Ophion dispar Brauns, 1895

Johansson, Niklas & Cederberg, Björn, 2019, Review of the Swedish species of Ophion (Hymenoptera: Ichneumonidae: Ophioninae), with the description of 18 new species and an illustrated key to Swedish species, European Journal of Taxonomy 550, pp. 1-136 : 62-64

Ophion dispar Brauns, 1895

Figs 6D, F , 9C , 10K , 31 A–B

Ophion dispar Brauns, 1895: 42 .

Material examined

Holotype, ♂ ( HNHM); 2 ♂ ♂ ( Sweden).

Diagnosis

Fore wing length 11 mm. Antenna with 44 flagellomeres. First flagellomere 3.0 times as long as wide. Central flagellomeres stout, about 1.2–1.3 times as long as wide. Subapical flagellomeres approximately 1.4 times as long as wide. Temple quite buccate, in lateral view 0.7 times as long as compound eye. Gap between compound eye and lateral ocellus 0.3 times the diameter of ocellus. Face below antennal sockets polished with very large and deep punctures ( Fig. 31B ). Malar space very long, about 0.8 times as long as mandibular base in male. Mandibular gape right-angled, with internal angles. Wing membrane clear. Ramellus very long, reaching 0.6 times the width of the discosubmarginal cell. Radius evenly curved. Nervellus broken above the middle by the discoidella. Mesopleuron polished with deep, large, regular punctures, space between punctures equal to their diameter. Epicnemial carina, in antero-ventral view, with pleurosternal angles distinctly anterior to sternal angles. Pleurosternal angles weakly defined and obtuse ( Fig. 9C ). Scutellum with strongly raised lateral carinae along its entire length ( Fig. 6D ). Propodeum with large distinct punctures, shining. Posterior transverse carina complete but weak in the Swedish specimens (stronger in the holotype). Anterior transverse carina absent laterally, only present centrally. Longitudinal carinae entirely absent ( Fig. 10K ). Hind trochantellus shorter than wide in dorsal view. Legs normal with hind femur about 7.0 times as long as wide. Inner spur of hind tibia long, about 0.5 times as long as metatarsus. Sclerotised part of first sternite ending distinctly posterior to spiracle at a distance about three times the distance between the spiracle and the lower margin of the first tergite ( Fig. 6F ).

Colour

Body testaceous. Head with inner and outer eye margins yellow ( Fig. 31 A–B). Mandibular teeth black.

DNA barcode

The DNA barcode sequence of one Swedish specimens of Ophion dispar is available at the BOLD systems database (www.boldsystems.org, BIN. BOLD: ADG0606. Specimen code: STI-NJBC: 85).

Ecology

The two known Swedish males were collected by a light trap during June in a semi-open mixed forest. Otherwise, nothing is known about the ecology of this species.

Distribution in Sweden

Very rare and only known from the province of Uppland in the eastern part of Central Sweden.

Remarks

Easily distinguished from other Ophion species by the placement of the spiracle on the very elongate first tergite, the carination of the propodeum, the shape of the epicemial carina and the densely and deeply punctate mesosoma and face. The first author has studied a potential female of this species from Croatia. The specimen has 52 flagellomeres and the lateral carinae of scutellum weaker, but still clearly present. The posterior margin of the first sternite is further away from the posterior margin of the first tergite than in the studied males, but the first sternite is still ending posterior to the spiracle at a distance of about 2.0 times of the distance between hind margin of the first sternite and hind margin of the first tergite. In other respects similar to the male described here.

Figures

Fig. 6. A–D. Scutellum, dorsal view. A. Ophion luteus (Linnaeus, 1758). B. O. areolaris Brauns, 1889. C. O. inclinans Johansson sp. nov., holotype, ♀ (NHRS-HEVA000008667). D. O. dispar Brauns, 1895. E–H. Firsttergite, lateral view.E. O.inclinansJohanssonsp.nov.,holotype,♀ (NHRS-HEVA000008667). F. O. dispar. G. O. artemisiae Boie, 1855. H. O. luteus. I–J. Shape of male parameres, lateral view. I. Ophion sp. cf. pseudocostatus Meyer, 1935. J. O. artemisiae.

Fig. 9. Epicnemial carina, antero-ventral view of female. A. Ophion splendens Johansson sp. nov., paratype, ♀ (NHRS-HEVA000008708). B. O. mocsaryi Brauns, 1889. C. O. dispar Brauns, 1895. D. O. parvulus Kriechbaumer, 1879. E. O. slaviceki Kriechbaumer, 1892. F. O. angularis Johansson & Cederberg sp. nov., paratype, ♀ (MZLU 6366:3). G. O. crassicornis Brock, 1982. H. O. areolaris Brauns, 1889. I. O. kallanderi Johansson sp. nov., paratype, ♀ (MZLU 6371:5).

Fig. 10. Generalized carination of propodeum in females, posterodorsal view. A. Ophion luteus (Linnaeus, 1758)/O. scutellaris Thomson, 1888/O. obscuratus Fabricius, 1792. B. O. costatus Ratzeburg, 1848. C. O. brocki Johansson sp. nov., paratype, ♀ (NHRS-HEVA000008633). D. O. confusus Johansson sp. nov., holotype, ♀ (NHRS-HEVA000008637). E. O. crassicornis Brock, 1982. F. O. artemisiae Boie, 1855. G. O. ellenae Johansson sp. nov., paratype, ♀ (NHRS-HEVA000008655). H. O. perkinsi Brock, 1982. I. O. ocellaris Ulbricht, 1926. J. O. areolaris Brauns, 1889. K. O. dispar Brauns, 1895. L. O. tenuicornis Johansson sp. nov., paratype, ♀ (NHRS-HEVA000008743). M. O. longigena Thomson, 1888. N. O. brevicornis Morley, 1915. O. O. forticornis Morley, 1915.

Fig. 31. Ophion dispar Brauns, 1895, ♂. A. Habitus lateral view. B. Head frontal view. Scale bar: A = 1 mm.