Ophion tenuicornis Johansson & Cederberg 2019, sp. nov.
Creators: name: Johansson, Niklas
name: Cederberg, Björn
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Ophion
Ophion tenuicornis

description: Ophion tenuicornis Johansson sp. nov.
urn:lsid:zoobank.org:act: C1A3799F-344E-49E3-AA66-3083A9D3FF27
Figs 8C, 10L, 13A, 44
Diagnosis
Ophion tenuicornis Johansson sp. nov. is one of the species in an aggregate previously treated under the name Ophion parvulus. Ophion tenuicornis Johansson sp. nov. is easily distinguished from the other species in the aggregate currently known from Sweden by the more elongate and strongly pilose flagellomeres, and from O. costatus and O. parvulus also by the considerably narrower temple in lateral view.
Etymology
The species has very slender antennae.
Material examined
> 100 ♀♀, 27 ♂♂ (Sweden); 3 ♀♀ (Germany); 1 ♀, 6 ♂♂ (Norway); 3 ♀♀ (Lithuania).
Type material
Holotype SWEDEN • ♀; Öland, Mörbylånga, Strandskogen; 56.702° N, 16.494° E; 7 Sep. 2016; B. Andersson leg.; MV-light in garden on sandy soil close to deciduous forest; STI-NJBC252; NHRS-HEVA000008727.
Paratypes SWEDEN • 2 ♀♀; Uppland, Rådmansö, Strömsborg; 59.711° N, 18.962° E; 14 Aug.–7 Sep. 2016; N. Ryrholm and C. Källander leg.; MV-light trap in coastal mixed forest; STI-NJBC243, STI-NJBC248; NHRS-HEVA000008728, NHRS-HEVA000008729 • 1 ♀; Uppland, Norrtälje, Väddö Skjutfält; 59.939° N, 18.914° E; 4 Sep.–16 Oct. 2016; N. Ryrholm and C. Källander leg.; Military shooting range, MV-light trap; STI-NJBC244; NHRS-HEVA000008730 • 1 ♀; Skåne, Ystad, Spraggehusen; 55.442° N, 14.246° E; 29 Jul.–28 Aug. 2016; N. Ryrholm and C. Källander leg.; MV-light trap in sanddunes; STI-NJBC245; NHRS-HEVA000008731 • 1 ♀; Gotland, Öja, Gisle; 57.049° N, 18.289° E; 29 Sep.–23 Oct. 2007; N. Ryrholm and C. Källander leg.; MV-light trap; STI-NJBC246; NHRS-HEVA000008732 • 1 ♀; Gotland, Sundre, Suders; 56.945° N, 18.303° E; 29 Sep.–26 Oct. 2007; N. Ryrholm and C. Källander leg.; MV-light trap in deciduous woodland; STI-NJBC247; NHRS-HEVA000008733 • 1 ♀; Gotland, Sundre, Barrshage; 56.922° N, 18.186° E; 10 Sep.–9 Oct. 2006; N. Ryrholm and C. Källander leg.; MVlight trap in wet meadows; NHRS-HEVA000008734 • 1 ♀; Öland, Borgholm, Hälludden Byxelkrok; 57.356° N, 17.058° E; 22–24 2017; R. Isaksson leg.; MV-light; NHRS-HEVA000008735 • 1 ♀; Norrbotten, Övertorneå, Soukolojoki; 66.472° N, 23.632° E; 2 Aug.–5 Oct. 2017; N. Ryrholm and C. Källander leg.; MV-light trap; NHRS-HEVA000008736 • 1 ♀, 2 ♂♂; Uppland, Norrtälje, Väddö Skjutfält; 59.939° N, 18.914° E; 29 Jul.–18 Sep. 2017; N. Ryrholm and C. Källander leg.; MV-light trap in coastal military shooting range; NHRS-HEVA000008737 to NHRS-HEVA000008739 • 2 ♀♀; Skåne, Ystad, Spraggehusen; 55.442° N, 14.246° E; 28 Aug.–30 Sep. 2006; N. Ryrholm and C. Källander leg.; MV-light trap in sanddunes; NHRS-HEVA000008740, NHRS-HEVA000008741 • 1 ♂; same data as for holotype; 1 Aug.–28 Jul. 2016; B. Andersson leg.; MV-light in garden on sandy ground close to deciduous, oak dominated forest, NHRS-HEVA000008742 • 1 ♀; Gotland, Öja, Petesviken; 57.004° N, 18.295° E; 5 May–13 Oct. 2013; N. Ryrholm and C. Källander leg.; MV-light trap; NHRS-HEVA000008743 • 1 ♂; Öland, Mörbylånga, Nedra Västerstad; 56.416° N, 16.411° E; 10 Jul. 2018; N. Johansson leg.; MV-light in garden surrounded by deciduous forest; NHRS-HEVA000008744.
