Leptus molochinus (C. L. Koch, 1837)

Haarder, Simon & Mąkol, Joanna, 2022, Terrestrial Parasitengona mites (Trombidiformes) of Denmark - new data on parasite-host associations and new country records, Acarologia 62 (2), pp. 508-520 : 511-512

Leptus molochinus (C. L. Koch, 1837) (= L. ignotus )

Species distributed in the Palaearctic and in the Nearctic region ( Greenland), known from all active life instars ( Mąkol and Wohltmann 2012, and references therein). Hitherto records refer to parasitism of larvae on Hemiptera , Orthoptera , Dermaptera , Diptera , Coleoptera , Lepidoptera , Opiliones , Araneae , Trombidiformes : Asilus sp. ( Diptera : Asilidae ), Lagria hirta (L.) ( Coleoptera : Tenebrionidae ), Athous (Athous) haemorrhoidalis (Fabricius, 1801) ( Coleoptera : Elateridae ) ( Oudemans 1905, pro L. ignotus ); Phalangiidae (Opiliones) ( Bruyant 1909, pro L. phalangii ); Cantharis (Cantharis) rufa L. ( Coleoptera : Cantharidae ), Sitona striatellus Gyllenhal, 1834 ( Coleoptera : Curculionidae ), Nabis sp. ( Hemiptera : Nabidae ), Phalangium sp. ( Opiliones : Phalangiidae ), Araneae indet. ( Bruyant 1911, pro L. ignotus ); Haematopota pluvialis L. ( Diptera : Tabanidae ), Orchestes (Orchestes) pilosus (Fabricius, 1781) ( Coleoptera : Curculionidae ), Opilio parietinus (De Geer, 1778) ( Opiliones : Phalangiidae ), Lachnus roboris (L.) ( Hemiptera : Aphididae ), Aphidoidea indet. ( Hemiptera ), Elateride indet. ( Coleoptera ), Centrotus cornutus (L.) ( Hemiptera : Membracidae ), Opilio sp. ( Opiliones : Phalangiidae ), Athous (Haplathous) subfuscus (O. F. Müller, 1764) ( Coleoptera : Elateridae ), Melanoplus bivittatus (Say, 1825) ( Orthoptera : Acrididae ), Phratora (Phyllodecta) laticollis

(E. Suffrian, 1851) ( Coleoptera : Chrysomelidae ), Forficula auricularia L. ( Dermaptera : Forficulidae ), Charletonia globigera (Berlese, 1885) , Erythraeus phalangoides (De Geer,

1778) ( Trombidiformes : Erythraeidae ) ( Oudemans 1912, pro L. ignotus ); Noctua pronuba

(L.), Apamea crenata (Hufnagel, 1766) ( Lepidoptera : Noctuidae ), Agriphila aeneociliella (Eversmann, 1844) ( Lepidoptera : Cramibidae) ( Cooreman 1945, pro L. ignotus ); Pachygnatha clercki Sundevall, 1823 ( Araneae : Tetragnathidae ) ( Parker 1962, pro L. ignotus ); Leucania impura (Hübner, 1808) , Leucania lithargyria (Esper, 1788) , Hoplodrina sp. , Xestia triangulum (Hufnagel, 1766) ( Lepidoptera : Noctuidae ), Noctuidae indet. ( Lepidoptera ) ( Southcott 1992, pro L. ignotus ignotus ); Anoscopus albifrons (L.) ( Hemiptera : Cicadellidae ) ( Fain and Baugnee 1996, pro L. ignotus ); Phalangium opilio L. ( Opiliones : Phalangiidae ) ( Fain and Amico

1997, pro L. ignotus ); Mitopus morio (Fabricius, 1779) ( Opiliones : Phalangiidae ) ( Gabryś et al. 2011); Cicadellidae indet. ( Hemiptera ), Miridae indet. ( Hemiptera ), Anthicidae indet. ( Coleoptera ), Anystidae indet. ( Trombidiformes : Erythraeidae ), Tetragnatha sp. ( Araneae : Tetragnathidae ) ( Mąkol and Felska 2011); Erythraeus aoki Shiba, 1972 , Erythraeus cinereus

(De Geer, 1778), Leptus molochinus (C. L. Koch, 1837) , Leptus trimaculatus (Rossi, 1794) , Leptus vertex (Kramer, 1886) , Abrolophus quisquiliarus (Hermann, 1804) ( Trombidiformes : Erythraeidae ) (Mąkol et al. 2012).

Hosts listed by Bruyant (1911) need verification due to the synonymy of Erythraeus ignotus Oudemans, 1903 with Rhyncholophus nemorum C. L. Koch, 1836 and Leptus phalangii [part.] proposed by this author and not accepted in the present work (see also: Łaydanowicz and Mąkol 2010, Gabryś et al. 2011); 2/. according to Southcott (1992) a list of host-parasite associations provided by Oudemans (1912) may refer to other than L. molochinus species.

Records:

• Tachycixius pilosus (Olivier, 1791) ( Hemiptera : Cixiidae ), Hanstholm, 08 July 2020, leg. Linda Kjaer-Thomsen and Lars Thomas; 1 H/1 LV

• Lagria hirta (L.) ( Coleoptera : Tenebrionidae ), Bulbjerg, 07 July 2020, leg. Linda Kjaer-Thomsen and Lars Thomas; 2 H/2 LV

• Opiliones indet. Staunings Ø (Solrød), 25 July 2019, leg. Linda-Kjaer Thomsen and Lars Thomas; 1 H/1 LV/dorsal side of cephalothorax, close to the base of ocularium

• Araneae indet., juv.; Fur, Langstedhuller, 10 July 2020, leg. Linda Kjaer-Thomsen and Lars Thomas; 1 H/1 LV

Note: New host record ( Tachycixius pilosus ).