Diphyus quadripunctorius (Müller, 1776)

Diphyus quadripunctorius (Müller, 1776) View in CoL

Notes

Similar to D. fossorius . The most common species with winter and summer diapause throughout Europe, specialised in natural caves, but also present in buildings and fortifications. Enormous aggregations can be reached. A group of 791 individuals was counted at one locality in 2022, which is probably the largest cluster of ichneumonids ever measured. Long-term research in the Netherlands shows how mortality can become as high as 50 %, which is remarkable in comparison to the hibernating species associated with other hibernacula ( Vergoossen et al. In press). One third of the specimens reported in this catalogue belong to this species.

Status: Confirmed.

Records: Albania (1), Austria (13), Belgium (165), Bosnia and Herzegovina (1), Bulgaria (2), Croatia (2), Czechia (48), Denmark (1) **, France (27), Germany (63), Grand Duchy of Luxembourg (9), Hungary (5), Italy (27), Norway (10) *, Poland (9), Portugal (2), Romania (49), Serbia (5), Slovenia (5), Spain (16), Sweden (1) *, Switzerland (16), the Netherlands (154), Ukraine (7) *, United Kingdom (14).

First record: Ca. 1865 ( Frivaldszky 1865, Hungary).

Hibernacula: B (409), C (9250), DT (3), S (1), U (5).

Sources: Frivaldszky (1865) [ Ichneumon natatorius ], Mocsáry (1877) [ Amblyteles natatorius Fabr. ], Szilády (1914) [ A. quadripunctorius Müll. ], Jeannel (1926) [ A. quadripunctorius Müll. ], Buresch (1934) [ A. bipunctatus ], Leruth (1939) [ A. quadripunctorius Müll. ], Collart (1941) [ A. quadripunctorius Müll. ], Franciscolo (1955) [ A. quadripunctorius Müll. ], Kowalski (1955) [ A. quadripunctorius Müll. ], Decou and Decou (1961) [ A. quadripunctorius Müll. ], Guéorguiev and Beron (1962) [ A. bipunctatus ], Aellen and Strinati (1962) [ A. quadripunctorius Müll. ], Dobat (1975) [ A. quadripunctorius Müll. ], Strouhal and Vornatscher (1975) [ A. quadripunctorius ], Weber and Weber (1986) [ A. quadripunctorius Müll. ], Weber (1989), Selfa and Escolà (1991), Bertolani et al. (1994), Šedivý (2001), Šedivý and Dvořák (2002), Ozimec (2002), Parenzan and Belmonte (2002), Rathgeber (2004), Kubátová and Dvořák (2005), Novak (2005) [ A. quadripunctorius Müll. ], Dethier (2007), Lana et al. (2008) [ A. quadripunctorius ], Ortiz-Sánchez and Fernández (2008), Novak et al. (2010), Fernández and Ortíz-Sánchez (2013), Penado et al. (2013), Sebald and Weber (2013), Weber (2014), Fabbri and Poletti (2015), Lana and Sella 2016, Presetnik et al. (2016), Dundarova et al. (2018), Baird and Shaw (2019), Žikić et al. (2020), Lenart et al. (2022), Verheyde and Quicke (2022), Canciani and Cechini (2023), Vesović et al. (2024); Unpublished: Artsobservasjoner, BioPortal, iNaturalist, Insecte. org, Naturbasen, Naturgucker, Observation. org, Pers. obs., Pers. obs. (G. Artmann), UKRbin.

Also mentioned in: Bokor (1921) [ A. quadripunctorius Müll. ], Strinati (1966) [ A. quadripunctorius ], Dvořák (2002), Weber (2014), Beron (2016), Vas and Kutasi (2016), Kocot-Zalewska and Domagała (2020), Lana et al. (2021), Vergoossen et al. (In press).