Ophion inclinans Johansson

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: 67-69

publication ID

https://doi.org/10.5852/ejt.2019.550

publication LSID

lsid:zoobank.org:pub:F8707194-B55E-48CA-8FE0-4CD0D023C217

DOI

http://doi.org/10.5281/zenodo.3477043

persistent identifier

http://treatment.plazi.org/id/53FE412C-94FB-4D9B-A4EF-10EA7145189A

taxon LSID

lsid:zoobank.org:act:53FE412C-94FB-4D9B-A4EF-10EA7145189A

treatment provided by

Plazi

scientific name

Ophion inclinans Johansson
status

sp. nov.

Ophion inclinans Johansson   sp. nov.

urn:lsid:zoobank.org:act:53FE412C-94FB-4D9B-A4EF-10EA7145189A

Figs 6C, E View Fig , 8F View Fig , 13C View Fig , 16D View Fig , 19 View Fig C–D, 33

Diagnosis

Separated from other Ophion   species by the combination of the carinated scutellum, the dorsal undulation of the first tergite, the shape of the head and placement and size of the ocelli. Very similar to Ophion pteridis   and O. vardali Johansson   sp. nov., but without infuscate areas on the mesosoma, slightly wider head in anterior view and the occipital carina usually centrally rounded or straight. From O. pteridis   it is also distinguished by the usually widely interrupted posterior transverse carina of the propodeum with the area posterior to the carina rather smooth. In all studied specimens of O. pteridis   the posterior transverse carina is complete and the area delimited by it strongly wrinkled. Also quite similar to Ophion paukkuneni Johansson   sp. nov. but with less buccate head and the lateral ocellus touching the compound eye. Perhaps most easily confused with Ophion arenarius Johansson   sp. nov., but with the flagellomeres more elongate and the head usually slightly narrower in anterior view.

Etymology

Inclinans from the dorsal undulation of the first tergite in this species.

Material examined

> 350 ♀♀, 77 ♂♂ ( Sweden); 3 ♀♀ ( Finland); 1 ♀ ( Italy); 2 ♀♀, 1 ♂ ( Estonia); 27 ♀♀, 3 ♂♂ ( Norway).

Type material

Holotype

SWEDEN • ♀; Norrbotten, Haparanda, Reikkola ; 65.818° N, 24.140° E; 9 Sep.–8 Oct. 2016; N. Ryrholm and C. Källander leg.; MV-light trap in boreal forest, meadow; STI-NJBC28; NHRS-HEVA000008667. Paratypes GoogleMaps  

SWEDEN • 1 ♀; Bohuslän, Tossene, Stora Hultet ; 58.446° N, 11.409° E; 24 Jul.–14 Sep. 2014; N. Ryrholm and C. Källander leg.; MV-light trap in farmland; NHRS-HEVA000008668 GoogleMaps   1 ♀; Norrbotten, Haparanda, Santasaari ; 65.817° N, 24.133° E; 9 Aug.–8 Oct. 2016; N. Ryrholm and C. Källander leg.; MV-light trap; STI-NJBC29; NHRS-HEVA000008669 GoogleMaps   1 ♀; Bohuslän, Tossene, Stora Hultet ; 58.446° N, 11.409° E; 15 Sep.–16 Oct. 2014; N. Ryrholm and C. Källander leg.; MV-light trap in framland; STI-NJBC18; NHRS- HEVA000008670 GoogleMaps   1 ♂; Gotland, Fleringe, Rute ; 57.834° N, 18.923° E; 17–24 Jul. 2017; J. Törnvall leg.; MV-light; NHRS-HEVA000008671 GoogleMaps   1 ♂; Gotland, Sundre, Suders ; 56.945° N, 18.303° E; 14 Jul.–17Aug. 2017; N. Ryrholm and C. Källander leg.; MV-light trap in deciduous woodland; NHRS-HEVA000008672 GoogleMaps   1 ♂; Uppland, Norrtälje, Rådmansö ; 59.708° N, 18.955° E; 10 Oct.–15 Nov. 1991; N. Ryrholm and C. Källander leg.; MV-light trap in mixed coastal forest; NHRS-HEVA000008673 GoogleMaps   1 ♀; Norrbotten, Haparanda, Reikkola ; 65.818° N, 24.140° E; 9 Sep.–8 Oct. 2016; N. Ryrholm and C. Källander leg.; MVlight trap in boreal forest, meadow; NHRS-HEVA000008674 GoogleMaps   .

