Thrypticus bellus Loew 1869

Thrypticus bellus Loew, 1869 Material examined. Bohemia: Dobroměřice (5648), Dobroměřický rybník (pond), 50°23′24″N 13°47′33″E, 195 m, Schpt, 12.viii.2023, 24 ♂ (MCH). Kateřina (5840), Soos NNR, 50°08′53″N 12°24′24″E, 440 m, saline swamp, Schpt / Elch, 5.vii.2021, 1 ♂ (MCH); same data, 10.vi.2022, 1 ♂ (MCH); same data, 21.vi.2023, 6 ♂ (MCH). Milčice (5855), 50°07′N 14°59′E, near pond, 13.v.1998, M. Barták lgt., 1 ♂ (CZUP). Hradec Králové (5861), 22.v.1961, V. Zeman lgt., 1 ♂ (NMPC). Teplá, 2 km SE (6043), Ovčí rybník (pond), 49°58′06″N 12°54′03″E, ca 665 m, sand/muddy banks, Elch, 28.vii.2023, 4 ♂ (MCH). Plzeň-Bolevec (6246), Velký bolevecký rybník (pond), 49°46′39″N 13°23′37″E, 310 m, Elch / Schpl, 18.vii.2023, 18 ♂ (MCH). Dobřany (6345), Šlovický vrch (hill), 49°39′45″N 13°18′53″E, 350–400 m, shallow pools on pasture, Elch, 19.vii.2021, 2 ♂ (MCH). Přestavlky, 1.5 km SW (6445), 49°35′21″N 13°13′17″E, 390 m, forest pond, Elch, 15.viii.2023, 5 ♂ (MCH). Soběkury (6445), Přední and Zadní rybník (ponds), 49°34′43″N 13°13′26″E, 430 m, Elch, 15.viii.2023, 6 ♂ (MCH). Postřekov (6542), Postřekovské rybníky NR, Obecní rybník (pond), 49°27′17″N 12°49′46″E, 400 m, 15.vi.2011, 1 ♂ (MCH); same data, muddy bottom of drained pond, Elch, 2.vii.2023, 3 ♂ (MCH); same data, pool near pond, 16.vii.2022, 1 ♂ (MCH). Dolní Lhota (6645), Luňáky NR, 49°22′31″N 13°14′41.5″E, 400 m, partly drained pond, Elch, 27.vii.2021, 6 ♂ (MCH). Tušť (7155), Velká pískovna (sandpit), 48°53′51.7″N 14°53′37″E, 445 m, margins of lake, 14.ix.2021, 1 ♂ (MCH). Moravia: Sedlec (7266), Lednické rybníky NNR, Nesyt pond, 48°46′24″N 16°43′22″E, 175 m, muddy bottom of partly drained pond, Schpt, 1.ix.2023, 2 ♂ (MCH). Distribution. Widespread in Palaearctic and Afrotropical Regions. Status in CZ. Recorded from both Bohemia and Moravia: Šlovice-Vysoká (Olejníček 1973), Hradec Králové (Mocek 1997), Bílina-Duchcov (Olejníček & Barták 2000), Vráž (Naglis et al. 2016); Lednice (Vaňhara 1981), Valtice-Rendezvous (Olejníček 1984), Lednice (Horní les) (Olejníček 1998). The record from Šlovice-Vysoká was based on two male specimens, currently deposited in the Olejníček collection in NMPC. They were examined during this study and re-identified as T. tarsalis and T. virescens, respectively. The occurrence in Vráž (southern Bohemia) is documented by a single male specimen (CZUP); all other specimens examined (CZUP, NMPC) were re-identified as T. tarsalis (listed below). Ecology. Reared from Phragmites australis (Cavanilles) (Waitzbauer et al. 1973) and Juncus (Hering 1957) both of which are fairly common in Central European wetlands (including most, if not all, of the above listed localities). However, despite several attempts, none of the CZ specimens (MCH) were swept directly from these plants. On the other hand, most of the new records come from sites where Eleocharis or Schoenoplectus plants were also present, and specimens were often obtained by sweeps targeting these plants (vegetation with their stands/patches). These data seem to suggest that T. bellus larvae might develop in a wider range of monocotyledons.
Published as part of Kejval, Zbyněk & Pollet, Marc, 2024, Long-legged flies (Diptera: Dolichopodidae) in the Czech Republic- 2. Corindia and Thrypticus, pp. 411-424 in Zootaxa 5432 (3) on pages 414-415, DOI: 10.11646/zootaxa.5432.3.5, http://zenodo.org/record/10906675