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Key to Dicamptus species

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera;  Superfamily: Ichneumonoidea; Family: Ichneumonidae; Subfamily: Ophioninae)

ClassificationIdentification keys (after Gauld & Mitchell, 1978)


1. Fore wing with no alar scerite in the disco-submarginal cell; ocelli strongly reduced (FI < 0.25); South Africa ... Dicamptus maxipol Rousse & van Noort


– Fore wing with one (rarely two) distinct sclerite(s) in the disco-submarginal cell; ocelli reduced to enlarged (FI ≥ 0.25) ... 2

 

2. Foreleg with 4th tarsal segment quadrate, as broad as long; metasoma in profile with tergite 3 subquadrate (Fig. a) ... Dicamptus neavei Gauld & Mitchell

 

– Foreleg with 4th tarsal segment elongate, at least 2.0 times as long as broad; metasoma in profile with tergite 3 elongate (Fig. A) ... 3

 

3. Forewing with 3rm extremely short, about as long as thickness of Rs+2r (Fig. a); M between 2m-cu and 3rm arcuate ... Dicamptus banqui Delobe

 

– Forewing with 3rm longer, at least 4.0 times as long as thickness of Rs+2r (Fig. A);M between 2m-cu and 3rm straight ... 4

 

4. Forewing with CI greater than 0.40; ICI more than 0.40 (Fig. a) ... 5

 

– Forewing with CI less than 0.40; ICI less than 0.40 (Fig. A) ... 8

 

5. Malar space about 1.25 times basal mandibular width; OOD about 0:8 times as long as maximum ocellar diameter. Mandible without a groove; metapleuron finely coriaceous; fore tibia with long scattered spines ... Dicamptus tampus Gauld & Mitchell

 

– Malar space less than 0.70 times basal mandibular width; OOD 0.6 (or less) times as long as maximum ocellar diameter (Fig. B) ... 6

 

6. Malar space 0.50-0.60 times basal mandibular width; mandible with a groove extending from upper proximal corner to centre, this groove generally bearing long pubescence (Fig. a) ... Dicamptus braunsii (Kriechbaumer)

 

– Malar space less than 0.40 times basal mandibular width; mandible without a diagonal groove, with scattered pubescence (Fig. A) ... 7

 

7. Propodeum with posterior area finely reticulate (Fig. a); mesopleuron closely and evenly punctate; anterior transverse carina of propodeum vestigial ... Dicamptus bantu Delobel

 

– Propodeum with posterior area coarsely wrinkled (Fig. A); mesopleuron puncto-alutaceous, ventrally grading to punctostriate; anterior propodeal transcarina usually complete ... Dicamptus kelnerae Delobel

 

8. Lower face 1.0 or more times as broad as high (Fig. a); fore tibia with numerous long stout spines on outer surface (Fig. b) ... Dicamptus crassellus (Morley)

 

– Lower face 0.95 or less times as broad as high (Fig. A); fore tibia unarmed or with few scattered spines (Fig. B) ... 9

 

8. Antero-distal and postero-distal sides of proximal sclerite concave so that distal angle is acute (Fig. a); distal sclerite absent; 1m-cu proximally straight, distally abruptly curved. Mesothorax ventrally black ... Dicamptus xhosa Delobel

 

– Either with antero-distal and postero-distal sides of proximal sclerite not concave so that distal angle is about 90°, or if rarely with the sides somewhat discernibly concave then distal sclerite is present; distal sclerite otherwise present or absent (Fig. A); I m-cu proximally rather evenly arcuate ... 10

 

10. Proximal sclerite large, subovate, with anterior margin parallel to Rs+2r and distal angle directed along axis of the wing (Fig. a) ... Dicamptus betsileo Delobel

 

– Proximal sclerite small to moderately large, triangular, with anterior margin at 90° to Rs+2r and with distal angle directed at about 45° to axis of wing (Fig. A) ... 11

 

11. Fore tibial spur very long, 0.8 or more times as long as 2nd fore tarsal segment (Fig. a); inner hind tibial spur 1.2 times or more as long as 2nd hind tarsal segment; forewing with ICI more than 0.30 (Fig. b) ... Dicamptus pellucidus (Kriechbaumer)

 

– Fore tibial spur less than 0.6 times as long as 2nd fore tarsal segment (Fig. A); inner hind tibial spur less than 1.1 times as long as 2nd hind tarsal segment; ICI less than 0.25 (Fig. b) ... 12

 

12. Propodeum with posterior area finely alutaceous; hind trochantellus mediodorsally more than 1.0 times as long as broad (Fig. a); posterior ocellus contiguous with the eye (Fig. b) ... Dicamptus seyrigi Delobel

 

– Propodeum with posterior area irregularly wrinkled to finely reticulate; hind trochantellus less than 0.9 times as long mediodorsally as broad (Fig. A); posterior ocellus separated from eye by about 0.1 of its diameter (Fig. B) ... 13

 

13. Distal sclerite absent; proximal sclerite posteriorly incompletely sclerotized (Fig. a) ... Dicamptus townesi Delobel

 

– Distal sclerite present; proximal sclerite posteriorly strongly sclerotized (Fig. A) ... Dicamptus pulchellus (Morley)


References

Gauld, I.D. 1979. An analysis of the classification of the Ophion genus group (Ichneumonidae). Systematic Entomology 5(1980): 59-82

Gauld, I.D. & Mitchell, P.A. 1978. The taxonomy, distribution and host preferences of African parasitic wasps of the subfamily Ophioninae (Hymenoptera, Ichneumonidae). Commonwealth Institute of Entomology, Slough, England, 287 pp.

Rousse, P. & van Noort, S. 2014. Afrotropical Ophioninae (Hymenoptera, Ichneumonidae): an update of Gauld & Mitchell's revision, including two new species and an interactive matrix identification key. ZooKeys 456: 59–73. doi:10.3897/zookeys.456.8140

Tosquinet, J. 1896. Contributions à la faune entomologique de l'Afrique. Ichneumonides. Mémoires de la Société Entomologique de Belgique 5: 1-430.

Credits

Photographs © Pascal Rousse (Iziko South African Museum)


Web author Simon van Noort (Iziko South African Museum)

 

Citation: van Noort, S. 2024. WaspWeb: Hymenoptera of the World. URL: www.waspweb.org (accessed on <day/month/year>).

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