Description
Fore wing length 15–16 mm. Antenna with 46–53 flagellomeres. First flagellomere 4.5 times as long as wide. Second flagellomere very elongate about 3.5–4.0 times as long as wide. Central flagellomeres elongate, about 2.5–3.0 times as long as wide. Apical flagellomeres approximately 2.5 times as long as wide (Fig. 8C). Apical flagellomeres in female, less so in males, with long prominent pilosity. Length of pilosity in females at least 0.5 width of flagellomere (Fig. 8C). Head narrow behind eyes, in lateral view with temple 0.2–0.3 times as long as compound eye in females, slightly longer in males, 0.4–0.5 times the lenght of the compound eye. Ocelli in female large, partly covering the inner margin of compound eye in dorsal view, the distance between ocelli about 0.3 times the diameter of ocelli. Malar space about 0.1 times as long as mandibular base in female and about 0.3 times in male. Mandibular gape right-angled, with internal angles. Wing membrane clear. Ramellus usually distinct, reaching 0.2–0.3 the width of discosubmarginal cell but sometimes small or absent. Radius evenly curved (Fig. 13A). Mesopleuron weakly shagreened with deep, distinct punctures. Interstices between punctures about equal to their diameter. Epicnemial carina, in antero-ventral view, with pleurosternal angles obviously anterior to sternal angles. Pleurosternal angles rounded, slightly obtuse. Scutellum with lateral carinae only indicated basally. Propodeum with very weak rugose structure, shining with anterior and posterior transverse carina strongly raised (Fig. 10L). Longitudinal carinae delimiting area superomedia and lateral longitudinal carinae sometimes weak or absent, but normally clearly indicated at the junction with the posterior transverse carina. Hind trochantellus shorter than wide in dorsal view. Legs normal with hind femur about 6.0–7.0 times as long as wide. Sclerotised part of first sternite ending level or slightly posterior to spiracle. Inner spur of hind tibia as long as 0.4 times metatarsus.
Colour
Body testaceous. If infuscate or pale markings occur, they are usually far less distinct than in other species of the aggregate. Mandibular teeth black. Ovipositor brownish, slightly contrasting with the more testaceous posterior metasomal segments.
DNA barcode
The DNA barcode sequences of nine Swedish specimens of Ophion tenuicornis Johansson sp. nov. are available at the BOLD systems database (www.boldsystems.org, BIN. BOLD: ACK3000. Specimen codes: STI-NJBC: 243–248, 250–252).
Ecology
The flight period is late summer and autumn. One female in NHRS was reared from Thyatira batis (Linnaeus, 1758) and one female was reared from the same host in HSC. This is notable since only the two species of the subgenus of Platophion are known to parasitize the subfamily Thyatirinae. Both reared specimens are rather small, which suggests the existence of additional hosts.
Distribution in Sweden
Occurs commonly all over the country, but rarer in the north.
description: Published as part of 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, pp. 1-136 in European Journal of Taxonomy 550 on pages 104-106, DOI: 10.5852/ejt.2019.550, http://zenodo.org/record/3476402