Axysta cesta (Haliday, 1833)

Stuke, Jens-Hermann, 2022, A Second European Axysta Species (Diptera: Ephydridae), Acta Zoologica Academiae Scientiarum Hungaricae 68 (2), pp. 159-168 : 160

Axysta cesta (Haliday, 1833)

( Figs 2–3 , 6 )

Ephydra cesta Haliday, 1833: 177 ; type-locality: “Holywood in Downshire” [ Northern Ireland]; lectotype m, des. by CLAUSEN 1983, deposited in National Museum of Ireland, Dublin ( DE COURCY WILLIAMS & O’CONNOR 1989).

Material examined. GERMANY: 1 f, 23.v.2010, Bavaria, Isaraue NW Rosenau (4 km s Moosburg a. d. Isar) [48,442°N 11,932°E]; 1 m, 23.v.2010, Bavaria, gravel pit 2 km W Mitterlern (11 km ESE Freising) [48,387°N 11,898°E]; 1 m, 3.iv.2007, Bavaria, Inning am Ammersee, Martinsberg [48,088°N 11,163°E], 550 m, leg. W. Schacht; 1 m, 29.iv.2007, Bavaria, Inning, Martinsberg, Toteisloch, swamp [48,085°N 11,169°E], 570 m, leg. W. Schacht; 1 f, 9.viii.2014, Brandenburg, Kolpinsee [52,349°N 12,798°E]; 1 f, 12.v.2013, Mecklenburg-Western Pomerania, Peene valley S Trantow [53,967°N 13,200°E]; 1 m, 26.v.2003, Lower Saxony, Ahlhorner Teiche [52,928°N 8,139°E]; 1 m 1 f, 6.iv.2009, Lower Saxony, Dollart, Dyksterhusen [53,294°N 7,242°E]; 1 m 1 f, 6.viii.2008, Lower Saxony, Elbe valley Jasebeck [53,163°N 11,135°E]; 1 m, 6.viii.2008, Lower Saxony, Elbe valley Kaltenhof [53,126°N 11,248°E]; 1 m, 25.v.2017, Lower Saxony, forest 1 km S Volzendorf [52,883°N 11,263°E]; 1 m 1 f, 28.v.2017, Lower Saxony, forest NW Gudow [53,298°N 11,000°E]; 1 m, 29.iv.2007, Lower Saxony, Grosses Giebelmoor [52,508°N 10,940°E]; 1 m, 23.v.2009, Lower Saxony, limeswamp Beierfelde [51,698°N 10,248°E]; 1 f, 4.iv.2017, Lower Saxony, Leer, Westerhammrich [53,241°N 7,440°E]; 1 f, 1.v.2005, Lower Saxony, Markatal SW Markhausen [52,923°N 7,827°E]; 1 m, 17.viii.2008, Lower Saxony, Meppener Kuhweide [52,666°N 7,257°E]; 1 m, 11.v.2008, Lower Saxony, Penkefitzer lake [53,136°N 11,129°E]; 1 m, 16.viii.2009, Lower Saxony, Thülsfelder reservoir [52,910°N 7,948°E]; 1 f, 29.iii.2003, Lower Saxony, Timmeler Meer [53,355°N 7,510°E]; 1 f, 3.v.2008, Lower Saxony, Zwischenahner Meer, Meyerhausen [53,207°N 8,032°E]; 1 m, 25.vii.2010, Saxony Anhalt, Elbe valley SE Schelldorf, Tangermünde [52,461°N 11,988°E]; FINLAND: 1 m, 18.vii.2020, Central Finland, Kolima 7.9 km ESE Pihtipudas [63,308°N 25,649°E]; 1 m, 20.vii.2020, Northern Ostrobothnia, Iijoki N Kauppila [65,331°N 25,381°E]; 1 m, 27.vii.2020, Northern Ostrobothnia, Kantoselkä 2.4 km E Lahokas [65,887°N 29,330°E]; GEORGIA: 3 ff, 10.vii.2019, small lake 2.2 km ENE Imera [41,650°N 44,215°E]; 1 m, 3.vii.2019, Snostskali River 0.6 km SE Achkhoti [42,618°N 44,624°E]; GREAT BRITAIN: 1 m, 21.vii.1982, East Norfolk, Catfield Great Fen, dykeside vegetation [52,735°N 1,494°E], leg. et det. A. G. Irwin, coll. Norwich Castle Museums; 1 m, 5.vii.1985, West Norfolk, Caudlesprings, south side of pond [52,572°N 0,861°E], leg. et det. A. G. Irwin, coll. Norwich Castle Museums; 1 m, 6.viii.1983, West Norfolk, Thompson Common dry Ranunculus / Cladium pool, [52,527°N 0,843°E], leg. et det. A. G. Irwin, coll. Norwich Castle Museums.

Remarks. The identification of this species is based on the interpretation of CLAUSEN (1983), which was subsequently adopted by KRIVOSHEINA and MATHIS (2010). CLAUSEN (1983) designated the lectotype and illustrated the terminalia, which clearly show the relevant identification characters. Axysta cesta is report- ed to be widely distributed in the Palaearctic, with by far the most published records being from central and northern Europe ( KRIVOSHEINA & MATHIS 2010). The records from Georgia presented here are the first for that country.

Figures

Figs 2–5. Terminalia of European Axysta: 2 = epandrium A. cesta, dorsal view; 3 = phallus A. cesta, lateral view; 4: epandrium A. clausseni, dorsal view; 5 = phallus A. clausseni, lateral

Figs 6–7. Distribution of microtrichia on anepisternum and anepimeron, lateral view: 6 = A. cesta; 7 = A. clausseni. Abbreviations: anepm = anepimeron, aneps = anepisternum