Description

Fore wing length 13–17 mm. Antenna in both sexes with 50–59 flagellomeres. First flagellomere 3.5–4.0 times as long as wide. Central flagellomeres 1.8–2.0 times as long as wide ( Fig. 8F View Fig ). Subapical flagellomeres long and slender, about 3.0 times as long as wide with long prominent pilosity. Temple slightly buccate. Head in lateral view about 0.4–0.6 times as long as compound eye. Head slightly wider than long in frontal view (width/height measured from the apical margin of clypeus to the top of head about 1.25) ( Fig. 19 View Fig C–D). Ocelli in dorsal view touching compound eye in female, in male with small interstice between posterior ocellus and compound eye. Ocelli smaller than in O. pteridis   , the distance between posterior ocelli usually about 0.6–0.8 times the diameter of ocellus. Occipital carina in a majority of specimens centrally straight or rarely evenly rounded, in this respect differing from the more angled carina in O. pteridis   and O. vardali Johansson   sp. nov. Malar space about 0.1–0.2 times as long as mandibular base in female and about 0.2–0.3 times in male. Mandibular gape right-angled, with internal angles. Wing membrane clear. Ramellus distinct, reaching about 0.2–0.3 times the width of the discosubmaginal cell. Radius sinuous. Face below antennal sockets with quite scarce punctures, polished or weakly shagreened. Wing membrane clear. Mesopleuron shagreened and distinctly punctate. Spaces between punctures about equal to their diameter. Pleurosternal angles weakly obtuse to right angled, obviously anterior to sternal angles. Scutellum with distinct lateral carinae ( Fig. 6C View Fig ). Propodeum slightly coriaceous, often quite polished with anterior transverse carina strong but sometimes partly absent laterally. Posterior transverse carina often widely interrupted centrally (as in Fig. 10A View Fig ) and the area delimited by it quite smooth without any obvious wrinkles. Area superomedia often with lateral and anterior carinae. Central longitudinal carinae often distinct. Sclerotised part of first sternite ending obviously posterior to spiracle. First tergite in lateral view with slight or distinct median undulation ( Fig. 6E View Fig ). Hind trochantellus shorter than wide in dorsal view. Legs quite slender with hind femur about 7.0 times as long as wide ( Fig. 16D View Fig ). Inner spur of hind tibia 0.5 times as long as hind metatarsus.

Colour

Body testaceous. Head with inner and outer orbits yellow. Mandibular teeth black. Ovipositor sheath testaceous, of same colour as posterior metasomal segments.

DNA barcode

The DNA barcode sequences of ten Swedish specimens of Ophion inclinans Johansson   sp. nov. are available at the BOLD systems database (www.boldsystems.org, BIN. BOLD: AAH1753. Specimen codes: STI-NJBC: 15–16, 18, 20, 22, 27–29, 77, 242).

Ecology

Ophion inclinans Johansson   sp. nov. is active in late summer and autumn, August–October, in semiopen agricultural landscapes and light forests. Due to confusion with other species the host records are difficult to interpret. A female in NHRS was reared from Lacanobia contigua (Denis & Schiffermüller, 1775)   . According to Brock (1982) it has been been reared from Hadena   sp. Schrank, 1802, Ceramica pisi ( Linnaeus, 1758)   and Lacanobia oleracea ( Linnaeus, 1758)   . Some of these host records might refer to other previously undescribed species similar to O. inclinans Johansson   sp. nov.

Distribution in Sweden

This species is the most widely distributed of all Ophion   species in Sweden, but seems to be rarer in the south.

Remarks

This species has widely been treated under the name Ophion pteridis   due to a misinterpretation of the lectotype and original description of that species (see remarks under O. pteridis   and Discussion). Ophion inclinans Johansson   sp. nov. forms a very closely related species pair with O. arenarius Johansson   sp. nov. Specimens from subalpine areas in central and northern Sweden have the clypeus narrower and entirely shagreened, while it is wider and polished in typical specimens. These specimens also shows a small but consistent genetical difference from typical O. inclinans   ( Fig. 5 View Fig ) and cluster with some Finnish specimens forming two quite distinct groups. Further research is needed to clearify if these forms represent different taxa.