL. POL в 3 раза больше диаметра глазка. Продольный диаметр глаза в 1.5 раза больше поперечного и в 2.7 — высоты щеки. Ширина лица вдвое больше его высоты и в 1.2 — продольного диаметра глаза. Челюстные щупики равны ширине лица. Хоботок слабо выступает. Усики равны длине тела, 27-члениковые; длина 1-го членика жгутика в 2.5 раза больше его ширины, 5—7-го члеников — вдвое, 19—21-го — в 1.5 раза больше их ширины, предвершинного — немного, вершинного — вдвое больше их ширины. Длина груди в 1.6 раза больше ее высоты. Проподеум со слабым поперечным валиком и пологими боковыми зубцами. Радиальная ячейка в 2.5 раза больше 2-й радиомедиальной, ее передник край (метакарп) равен длине птеростигмы. 1-й отрезок радиальной жилки немного длиннее 2-го, ее 3-й отрезок в 4 раза длиннее 1-го и вдвое длиннее 1-й радиомедиальной жилки. Длина заднего бедра в 3 раза больше его ширины, задней голени — в 5 раз. Задняя голень значительно уже заднего бедра (7.5 : 10), ее внутренняя шпора равна 0.4 длины 1-го членика задней лапки. Задняя лапка немного короче задней голени, 5-й членик задней лапки равен 3-му, меньше 2-го. Брюшко овальное, апикально подогнуто на 0.17 своей длины; его длина вдвое больше ширины, почтн в 5 раз больше высоты. Вершинное абдоминальное отверстие овальное, расположено посереднне задней части брюшка; его ширина немного больше 0.3 ширины брюшка (4 : 11), высота почтн вдвое больше ширины (5 : 3).
Тело равномерно негрубо скульптированное. Лицо и темя за глазкйми тонко поперечно-морщинистое. Виски в тонких и многочисленных вертикальных складках. Среднеспинка перед щитиком в негрубой ячеистой морщинистости. Щитик продольно-морщинистый, посередине со сглаженной скульптурой. Мезоплевры густо мелкозернисто скульптированные, с нiироко поперечно-морщинистыми стернаулями. Брюшко в негрубых многочисленных извилнстых и анастомозирующих продольных складках, достигающих его середины. Окраска тела черная. Бедра и голени коричневато-желтые, передние бедра на вершине и верщины средних и задних голеней коричневые. Лапки темно-коричневые. Крылья слабоза-темненные; птеростигма и костальная жилка коричневые, жилки в основании крыла светло-коричневые, в его вершинной половине светло-коричневые.
Похож на дальневосточный M.bicoloripes Tobias (Тобиас, 1990). Отличается от него не расширенным на вершине брюшком, крайне редко встречающимся в роде Microchelonus признаком — широкими поперечно-морщинистыми стернаулями, одноцветными задними бедрами. От широко распростра-ненного в Палеарктике вида М. latrunculus Marsh, со светлоокрашенными ногами отличается поперечно-морщинистыми стернаулями, длинной радиальной ячейкой и радиальной жилкой, которая идет косо к продольной оси птеростигмы (у М. latrunculus птеростигма значительно длиннее метакарпа, а радиальная жилка идет отвесно к продольной оси метакарпа).
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): | (3) 3 - 3.6 (3.8) | (3) 3 - 3.6 (3.8) |
| number of antennal segments: | 16 | (25) 25 - 28 (29) |
| head, dorsal view |
| Head width : length | wide | wide |
| Temples narrowing - widening | strongly narrowing, narrowing | strongly narrowing, narrowing |
| Eye length : temple length | 0.75 - 1.0, 1.0 - 1.25 | 0.75 - 1.0, 1.0 - 1.25 |
| Roundness temple | weak, very weak | weak, very weak |
| POL : OD | 2 - 3, 3 - 4 | 2 - 3, 3 - 4 |
| Ocellar triangle shape | narrow, wide | narrow, wide |
| Excavation of head | 15 - 25%, 25 - 35% | 15 - 25%, 25 - 35% |
| head, lateral view |
| Head height : length | --- | --- |
| Eye height : length | --- | --- |
| Temple length : eye length | --- | --- |
| head, frontal view |
| Head width : height | narrow, wide | narrow, wide |
| Face width : height | wide | 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 | --- | short, medium |
| Penultimate segment length : width | --- | long |
| Length of antenna : length of body | --- | 4: very long |
| mesosoma, lateral view |
| Length : height | --- | --- |
| transverse carina | --- | --- |
| lateral teeth | --- | --- |
| mesosoma, ventral view |
| Prepectal carina lamelliform | indistinct | indistinct |
| legs |
| Hind femur length : width ratio | short | short |
| Hind tibia length : hind tarsus length ratio | medium, long | medium, long |
| Hind tibia (longest) spur length : metatars length ratio | short | short |
| wings |
| Vein 1-R1 length : pterostigma length | medium, long | medium, long |
| Vein r length : vein 3-SR length | short | short |
| Shape vein SR1 (straight / concave / convex) | straight or S-shaped | straight or S-shaped |
| S-shape vein SR1 | not S-shaped | not S-shaped |
| cell M : cell Sm2 | Sm2 small | Sm2 small |
| Pterostigma length : width ratio | medium | medium |
| Angle between radial vein (r) : vein 1-R1 | blunt | blunt |
| metasoma, dorsal view |
| Length : width ratio of metasoma | medium, long | medium, long |
| Shape of metasoma | widest in middle | widest in middle |
| metasoma, lateral view |
| Length : height ratio of metasoma | long | long |
| posterior : anterior height ratio of metasoma | small, medium | small, medium |
| Position of maximum height | medium-posterior | medium-posterior, posterior |
| metasoma, ventral view |
| Metasoma posteriorly curved forwards | (distinctly) 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. | vertical carina |
| sculpture |
| head |
| general coarseness | fine | fine |
| clypeus |
| coarseness punctation | --- | --- |
| density punctation | --- | --- |
| face |
| sculpture type | rugose | rugose |
| sculpture direction | transverse | transverse |
| vertex and temple |
| sculpture type | transverse rugulose | transverse rugulose |
| mesonotum |
| sculpture type | --- | --- |
| scutellum |
| middle | smooth | smooth |
| 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%) | 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 | entirely light | entirely light |
| hind femur lightest colour | medium light | medium light |
| hind femur color pattern | entirely light | entirely light |
| hind tibia lightest colour | medium light | medium light |
| hind tibia color pattern | wide light base | wide light base |
| hind basitarsus lightest colour | dark | dark |
| hind tarsus segment 2-3 lightest colour | dark | dark |
| wings |
| middle veins lightest colour | medium light | medium light |
| 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 sochiorum in published keys
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.