Chelonus tatricus
authorTobias 1999
synonyms
body
shape3.4mm [T14].
colorBlack [T9].
head
shapeHead width twice its height. Temples 1.4 times as long as transverse eye diameter. Width of ocellar triangle equal to distance from it to eye plus ocellus diameter. Longitudinal eye diameter twice transverse one, 0.91 times face width. Face height 0.55 times its width, 1.4 times clypeus height [T9]. Head 1.1 times as wide as mesonotum, roundly narrowed behind eyes, twice as wide as long. 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. The longitudinal diameter of the eye is twice the transverse one, 2.5 times the height of the malar space. Face width 1.8 times its height [T14].
sculptureVertex behind ocelli and temples with numerous fine transverse rugae. Face and frons with concentric rugae more distinct on frons [T9: scaberrimus], clypeus with rather dense punctation, faintly shining [T9]. Vertex behind ocelli with fine transverse rugae, face and frons with concentric rugae, which are weaker on the face [T14].
color
antenna
shape ♀Antennae thickened in the middle, 3rd segment 4 times, 8th 3 times, 13th 1.5 times as long as wide [T9: scaberrimus]. Length of 3rd antennal segment 3 times its width [T14]. Antennae not thickened in the middle, the length of the 3rd segment is no more than 3 times its width [T14, key].
shape ♂
color
mesosoma
shapeMesosoma length 1.3 times its height. Propodeum without transverse carina, with rather small blunt lateral processes [T9: scaberrimus]. Mesosoma length 1.3 times its height. Propodeum without transverse carina, with small lateral teeth [T14].
sculptureMesonotum punctate, faintly shining, with short sinuate longitudinal rugae before scutellum. Mesopleura and propodeum with fine reticulate sculpture [T9].
color
legs
shapeHind femur 4 times as long as wide. Hind tibia as long as hind tarsus. Inner spur of hind tibia 0.4 times as long as 1st segment of hind tarsus; 5th segment of hind tarsus as long as 3rd, shorter than 2nd [T9: scaberrimus]. Hind femur 4 times as long as wide [T14].
sculpture
colorApex of fore femur and entire fore tibia brownish yellow. Tarsi dark brown. Middle and hind tibiae dark brown, with yellow band [T9].
wings
shapeMarginal cell 1.5 times as large as 2nd submarginal cell, 1-R1 0.67 times as long as pterostigma [T9][T14]. Vein r slightly longer than 3-SR; SR1 nearly straight, 3.5 times as long as 3-SR, 1.8 times as long as 2-SR. cu-a as long as 1-CU1 [T9: scaberrimus].
colorWings hyaline in basal half and infuscate in apical half. Pterostigma and veins brown, yellow at wing base; parastigma yellow [T9]. Tegulae usually dark colored [T14, key].
metasoma
shapeMetasoma elongate-oviform, more narrowing basally than apically, 1.9 times as long as wide, 2.7 times as long as high [T9]. The metasoma is elongated-ovate, strongly narrowed towards the base [T14]. Metasoma apically bent forward by 0.1 times its length, 1.9 times as long as wide [T14].
sculptureMetasoma with reticulate sculpture and two sharp oblique carinae at base, without distinct longitudinal rugae [T9].
colorThe metasoma is completely dark colored [T14, key].
♀ ovipositorProtruding part of ovipositor as long as 5th segment of hind tarsus [T9][T14].
♂ aperture
other info
distributionPL [FE].
remarksClosely related to M. scaberrimus [T9].
hosts
type description
Microchelonus tatricus Tobias, sp. n. (figure, 20)
Material. Holotype ♀, Poland, "Polen, 414, Tatra, Natl. Pk., Dol. Bialiego, 1000 m, 14.VII.1979, leg. Fischer." Deposited at NHMW.
Description. Female. Head width twice its height. Temples 1.4 times as long as transverse eye diameter. Width of ocellar triangle equal to distance from it to eye plus ocellus diameter. Longitudinal eye diameter twice transverse one, 0.91 times face width. Face height 0.55 times its width, 1.4 times clypeus height. Radial cell 1.5 times as large as 2nd radiomedial one, its anterior margin 0.67 times as long as pterostigma. metasoma elongate-oviform, more narrowing basally than apically, 1.9 times as long as wide, 2.7 times as long as high. Protruding part of ovipositor as long as 5th segment of hind tarsus. Other morphological characters as in M. scaberrimus.
Sculpture on head as in M. scaberrimus; but clypeus with rather dense punctation, faintly shining. Mesonotum punctate, faintly shining, with short sinuate longitudinal rugae before scutellum. Mesopleura and propodeum with fine reticulate sculpture. metasoma with reticulate sculpture and two sharp oblique carinae at base, without distinct longitudinal rugae.
Apex of fore femur and entire fore tibia brownish yellow. Tarsi dark brown. Middle and hind tibiae dark brown, with yellow band. Wings hyaline in basal half and infuscate in apical half. Pterostigma and veins brown, yellow at wing base; parastigma yellow.
Differential diagnosis. Closely related to M. scaberrimus described above, but differing in the characters given in the key. [Arp: tatricus not present in key!]
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 | --- |
| head, dorsal view |
| Head width : length | wide, very wide | wide, very wide |
| Temples narrowing - widening | narrowing, parallel | narrowing, parallel |
| Eye length : temple length | <= 0.75, 0.75 - 1.0 | <= 0.75, 0.75 - 1.0 |
| Roundness temple | strong, medium | strong, medium |
| POL : OD | 2 - 3, 3 - 4 | 2 - 3, 3 - 4 |
| Ocellar triangle shape | wide, very wide | wide, very wide |
| Excavation of head | 15 - 25%, 25 - 35% | 15 - 25%, 25 - 35% |
| 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 | narrow |
| 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, long | --- |
| Penultimate segment length : width | --- | --- |
| Length of antenna : length of body | --- | --- |
| mesosoma, lateral view |
| Length : height | short | short |
| transverse carina | absent | absent |
| lateral teeth | weak, small, short | weak, small, short |
| mesosoma, ventral view |
| Prepectal carina lamelliform | indistinct | indistinct |
| legs |
| Hind femur length : width ratio | long | long |
| Hind tibia length : hind tarsus length ratio | medium | medium |
| Hind tibia (longest) spur length : metatars length ratio | short | short |
| wings |
| Vein 1-R1 length : pterostigma length | medium | medium |
| 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 large | Sm2 large |
| 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 | short, medium | short, medium |
| 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 | small, medium, large |
| Aperture shape | n. a. | (nearly) round, oval, elongate - slit |
| Median process shape | n. a. | --- |
| sculpture |
| head |
| general coarseness | --- | --- |
| clypeus |
| coarseness punctation | punctate | punctate |
| density punctation | --- | --- |
| face |
| sculpture type | rugose | rugose |
| sculpture direction | diagonal/concentric | diagonal/concentric |
| vertex and temple |
| sculpture type | transverse rugulose | transverse rugulose |
| mesonotum |
| sculpture type | notauli distinct | notauli distinct |
| scutellum |
| middle | --- | --- |
| lateral | --- | --- |
| metasoma |
| base - mid sculpture | rugose / reticulate | rugose / reticulate |
| sculpture at apex | rugose, rugulose | rugose, rugulose |
| coarse / fine boundary | --- | --- |
| 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 | light | 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 | light | 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 tatricus in published keys
T14: Tobias, 2010
Palearctic species of Microchelonus Szépligeti (Hymenoptera: Braconidae, Cheloninae): key to species.
